7SJ6216-.....-.... - Siemens

SIPROTEC

Multi-Functional Protective

Relay with Local Control

7SJ62/63/64

V4.6

7SJ63

V4.7

Manual

C53000-G1140-C147-A

Preface

Introduction

Functions

Mounting and Commissioning

Technical Data

Appendix

Literature

Glossary

Index

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Disclaimer of liability

We have checked the contents of this manual against the hard-

ware and software described. However, deviations from the de-

scription cannot be completely ruled out, so that no liability can

be accepted for any errors or omissions contained in the informa-

tion given.

The information given in this document is reviewed regularly and

any necessary corrections will be included in subsequent edi-

tions. We appreciate any suggested improvements.

We reserve the right to make technical improvements without

notice.

Document version 04.64.01

Edition 07.2015

Dissemination or reproduction of this document, or evaluation

and communication of its contents, is not authorized except

where expressly permitted. Violations are liable for damages. All

rights reserved, particularly for the purposes of patent application

or trademark registration.

Registered Trademarks

SIPROTEC, SINAUT, SICAM and DIGSI are registered trade-

marks of Siemens AG. Other designations in this manual might

be trademarks whose use by third parties for their own purposes

would infringe the rights of the owner.

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Preface

Purpose of this

Manual This manual describes the functions, operation, installation, and commissioning of the

device 7SJ62/63/64. In particular, one will find:

• Information on the Device Configuration an d a de scr ip tion of th e device fun ctio n s

and setting options → Chapter 2;

• Instructions for mounting and commissioning → Chap ter 3;

• List of technical da ta → Chapter 4;

• As well as a compilation of the most significant data for experienced users in Ap-

pendix A.

For general information on operation and configuration of SIPROTEC 4 devices,

please refer to the SIPROTEC System Description /1/.

Target Audience Protection en gin eer s, co mm iss i oning en gineers, personnel concerned with adjust-

ment, checking, and service of selective protective eq uipment, automatic and co ntrol

facilities, and personnel of electrical facilities and power plants.

Applicability of this

Manual This manual is valid for: SIPROTEC 4 Multi-Functional Protective Relay with Local

Control 7SJ62/63/64 firmware version V4.6 anf for 7SJ63 fir mware version V4.7.

The function a lity of the de vice s 7S J63 V4.6 and V4.7 is identical.

7SJ63 firmware versions V4.7 are actual maintenance versions.

Indication of Con-

formity

This product complies with the directive of the Council of the European Commu-

nities on the approximation of the laws of the Member States relating to electro-

magnetic compatibility (EMC Council Directive 89/336/EEC) and concerning elec-

trical equipment for use within specified voltage limits (Low-voltage directive 73/23

EEC).

This conformity has been proved by tests performed according to Article 10 of the

Council Directive in agreement with th e generic standards EN 61000-6-2 and

EN 61000-6-4 (for EMC directive) and with the standard EN 60255-6 (for Low

Voltage Directive) by Siemens. AG.

This device is designed and manufactured for application in industrial environ-

ment.

The product conforms with the international standards of IEC 60255 and the

German standard VDE 0435.

Preface

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Additional Support Should further information on the System SIPROTEC 4 be desired or should particular

problems arise which are not covered sufficiently for the purchaser's purpose, the

matter should be referred to the local Siemens representative.

Training Courses Individual course offerings may be found in our T raining Catalogue, or questions may

be directed to our training centre in Nuremberg.

Further standards IEEE Std C37.90-*

Instructions and

Warnings The warnings and notes cont ained in this manual serv e for your own safety and for

an appropriate lifetime of the device. Please observe them!

The following indicators and standard definitions are used:

DANGER

indicates that death, severe personal injury or substantial property damage will

result if proper precautions are not taken.

Warning

indicates that death, severe personal injury or substantial property damage can

result if proper precautions are not taken.

Caution

indicates that minor personal injury or proper ty damage can resu lt if proper pr ecau-

tions are not t aken. This particularly applies to damage on or in the device itself and

consequential damage thereof.

Note

indicates information about the device or respective part of the instruction manual

which is essential to highlight.

Preface

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

WARNING!

When operating an electrical device, cert ain parts of the device inevitably have dan-

gerous voltages.

Failure to observe these precautions can result in fatality, personal injury , or extensive

material damage.

Only qualified personnel shall work on and around this equipment. It must be thor-

oughly familiar with all warnings and safety notices of this manual as well as with the

applicable safety regulations.

The successful and safe operation of this device is dependent on pro per hand ling, in-

stallation , operation, and maintenance by qualified personnel under observance of al l

warnings and hints contained in this manual. In particular the general erection and

safety regulations (e.g. IEC, DIN, VDE, EN or other national and international stan-

dards) regarding the correct use of hoisting gear must be observed.

Deviations may be permitted in drawings and t ables when the type o f designato r can

be obviously derived from the illustration.

Definition QUALIFIED PERSONNEL

For the purpose of this instruction ma nual and p roduct labels, a qu alified person is

one who is familiar with the installation, construction and operation of the equipment

and the hazards involved. In addition, he has the following qualifications:

• Is trained and author ized to energize, de-energize, clear, ground and tag cir cuits

and equipment in accordance with established safety practices.

• Is trained in the proper care and use of protective equipment in accordance with

established safety practices.

• Is trained in re nd e rin g firs t aid.

Typographic and

Graphical Conven-

tions

To designate terms which refer in the text to information of the device or for the

device, the following fonts are used:

Parameter names

Designators of configuration or fun ction parameters which may appear word-for-

word in the display of the device or on the scr een of a pe rsonal compu ter (with op-

eration software DIGSI), ar e marked in bold letters of a monospace type style. This

also applies to header bars for selection menus.

1234A

Parameter addre sses have the same ch aracter style as p arameter names. Param-

eter addresses cont ain the suf fix A in the overview t ables if the p arameter can o nly

be set in DIGSI via the option Display additional settings.

Parameter Conditions

possible settings of text parameters, which may appear word-for-word in the display

of the device or on the screen of a personal computer (with operation software

DIGSI), are additionally written in it alics. This also applies to head er bar s for sele c-

tion menus.

„Annunciations“

Designators for information, which may be output by the relay or required from other

devices or from the switch gear, are marked in a monosp ace type style in quot ation

marks.

Preface

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following symbols are used in drawings:

Besides these, graphical symbols are used according to IEC 60617-12 and IEC

60617-13 or symbols derived from these standards. Some of the most frequently used

are listed below:

Device-internal logical input signal

Device-internal logical output signal

Internal input signal of an analog quantity

External binary input sign al with number (bin ary input, input

indication)

External binary output signal with number (device in dication)

External binary output signal with number (device indication)

used as input signal

Example of a parameter switch designated FUNCTION with

the address 1234 and the possible settings ON and OFF

Preface

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

■

Input signal of an analog quantity

AND gate

OR gate

Exclusive–OR gate (antivalence): output is active, if only

one of the inputs is active

Equivalence: output is active, if both inputs are active or in-

active at the same time

Dynamic input s (edge–triggered ) above with positive, below

with negative edge

Formation of one analog output signal from a number of

analog input signals

Limit stage with setting address and parameter designa tor

(name)

Timer (pickup delay T, example adjustable) with setting

address and parameter designator (name)

Timer (dropout delay T, example non-adjusta ble)

Dynamic triggered pulse timer T (monoflop)

Static memory (RS-flipflop) with setting input (S), resetting

input (R), output (Q) and inverted output (Q)

Preface

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Contents

1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1.1 Overall Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1.2 Application Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1.3 Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.1.1 Functional Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.1.1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.1.1.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.1.1.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.1.2 Device, General Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.1.2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.1.2.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.1.2.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2.1.2.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2.1.3 Power System Data 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2.1.3.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2.1.3.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2.1.3.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

2.1.3.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

2.1.4 Oscillographic Fault Records. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

2.1.4.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

2.1.4.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

2.1.4.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.1.4.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.1.5 Settings Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

2.1.5.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

2.1.5.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

2.1.5.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

2.1.5.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

2.1.6 Power System Data 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2.1.6.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2.1.6.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2.1.6.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.1.6.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

2.1.7 EN100-Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.1.7.1 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.1.7.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

2.1.7.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.2 Overcurrent Protection 50, 51, 50N, 51N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2.2.2 Definit e High- C ur re n t Elem en ts 50-2, 50N-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

2.2.3 Definite Overcurrent Elem en ts 50-1, 50N- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

2.2.4 Inverse Time Overcurrent Elements 51, 51N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

2.2.5 Dynamic Cold Load Pickup Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

2.2.6 Inrush Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

2.2.7 Pickup Logic and Tripping Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

2.2.8 Two-Phase Time Over current Protection (non-directional only) . . . . . . . . . . . . . . . . . . . . . 73

2.2.9 Busbar Protection by Use of Reverse Interlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

2.2.10 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

2.2.11 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

2.2.12 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

2.3 Directional Overcurrent Protection 67, 67N. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

2.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

2.3.2 Definite Time, Directional High-set Elements 67-2, 67N-2 . . . . . . . . . . . . . . . . . . . . . . . . . 90

2.3.3 Definite Time, Directional Overcurrent Elements 67-1, 67N-1. . . . . . . . . . . . . . . . . . . . . . . 92

2.3.4 Inverse Time, Directional Overcurrent Protection Element s 67-TOC, 67N-TOC. . . . . . . . . 94

2.3.5 Interaction with the Fuse Failure Monitor (FFM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.3.6 Dynamic Cold Load Pickup Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.3.7 Inrush Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.3.8 Determination of Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.3.9 Reverse Interlocking for Double End Fed Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

2.3.10 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

2.3.11 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

2.3.12 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

2.4 Dynamic Cold Load Pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

2.4.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

2.4.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

2.4.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

2.4.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

2.5 Single-Phase Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

2.5.1 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

2.5.2 High-impedance Ground Fault Unit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

2.5.3 Tank Leakage Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

2.5.4 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

2.5.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

2.5.6 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.6 Voltage Protection 27, 59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

2.6.1 Measurement Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

2.6.2 Overvoltage Protection 59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

2.6.3 Undervoltage Protection 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

2.6.4 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

2.6.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

2.6.6 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

2.7 Negative Sequence Protection 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

2.7.1 Definite Time element 46-1, 46-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

2.7.2 Inverse Time element 46-TOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

2.7.3 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

2.7.4 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

2.7.5 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

2.8 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66). . . . . . . . . . . . . 154

2.8.1 Motor Starting Protection 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

2.8.1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

2.8.1.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

2.8.2 Motor Restart Inhibit 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

2.8.2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

2.8.2.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

2.8.3 Motor (Motor Starting Protection 48, Motor Restart Inhibit 66) . . . . . . . . . . . . . . . . . . . . . 169

2.8.3.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

2.8.3.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

2.9 Frequency Protection 81 O/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

2.9.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

2.9.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

2.9.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

2.9.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

2.10 Thermal Overload Protection 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

2.10.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

2.10.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

2.10.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

2.10.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.11 Monitoring Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

2.11.1 Measurement Supervision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

2.11.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

2.11.1.2 Hardware Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

2.11.1.3 Software Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

2.11.1.4 Monitoring of the Transfor mer Cir cuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

2.11.1.5 Measurement Voltage Failure Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

2.11.1.6 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

2.11.1.7 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

2.11.1.8 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

2.11.2 Trip Circuit Supervision 74TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

2.11.2.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

2.11.2.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

2.11.2.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

2.11.2.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

2.11.3 Malfunction Responses of the Monitoring Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

2.11.3.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

2.12 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

2.12.1 Voltage Element 64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

2.12.2 Current Elements 50Ns, 51Ns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

2.12.3 Determination of Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

2.12.4 Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

2.12.5 Ground Fault Location (in isolated systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

2.12.6 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

2.12.7 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

2.12.8 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

2.13 Intermittent Ground Fault Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

2.13.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

2.13.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

2.13.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227

2.13.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227

2.14 Automatic Reclosing System 79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228

2.14.1 Program Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229

2.14.2 Blocking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

2.14.3 Status Recognition and Monitoring of the Circuit Breaker. . . . . . . . . . . . . . . . . . . . . . . . . 235

2.14.4 Controlling Protective Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

2.14.5 Zone Sequencing (not available for models 7SJ6***-**A**-) . . . . . . . . . . . . . . . . . . . . . . . 239

2.14.6 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

2.14.7 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

2.14.8 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

2.15 Fault Locator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

2.15.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

2.15.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

2.15.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

2.15.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.16 Breaker Failure Protection 50BF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

2.16.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

2.16.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

2.16.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

2.16.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

2.17 Flexible Protection Functions (7SJ64 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

2.17.1 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

2.17.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

2.17.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

2.17.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

2.18 Reverse-Power Protection Application with Flexible Protection Function. . . . . . . . . . . . . 274

2.18.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

2.18.2 Implementation of the Reverse-Power Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

2.18.3 Configuring the Reverse-Powe r Protection in DIGSI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

2.19 Synchronism and Voltage Check 25 (7SJ64 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

2.19.1 SYNC Function group 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

2.19.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

2.19.1.2 Synchrocheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286

2.19.1.3 Synchronous / Asynchronous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

2.19.1.4 De-energized Switching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

2.19.1.5 Direct Command / Blocking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289

2.19.1.6 SYNC Function Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289

2.19.1.7 Interaction with Control, AR and External Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

2.19.1.8 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

2.19.1.9 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

2.19.1.10 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

2.20 Temperature Detection via RTD Boxes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

2.20.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

2.20.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

2.20.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

2.20.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309

2.21 Phase Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

2.21.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

2.21.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

2.22 Function Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

2.22.1 Pickup Logic for the Entire Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

2.22.2 Tripping Logic of the Entire Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

2.22.3 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.23 Auxiliary Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

2.23.1 Commissionig Aids with Browser (7SJ64 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

2.23.1.1 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

2.23.1.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

2.23.2 Message Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

2.23.2.1 LED Display and Binary Outputs (output relays). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

2.23.2.2 Information on the Integrated Display (LCD) or Personal Computer. . . . . . . . . . . . . . . . . 318

2.23.2.3 Information to a Substation Control Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319

2.23.3 Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

2.23.3.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

2.23.3.2 Circuit-Breaker Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321

2.23.3.3 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328

2.23.3.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

2.23.4 Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

2.23.4.1 Display of Measured Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

2.23.4.2 Transfer of Measured Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

2.23.4.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

2.23.5 Average Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

2.23.5.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

2.23.5.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

2.23.5.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

2.23.5.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

2.23.6 Min/Max Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

2.23.6.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

2.23.6.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

2.23.6.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

2.23.6.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

2.23.7 Set Points for Measured Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

2.23.7.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

2.23.7.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

2.23.7.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

2.23.8 Set Points for Statistic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

2.23.8.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

2.23.8.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

2.23.8.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

2.23.9 Energy Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

2.23.9.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

2.23.9.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

2.23.9.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

2.23.9.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

2.23.10 Commissioning Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343

2.23.10.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343

2.24 Protection for Single-phase Voltage Transformer Connection. . . . . . . . . . . . . . . . . . . . . . 345

2.24.1 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345

2.24.2 Impact s on the Functionality of the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346

2.24.3 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.25 Breaker Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350

2.25.1 Control Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350

2.25.1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350

2.25.1.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351

2.25.2 Types of Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352

2.25.2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352

2.25.3 Command Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353

2.25.3.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353

2.25.4 Interlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354

2.25.4.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354

2.25.5 Command Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362

2.25.5.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362

3 Mounting and Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364

3.1 Mounting and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365

3.1.1 Configuration Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365

3.1.2 Hardware Modifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

3.1.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

3.1.2.2 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 372

3.1.2.3 Switching Elements on the Printed Circuit Boards of Device 7SJ62. . . . . . . . . . . . . . . . . 378

3.1.2.4 Switching Elements on the Printed Circuit Boards of Device 7SJ63. . . . . . . . . . . . . . . . . 384

3.1.2.5 Switching Elements on the Printed Circuit Boards of Device 7SJ64 . . . . . . . . . . . . . . . . 392

3.1.2.6 Interface Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402

3.1.2.7 Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

3.1.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

3.1.3.1 Panel Flush Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

3.1.3.2 Rack Mounting and Cubicle Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408

3.1.3.3 Panel Surface Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .411

3.1.3.4 Mounting with Detached Operator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412

3.1.3.5 Mounting without Operator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413

3.2 Checking Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415

3.2.1 Checking Data Connections of Serial Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415

3.2.2 Checking System Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

3.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420

3.3.1 Test Mode and Transmission Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421

3.3.2 Checking the System (SCADA) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421

3.3.3 Checking the Status of Binary Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423

3.3.4 Tests for Circuit Breaker Failure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426

3.3.5 Checking User-Defined Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427

3.3.6 Current, Voltage, and Phase Rotation Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427

3.3.7 Test for High Impedance Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429

3.3.8 Testing the Reverse Interlocking Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429

3.3.9 Direction Check with Load Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429

3.3.10 Polarity Check for Voltage Input V4 (only 7SJ64) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431

3.3.11 Ground Fault Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433

3.3.12 Polarity Check for Cu rrent Input IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434

3.3.13 Checking the Temperature Measurement via RTD-Box . . . . . . . . . . . . . . . . . . . . . . . . . . 436

3.3.14 Measuring the Operating Time of the Circuit Breaker (only 7SJ64) . . . . . . . . . . . . . . . . . 437

3.3.15 Trip/Close Tests for the Configured Operating Devices . . . . . . . . . . . . . . . . . . . . . . . . . . 438

3.3.16 Creating Oscillographic Recordings for Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 439

3.4 Final Preparation of the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 440

4 Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442

4.1 General Device Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444

4.1.1 Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444

4.1.2 Auxiliary Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445

4.1.3 Binary Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446

4.1.4 Communication Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448

4.1.5 Electrical Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454

4.1.6 Mechanical Stress Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455

4.1.7 Climatic Stress Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456

4.1.8 Service Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457

4.1.9 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457

4.1.10 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457

4.2 Definite Time Overcurrent Protection 50, 50N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459

4.3 Inverse Time Overcurrent Protection 51, 51N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 461

4.4 Directional Time Overcurrent Protection 67, 67N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473

4.5 Inrush Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475

4.6 Dynamic Cold Load Pickup Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476

4.7 Single-Phase Overcurrent Protection 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477

4.8 Voltage Protection 27, 59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478

4.9 Negative Sequence Protection 46-1, 46-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 480

4.10 Negative Sequence Protection 46-TOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

4.11 Motor Starting Protection 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 487

4.12 Motor Restart Inhibit 66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 488

4.13 Frequency Protection 81 O/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489

4.14 Thermal Overload Protection 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490

4.15 Ground Fault Detection 64, 50Ns, 51Ns, 67Ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493

4.16 Intermittent Ground Fault Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 497

4.17 Automatic Reclosing System 79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 498

4.18 Fault Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 499

4.19 Circuit Breaker Failure Protection 50BF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500

4.20 Flexible Protection Functions (7SJ64 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501

4.21 Synchronism and Voltage Check 25 (7SJ64 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503

4.22 RTD Boxes for Temperature Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505

4.23 User-defined Functions (CFC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506

4.24 Additional Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .511

4.25 Breaker Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517

4.26 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 518

4.26.1 Panel Flush and Cubicle Mounting (Housing Size 1/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . 518

4.26.2 Panel Flush and Cubicle Mounting (Housing Size 1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 519

4.26.3 Panel Flush and Cubicle Mounting (Housing Size 1/1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 520

4.26.4 Panel Surface Mounting (Housing Size 1/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521

4.26.5 Panel Surface Mounting (Housing Size 1/2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521

4.26.6 Panel Surface Mounting (Housing Size 1/1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 522

4.26.7 Surface-moun ted Housing with Detached Operator Panel or without Operator Panel

(Housing Size 1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523

4.26.8 Housing for Mounting with Detached Operator Panel or without Operator Panel

(Housing Size 1/1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 524

4.26.9 Detached Operator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525

4.26.10 D-Subminiature Connector of Dongle Cable (Panel Flush or Cubicle Door Cutout). . . . . 526

A Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528

A.1 Ordering Information and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 529

A.1.1 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 529

A.1.1.1 7SJ62 V4.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 529

A.1.1.2 7SJ63 V4.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 533

A.1.1.3 7SJ64 V4.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 537

A.1.2 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 541

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

A.2 Terminal Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543

A.2.1 7SJ62 — Housing for panel flush mounting or cubicle installation . . . . . . . . . . . . . . . . . . 543

A.2.2 7SJ62 — Housing for Panel Surface Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545

A.2.3 7SJ62 — Inte rf ace assignmen t on hous in g fo r panel surface mounting . . . . . . . . . . . . . . 547

A.2.4 7SJ63 — Housing for panel flush mounting or cubicle installation . . . . . . . . . . . . . . . . . . 549

A.2.5 7SJ631/2/3 — Housing for panel surface mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556

A.2.6 7SJ63 1/ 2/ 3 — Int er fa c e assignm e nt on ho us ing for panel surface mounting . . . . . . . . . . 559

A.2.7 7SJ635/6 — Housing for panel surface mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561

A.2.8 7SJ635/6 — Interface assignment on housing for panel surface mounting . . . . . . . . . . . 565

A.2.9 7SJ63 — Housing with detached operator panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 567

A.2.10 7SJ63 — Housing for Panel Surface Mounting without Operator Panel . . . . . . . . . . . . . . 574

A.2.11 7SJ64 — Housing for Panel Flush Mounting or Cubicle Installation . . . . . . . . . . . . . . . . . 581

A.2.12 7SJ64 — Housing for Panel Surface Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 586

A.2.13 7SJ64 — Housing with Detached Operator Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591

A.2.14 7SJ64 — Housing for Panel Surface Mounting without Operator Panel . . . . . . . . . . . . . . 595

A.2.15 Connector Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 598

A.3 Connection Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599

A.3.1 Connection Examples for 7SJ62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599

A.3.2 Connection Examples for 7SJ63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606

A.3.3 Connection Examples for 7SJ64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 615

A.3.4 Connection example for high-impedance groun d fault differential protection . . . . . . . . . . 625

A.3.5 Connection Examples for RTD-Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625

A.4 Current Transformer Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 627

A.4.1 Accuracy limiting factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 627

A.4.2 Class conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 628

A.4.3 Cable core balance current transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629

A.5 Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 630

A.5.1 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 630

A.5.2 Binary Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 630

A.5.3 Binary Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 631

A.5.4 Function Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 632

A.5.5 Default Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 632

A.5.6 Pre-defined CFC Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 637

A.6 Protocol-dependent Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 640

A.7 Functional Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 641

A.8 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 644

A.9 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665

A.10 Group Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 692

A.11 Measured Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 693

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 698

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 708

Contents

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Introduction

The device family SIPROTEC 7SJ62/63/64 devices is introduced in this section. An

overview of the devices is pr esented in their application, char acteristics, and scope of

functions.

1.1 Overall Operation 21

1.2 Application Scope 25

1.3 Characteristics 28

1 Introduction

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

1.1 Overall Operation

The SIPROTEC 7SJ62/63/64 are numerical, multi-functional, protective and control

devices equipped with a powerful microprocessor. All tasks are processed dig itally ex-

clusively , from acquisition of measured values up to commands to the circuit breakers.

Figure 1-1 illustrates the basic structure of the devices 7SJ62/63, Figure 1-2 illustrates

the basic structure of the device 7SJ64.

Analog Inputs The measuring inputs (MI) convert the currents a nd voltages coming from the instru-

ment transformers and a dapt them to the level appropriate for the internal processing

of the device. The device pr ovides four current inputs. Depending on the model, the

device is also equipped with three or four voltage inputs. Three current inputs serve

for input of the phase currents. Depending on the model, the fourth current input (IN)

may be used for measuring the gr ound fault curr ent IN (current transformer starpoint)

or for a separate ground current transformer (for sensitive ground fault detection INs

and directional determination of gr ound faults).

Figure 1-1 Hardware structure of the numerical mu lti-functional protection device 7SJ62

and 7SJ63

1.1 Overall Operation

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Volta ge input s can either be use d to meas ure the three ph ase-to -ground volt age s, or

two phase-to-phase volt ages and the displacement voltage (VN voltage). It is also pos-

sible to connect two phase-to-phase voltages in open-delta connection.

The four volt age tr ansforme rs of 7SJ64 can either be applied fo r the input o f 3 phase-

to-ground volt ages, one displacement vo ltage ( VN voltag e) or a further voltage for the

synchronizing function.

The analog input quantities are passed on to the input amplifiers (IA). The input am-

plifier IA stage provide s high-resistance term inations for the analog input quantities. It

consists of filters that are optimized for measured-value processing with regard to

bandwidth and proc essing speed.

The analog-to - dig ital (AD) stage consis ts of a multiplex or, an analog-to- dig ital (A/D)

converter and of memory components for the transmission of digit al sign als to the m i-

crocomputer system.

Figure 1-2 Hardware structure of the numerical multi-functional device 7SJ64

Microcomputer

System Apart from processing the measur ed valu es, the micr ocomputer system ( μC) also ex-

ecutes the actual protection and control functions. They especially include:

• Filtering and preparation of the measured quantities

• Continuous monitoring of the measured quantities

1 Introduction

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

• Monitoring of the pic k up con d itio ns for the individual protective functions

• Interrogation of limit values and sequences in time

• Control of signals for the logic functions

• Output of control commands for switching devices

• Recording of messages, fault data and fault values for analysis

• Management of the operating system and the associated functions such as data re-

cording, real-time clock, communication, interfaces, etc.

• The information is provided via output amplifiers (OA).

Binary Inputs and

Outputs The com pu te r sys te m ob tains extern al info rm a tio n th ro ug h the bina ry inp u t/o ut pu t

modules (input s a nd ou tput s). T he comp uter system ob t ains the infor mation from the

system (e.g remote resetting) or the external equipment (e.g. blocking commands).

Outputs are, in particular, commands to the switchgear units and indications for

remote signalling of important events and statuses.

Front Elements With devices with integrated or detached operator panel, information such as messag-

es related to even ts, states, mea sur e d values and the functional status of the device

are provided via light-emitting diodes (LEDs) and a displa y screen (LCD) on the front

panel.

Integrated control and numeric keys in conjunction with the LCD facilitate interaction

with the remote device. Via these elements all information of the device such as con-

figuration and setting parameters, operating and fault messages, and measured

values can be accessed. Setting parameters may be changed in the same way.

In addition, control of circuit breakers and other equipment is possible from the front

panel of the device.

Serial Interfaces A serial PC inter face on the front pane l is provided for local communications with the

device through a personal computer using the operating program DIGSI.This facili-

tate s a comfortable handling of all device functions.

A separate service interface can be provided for remote communication with the

device via a personal computer using DIGSI. This interface is especially well suited for

dedicated connection of the devices to the PC or for ope ration via a modem. The

service interface can also be used to con nect an RTD box (= resista nce te mpera ture

detector) for entering external temperatures (e.g. for overload protection).

The additional interface (only 7SJ64) is designed exclusively for connection of a

RTD-Box (= resistance temperature detector) for entering external temperatures.

All data can be transferred to a central control center or monitoring system via the

serial system interface. This interface may be provided with various protocols and

physical transmission schemes to suit the particular application.

A further interface is provided for the time synchronization of the internal clock via

external synch ro ni zation sources.

Further communication protocols can be realized via additional interface modules.

Over the operating or service interface you can serve the device (only with 7SJ64)

from a distance or locally with a standard Browser . This can take place during the initial

start-up, examination and also during the operation with the devices. For this the

SIPROTEC 4 standard "Web monitor" is available.

1.1 Overall Operation

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Power Supply The before-mentioned function elements and their voltage levels are supplied with

power by a power supplying unit (Vaux or PS). Voltage dips may occur if the voltage

supply system (subst ation battery) becomes short-circu ited. Usually , th ey are bridged

by a capacitor (see also Technical Data).

1 Introduction

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

1.2 Application Scope

The numerical, multi-functional SIPROTEC 4 7SJ62/63/64 are versatile devices de-

signed for protection, control and monitoring of busbar feeders. The devices can be

used for line protection in networks that are grounded, low-resistance grounded, un-

grounded, or of a compensated neutral point structure. They are suited for networks

that are radial or loo ped, and for lines with single or multi-terminal feeds. The devices

are equipped with motor protection applicable for asynchrono us machines of all sizes.

The devices include the functions that are necessary for protection, monitoring of

circuit breaker positions, and control of the circuit breakers in straight bus applications

or breaker-and-a-half configurations; therefore, the devices can be universally em-

ployed. The devices provide excellent backup facilities of differential protective

schemes of lines, transformers, genera tors, motors, and busbars of all voltage levels.

Protectiv e Func-

tions Non-directional overcurrent protection (50, 50N, 51, 51N) is the basis of the de vice.

There are two definite time overcurrent protective elements and one inverse time over-

current protective element for phase and ground current. For inverse time overcurrent

protective elements, several characte ristics of d ifferent standards a re p rovided. Alte r-

natively, user-defined characteristics can be programmed.

Depending on the version of the device that is ordered, the non-directional overcurrent

protection can be supplemented with directional overcurrent protection (67, 67N),

breaker failure protection (50BF), and sensitive ground fault detection for high-resis-

tance ground faults. The highly sensitive ground fa ult detection can be directional or

non-directional.

In addition to the fault protection functions alread y me nt ion ed , ot he r pr ot ective func-

tions are available. Some of them depen d on the ve rsion of the device that is ordered.

These additional functions include frequency protection (81O/U), overvoltage protec-

tion (59) and undervoltage protection (27) , negative sequence protection (46) and

overload protection ( 49) wi th st art in hibit for mo tors (66/68) and motor star ting protec-

tion (48), as well as automatic reclosing (79) which allows different reclosing cycles on

overhead lines. The automatic reclosing system may also be connected externally . To

ensure quick detection of the fault, the device is equippe d with a fault locator.

A protection feature can be ordered for the detection of intermittent ground faults

which detects and accumulates transient ground faults.

External detectors account for ambient temperatures or coolant temperatures ( by

means of an external RTD-box).

Before reclosing a fter thre e-pole tripping 7SJ64 can verify the validity of the reclosure

by voltage check and/or synchronous check. The synchronization function can also be

controlled externally.

Control Functions The device p rovides a control function which can be accom plished fo r activa tin g and

deactivating switchgears via the integrated operator panel, the system interface,

binary inputs, and the serial port using a personal computer with DIGSI.

The status of the primary equipment can be transmitted to the device via auxiliary con-

tact s connected to binary inp uts. The p resent sta tus (or position) of th e primary equip-

ment can be displayed on the device, and used for interlocking or plausibility monitor-

ing. The number of the operating equipment to be switched is limited by the binary

inputs an d outputs available in the device or th e binary inputs and output s allocated

for the switch position indications. De pending on the primary equipment being con-

1.2 Application Scope

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

trolled, one binary input ( single point indication) or two binary inputs (double point in-

dication) may be used for this process.

The capability of switching primary equipment can be restricted by a setting associat-

ed with switching auth or ity (Rem o te or Local), and by the operating mode (inter-

locked/non-interlocked, with or without password request).

Processing of interlocking conditions for switching (e.g. switchgear interlocking) can

be established with the aid of integrated, use r-configurable logic functions.

Messages and M ea-

sured Values; Re-

cording of Event

and Fault Data

The operating messages provide information about conditions in the power system

and the device. Measurement quantities and values that are calculated can be dis-

played locally and communicated via the serial interfaces.

Device messages can be assigned to a number of LEDs on the front cover (allocat-

able), can be externally processed via output contacts (allocatable), linked with user-

definable logic functions and/or issued via serial interfaces.

During a fault (system fault) import ant even ts and changes in con ditions are saved in

fault protocols (Event Log or Trip Log). Instantaneous fault values are also saved in

the device and may be analized subsequently.

Communication Serial interfaces are available for the communication with operating, control and

memory systems.

A 9-pole DSUB socket at the front panel is used for local communication with a per-

sonal computer. By means of the SIPROTEC operating sof tware DIGSI, all operation

and evaluation tasks can be executed via this user interface, such as specifying an d

modifying configuration parameters and settings, configuring user-specific logic func-

tions, retrieving operational messages and measured values, inquiring device condi-

tions and measured values, issuing control commands.

Depending on the in dividual o rder ing var iant, a ddi tional inter faces a re loca ted on the

rear side of the device. They serve to establish an extensive communication with other

digital operating, control and memory components:

The service interface can be op erated via electrical dat a lines or fiber optics and also

allows communication via modem. For this reason, remote operation is possible via

personal computer and th e DIGSI operating sof tware, e.g. to op erate several devices

via a central PC.

The additional port (only 7SJ64) is designed exclusively for connection of a R TD-Box

(= resistance tem perature detector) for enterin g external temperatures. It can also b e

operated via data lines or fibre optic cables.

The system interface ensures the central communication between the device and the

substation controller. It can also be operated via data lines or fibre optic cables. For

the data transfer S tandard Protocols according IEC 60870 870-5-103 are available via

the system port. The integration of the devices into the automation systems SINAUT

LSA and SICAM can also take place with this profile.

The EN-100-module allows the devices to be integrated in 100-Mbit-Ethernet commu-

nication networks in control and automation systems using protocols according to

IEC61850. Bes i des c ontr ol sys te m int eg ratio n, this inte rf ac e en a ble s DIG SI-commu-

nication and inter-relay communication via GOOSE.

Alternatively, a field bus coupling with PROFIBUS FMS is available for SIPROTEC 4.

The PROFIBUS FMS according to DIN 19245 is an open communication standard

that has particula rly wide acceptan ce in process control a nd automation engineering,

with especially high per formance. A p rofile has bee n defined fo r the PROFIBUS com-

1 Introduction

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

munication that covers all of the information types required for pr otective and process

control engineering. The integration of the devices into the power automation system

SICAM can also take place with this profile.

Besides the field-bus connection with PROFIBUS FMS, further couplings are possible

with PROFIBUS DP and the protocols DNP3.0 and MODBUS. These protocols do not

support all possibilities which are offered by PROFIBUS FMS.

1.3 Characteristics

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

1.3 Characteristics

General Character-

istics • Powerful 32-bit microprocessor system.

• Complete digit al processing and contro l of measured va lues, from th e samp ling of

the analog input quantities to the initiation of outputs, for example, tripping or

closing circuit breakers or other switchgear devices.

• Total electrical separation between the internal processing stages of the device and

the external transformer, control, and DC supply circuits of the system because of

the design of the binary inputs, outputs, and the DC or AC converters.

• Complete set of functions necessary for the proper protection of lines, feeders,

motors, and busbars.

• Easy device operation through an integrated operator pan el or by means of a con-

nected personal computer running DIGSI.

• Continuous calculation and display of measured and metered values on the front of

the device.

• Storage of min/max measured values (slave pointer function) and storage of long-

term mean values.

• Recording of event and fault data for the last eight system faults (fault in a network)

with real-time information as well as instantaneous values for fault recording for a

maximum time range of 5 s.

• Constant mo nitoring of the measurement quantities, as well as continuous self-di-

agnostics covering the hardware and software.

• Communication with SCADA or substation controller equipment via serial interfaces

through the choice of data cable, modem, or optical fibers.

• Battery-buffered clock that can be synchronized with an IRIG-B (via satellite) or

DCF77 signal, binary input signal, or system interface command.

• Statistics: Recordin g of the nu m be r of tr ip signals instigated by the device and

logging of currents switched off last by the device, as well as accumulated short

circuit currents of each pole of the circuit breaker.

• Operating Hours Counter: Tracking of operating hours of the equipment being pro-

tected.

• Commissioning aids such as connection check, direction determination , status in-

dication of all binary input s an d outputs, easy check of system interface and influ-

encing of information of the system interface during test operation

Time Overcurrent

Protection 50, 51,

50N, 51N

• T wo definite time overcurrent protective elements and one inverse time overcurrent

protective element for phase cu rrent and ground current IN or summation current

3I0;

• Two-phase operation of the overcurrent protection (IA, IC) possible;

• Different curves of common standards are available for 51 and 51N, or a user-

defined characteristic;

• Blocking capability e.g. for reverse interlocking with any element;

• Instantaneous tripping by any overcurrent eleme nt upon switch onto fault is possi-

ble;

• Second harmonic inrush restraint.

1 Introduction

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Ground Fault Pro-

tection 50 N, 51N • T wo definite time overcurrent protective elements and one inverse time overcurrent

protective element for high-resistance ground faults in grounded systems;

• Different curves of common standards are available for 51 and 51N, or a user-

defined characteristic;

• Second harmonic inrush restraint;

• Instantaneous tripping by any overcurrent element upon switch onto fault is possi-

ble.

Directional Time

Overcurrent Pro-

tection 67 , 67 N

• Three directional time overcurrent elements for both phase protection and ground

protection operate in parallel to the non-directional time overcurrent elements. Their

pickup values and time delays can be set independently from the non-directional

time overcurrent elements.

• Fault direction with cross-polarized voltages and voltage memory. Dynamically un-

limited direction sensitivity;

• Fault direction is calculated phase-selectively and separately for phase faults ,

ground faults and summation current faults.

Dynamic Cold Load

Pick-up Function

50C, 50NC, 51C,

51NC, 67C, 67NC

• Dynamic changeover of time overcurrent protection settings, e.g. when cold load

conditions are anticipated;

• Detection of cold load condition via circuit breaker position or current threshold;

• Activation via automatic reclosure (AR) possible;

• Start also possible via binary input.

Single-Phase Over-

current Protection • Evaluation of the measured current via the sensitive or insensitive ground current

transformer;

• Suitable as dif ferential protection that includes the neutral point current on a trans-

former side, a generator side or a motor side or for a grounded reactor set;

• As tank leakage protection against illegal leakage currents between transformer

casing and grou n d.

Voltage Protection

27, 59 • T wo under voltage element s 27-1 and 27-2 measuring positive seq uence voltage or

the smallest of the applying voltages;

• Choice of current supervision for 27-1 and 27-2;

• T wo overvoltage ele ments 59-1 a nd 59-2 for sep arate detection of ove rvoltages for

the largest volt age applied ; in addition, de tection of the n egative sequence comp o-

nent;

• For a single-ph as e con n ec tio n, th e co nn ec te d sing le -p ha se pha se -t o- gr o un d or

phase-to-phase voltage is evaluated;

• settable dropout ratio for all elements of the under voltage and overvoltage protec-

tion.

Negative Sequen ce

Protection 46 • Evaluation of negative sequence component of the currents;

• Two definite-time elements 46-1 and 46-2 and one inverse-time element 46-TOC;

curves of common standards are available for 46-TOC.

1.3 Characteristics

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Motor Starting Pro-

tection 48 • Inverse time tripping characteristic based on an evaluation of the motor starting cur-

rent;

• Definite time delay for blocked rotor.

Motor Start Inhibit

66, 86 • Approximate replica of excessive rotor temperature;

• Startup is permitted only if the rotor has sufficient thermal reserves for a complete

startup;

• Disablin g of th e start inhibit is possib le if an eme r ge nc y startup is requir e d.

Frequency Protec-

tion 81 O/U • Monitoring on undersho oting (f<) and/or overshooting (f>) with 4 frequency limits

and delay times that are independently adjustable;

• Insensitive to harmonics and abrupt phase angle changes;

• Adjustable undervoltage threshold.

Thermal Overload

Protection 49 • Thermal profile of energy losses (overload protection has total memory capability);

• True r.m.s. calculation;

• Adjustable ther mal alarm level;

• Adjustable alarm level based on current magnitude;

• Additional time constant setting for motors to accommodate the motor at standstill;

• Integration of ambient temperature or coolant temperature is possible via external

temperature sensors and RTD-Box.

Monitoring Func-

tions • Availability of the device is greatly increased because of self-monitoring of the inter-

nal measurement circuits, power supply, hardware, and software;

• Current transformer and voltage transformer secondary circuits are monitored

using summa tio n and sym m et ry chec k tech n iqu e s

• Trip circuit monitoring;

• Phase rotation c he ck.

Ground Fault De-

tection 50N(s),

51N(s), 67N(s),

59N/64

• Displacement voltage is measured or calculated from the three phase voltages;

• Determination of a faulty phase on ungrounded or grounded networks;

• Two-element Ground Fault Detection: 50Ns-1 and 50Ns-2;

• High sensitivity (as low as 1 mA);

• Overcurrent element with definite time or inverse time delay;

• One user-defined and two logarithmic-inverse current/time curves are available for

inverse time O/C protection;

• Direction determination with zero-sequence quantities (I0, V0), wattmetric ground

fault direction determination;

• Any element can be set as directional or non-directional — forward sensing direc-

tional, or reve rse sensing directional;

• Directional characteristic can be adjustable;

• Optionally applicable as additional ground fault protection.

1 Introduction

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Intermittent Ground

Fault Protection • Detects and accumulates intermittent ground faults;

• Tripp in g after conf igu ra b le to tal time.

Automatic Reclos-

ing 79 • Single-shot or multi-shot;

• With separate dead times for the first and all succeeding shots;

• Protective elements that initiate automatic reclosing are selectable. The choices

can be dif ferent for phase faults and ground faults;

• Different programs for phase and ground faults;

• Interaction to time overcurr ent protection element and ground fault elements. They

can be blocked in dependence of the reclosing cycle or released instantaneously;

• Synchronous reclosing is possible (only 7SJ64) in conjunction with the integrated

synchronizing feature.

Fault Location • Initiation by trip command, external command or dropout of pickup;

• Fault distance is calcula ted a nd g ive n in secon dary ohm s and m iles, o r kilometr es.

Breaker Failure

Protection 50 BF • Checking current flow and/or evaluation of the circuit breaker auxiliary contacts;

• Initiated by the tripping of any integrated protective element that trips the circuit

breaker;

• Initiation possible via a binary input from an external protective device;

• Initiation possible via the integrated contr ol function.

Flexible Protection

Functions (7SJ64

only)

• Up to 20 protection functions which can be set individually to operate in three-phase

or single-phase mode;

• Any calculated or directly measured value can b e evaluated on principle;

• Standard protection logic function with definite time characteristic;

• Internal and configurable pickup and dropout delay;

• Modifiable message texts.

Synchronism and

Voltage Check 25

(7SJ64 only)

• V erification of th e synchronous conditions before reclosing after th ree-pole tripping;

• Fast measuring of the voltage difference ΔV, the phase angle dif ference Δϕ and the

frequency difference Δf;

• Alternatively, check of the de-energized state before reclosing;

• Switching possible for asynchronous system conditions with prediction of the syn-

chronization time;

• Settable minimum and maximum voltage;

• Verification of the synchronous conditions or de-energized state also possible

before the manual closing of the circuit breaker, with separate limit values;

• Measurement also possible via transformer without external intermediate matching

transformer;

• Measuring voltages optionally phase–to–phase or phase–to–ground.

1.3 Characteristics

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

RTD-Boxes • Detection of any ambient te mperatur es or coolan t temper atures by means o f R TD-

Boxes and external temperature sensors.

Phase Rotation • Selectable ABC or ACB by setting (static) or binary input (dynamic).

Circuit-Breaker

Maintenance • S t atistical methods to help adjust maintenance intervals for CB contacts according

to their actual wear;

• Several autonomous subfunctions are imlemented (ΣI procedure, ΣIx procedure

and 2P procedure); 7SJ64 also features the I2t pr oc ed u re );

• Acquisition and conditioning of measured values for all subfunctions operates

phase-selective using one procedure-specific threshold per subfunction.

User Defined Func-

tions • Internal and external signals can be logically combined to establish user-defined

logic functions;

• All common Boolean operations are available for programming (AND, OR, NOT, Ex-

clusive OR, etc. );

• Time delays and limit value interrogation;

• Processing of measured values, including zero suppression, adding a knee curv e

for a transducer input, and live-zero monitoring;

• CFC debugging via browser connection (7SJ64 only).

Breaker Control • Circuit breakers can be opened and closed via specific process control keys

(models with graphic displays only), the programmable function keys on the front

panel, via the system interface (e.g. by or SCADA), or via the front PC interface

using a person al co mp u te r with DIGS I) ;

• Circuit breakers are monitored via the breaker auxiliary contacts;

• Plausibility monitoring of the circuit breaker position and check of interlocking con-

ditions.

■

1 Introduction

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Functions

This chapter describe s the various functions of the SIPROTEC 4 device 7SJ62/63/64.

It shows the setting options to each function in maximum configuration and provides

information on how to determine the setting values and, if required, formulas.

The following information al so allows you to specify which of the available functions to

use.

2.1 General 36

2.2 Overcurrent Protection 50, 51, 50N, 51N 59

2.3 Directional Overcurrent Protection 67, 67N 87

2.4 Dynamic Cold Load Pickup 117

2.5 Single-Phase Overcurrent Protection 123

2.6 Voltage Protection 27, 59 134

2.7 Negative Sequence Protection 46 146

2.8 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66) 154

2.9 Frequency Protection 81 O/U 171

2.10 Thermal Overload Protection 49 175

2.11 Monitoring Functions 185

2.12 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 200

2.13 In termittent Ground Fault Protection 220

2.14 Automatic Reclosing System 79 228

2.15 Fault Locator 254

2.16 Br eaker Failure Protection 50BF 257

2.17 Flexible Protection Functions (7SJ64 only) 262

2.18 Reverse-Power Protection Application with Flexible Protection Function 274

2.19 Synchronism and Voltage Check 25 (7SJ64 only) 283

2.20 Temperature De te ctio n via RTD Boxes 301

2.21 Ph ase Rotation 310

2.22 Function Logic 312

2.23 Auxiliary Functions 314

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.24 Protection for Single-phase Voltage Transformer Connection 345

2.25 Breaker Control 350

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1 General

The settings associated with the various device functions can be modified using the

operating or service interface in DIGSI on a PC. Some parameters may also be

changed using the controls on the fro nt panel of the de vice. The detailed procedure is

described in the SIPROTEC 4 System /1/.

2.1.1 Functional Scope

The 7SJ62/63/64 relay contains p rotection functions as well as many other functions.

The hardware and firmware is designed for this scope of functions. Additionally, the

control functions can be matched to the system requirements. Individual functions can

be enabled or disabled during the configuration procedure. The interaction of functions

may also be modified.

2.1.1.1 Description

Configuration of

Functions Example for the configuration of functional scope:

A protected system consists of overhead lines and underground cables. Since auto-

matic reclosing is only needed for the overhead lines, the automatic reclosing function

is not configured or "Disabled" for the relays protecting the underground cables.

The available protection and additiona l functions must be configured as Enabled or

Disabled. For individual functions, a choice between several alternatives may be

presented, as described below.

Functions configured as Disabled are not processed by the 7SJ62/63/64 . There are

no messages, and corresponding settings (functions, limit values) are not queried

during configuration.

Note

Availabl e functions and default settings depen d on the ordering code of the r elay (see

A.1 for details).

2.1.1.2 Setting Notes

Setting of the F unc-

tional Scope Configuration settings can be entered using a PC and the software program DIGSI

and transferred via the fro nt serial port or th e rear service interf ace. The operation via

DIGSI is explaine d in the SIPR OT EC 4 Syst em Desc rip tio n.

For changing configuration parameters in the device, password no.7 is required (for

parameter set). Without the password, the settings may be read, but may not be mod -

ified and transm itted to the device.

The functional scope with the available optio ns is set in the Functional Scope dialog

box to match plant requirements.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Special Character-

istics Most settings are self-explanatory. However, special characteristics are described

below.

If the setting group chan ge function has to be used, add ress 103 Grp Chge OPTION

must be set to Enabled. In service, simple and fast change over between up to four

different groups of settings is possible Only one setting group may be selected and

used if this option is Disabled.

For the relay elements associated with non-directional overcurrent protection (sepa-

rately for phase and ground), various tripping characteristics may be selected at ad-

dresses 112 Charac. Phase and 113 Charac. Ground. If only the definite time

characteristic is desired, then Definite Time should be selected. Additionally, de-

pending on the rela y typ e or de re d , var i ous in ve rse time characte rist ics, ba se d on

either IEC (TOC IEC) standards or ANSI (TOC ANSI) standards, or user-defined

characteristic are available for selection. The dr opout behavior of the IEC and ANSI

characteristics will be specified later with settings (addresses 1210 and 1310), how-

ever, for the user-defined characteristic you determine in address 112 and 113

whether to specify only the pickup characteristic (User Defined PU) or the pickup

and the reset time characteristic (User def. Reset).

The superimposed high-current element 50-2 or 50N-2 is available in all these cases.

Time overcurrent protection can be disabled by setting the function to Disabled.

For directional overcurrent protection, the same information that was entered for the

non-directional overcu rrent p rotecti on ca n be en tered at addre sses 115 67/67-TOC

and 116 67N/67N-TOC.

For (sensitive) ground fault detection, address 131 Sens. Gnd Fault is used to

specify whether this function should be enabled with definite time tripping characteris-

tics (Definite Time), a User Defined PU and two logarithmic invers e character-

istics or disabled by setting to Disabled.

For the intermittent ground fault protection specify in address 133 INTERM.EF the

measured quantity (with Ignd, with 3I0 or with Ignd,sens.) which is to be

used by this protection function.

For negative sequence cur rent protection, address 140 46 is used to specify whether

the tripping characteristics should be Definite Time, TOC ANSI or TOC IEC, or

whether the function is to be Disabled.

Set in address 142 49 for the overload protection whether ( With amb. temp.) or

not (No ambient temp) the thermal replica of the overload protection will account

for a coolant temperature or ambient temperature or whether the entire function is set

to Disabled.

The flexible protective functions (only 7S64) ca n be configured in parameter

FLEXIBLE FUNC.. You can create max. 20 functions. This can be done by marking

(setting ticks) the functions (see example in Section 2.18). If the marking (the tick) of

a function is removed, all t he settings and allocations prev iously made are lost. All the

settings and locations are located in the default setting when a new marking of the

function takes place. The se tting of the flexible function is performed in DIGSI under „

Parameter“, „Additional Functions“ and„ Settings“. The allocation is performed, as

usually, under „Parameter“ an d „Allo ca tio n“.

Up to four function groups are available for the synchronizing function. They are

enabled in addre ss 01 6x (x = 1 ... 4). Par ame te rs 161 25 Function 1 to 164 25

Function 4 indicate whether a synchronizing function is to be Disabled or

Enabled. The latter is determined by selecting the operating mode ASYN/SYNCHRON

(closing takes place for asynchronous and synchronous conditions) or

SYNCHROCHECK (corresponds to the classical synchro-check function). The function

groups which are configur ed to be enabled via ASYN/SYNCHRON or SYNCHROCHECK

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

are displayed when you select the synchronizing function; function groups set to

Disabled are hidden.

When using the trip circuit monitoring, there is the possibility to select at address 182

74 Trip Ct Supv if the trip circuit monitoring should work with two (2 Binary

Inputs) or only with one bina y input (1 Binary Input) or if the function will be con-

figured as Disabled.

If you want to detect an ambient tem perat ure or a coolant te mpera ture and e.g. send

the information to the overload protection, specify in address 190 RTD-BOX INPUT

the port to which the RTD-box is connected. In 7SJ62/63/64 port C (service port) is

used for this purpose, fo r 7SJ64 either port C (service port) or port D (additional port).

The number and transmission type of the temperature detectors (RTD = Resistance

Temperature Detector) can be specified in address191 RTD CONNECTION: 6 RTD

simplex or 6 RTD HDX (with one RTD- box) or 12 RTD HDX (with two RT D-boxe s).

Implement ation examples are given in the Appendix (und er "Connection Examp les").

The settings in address 191 have to comply with those at the RTD-box (see Subsec-

tion 2.20.2, under „RTD-box Settings“).

Several options ar e available at addres s 172 52 B.WEAR MONIT for CB mainte-

nance. This does in no way affect the basic functionality of summation current forma-

tion (ΣI procedure), which does not require any additional settings and sums up the

tripping curren ts of the trips initiated by the pr ot ection function.

The ΣIx procedure creates the sum of all tripping current powers and displays them

as reference quantity. The 2P procedure continuously calculates the CB's r emaining

lifetime.

The I2t procedure is only implemented in the 7SJ64. It forms the squared tripping cur-

rrent integrals over the arcing time and displays them as reference quantity.

Section 2.23.3 provides mor e detailed information on CB maintenance procedures.

2.1.1.3 Settings

Addr. Parameter Setting Options Default Setting Comments

103 Grp Chge OPTION Disabled

Enabled Disabled Setting Group Change Option

104 OSC. FAULT REC. Disabled

Enabled Disabled Oscillographic Fault Records

112 Charac. Phase Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Definite Time 50/51

113 Charac. Ground Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Definite Time 50N/51N

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

115 67/67-TOC Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Definite Time 67, 67-TOC

116 67N/67N-TOC Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Definite Time 67N, 67N-TOC

117 Coldload Pickup Disabled

Enabled Disabled Cold Load Pickup

122 InrushRestraint Disabled

Enabled Disabled 2nd Harmonic Inrush Restraint

127 50 1Ph Disable d

Enabled Disabled 50 1Ph

131 Sens. Gnd Fault Disabled

Definite Time

User Defined PU

Log. inverse A

Log. Inverse B

Disabled (sensitive) Ground fault

133 INTERM.EF Disabled

with Ignd

with 3I0

with Ignd,sens.

Disabled Intermittent earth fault protection

140 46 Disabled

TOC ANSI

TOC IEC

Definite Time

Disabled 46 Negative Sequence Protection

141 48 Disabled

Enabled Disabled 48 Startup Supervision of Motors

142 49 Disabled

No ambient temp

With amb. temp.

Disabled 49 Thermal Overload Protection

143 66 #o f Starts Disabled

Enabled Disabled 66 Startup Counter for Motors

150 27/59 Disabled

Enabled Disabled 27, 59 Under/Overvoltage Protec-

tion

154 81 O/U Disable d

Enabled Disabled 81 Over/Underfrequency Protec-

tion

161 25 Fu nction 1 Disable d

ASYN/SYNCHRON

SYNCHROCHECK

Disabled 25 Function group 1

162 25 Fu nction 2 Disable d

ASYN/SYNCHRON

SYNCHROCHECK

Disabled 25 Function group 2

163 25 Fu nction 3 Disable d

ASYN/SYNCHRON

SYNCHROCHECK

Disabled 25 Function group 3

164 25 Fu nction 4 Disable d

ASYN/SYNCHRON

SYNCHROCHECK

Disabled 25 Function group 4

Addr. Parameter Setting Options Default Setting Comments

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

170 50BF Disabled

Enabled Disabled 50BF Breaker Failure Protection

171 79 Auto Recl. Disabled

Enabled Disabled 79 Auto-Reclose Functio n

172 52 B.WEAR MONIT Disabled

Ix-Method

2P-Method

I2t-Method

Disabled 52 Breaker Wear Monitoring

180 Fault Locator Disabled

Enabled Disabled Fault Locator

182 74 Trip Ct Supv Disabled

2 Binary Inputs

1 Binary Input

Disabled 74TC T rip Circuit Supervision

190 RTD-BOX INPUT Disabled

Port C Disabled External Temperature Input

191 RTD CONNECTION 6 RTD simplex

6 RTD HDX

12 RTD HDX

6 RTD simplex Ext. Temperature Input Connec-

tion Type

- FLEXIBLE FUNC. 1..20 Flexible Function 01

Flexible Function 02

Flexible Function 03

Flexible Function 04

Flexible Function 05

Flexible Function 06

Flexible Function 07

Flexible Function 08

Flexible Function 09

Flexible Function 10

Flexible Function 11

Flexible Function 12

Flexible Function 13

Flexible Function 14

Flexible Function 15

Flexible Function 16

Flexible Function 17

Flexible Function 18

Flexible Function 19

Flexible Function 20

Please select Flexible Functions

Addr. Parameter Setting Options Default Setting Com ments

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.2 Device, General Settings

The device requires some general infor mation. This may be, for example, the type of

annunciation to be issued in the event a power system fault occurs.

2.1.2.1 Description

Command-depen-

dent Annunciations

"No Trip – No Flag"

The indication of messages masked to local LEDs, and the m aintenance of spontan e-

ous messages, can be made dependent on whethe r the device has issued a trip

signal. This information is the n not output if durin g a system disturba nce one or more

protection fun ct i on s ha ve pi cke d up, bu t no tripp in g by th e 7SJ 62 /6 3/ 64 res ult ed

because the fault was cleared by a different device (e.g. on another line). These mes-

sages are then limited to faults in the line to be protected.

The following figure illustrates the creation of the reset command for stored messages.

When the relay drop s off, st ationary conditions (f ault display Target on PU / Target on

TRIP; Trip / No Trip) decide whether the new fault will be stored or reset.

Figure 2-1 Creation of the reset command for the latched LED and LCD messages

Spontaneous An-

nunciations on the

Display

You can determine whether or no t the most important dat a of a fault event is displayed

automatically after the fault has occur red (s ee also Secti on „Fau lt Event s“ in Ch apter

„Additional Functions“).

2.1.2.2 Setting Notes

Fault Messages Pickup of a new protective function generally resets any previously set LED indica-

tions, so that only the latest fault is displayed at any time. It can be selected whether

the stored LED displays and the spont a neous messa ges on th e disp lay appea r upon

renewed pickup, or only after a renewed trip signal is issued. In order to select the

desired mode of display, select the submenu Device in the SETTINGS menu. The two

alternatives 610 or FltDisp.LED/LCD („No trip – no flag“) are selected at address

Target on PU Target on TRIP.

For devices with graphic display use parameter 611 Spont. FltDisp. to specify

whether (YES) or not (NO) a spontaneous fault message will appear automatically on

the display. For devices with text display such messages will appear after a system

fault by any means.

Selection of Default

Display Devices featuring 4-line display provide a number of predefined display pages. The

start pa ge of the default display, which will open after device st ar tup, can be selected

via parameter 640 Start image DD The available display pages ar e listed in the

Appendix A.5.

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.2.3 Settings

2.1.2.4 Information List

Addr. Parameter Setting Options Default Setting Com ments

610 FltDisp.LED/LCD Target on PU

Target on TRIP Target on PU Fault Display on LED / LCD

611 Spont. FltDisp. YES

NO NO Spontaneous display of flt.annun-

ciations

640 Start image DD image 1

image 2

image 3

image 4

image 5

image 6

image 1 Start image Default Display

No. Information Type of In-

formation Comments

- >Light on SP >Back Light on

- Reset LED IntSP Reset LED

- DataStop IntSP Stop data transmission

- Test mode IntSP Test mode

- Feeder gnd IntSP Feeder GROUNDED

- Brk OPENED IntSP Breaker OPENED

- HWTestMod IntSP Hardware Test Mode

- SynchClock IntSP_Ev Clock Synchronization

- Error FMS1 OUT Error FMS FO 1

- Error FMS2 OUT Error FMS FO 2

- Distur.C FC OUT Disturbance CFC

1 Not configured SP No Function configured

2 Non Existent SP Function Not Available

3 >Time Synch SP_Ev >Synchronize Internal Real Time Clock

5 >Reset LED SP >Reset LED

15 >Test mode SP >Test mo de

16 >DataStop SP >Stop data transmission

51 Device OK OUT Device is Operational and Protecting

52 ProtActive IntSP At Least 1 Protection Funct. is Active

55 Reset Device OUT Reset Device

56 Initial Start OUT Initial Star t of Device

67 Resume OUT Resume

68 Clock SyncError OUT Clock Synchronization Error

69 DayLightSavTime OUT Daylight Saving Time

70 Settings Calc. OUT Setting calcul ation is running

71 Settings Check OUT Settings Check

72 Level-2 change OUT Level-2 change

73 Local change OUT Local setting change

110 Event Lost OUT_Ev Event lost

113 Flag Lost OUT Flag Lost

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

125 Chatter ON OUT Chatter ON

140 Error Sum Alarm OUT Error with a summary alarm

144 Error 5V OUT Error 5V

145 Error 0V OUT Error 0V

146 Error -5V OUT Error -5V

147 Error PwrSupply OUT Error Power Supply

160 Alarm Sum Event OUT Alarm Summary Event

177 Fail Battery OUT Failure: Battery empty

178 I/O-Board error OUT I/O-Board Error

183 Error Board 1 OUT Error Board 1

184 Error Board 2 OUT Error Board 2

185 Error Board 3 OUT Error Board 3

186 Error Board 4 OUT Error Board 4

187 Error Board 5 OUT Error Board 5

188 Error Board 6 OUT Error Board 6

189 Error Board 7 OUT Error Board 7

191 Error Offset OUT Error: Offset

192 Error1A/5Awrong OUT Error:1A/5Ajumper different from setting

193 Alarm NO calibr OUT Alarm: NO calibration data available

194 Error neutralCT OUT Error: Neutral CT different from MLFB

220 CT Ph wrong OUT Error: Range CT Ph wrong

301 Pow.Sys.Flt. OUT Power System fault

302 Faul t Event OUT Faul t Event

303 sens Gnd flt OUT sensitive Ground fault

320 Warn Mem. Dat a OUT Warn: Limit of Memory Data exceeded

321 Warn Mem. Para. OUT W a rn: Limit of Memory Parameter exceeded

322 Warn Mem. Oper. OUT Warn: Limit of Memory Ope ra t i o n exceeded

323 Warn Mem. New OUT Warn: Limit of Memory New exceeded

502 Relay Drop Out SP Relay Drop Out

510 Relay CLOSE SP General CLOSE of relay

No. Information Type of In-

formation Comments

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.3 Power System Data 1

2.1.3.1 Description

The device requires cert ain basic dat a regarding the protected equ ipment, so that the

device can adapt to its desired application. These may be, for instance, nominal power

system and transformer data, mea sured quantity polarities and their ph ysical connec-

tions, breaker properties (where applicable) etc. There are also certain parameters

that are common to all functions, i.e. n ot associated with a specific protection, control

or monitoring function. The following section discusses these data.

2.1.3.2 Setting Notes

General This data can be entered directly on the device featuring an integrated or detached

operator p anel for p arameter s 209 PHASE SEQ., 210 TMin TRIP CMD, 211 TMax

CLOSE CMD and 212 BkrClosed I MIN. Select the MAIN MENU by pressing the

MENU key. Press the ▼ key to select SETTINGS and the X key to navigate to the set-

tings selection. To obtain the Power System Data display, select the P.System Data

1 in the SETTINGS menu.

In DIGSI double-click on Settings to display the relevant selection. A dialog box will

open under the optio n P.System Data 1 with the tabs Power system, CTs, VTs and

Breaker where you can configure the individual parameters. Thus the following Sub-

sections are structured accordingly.

Nominal Frequency The rated system frequency is set at address 214 Rated Frequency. The factory

presetting in accordance with the model number must only be chan ged if the device

will be employed for a purpose other than that which was planned when ordering.

Phase Rotation Re-

versal Address 209 PHASE SEQ. is used to change the default phase sequ ence (A B C for

clockwise rotation), if your power system permanently has an anti-clockwise phase se-

quence (A C B). A temporary reversal of rot a tion is also possible using binar y input s

(see Section 2.21.2).

Temperature Unit Address 276 TEMP. UNIT allows you to display the temperature values either in

degree Celsius or in degree Fahrenheit.

Polarity of Current

Transformers At address 201 CT Starpoint, the polarity of the wye-connected current transform-

ers is specified (the following figure a pplies correspondingly for two curren t transform-

ers). This setting dete rmines the measur ing direction of the device (for wards = line di-

rection). Modifying this setting also results in a polarity reversal of the ground current

inputs IN or INS.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-2 Polarity of current transformers

Voltage Connection Address 213 specifies how the voltage transformers are connected. VT Connect.

3ph = Van, Vbn, Vcn means that three phase volt ages in wye-co nnection are con-

nected, VT Connect. 3ph = Vab, Vbc, VGnd signifies that two phase-to-phase

voltages (V -connection) and VN are connected. The latter setting is also selected when

only two phase-to-phase voltage transformers are utilized or when only the displaced

voltage (zero sequence voltage) is connected to the device.

Device 7SJ64 contains 4 voltage measuring inputs which enable further options

besides the above-mentioned connection types: VT Connect. 3ph =

Van,Vbn,Vcn,VGn is selected if the three phase volt ages in wye-connection and VN

are connected to the fou rth vo ltage input of the device. Select VT Connect. 3ph =

Van,Vbn,Vcn,VSy in case the fourth voltage input is used for the synchronizing

function even if two phase-to-phase voltages (V-connection) are available on the

primary side (since the voltages are connected to the device such that the device mea-

sures phase-ground voltage s under symmetrical conditions).

Note

If the synchronization function is used for the connectio n to two-phase-to-phase volt-

ages in V-connection (see above), the device cannot determine a zero sequence volt-

age. The function „Directional Time Overcurrent Ground Protection“, „Directional

Ground Fault Detection“ and „Fuse-Failure-Monitor (FFM)“ must be disabled.

Parameter 240 VT Connect. 1ph is set to specify that only one voltage transformer

is connected to the devices. In this case the user defines which primary voltage is con-

nected to which analog inpu t. If one of the available volt ages is selected, i.e. a setting

unequal NO, setting of address 213 is no more relevant. Only address 240 is to be set.

If parameter 240 VT Connect. 1ph is set to NO on the other hand, p ar ame te r 213

will apply.

With 7SJ64 and single-phase voltage transformer connection the voltage connected

to voltage input V4 is always interpreted as the voltage which is to be synchronized.

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Distance Unit Address 215 Distance Unit corresponds to the unit of le ngth (km or Miles) appli-

cable to fault locating. If a fault locator is not included with the device, or if the fault

locating function is disabled, this setting has no effect on operation of the device.

Changing the length unit will not result in an automatic conversion between the sys-

tems. Such conversions must be enter ed at the appropriate addresses.

ATEX100 Address 235 ATEX100 allows that the requirements for the protection of explosion-

protected motors with regard to thermal profiles is fulfilled. Set this parameter to YES

to save all thermal r eplicas of devices 7SJ62/63/64 in the event of a power su pply fail-

ure. After the supply voltage is restored the thermal profiles will resume operation

using the stored values. Set the para meter to NO to reset the calculated overtempera -

tures of all thermal profiles to zero if the power supply fails.

Two-phase Time

Overcurrent Pro-

tection (Power

System Data)

Two-phase time overcurrent protection is used in isolated or resonant-grounded

systems where three-phase devices are desir ed to coact with existing two-ph ase pro-

tection equipmen t. Parameter 250 50/51 2-ph prot can be set to specify whether

the overcurrent protection operates in two or three phases. If set to ON, threshold com-

parison uses always the value 0A instead of the measured value for IB, so that phase

B can not initiate a pick-up. All other functions operate however in three phases.

Ground Fault Pro-

tection With address 613 Gnd O/Cprot. w. define whether ground fault protection either

is to operate using measured values (Ignd (measured)) or the quantities calculated

from the thre e ph as e cu rre n ts (3I0 (calcul.)). In the first case, the measured

quantity at the fourth current input is evaluated. In the latter case, the summation

current is calcu lated fr om the three pha se curr ent input s . If the device fea tures a sen-

sitive ground curr en t inp ut (me a sur in g ra ng e starts at 1 mA), the grou n d fau lt pr otec-

tion always uses the calculated quantity 3I0. In this cas e, parameter 613 Gnd

O/Cprot. w. is not available.

Voltage Protection

(Switchover of

Characteristic

Values)

With three-phase con nection , the fundam ental harmonic component of the largest of

the three phase-to -phase voltages (Vphph) is supplied to the overvoltage protection

elements, or the negative sequence voltage (V2). With three-phase connection, und-

ervolt age p ro tectio n relie s ei th er on the p ositive seq uen ce voltage V1 or the smallest

of the phase-to-phase voltages Vphph. These specifications can be configured via pa-

rameter 614 OP. QUANTITY 59 and 615 OP. QUANTITY 27. If volt age transform-

ers are connecte d single-phase, there is a direct comp arison of measured value s and

thresholds, and the setting of characteristic values switchover is ignored.

Nominal Values of

Current Transform-

ers (CTs)

At addresses 204 CT PRIMARY and 205 CT SECONDARY, information is entered re-

garding the primary and secondary ampere ratings of the current transformers. It is im-

portant to ensure that the rated secondary current of the current transformers matches

the rated current of the device, otherwise the device will incorrectly calculate primary

data. At addresses 217 Ignd-CT PRIM and 218 Ignd-CT SEC, information is

entered regarding the primary and secondary ampe re rating of the current transform-

ers. In case of normal connection (st arpoint current connected to IN–transformer) 217

Ignd-CT PRIM and 204 CT PRIMARY must be set to the same value.

If the device features a sensitive ground current input, address 218 Ignd-CT SEC is

set to 1 A. In this case setting cannot be changed.

Nominal Values of

Volt age Transform-

ers (VTs)

At addresses 202 Vnom PRIMARY and 203 Vnom SECONDARY, information is entered

regarding the primary nominal voltage and secondary nominal voltage (phase-to-

phase) of the connected voltage transformers.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Transformation

Ratio of Voltage

Transformers (VTs)

In address 206 Vph / Vdelta the adjustment factor betwee n phase voltage a nd dis-

placement voltage is commu nicated to the device. This information is relevant for the

detection of ground faults (in grounded systems and non-grounded systems), opera-

tional measured value VN and measured-quantity monitoring.

If the voltage transformer set provides open de lta windings, an d if these windings are

connected to the device, this must be specified accordingly in address 213 (see above

margin heading "V olt age Connection"). Since the voltage transformer ratio is normally

as follows:

The factor Vph/VN (secon dary voltage, a ddress 206 Vph / Vdelta) has the relation

to 3/ √3 = √3 = 1.73 which must be used if the VN voltage is connected. For other trans-

formation ratios, i.e. the formation of the displacement voltage via an interconnected

transformer set, the factor must be correcte d ac co rd ing ly.

Please take into consideration that also the calculated secondary VN-voltage is divided

by the value set in address 206 Vph / Vdelta. Thus, even if the VN-voltage is not

connected, address 206 Vph / Vdelta has an impact on the secondary operational

measured value VN.

Trip and Close

Command Dura-

tion (CB)

Address 210 TMin TRIP CMD is used to set the minimum time the tripping cont acts

will remain closed. This setting applies to all protective functions that initiate tripping.

Address 211 TMax CLOSE CMD is used to set the maximum time the closing cont acts

will remain closed. This setting applies to the integrated reclosing function This setting

must be long enough to allow the circuit breaker contacts to reliably en gage. An ex-

cessive duration causes no problem since the closing command is interrupted in the

event anothe r tr ip is initia ted by a pr ot ect i ve func tion.

Current Flow Moni-

toring (CB) Address 212 BkrClosed I MIN corresponds to the threshold value of the integrated

current flow monitoring system. This parameter is used by several protection functions

(e.g. voltag e protectio n with curr ent criteri on, br ea ker failur e pr otection, over loa d pr o-

tection, restart inhibit for motors and CB maintenance). If the configured current value

exceeds the setting, the circuit-breaker is considered closed.

The threshold value setting applies to all three phases, and must take into consider-

ation all used protective functions.

With regard to breaker failure pr otection, the threshold value must be set at a level

below the minimum fault current for which breaker failure protection must operate. A

setting of 10% below the minimum fault current for which breaker failure protection

must operate is recommended. The pickup value should not be set too low , otherwise,

the danger exists that transients in the current transformer secondary circuit could lead

to extended drop out times if extremely high currents are switched off.

When using the device for motor protection, overload protection and restart inhibit, the

protective relay can distinguish between a running motor and a stopped motor, as well

as take into account the dif ferent motor cool-down beha viour. For this application, the

set value must be lower than the minimum no-load current of the motor.

Circuit Break er

Maintenance (CBM) Parameters 260 to 267 are assigned to CB maintenance. The parameters and the dif-

ferent procedures are explained in the setting notes of this function (see Section

2.23.3).

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.3.3 Settings

Addresses which have an appended "A" can only be changed with DIGSI, under "Dis-

play Additional Settings".

The table indicates region-specific default settings. Column C (configuration) indicates

the corresponding secondary nominal current of the current transformer.

Addr. Parameter C Setting Options Default Setting Comments

201 CT Starpoint towards Line

towards Busbar towards Line CT Starpoint

202 Vnom PRIMARY 0.10 .. 800.00 kV 12.00 kV Rated Primary Voltage

203 Vnom SECONDARY 100 .. 225 V 100 V Rated Secondary Voltage

(L-L)

204 CT PRIMARY 10 .. 50000 A 100 A CT Rated Primary Current

205 CT SECONDARY 1A

5A 1A CT Rated Secondary

Current

206A Vph / Vdelta 1.00 .. 3.00 1.73 Matching ratio Phase-VT

To Open-Delta-VT

209 PHASE SEQ. A B C

A C B A B C Phase Sequence

210A TMin TRIP CMD 0.01 .. 32.00 sec 0.15 sec Minimum TRIP Command

Duration

211A TMax CLOSE CMD 0.01 .. 32.00 sec 1.00 sec Maximum Close

Command Duration

212 BkrClosed I MIN 1A 0.04 .. 1.00 A 0.04 A Closed Breaker Min.

Current Threshold

5A 0.20 .. 5.00 A 0.20 A

213 VT Connect. 3ph Van, Vbn, Vcn

Vab, Vbc, VGnd

Van,Vbn,Vcn,VGn

Van,Vbn,Vcn,VSy

Van , Vbn, Vcn VT Connection, three-

phase

214 Rated Frequency 50 Hz

60 Hz 50 Hz Rated Frequency

215 Distance Unit km

Miles km Distance measurement

unit

217 Ignd-CT PRIM 1 .. 50000 A 60 A Ignd-CT rated primary

current

218 Ignd-CT SEC 1A

5A 1A Ignd-CT rated secondary

current

235A ATEX100 NO

YES NO Storage of th. Replicas w/o

Power Supply

240 VT Connect. 1ph NO

Van

Vbn

Vcn

Vab

Vbc

Vca

NO VT Connection, single-

phase

250A 50/51 2-ph prot ON

OFF OFF 50, 51 Time Overcurrent

with 2ph. prot.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.3.4 Information List

260 Ir-52 10 .. 50000 A 125 A Rated Normal Current (52

Breaker)

261 OP.CYCLES AT Ir 100 .. 1000000 10000 Switching Cycles at Rated

Normal Current

262 Isc-52 10 .. 100000 A 25000 A Rated Short-Circuit Break-

ing Current

263 OP.CYCLES Isc 1 .. 1000 50 Switch. Cycles at Rated

Short-Cir. Curr.

264 Ix EXPONENT 1.0 .. 3. 0 2.0 Exponent for the Ix-

Method

265 Cmd.via control (Setting options depend

on configuration) None 52 B.Wear: Open Cmd. via

Control Device

266 T 52 BREAKTIME 1 .. 600 ms 80 ms Breaktime (52 Breaker)

267 T 52 OPENING 1 .. 500 ms 65 ms Opening Time (52 Break-

er)

276 TEMP. UNIT Celsius

Fahrenheit Celsius Unit of temperature mea-

surement

613A Gnd O/Cprot. w. Ignd (measured)

3I0 (calcul.) Ignd (measured) Ground Overcurrent pro-

tection with

614A OP. QUANTITY 59 Vphph

V2 Vphph Opera. Quantity for 59 Ov-

ervolt. Prot.

615A OP. QUANTITY 27 V1

Vphph V1 Opera. Quantity for 27 Un-

dervolt. Prot.

No. Information Type of In-

formation Comments

5145 >Reverse Rot. SP >Reverse Phase Rotation

5147 Rotation ABC OUT Phase rotation ABC

5148 Rotation ACB OUT Phase rotation ACB

Addr. P arameter C Setting Options Def ault Setting Comments

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.4 Oscillographic Fault Records

The Multi-Functional Protection with Control 7SJ62/63/64 is equipped with a fault

record mem or y. The instantaneous values of the me asured quantitie s

iA, iB, iC, iN or iNS and vA, vB, vC, vN or 3 · v0 and vSYN (only 7SJ64)

(voltages in accordance with connection) are sampled at intervals of 1.25 ms (for

50Hz) and stored in a circulating buffer (16 samples per cycle). For a fault, the data

are stored for an adju stable peri od of tim e, but no t mo re tha n 5 se co nd s (up to 20

seconds for 7SJ64). Up to 8 fault records can be recorded in this buffer. The fault

record memor y is automatically u pdated with every new fault, so no acknowledgment

for previously recorded faults is required. The fault record buffer can also be started

with protec tio n pick up , via bin a ry inp u t and s eri al po rt .

2.1.4.1 Description

The data can be retrieved via the serial interfaces by means of a personal computer

and evaluated with the protection da ta processing program DIGSI and the graphic

analysis software SIGRA 4. The latter graphically represents the data recorded during

the system fault and also calculates additional information from the measured values.

Currents and voltages can be presented as desired as prima ry or secondary values.

Signals are additionally recorded as binary tracks (marks) e.g. "pickup", "trip".

If the device has a serial system interface, the fau lt r e cor ding data can be passed on

to a central device via th is inte rface. T he eval uation of the dat a is do ne by applicable

programs in the central device. Currents and voltages are referred to their maximum

values, scaled to their rated values and prepared for graphic representation. Binary

signal traces (marks) of particular events e.g. ”fault detection", ”trip ping" are also rep-

resented.

In the event of transfer to a central device, the request for data transfer can be exe-

cuted automatically and ca n be selected to take place after each fault detection by the

protection, or only after a trip.

2.1.4.2 Setting Notes

Configuration Fault recording (waveform capture) will only t ake place if address 104 OSC. FAULT

REC. is set to Enabled. Other settings pertaining to fault recording (waveform cap-

ture) are found under the Osc. Fault Rec. submenu of the SETTINGS menu. It

has to be distinguish for the fault recording between the trigger and the recording cri-

terion (address 401 WAVEFORMTRIGGER). Normally the trigger is the pickup of a pro-

tective element, i.e. when a protective elem ent picks up the time is 0. The criteri on for

saving may be both the device pi ckup (Save w. Pickup) or the device trip (Save

w. TRIP). A trip command issued by the device can also be used as trigger (Start

w. TRIP); in this case it is also the recording criterion.

A fault event starts with the pickup by any protective function and ends when the last

pickup of a protective function has dropped out. Usually this is also the extent of a fault

recording (add re ss 402 WAVEFORM DATA = Fault event). If automatic reclosures

are performed, the entire network fault — or with more automatic reclosures — can be

recorded up to a final clearing (address 402 WAVEFORM DATA = Pow.Sys.Flt.).

This facilitates the represent ation of the entire system fault history , but also consumes

storage cap acity during the auto-reclosure dead time(s).

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The actual storage time encompasses the pre-fault time PRE. TRIG. TIME (address

404) ahead of the reference inst ant, the normal recording time and the post-fault time

POST REC. TIME (address 405) after the storage criterion has reset. The maximum

length of a fault record MAX. LENGTH is entered in Address 403. The saving of each

fault record must not exceed five seconds. A total of 8 records can be saved. However ,

the total length of time of all fault records in th e bu ffer may not excee d 5 second s.

An oscillographic record can be triggered by a change in status of a binary input, or

through the operating inte rface via PC. Storage is then triggered dynamically. The

length of the fault recording is set in address 406 BinIn CAPT.TIME (maximum

length however is MAX. LENGTH, address 403). Pre-fault and post-fault times will be

included. If the binary input time is set for ∞, then the length of the record equals the

time that the bina ry input is activated (st atic), or the MAX. LENGTH setting in address

403, whichever is shorter.

2.1.4.3 Settings

2.1.4.4 Information List

Addr. Parameter Setting Options Default Setting Comments

401 WAVEFORMTRIGGE

RSave w. Pickup

Save w. TRIP

Start w. TRIP

Save w. Pickup Waveform Capture

402 WAVEFORM DATA Fault event

Pow.Sys.Flt. Fault event Scope of Waveform Data

403 MAX. LENGTH 0.30 .. 5.00 sec 2.00 sec Max. length of a Waveform

Capture Record

404 PRE. TRIG. TIME 0.0 5 .. 0.50 sec 0.25 sec Captured Waveform Prior to

Trigger

405 POST REC. TIME 0.05 .. 0.50 sec 0.10 sec Captured Waveform after Event

406 BinIn CAPT.TIME 0 .10 .. 5.00 sec; ∞0.50 sec Capture Time via Binary Input

No. Information Type of In-

formation Comments

- FltRecSta IntSP F ault Recording Start

4 >Trig.Wave.Cap. SP >Trigger Waveform Capture

203 Wave. deleted OUT_Ev Waveform data deleted

30053 Fault rec. run. OUT Fault recording is running

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.5 Settings Groups

Four independent setting groups can be created for establishing the device's function

settings.

Applications • Setting groups enables the user to save the corresponding settings for each appli-

cation so that they can be quickly called when required. All setting groups are stored

in the relay. Only one setting group may be active at a given time.

2.1.5.1 Description

Changing Setting

Groups During operation the user can switch back and fourth between setting groups locally,

via the operato r panel, binary inputs (if so configured), the service interface using a

personal computer , or via the system interface. For reasons of safety it is not possible

to change between setting groups during a power system fault.

A setting group includes th e setting values for all functions that have been selected as

Enabled during configuration (see Section 2.1.1.2). In 7SJ62/63/64 devices, four in-

dependent setting groups (A to D) are available. Whereas setting values may vary , the

selected functions of each setting group remain the same.

2.1.5.2 Setting Notes

General If multiple setting groups are not required, group A is the default selection. Then, the

rest of this section is not applicable.

If multiple setting groups are desired, address Grp Chge OPTION must be set to

Enabled (addre ss 103). For the setting of the function parameters, you configure

each of the requ ired setting group s A to D, on e after the othe r . A maximum of 4 is pos-

sible. Please refer to the SIPROTEC 4 System Description, to learn how to copy

setting group s or reset them to their status a t delivery and also what yo u have to do to

change from one setting group to another.

Subsection 3.1 of this manual tells you how to ch ange between several setting groups

externally via binary inputs.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.5.3 Settings

2.1.5.4 Information List

Addr. Parameter Setting Options Default Setting Comments

302 CHANGE Group A

Group B

Group C

Group D

Binary Input

Protocol

Group A Chan ge to Another Setting Group

No. Information Type of In-

formation Comments

- Group A IntSP Group A

- Group B IntSP Group B

- Group C IntSP Group C

- Group D IntSP Group D

7 >Set Group Bit0 SP >Setting Group Select Bit 0

8 >Set Group Bit1 SP >Setting Group Select Bit 1

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.6 Power System Data 2

2.1.6.1 Description

The general protection data (P.System Data 2) includes settings associated with

all functions rather than a spec ific protection or moni toring fu nction. In cont rast to the

P.System Data 1 as discussed before, they can be changed over with the setting

groups.

Applications If the primary re ference voltage and the primary reference current of the protected

object are set, the device is able to calculate and output the percentage op erational

measured values.

For protection of motors th e motor st arting detection represents a n import ant feature.

Exceeding a configured current value serves as a criterion.

2.1.6.2 Setting Notes

Definition of

Nominal Rated

Values

At addresses 1101 FullScaleVolt. and 1102 FullScaleCurr., the primary ref-

erence voltage (phase-to-phase) and referen ce current (phase) of the protected

equipment is entered (e.g. motors). If these reference values match the primary VT

and CT rating, they correspond to the settings in address 202and 204 (Subsection

2.1.3.2). They are generally used to show values referenced to full scale.

Ground Impeda nce

Ratios (only for

Fault Location)

The ground impedance ratio is only relevant for line fault location. At addr ess 1103,

resistance ratio RG/RL Ratio is entered, and at address 1104, the reactance ratio

XG/XL Ratio is entered. They are calculated separately, and do not correspond to

the real and imaginary compo nents of Z0/Z1. Therefore, no complex calculations are

necessary! The ratios are obtained from system data using the following formula:

Where

R0– Zero sequence resistance of the line

X0 – Zero sequence reactance of the line

R1 – Positive sequence resistance of the line

X1 – Positive sequence reactance of the line

These values may either apply to the entire line length or be based on a per unit of line

length, as the qu o tien ts are indepe nd e nt of leng th .

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Calculation Example:

20 kV overhead line 120 mm2 with the following data:

R1/s = 0.39 Ω/mile Positive sequence resistance

X1/s = 0.58 Ω/mile Positive sequence reactance

R0/s = 1.42 Ω/mile Zero sequence resistance

X0/s = 2.03 Ω/mile Zero sequence reactance

For ground impedance ratios, the following result:

These values are se t at ad dr es se s 1103 and 1104 respectively.

Reactance Setting

(only for Fault Lo-

cation)

The reactance setting must only be entered if using the line fault location function. The

reactance setting enables the protective relay to indicate the fault location in terms of

distance.

The reactance value X' is entered as a value x' at address 1105 in Ω per mile if set

to distance unit Miles (address 215, see Section 2.1.3.2 "Distance Unit") , or at

address 1106 in Ω per kilometer if set to distance unit km. If the setting of address 215

is modified after entry of a reactance value at address 1105 or 1106, the reactance

value must be modified and reentered accordingly.

When using the PC a nd DIGSI for configuration , these values can also be entered as

primary values. The following conversion to secondary values is then not relevant.

For calculation of pr imary values in terms of secondary values th e following applies in

general:

Likewise, the following goes for the reactance setting of a line:

with

NCTR — Current transformer ratio

NVTR — Voltage transformer ratio

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Calculation Example:

In the following, the same line as used in the example for ground impedance ratios

(above) and additional data on the voltage transformers will be used:

Current transformer 500 A / 5 A

Voltage transformer 20 kV / 0.1 kV

The secondary reactance value is calculated as follows:

Recognition of

Running Condition

(only for motors)

When the configured current value at Address 1107 I MOTOR START is exceeded,

this will be interpreted as motor starting. This parameter is used by the start-up time

monitoring and overload protection functions.

For this setting the following should be considered:

• A setting must be selected that is lower than the actual motor start-up current under

all load and voltage conditions.

• During motor start-up the thermal profile of the overload protection is "frozen" i.e.,

kept at constant level. This threshold should not be set unnecessarily low since it

limits the operating range of the overload protection for high currents during opera-

tion.

Inversion of Mea-

sured Power Values

/ Metered Va lues

The directional values (power, power factor, work and related min., max. and mean

values), calculated in the operational measured values, are usually defined with pos-

itive direction towards the protected object. This requires that the connection polarity

for the entire device was configur ed accordingly in the P.System Data 1 (compare

also "Polarity of Current Transformers", address 201). It is also possible to apply dif-

ferent settings to the “forward“ direction for the protective functions and the positive

direction for the power etc., e.g. to have the active power supply (from the line to the

busbar) displayed p ositively. To do so, set address 1108 P,Q sign to reversed. If

the setting is not reversed (default), the positive direction for the power etc. corre-

sponds to the “forward“ direction for the protective functions. Chapter 4 provides a de-

tailed list of the values in question.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.6.3 Settings

The table indicates region-specific default settings. Column C (configuration) indicates

the corresponding secondary nominal current of the current transformer.

2.1.6.4 Information List

Addr. P arameter C Setting Options Def ault Setting Comments

1101 FullScaleVolt. 0.10 .. 800.00 kV 12.00 kV Measurem:FullScaleVolt-

age(Equipm.rating)

1102 FullScaleCurr. 10 .. 50 000 A 100 A Measurem:FullScaleCur-

rent(Equipm.rating)

1103 RG/RL Ratio - 0.33 .. 7.00 1.00 RG/RL - Ratio of Gnd to

Line Resistance

1104 XG/XL Ratio -0.33 .. 7.00 1.00 XG/XL - Ratio of Gnd to

Line Reactance

1105 x' 1A 0.0050 .. 15.0000 Ω/mi 0.2420 Ω/mi x' - Line Reactance per

length unit

5A 0.0010 .. 3.0 000 Ω/mi 0.0484 Ω/mi

1106 x' 1A 0.0050 .. 9.5000 Ω/km 0.1500 Ω/km x' - Line Reactance per

length unit

5A 0.0010 .. 1.9 000 Ω/km 0.0300 Ω/km

1107 I MOTOR START 1A 0.40 .. 10.00 A 2.50 A Motor Start Current (Block

49, Start 48)

5A 2.00 .. 50.00 A 12.50 A

1108 P,Q sign not reversed

reversed not reversed P,Q operational measured

values sign

No. Information Type of In-

formation Comments

126 ProtON/OFF IntSP Protection ON/OFF (via system port )

356 >Manual Close SP >Manual close signal

501 Relay PICKUP OUT Relay PICKUP

511 R elay TRIP OUT Relay GENERAL TRIP command

533 Ia = VI Primary fault current Ia

534 Ib = VI Primary fault current Ib

535 Ic = VI Primary fault current Ic

561 Man.Clos.Detect OUT Manual close signal detected

2720 >Enable ANSI#-2 SP >Enable 50/67-(N)-2 (override 79 blk)

4601 >52-a SP >52-a contact (OPEN, if bkr is open)

4602 >52-b SP >52-b contact (OPEN, if bkr is closed)

16019 >52 Wear sta rt SP >52 Breaker Wear Start Criteria

16020 52 WearSet.fail OUT 52 Wear blocked by Time Setting Failure

16027 52WL.blk I PErr OUT 52 Breaker Wear Logic blk Ir-CB>=Isc-CB

16028 52WL.blk n PErr OUT 52 Breake r W.Log.blk SwCyc.Isc>=SwCyc.Ir

2.1 General

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.1.7 EN100-Module

2.1.7.1 Functional Description

The EN100-Module enables integration of the 7SJ62/ 63/64 in 100-MBit communica -

tion networks in control and automation systems with the protocols according to IEC

61850 standard. This standard permits continuous communication of the devices

without gateways an d protocol conver ters. Even when inst alled in heterogene ous en-

vironments, SIPROTEC 4 relays therefore provide for open and interoperable opera-

tion. Besides control system integration, this interface enables DIGSI-communication

and inter-relay communication via GOOSE.

2.1.7.2 Setting Notes

Interface Selection No special settings are required for operating the Ethernet system interface module

(IEC 1850, EN100-Module). If the ordered ve rsion of the device is equipped with

such a module, it is automatically allocated to the interface available for it, namely

Port B.

2.1.7.3 Information List

No. Information Type of In-

formation Comments

009.0100 Failure Modul IntSP Failure EN100 Modul

009.0101 Fail Ch1 IntSP Failure EN100 Link Channe l 1 (Ch1)

009.0102 Fail Ch2 IntSP Failure EN100 Link Channe l 2 (Ch2)

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.2 Overcurrent Protection 50, 51, 50N, 51N

General time overcurrent protection is the main protective function of the 7SJ62/63/64

relay. Each phase curr ent and the ground curren t is provided with th ree element s. All

elements are independent of ea ch other and can be combined in any way.

If it is desired in isolated or resonant-grounded systems that three-phase devices

should work together with two-phase prot ection equipment, the time-overcurrent pro-

tection can be configured such that it allows two-phase operation besides three-phase

mode (see Section 2.1.3.2).

High-current elemen t 50-2 and overcurren t element 50-1 alwa ys operate with definite

tripping time, th e thir d ele m en t 51 , op er ates always with inverse tripping time.

Applications • The non-directional time overcurrent protection is suited for networks that are radial

and supplied from a single source or open looped networks or for backup protection

of differential protective schemes of all types of lines, transformers, generators,

motors, and busbars.

2.2.1 General

Depending on parameter 613 Gnd O/Cprot. w. the overcurrent protection for the

ground current can either operate with measured values IN or with the quantities 3I0

calculated from the three phase currents. Devices featuring a sensitive ground current

input, however, ge ne ra lly us e the calc ula te d quan tit y 3 I0.

All overcurrent ele ment enabled in the d evice may be blocked via the automatic reclo-

sure function (depending on the cycle) or via an external signal to the binary inputs of

the device. Removal of blocking during pickup will restart time delays. The Manual

Close signal is an exception. If a circuit breaker is manually closed onto a fault current,

it can be re-opened immediately. For overcurrent or high-set element the delay may

be bypassed via a Manual Close pulse, thus resulting in high speed tripping. This

pulse is extended up to at least 300 ms.

The automatic reclosure function 79 may also initiate immediate tripping for the over-

current and high-set elements depending on the cycle.

Pickup of the 50Ns elements can be stabilized by setting the dropout times. This pro-

tection comes into use in systems where intermittent faults occur . Combined with elec-

tromechanical relays, it allows different dropout responses to be adjus te d and a time

grading of digital and electromechanical relays to be implemented.

Pickup and delay settings may be quickly adapted to system requirements via

dynamic setting swapping (see Section 2.4).

Tripping by the 50-1, 51 elements (in phases), 50N-1 and 51N elements (in ground

path) may be blocked for inrush conditions by utilizing the inrush restraint feature.

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following table gives an overview of the interconnection to other functions of

7SJ62/63/64.

Table 2-1 In terconnection to other functions

2.2.2 Definite High-Current Elements 50-2, 50N-2

Phase and ground currents are compared separately with the pickup values of the

high-set elements 50-2 and 50N-2. If the respective pickup value is exceeded this is

signalled. After the user-defined time delays 50-2 DELAY or 50N-2 DELAY have

elapsed, trip sig nals are issued. Signals are available for each element. The dropout

value is roughly e qual to 95 % o f the pickup va lue for cur rents greater than > 0.3 INom.

Pickup can be stabilized by setting dropout times 1215 50 T DROP-OUT or 1315 50N

T DROP-OUT. This time is started and maintains the pickup condition if the current falls

below the threshold. The function thus does not drop out instantaneously. The trip

delay time 50-2 DELAY or 50N-2 DELAY continues in the meantime. After the

dropout delay time has elap sed, th e pickup is reported OFF and the trip de lay time is

reset unless the thresho ld 50-2 PICKUP or 50N-2 PICKUP has been violated again. If

the threshold is exceeded again while the dropout delay time is still running, it will be

cancelled. The trip delay time 50-2 DELAY or 50N-2 DELAY continues in the mean-

time. If the threshold is still exceeded after the time has elapsed, a trip will be initiated

immediately. If the threshold violation then no longer exist s, there will be no response.

If the threshold is violated again after the trip command delay time has ela psed and

while the dropout delay time is still running, a trip will be initiated at once.

These elements can be blocked by the automatic reclosure feature (AR).

Time Overcurrent

Elements Connection to Auto-

matic Reclosing Manual

CLOSE Dynamic Cold

Load Pickup Inrush Restraint

50-1 ••••

50-2 •••

51 ••••

50N-1 ••••

50N-2 •••

51N ••••

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following figur es show the logi c diagra ms for the high-curr ent element s 5 0-2 and

50N-2.

Figure 2-3 Logic diagram of the 50-2 high-current element for phases

If parameter MANUAL CLOSE is set to 50-2 instant. and manual close detection

applies, the trip is initiated as soon as the pickup conditions arrive, even if the element

is blocked via binary input. The same applies to 79AR 50-2 instantaneous.

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-4 Logic diagram of the 50N-2 high-current element for ground

If parameter MANUAL CLOSE is set to 50N-2 instant. and manual close detection

applies, the trip is initiated as soon as the pickup conditions arrive, even if the element

is blocked via binary input. The same applies to 79AR 50N-2 instantaneous.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.2.3 Definite Overcurrent Elements 50-1, 50N-1

Each phase and ground curren t is compared sep arately with the setting va lues of the

50-1 and 50N-1 relay elements and is signalled separately when exceeded. If the

inrush restraint feature (see below) is applied, eith er the normal pickup signals or the

corresponding inrush signals are output as long as inrush current is detected. After

user-configured time delays 50-1 DELAY and 50N-1 DELAY have elapsed, a trip

signal is issued if no inrush current is detected or inrush restraint is disabled. If the

inrush restraint feature is enabled, and an inrush condition exists, no tripping takes

place, but a message is recorded and displayed indicating when the overcurrent

element time delay elapses. Tripping signals and signals on the expiration of time

delay are available sep arately for each element. The dropout value is roughly equal to

95% of the pickup value for cu rrents greater than > 0.3 INom.

Pickups can be stabilized by setting dropout times 1215 50 T DROP-OUT or 1315

50N T DROP-OUT. This time is started and maintains the pickup condition if the

current falls below the threshold. The fun ction thus does not drop out instant aneously .

The trip delay time 50-1 DELAY or 50N-1 DELAY continues in the mean time. Af te r

the dropout delay time has elap sed, the pickup is reported OFF and the trip delay time

is reset unless the threshold 50-1 PICKUP or 50N-1 PICKUP has been violated again.

If the threshold is violated again while the dropout delay time is still running, it will be

cancelled. The trip delay time 50-1 DELAY or 50N-1 DELAY continues in the mean-

time. If the threshold is still exceeded after the time has elapsed, a trip will be initiated

immediately. If the threshold violation then no longer exists, there will be no response.

If the threshold is violated again after the trip command delay time has elapsed and

while the dropout delay time is still running, a trip will be initiated at once.

Pickup stabilization of the overcurrent elements 50-1 or 50N-1 by means of settable

dropout time is deactivated if an inrush pickup is present since an inrush does not rep-

resent an intermittent fault.

These elements can be blocked by the automatic reclosure feature (AR).

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following figures show the logic diagra ms for the current elements 50-1 and 50N-

Figure 2-5 Logic diagram of the 50-1 current element for phases

The dropout delay only operates if no inrush was detected. An incoming inrush will

reset a running dropout delay time.

If para meter MANUAL CLOSE is set to 50 -1 instant. and manual close detection

applies, the trip is initiated as soon as the pickup conditions arrive, even if the element

is blocked via binary input. Th e same applies to 79AR 50-1 instantaneous.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-6 Logic of the dropout delay for 50-1 phase current element

Figure 2-7 Logic diagram of the 50N-1 current element for ground

If parameter MANUAL CLOSE is set to 50N-1 instant. and manual close detection

applies, the trip is initiated as soon as the pickup conditions arrive, even if the element

is blocked via binary input. The same applies to 79AR 50N-1 instantaneous.

The pickup values of each element 50-1, 50- 2 for the phase current s and 50N-1, 50N-

2 for the ground curren t and the valid delay times for each e lement can be set in divid-

ually.

The dropout delay only operates if no inrush was detected. An arriving inrush will reset

an already running dropout delay time.

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-8 Logic of the dropout delay for 50N-1 ground current element

2.2.4 Inverse Time Overcurrent Elements 51, 51N

Inverse time ele m en ts are de pe n de n t on th e var ia nt or de r ed . Th ey ope ra te w ith an

inverse time characteristic ei ther according to the IEC- or the ANSI-standa rd or with a

user-defined characteristic. T he cha racterist ics an d associated fo rmu las ar e given in

the Technical Dat a. If inverse time characteristics have be en configured, definite time

elements 50-2 and 50-1 are al so enabled (see Sections "Definite Time High-Set Ele-

ments 50-2, 50N-2" and "Definite Time Overcurrent Elements 50-1, 50N-1").

Pickup Behaviour Each phase and ground current is sep arately compar ed with the pickup values of the

inverse time overcurrent protection element 51 and 51N. If a current exceeds 1.1

times the setting value, the corresponding element picks up and is signalled individu-

ally . If the inrush restraint feature is applied, either the normal pickup signals or the cor-

responding inrush signals are output as long as inrush current is detected. Pickup of

a relay element is based on the rms value of the fundame ntal harmonic. Whe n the 51

element picks up, the time delay of the trip signal is calculated using an integrated

measurement process. The calculated time delay is dependent on the actual fault

current flowing and the selected tripping characteristics. Once the time delay elapses,

a trip signal is issued assuming that no inru sh current is detected or inrush restraint is

disabled. If the inrush restraint feature is enabled and an inrush condition exists, no

tripping takes place, but a message is recorded and displayed indicating when the

overcurrent element time delay elapses.

These elements can be blocked by the automatic reclosure feature (79).

For ground current e leme nt 51N the cha racteri stic may be selecte d indepe nde ntly of

the characteristic used for phase currents.

Pickup values of elements 51 (phases) and 51N (ground cur rent) and the associa ted

time multipliers may be individually set.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following two figures show the logic diagrams for the 51 and 51N protection.

Figure 2-9 Logic diagram of the 51 current element for phases

If parameter MANUAL CLOSE is set to 51 instant. and manual close detection ap-

plies, the trip is initia ted a s soon as the pickup co nditions ar rive s, even if the ele ment

is blocked via binary input. The same applies to 79AR 51 instantaneous.

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-10 Logic diagram of the 51N current element for ground

If parameter MANUAL CLOSE is set to 51N instant. and manual close detection

applies, the trip is initiated as soon as the pickup conditions arrive, even if the element

is blocked via binary input. The same applies to 79AR 51N instantaneous.

Dropout Behaviour When using an ANSI or IEC curve select whether the dropout of an element is to occur

instantaneously after the threshold has been undershot or whether dropout is to be

performed by means of the disk emulation. "Instantaneously" means that pickup drops

out when the pickup value of approx. 95 % is undershot. For a new pickup the time

counter starts at zero.

The disk emula tio n evo ke s a dr op ou t pr oc ess (time counter is dec re me n tin g) which

begins after de-energization. This pro cess corresponds to the re set of a Ferraris-disk

(explaining it s d enomina tio n "disk em ulatio n"). In case several fault s occur in succes-

sion the "history" is taken into consideration due to the inertia of the Fer raris-disk and

the time response is adap ted. Reset begins as soon as 90% of the setting value is un-

dershot, in accordance to the dropout curve of the selected characteristic. In the range

between the dropout value (95% of the pickup value) and 90% of the setting value, the

incrementing and the decrementing processes are in idle state.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Disk emulation offers advantages when the overcurrent relay elements must be coor-

dinated with conventional electromechanical overcurrent relays located toward the

source.

User Defined

Curves When user defined characteristics are utilized, the tripping curve may be defined point

by point. Up to 20 pairs of values (current, time) may be entered. The de vice th en ap-

proximates the characteristic, using linear interpolation.

The dropout curve may be user-defined as well. See dropout for ANSI and IEC curves

in the function description. If no user-defined dropout curve is required, the element

drops ou t as soon as the respective cu rrent falls below approx. 95% of the set pickup

value. When a new pickup is evoked, the timer starts again at zero.

2.2.5 Dynamic Cold Load Pickup Function

It may be necessary to dynamically increase the pickup values if, during starting,

certain elements of the system show an increased power consumption after a long

period of zero voltage (e.g. air-conditioning systems, heating installations, motors).

Thus, a general raise of p ickup thresholds can be avoided taking such starting condi-

tions into consideration.

This dynamic pickup va lue changeove r is common to all o vercurrent elements and is

described in Section 2.4. The alternative pickup values can be set individually for each

element of the tim e ov er cu rr en t pr ote c t ion .

2.2.6 Inrush Restraint

When the multi-functional protective relay with local control 7SJ62/63/64 is installed,

for instance, to protect a power transformer , large magnetizing inrush currents will flow

when the transformer is energized. These inrush currents may be several times the

nominal transformer current, and, depending on the transformer size and design, may

last from several milliseconds to several seconds.

Although pickup of the relay elements is based only on the fundamental harmonic

component of the measured currents, false device pickup due to inrush is still a poten-

tial problem since, depending on the transformer size and design, the in rush current

also comprises a large component of the fundamental.

The 7SJ62/63/64 featur es an inte grated in rush restraint function. It p revent s the "no r-

mal" pickup of the 50-1 or 51 elemen ts (not 50-2) in the phases and the ground path

of the non-directional and directional time-overcurrent protection. T he same is true for

the alternative pickup thre sholds of the dynamic cold load pickup function. After detec-

tion of inrush currents above a pickup value special inrush signals are generated.

These signals also initiate fa ult annunciations and star t the associated trip delay time.

If inrush conditio ns are still pr es en t after the tripp i ng time de lay ha s ela psed, a corre -

sponding message („....Timeout.“) is output, but the overcurrent tripping is

blocked (see also logic diagrams of time overcurrent elements, Figures 2-5 to 2-10).

Inrush current contains a relatively large second harmonic component (twice the

nominal frequency) which is nearly ab sent dur ing a fault curre nt. The inr ush re straint

is based on the evaluation of the 2nd harmonic present in the inrush current. For fre-

quency analysis, digital filters are used to conduct a Fourier analysis of all three phase

currents and the ground current.

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Inrush current is recognized, if the following conditions are fulfilled at the same time:

• the harmonic content is larger than the setting value 2202 2nd HARMONIC;

• the currents do not exceed an up per limit value 2205 I Max;

• an exceeding of a threshold value via an inrush restraint of the blocked element

takes place.

In this case an inrush in the af fected phase is recognized (annunciations 1840 to 1842

and 7558 „InRush Gnd Det“, see figure 2-11) and its blocking being carried out.

Since quantitative analysis of the harmonic components cannot be completed until a

full AC cycle has been measured, pickup will generally be blocked by then. Therefore,

assuming the inrush restraint feature is enabled, a pickup message will be delayed by

a full AC cycle if no closing process is present. On the other hand, trip delay times o f

the time overcurrent protection feature are started immediately even with the inrush

restraint being enabled. Time delays continue running with inrush currents present. If

inrush blocking drops out after the time delay has elapsed, tripping will occur immedi-

ately . Therefore, utilization of the inrush restraint feature will not result in any additional

tripping delays. If a relay element drops out during inrush blocking, the associated time

delay will reset.

Cross Blocking Since inrush restraint operates individually for each phase, protection is ideal when a

transformer is energized onto a single-phase fault and inrush currents are detected on

a different healthy phase. However , the protection feature can be configured to ensure

that not only this phase element, but also the remaining elements (including ground)

are blocked (the so-called CROSS BLOCK function, address 2203), if the permissible

harmonic component of the current is exceeded for only one phase.

Please take into consideration that inrush currents flowing in the ground path will not

cross-block tripping by the phase elements.

Cross blocking is reset if there is no mor e inrush in any phase. Furth ermore, the cross

blocking function may also be limited to a particular time interval (address 2204

CROSS BLK TIMER). After expiry of this time interval, the cross-blocking function will

be disabled, even if inrush current is still present.

The inrush rest raint h as an upper limit: Above this (via adjust able p arameter 2205 I

Max) curren t blocking is suppressed since a hi gh-current fault is assumed in this case.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following figure shows the inrush restraint influence on the time overcurrent ele-

ments including cross-blocking.

Figure 2-11 Logic diagram for inrush restraint

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.2.7 Pickup Logic and Tripping Logic

The pickup annunciations of the individual phases (or ground) and the individual ele-

ments are combined with each other such that the phase information and the element

that have picked up are issued.

Table 2-2 Pickup annuncia tions of the time overcurrent protection

Also for the tripping signals th e element is indicated wh ic h ha s initiated the tripping.

Internal Annunciati on Figure Output Annunciati on FNo.

50-2 Ph A PU (Phase A,

pickup)

50-1 Ph A PU

51 Ph A PU

2-3

2-5

2-9 „50/51 Ph A PU“ 1762

50-2 Ph B PU

50-1 Ph B PU

51 Ph B PU

2-3

2-5

2-9 „50/51 Ph B PU“ 1763

50-2 Ph C PU

50-1 Ph C PU

51 Ph C PU

2-3

2-5

2-9 „50/51 Ph C PU“ 1764

50N-2 PU

50N-1 PU

51N PU

2-4

2-7

2-10 „50N/51NPickedup“ 1765

50-2 Ph A PU

50-2 Ph B PU

50-2 Ph C PU

50N-2 PU

2-3

2-4

„50-2 picked up“ 1800

50-1 Ph A PU

50-1 Ph B PU

50-1 Ph C PU

50N-1 PU

2-5

2-4

„50-1 picked up“ 1810

51 Ph A PU

51 Ph B PU

51 Ph C PU

51N PU

2-9

2-10

„51 picked up“ 1820

(All pickups) „50(N)/51(N) PU“ 1761

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.2.8 Two-Phase Time Overcurrent Protection (non-directional only)

Two-phase time overcurrent protection is used in isolated or resonant-grounded

systems where interaction with existing two-phase protection equipment is required.

Since an isolated or resonant-grounded system can still be operated with a ground

fault in one phase, this protection function detects double ground faults with high

ground fault currents. Only in the latter case, should a faulted feeder be shut down.

Measuring in two ph ases is sufficient to this end. Only phases A and C are monitor ed

in order to ensure selectivity of the protection in the network system.

If 250 50/51 2-ph prot (settable in P.System Data 1) is set to ON, IB is not used

for threshold comparison. If the fault is a simple ground fault in B, the element will not

pick up. Only after pickup on A or C a double ground fault is assumed, causing the

element to pick up and trip after the delay time has elapsed.

Note

With inrush recognition activated and inrush only on B, no crossblocking will take place

in the other phases. On the other hand, if inrush with crossblocking is activated on A

or C, B will also be blocked.

2.2.9 Busbar Protection by Use of Reverse Interlocking

Application

Example Each of the overcurrent elements can be blocked via binary inputs of the relay. A

setting parameter determines whether the b inary inpu t operates in the nor mally open

(i.e. actuated when energized) or the normally closed (i.e. actuated when de-ener-

gized) mode. This allows fast busbar prote ction to be applied in st ar systems o r open

ring systems by utilizing "reverse interlocking". This principle is often used, for exam-

ple, in distribution systems, auxiliary systems of power plants, and the like, where a

station supply transformer supplied from the transmission grid serves internal loads of

the generation station via a medium voltage bus with multiple feeders (Figure 2-12).

The reverse interlocking principle is based on the following: time overcurrent protec-

tion of the busbar feeder trip s with a short time delay 50-2 DELAY independent of the

grading times of the feeders, unless the pickup of the next load-side time overcurrent

protection element blocks the bus protect ion (Figure 2-12). Always the protection

element nearest to the fault will trip with the short time delay since this element cannot

be blocked by a protection element located behind the fault. Time elements 50-1

DELAY or 51 TIME DIAL are still effective as backup element. Pickup signals output

by the load-side protective relay are used as input message „>BLOCK 50-2“ via a

binary input at the feeder-side protective relay.

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-12 Reverse interlocking protection scheme

2.2.10 Setting Notes

General When selecting the time overcurrent protection in DIGSI a dialog box appears with

several tabs, such as General, 50, 51, 50N, 51N and InrushRestraint for setting indi-

vidual parameters. Depending on the functional scope specified during configuration

of the protective func tions in addresses 112 Charac. Phase and 113 Charac.

Ground the number of tabs can vary. If address FCT 50/51 was set to Definite

Time, or Charac. Ground to = Definite Time, then only the settings for the def-

inite time elements are available. The selection of TOC IEC or TOC ANSI makes avail-

able additional inverse characteristics. The superimposed high-set elements 50-2 and

50N-2 are availabl e in all these cases. Parameter 250 50/51 2-ph prot can also

be set to activate two- ph as e ov er cu rr en t pro te ct i on .

At address 1201 FCT 50/51 the phase time-overcurrent protection and at address

1301 FCT 50N/51N the ground time-overcurrent protection may be switched ON or

OFF.

Pickup values, time delays, and characteristics for groun d protection are set se parate-

ly from the pickup values, time delays and characteristic curves associated with phase

protection. Because of this, relay coordination for ground faults is independent of relay

coordination for phase faults, and more sensitive settings can often be applied to di-

rectional ground protection.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

50-2 Element The pickup value of the relay elemen t 50-2 is set at address 1202, the assigned time

delay 50-2 DELAY at address 1203. This stage is often used for current grading in

view of impedances such as transformers, motors or generators. It is specified such

that it picks up for faults up to this impedance.

Example: Transformer used to distribution bus supply with the following data:

Based on the data above, the following fault currents are calculated:

The nominal current of the transformer is:

Due to the following definition

the following setting applies to the protection device: The 50-2 relay element must be

set higher than the maximum fault current, which is detected during a low side fault on

the high side. To reduce fault probability as much as possible even when fault power

varies, the following setting is selected in primary values: I>>/INom = 10, i.e. I>> =

1000 A.

Increased inrush currents, if the fundamental component exceeds the setting value,

are rendered ha rm le ss by dela y time s (a dd re ss 1203 50-2 DELAY).

For motor protection, the 50-2 relay element must be set smaller than the smallest

phase-to-phase fau lt cu rr ent and la rge r th an the largest m otor starting current. Since

the maximum appearing startup current is usually below 1.6 x the rated startup current

(even with unfavorable conditions), the following setting is adequate for fault current

stage 50-2:

1.6 x IStartup < 50-2 Pickup <Iϕϕ–Min

The potential increase in st arting current caused b y overvolt age conditions is a lready

accounted for by the 1.6 factor. The 50-2 element may be set with no delay (50-2

DELAY = 0.00 s) since, unlike with e.g. the transformer, no saturation of the shunt re-

actance occurs in a motor.

The principle of the "reverse interlocking" utilizes the multi-element function of the time

overcurrent protection: element 50–2 is used as accelerated busbar protection with a

Rated Power of the Transformer SNomT = 16 MVA

Transformer Impedance ZTX = 10 %

Primary Nominal Voltage VNom1 = 110 kV

Secondary Nominal Voltage VNom2 = 20 kV

Vector Groups Dy 5

Starpoint Grounded

Fault power on 110 kV–side 1 GVA

3-Phase High Side Fault Current at 110 kV = 5250 A

3-Phase Low Side Fault Current at 20 kV = 3928 A

Current flowing on the High Side at 110 kV = 714 A

INomT, 110 = 84 A (High side) INomT, 20 = 462 A (Low side)

Current Transformer (High Side) 100 A / 1 A

Current Transformer (Low Side) 500 A / 1 A

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

short safety delay 50-2 DELAY (e.g. 100 ms). For fault s on th e outgoing fe eders the

element 50-2 is blocked. Both elements 50-1 or 51 serve as backup protection. The

pickup values of both elements (50- 1 PICKUP or 51 PICKUP and 50-2 PICKUP) are

set equal. Delay time 50-1 DELAY or 51 TIME DIAL is set such that it overgrades

the delay for the outgoing feeders.

The selected time is an additio nal time de lay and does no t include the oper ating time

(measuring time, dropout time). The delay can be set to ∞. After pickup the element

will then not trip. Pickup, however , will be signaled. If the 50-2 element is not required

at all, then the pickup threshold 50-2 PICKUP should be set to ∞. This setting pre-

vents tripping and the generation of a pickup message.

50N-2 Element The pickup and delay of element 50N-2 are set at addresses 1302 and 1303. The

same considerations apply for these settings as they did for phase currents discussed

earlier.

The selected time is only an additional time delay and does not include the operating

time (measuring time, dropout time). The delay can be set to ∞. After pickup the

element will then not trip. Pickup, however , will be signaled. If the 50N-2 element is not

required at all, the pickup threshold 50N-2 PICKUP should be set to ∞. This setting

prevent s tripping and the generation of a pickup message.

50-1 Element For setting the 50-1 relay element it is the maximum anticipated load current that must

be considered. Pickup due to overload should never occur, since the device, in this

mode, operates as fault protectio n with correspondingly short tripping times and not

as overload protection. For this reason, a setting equal to 20% is recommended for

line protection, and a setting equal to 40% of the expected peak load is recommended

for transformers and motors.

The settable time delay (address 1205 50-1 DELAY) results from the grading c oor-

dination chart defined for the network.

The selected time is an additio nal time de lay and does no t include the oper ating time

(measuring time, dropout time). The delay can be set to ∞. After pickup the element

will then not trip. Pickup, however , will be signaled. If the 50-1 element is not required

at all, then the pickup threshold 50-1 PICKUP should be set to ∞. This setting prevents

tripping and the generation of a pickup message.

50N-1 Element The pickup value of the 50N-1 relay element should be set below the minimum antic-

ipated ground fault current.

If the relay is used to protect transformers or motors with large inrush currents, the

inrush restraint feature of 7SJ62/63/64 may be used for the 50N–1 relay element. It

can be enable d or disa ble d fo r bo th the ph as e curr en t an d th e gr ou n d curre n t in

address 2201 INRUSH REST.. The characteristic values of the inrush restraint are

listed in Subsection "Inrush Restraint".

The delay is set at addr ess 1305 50N-1 DELAY and should be b ased on system co -

ordination requirements. For ground currents in a grounded system a separate coor-

dination chart with short time delays is often used.

The selected time is an additio nal time de lay and does no t include the oper ating time

(measuring time, dropout time). The delay can be set to ∞. After pickup the element

will then not trip. Pickup, however, will be signaled. If the 50N-1 element is not required

at all, the pickup thres ho ld 50 N- 1 PICKU P sho uld be set to ∞. This setting prevents

tripping and the generation of a pickup message.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Pickup Stabilization

(Definite Time) The dropout times 1215 50 T DROP-OUT or 1315 50N T DROP-OUT can be set to

implement a unifo rm dropout behaviour when using electromech anical relays. This is

necessary for a time grading. The dropout time of the electromechanical relay must be

known to this end. Subtract the dropout time of the 7SJ relay (see Technical Data) from

this value and enter the result in the parameters.

51 Element with IEC

or ANSI Character-

istics

Having set address 112 Charac. Phase = TOC IEC or TOC ANSI when configuring

the protective functions (Section 2.1.1.2), the parameters for the inverse characteristic

will also be available.

If address 112 Charac. Phase = TOC IEC, you can specify the desired IEC–

characteristic (Normal Inverse, Very Inverse, Extremely Inv. or Long

Inverse) in address 1211 51 IEC CURVE. If address 112 Charac. Phase = TOC

ANSI, you can specify the desired ANSI–characteristic (Very Inverse, Inverse,

Short Inverse, Long Inverse, Moderately Inv., Extremely Inv. or

Definite Inv.) in address 1212 51 ANSI CURVE.

If the inverse time trip characteristic is sele cted, it must be noted that a safety factor

of about 1.1 has alrea dy been included between the pickup value and the setting

value. This means that a pickup will only occur if a current of about 1.1 times the

setting value is present. If Disk Emulation was selected at address 1210 51

Drop-out, reset will occur in accordance with the reset curve as described before.

The current value is set at address 1207 51 PICKUP. The setting is mainly deter-

mined by the maximum operating current. Pickup due to overload should never occur ,

since the device, in this mode, operates as fault protectio n with correspondingly short

tripping time s an d no t as over loa d pro te ctio n.

The corresponding element time multiplication factor for an IEC characteristic is set at

address 1208 51 TIME DIAL and in address 1209 51 TIME DIAL for an ANSI

characteristic. It must be coordinated with the time grading of the network.

The time multiplier can also be set to ∞. After pickup the element will then not trip.

Pickup, however , will be signaled. If the 51 element is not required at all, address 112

Charac. Phase should be set to Definite Time during protective function con-

figuration (see Section 2.1.1.2).

51N Element with

IEC or ANSI Char-

acteristics

Having set address 113 Charac. Ground = TOC IEC when configuring the protec-

tive functions (Section 2.1.1), the parameters for the inverse characteristics will also

be available. Specify in address 1311 51N IEC CURVE the desired IEC characteristic

(Normal Inverse, Very Inverse, Extremely Inv. or Long Inverse). If

address 113 Charac. Ground = TOC ANSI, you can specify the desired ANSI–

characteristic (Very Inverse, Inverse, Short Inverse, Long Inverse,

Moderately Inv., Extremely Inv. or Definite Inv.) in address 1312 51N

ANSI CURVE.

If the inverse time trip characteristic is sele cted, it must be noted that a safety factor

of about 1.1 has alrea dy been included between the pickup value and the setting

value. This means that a pickup will only occur if a current of about 1.1 times the

setting value is present. If Disk Emulation was selected at address 1310 51

Drop-out, reset will occur in accordance with the reset curve as described before.

The current value is set at address 1307 51N PICKUP. The most relevant for this

setting is the minimum appearing ground fault current.

The corresponding element time multiplication factor for an IEC characteristic is set at

address 1308 51N TIME DIAL and in add ress 1309 51N TIME DIAL for an ANSI

characterist ic. Th is ha s to be coord ina te d with the grading coordination chart of the

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

network. For ground and grounded cu rrents with grounded ne twork, you can often set

up a sepa rate grading coordination chart with shorter delay times.

The time multiplier can also be set to ∞. After pickup the element will then not trip.

Pickup, however, will be signaled. If the 51N-TOC element is not required at all,

address 113 Charac. Ground should be set to Definite Time during protective

function configuration (see Section 2.1.1).

User Defined Char-

acteristics (Phases

and ground)

Having set address 112 Charac. Phase or 113 = Charac. Ground = User

Defined PU or User def. Reset when configuring the protective functions (Sec-

tion 2.1.1.2), the user specified curves will also be available. A maximum of 20 value

pairs (current and time) may be entered at address 1230 51/51N or 1330 50N/51N

in this case. This option allows point-by-point entry of any desired curve. If during con-

figuration of address 112 was set to User def. Reset or 113 was set to User

def. Reset, additional value pairs (current and reset time) may be entered in

address 1231 MofPU Res T/Tp or 1331 MofPU Res T/TEp to represent the reset

curve.

Since current values are rounded in a specific pattern before they are processed in the

device (see Tab le 2- 3) , we re co mm e n d to us e exa ct l y the sam e pr ef er re d curr en t

values you can find in this table.

The current and time value pairs are entered as multiples of addresses 1207 51

PICKUP and 1208 51 TIME DIAL for the phase currents and 1307 and 1308 for the

ground system. Therefore, it is recommend ed that these addresse s are initially set to

1.00 for simplicity. Once the curve is entered, the settings at addresse s 1207 or 1307

and/or 1208 or 1308 may be modified later on if necessary.

The default setting of current values is ∞. The y ar e, th erefore , not e nab led — a nd no

pickup or tripping of these protective functions will occur.

The following must be observed:

• The value pair s should be entered in increasing sequence. Fewer than 20 pairs is

also sufficient. In most cases, about 10 pairs is sufficient to define the characteristic

accurately. A value pair which will not be used has to be made invalid by entering

"∞© for the threshold! The user must ensure the value pairs produce a clear and

constant characteristic.

The current values entere d should be those from the following t able, along with th e

matching times. Deviating values MofPU (multiples of PU-values) are rounded.

This, however, will not be indicated.

Current flows less than the smallest current value entered will not lead to an exten-

sion of the tripping time. T he pickup curve (see Figure 2-13, right side) is parallel to

the current axis, up to the smallest current value point.

Current flows greater than the highest current value entered will not lead to a reduc-

tion of the tripping time. The pickup characteristic (see Figure 2-13, right side) is

parallel to the current axis, beginning with the greatest curve value point.

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Table 2-3 Preferential values of standardized currents for user-defined tripping curves

Figure 2-13 Using a user-defined curve

The value pairs are entered at add re ss 1231 MofPU Res T/Tp or 1331 MofPU

Res T/TEp to recreate the reset curve. The following must be observed:

• The current values entered should be those from the following Table 2-4, along with

the matching times. Deviating values of MofPU are rounded. This, however , will not

be indicated.

Current flows greater than the highest current value entered will not lead to a pro-

longation of the reset time. The reset curve (see Figure 2-13, left side) is p arallel to

the current axis, beginning with the greatest curve value point.

Current flows which are less than the smallest current value entered will not lead to

a reduction of the reset time. The reset curve (see Figu re 2-13, lef t side) is para llel

to the current axis, beginning with th e smallest curve value point.

Table 2-4 Preferenti al values of standardized currents for user-defined reset curves

MofPU = 1 to 1.94 MofPU = 2 to 4.75 MofPU = 5 to 7.75 MofPU = 8 to 20

1.00 1.50 2.00 3.50 5.00 6.50 8.00 15.00

1.06 1.56 2.25 3.75 5.25 6.75 9.00 16.00

1.13 1.63 2.50 4.00 5.50 7.00 10.00 17.00

1.19 1.69 2.75 4.25 5.75 7.25 11.00 18.00

1.25 1.75 3.00 4.50 6.00 7.50 12.00 19.00

1.31 1.81 3.25 4.75 6.25 7.75 13.00 20.00

1.38 1.88 14.00

1.44 1.94

MofPU = 1 to 0.86 MofPU = 0.84 to 0.67 MofPU = 0.66 to 0.38 MofPU = 0.34 to 0.00

1.00 0.93 0.84 0.75 0.66 0.53 0.34 0.16

0.99 0.92 0.83 0.73 0.64 0.50 0.31 0.13

0.98 0.91 0.81 0.72 0.63 0.47 0.28 0.09

0.97 0.90 0.80 0.70 0.61 0.44 0.25 0.06

0.96 0.89 0.78 0.69 0.59 0.41 0.22 0.03

0.95 0.88 0.77 0.67 0.56 0.38 0.19 0.00

0.94 0.86

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

When using DIGSI to modi fy settings, a dialog box is available to enter up to 20 value

pairs for a characteristic curve (see fig ure 2-14).

In order to represent the characteristic graphically, the user should click on

"characteristic". The previously entered characteristic will appear as shown in Figure

2-14.

The characteristic curve show n in the graph can be modified later on. Placing the

mouse cursor over a point on the characteristic, the cursor changes to the shape of a

hand. Press and hold the lef t mouse button and drag the data item to the desired po-

sition. Releasing the mouse button will automatically update the value in the value

table.

The respective upper limits for the va lue setting rang e are indicated by dotted lin es in

the right-hand and upper area of the system of coordinates. If the position of a data

point lies outside these limits, the associated value will be set to infinity.

Figure 2-14 Inputting and visualizing a user-defined trip curve with DIGSI – Example

Inrush Restraint When applying the protection device to transformers where high inrush currents are

to be expected, the 7SJ62/63/64 can make use of an inrush r estraint function for the

overcurrent elements 50–1, 51, 50N–1 and 51N as well as the non-directional over-

current elements.

Inrush restraint is only effective and accessible if address 122 InrushRestraint

was set to Enabled during configuration. If the function is not required Disabled is

to be set. In address 2201 INRUSH REST. the function is switched ON or OFF jointly

for the overcurrent elements 50–1, 51, 50N-1 and 51N.

The inrush restraint is based on the evaluation of th e 2nd harmonic present in the

inrush current. Upon delivery from the factory, a ratio I2f/If of 15 % is set. Under normal

circumstan ces, this setting wi ll not n eed to be chan ged. The settin g value is id entical

for all phases and ground. However, the component required for restraint may be ad-

justed to system conditions in address 2202 2nd HARMONIC. To provide more re-

straint in exceptional cases, where energizing conditions are particularly unfavour-

able, a smaller value can be set in the address before-mentioned, e.g. 12 %.

The effective duration of th e cro ss- b l ock ing 2203 CROSS BLK TIMER can be set to

a value between 0 s (harmonic restraint active for each phase individually) and a

maximum of 180 s (har monic restraint of a pha se also blocks the other phases for the

specified duration).

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

If the current exceeds the value set in address 2205 I Max, no further restraint will

take place for the 2nd harm o nic .

The lower operating limit of the restraining function amounts to 0.25 times the sec-

ondary nominal current of the fundamental harmonic (250 mA with 1 A sec. nominal

current). The blo ckin g is thus no t en ab led for lowe r cur re n ts. This also applie s to the

ground current and, if necessar y, should be taken into consideration during setting of

the pickup threshold of the ground stage.

Manual Close Mode

(Phases, ground) When a circuit breaker is closed onto a faulted line section, a high speed trip by the

circuit breaker is usually de sired. For overcu rrent or high-set elemen ts the delay may

be bypassed via a “Manual Close” signal, thus resulting in instant aneous tripping. The

internal "Manual close" sig nal is built from the binary input signal „>Manual Close“

(no. 561). The internal "Manual close" signal remains active as long as the binary input

signal „>Manual Close“ is active, but at lease for 300 ms (see the following logic

diagram).To enable the device to react properly on occurre nce of a fault in the pha se

elements after manual close, address 1213 MANUAL CLOSE has to be set accordingly .

Accordingly, address 1313 MANUAL CLOSE is considered for the ground path ad-

dress. Thus, the user determines for both elements, the phase and the ground ele-

ment, what pickup value is active with what delay when the circuit breaker is closed

manually.

Figure 2-15 Manual close feature

External Control

Switch If the manual closing signal is not from a 7SJ62/63/64 relay, that is, neither sent via

the built-in oper at or inte rf ace no r via a ser i es inte rfa ce , bu t, ra th er, dire ctly from a

control acknowledgment switch, this signal must be passed to a 7SJ62/63/64 binary

input, and configured accordingly („>Manual Close“), so that the element selected

for MANUAL CLOSE will be effective. Its alternative Inactive means that the element

operates as configured even with manual close.

Internal Control

Function The manual closing information must be allocated via CFC (interlocking task-level)

using the CMD_Information block, if the internal contr ol function is used (see Figure

2-16).

Figure 2-16 Example for manual close feature using the internal control function

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Note

For an interaction between the automatic reclosure (AR) and the con trol function, an

extended CFC l ogic is necessary . See ma rgin heading „CLOSE command: Dire ctly or

via control“ in the Setting Notes of the AR function (Section 2.14.6).

Interaction with Au-

tomatic Reclos u re

Function (Phases)

When reclosing occurs, it is desirable to have high speed protection against faults with

50-2. If the fault still exists af ter the first reclosure, elements 50-1 or 51 will be initiated

with graded tripping times, that is, the 50-2 elements will be blocked. At address 1214

50-2 active, it can be specified whether (with 79 active) or not (Always) the

50-2 element s should be supervised by the status of an internal or external automatic

reclosing device. Address with 79 active determines that the 50-2 elements will

not operate unless automatic reclosing is not blocked. If not desired, then setting

Always is selected having the effect that the 50-2 elements will always operate, as

configured.

The integrated automatic reclosing function of 7SJ62/63/64 also provides the option

to individually determine for each time overcurrent element whether tripping or block-

ing is to be carried out instantaneously, unaffected by the AR with time delay (see

Section 2.14).

Interaction with Au-

tomatic Reclosing

Function (ground)

When reclosing is expected, it is desirable to have high speed protection against faults

with 50N-2. If the fault still exists af ter the first reclosure, elements 50N-1 or 51N must

operate with graded tripping times, that is, the 50N-2 elements will be blocked. At

address 1314 50N-2 active, it can be specified whether (with 79 active) or

not (Always) the 50N-2 element s should be supervised by the st atus of an internal or

external automatic reclosing device . Add ress with 79 active determines that the

50N-2 elements will only operate when automatic reclosing is not blocked. If not de-

sired, then setting Always is selected having the effect that the 50N-2 elements will

always operate, as configured.

The integrated automatic reclosing function of 7SJ62/63/64 also provides the option

to individually determine for each time overcurrent element whether tripping or block-

ing is to be carried out instantaneously, unaffected by the AR with time delay (see

Section 2.14).

2.2.11 Settings

Addresses which have an appended "A" can only be changed with DIGSI, under "Dis-

play Additional Settings".

The table indicates region-specific default settings. Column C (configuration) indicates

the corresponding secondary nominal current of the current transformer.

Addr. Parameter C Setting Options Default Setting Comments

1201 FCT 50/51 ON

OFF ON 50, 51 Phase Time Over-

current

1202 50-2 PICKUP 1A 0.10 .. 35.00 A; ∞2.00 A 50-2 Pickup

5A 0.50 .. 175.00 A; ∞10.00 A

1203 50-2 DELAY 0.00 .. 60.00 sec; ∞0.00 sec 50-2 Time Delay

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

1204 50-1 PICKUP 1A 0.10 .. 35.00 A; ∞1.00 A 50-1 Pickup

5A 0.50 .. 175.0 0 A; ∞5.00 A

1205 50-1 DELAY 0.00 .. 60.00 sec; ∞0.50 sec 50-1 Time Delay

1207 51 PICKUP 1A 0.10 .. 4.00 A 1.00 A 51 Pickup

5A 0.50 .. 20.00 A 5.00 A

1208 51 TIME DIAL 0.05 .. 3.20 sec; ∞0.50 sec 51 T ime Dial

1209 51 TIME DIAL 0.50 .. 15.00 ; ∞5.00 51 Time Dial

1210 51 Drop -out Instantaneous

Disk Emulation Disk Emulation Drop-out characteristic

1211 51 IEC CURVE Normal Inverse

Very Inverse

Extremely Inv.

Long Inverse

Normal Inverse IEC Curve

1212 51 ANSI CURVE Very Inverse

Inverse

Short Inverse

Long Inverse

Moderately Inv.

Extremely Inv.

Definite Inv.

Very Inverse ANSI Curve

1213A MANUAL CLOSE 50-2 instant.

50 -1 instant.

51 instant.

Inactive

50-2 instant. Manual Close Mode

1214A 50-2 active Always

with 79 active Always 50-2 active

1215A 50 T DROP-OUT 0.00 .. 60.00 sec 0.00 sec 50 Drop-Out Time Delay

1230 51/51 N 1.00 .. 20.00 I/Ip; ∞

0.01 .. 999.00 TD 51/51N

1231 MofPU Res T/Tp 0.05 .. 0.95 I/Ip; ∞

0.01 .. 999.00 TD Multiple of Pickup <-> T/Tp

1301 FCT 50N/51N ON

OFF ON 50N, 51N Ground Time

Overcurrent

1302 50N -2 PICKUP 1 A 0.05 .. 35.00 A; ∞0.50 A 50N-2 Pickup

5A 0.25 .. 175.0 0 A; ∞2.50 A

1303 50N-2 DELAY 0.00 .. 60.00 s ec; ∞0.10 sec 50N-2 Time Delay

1304 50N -1 PICKUP 1 A 0.05 .. 35.00 A; ∞0.20 A 50N-1 Pickup

5A 0.25 .. 175.0 0 A; ∞1.00 A

1305 50N-1 DELAY 0.00 .. 60.00 s ec; ∞0.50 sec 50N-1 Time Delay

1307 51N PICKUP 1A 0.05 .. 4.00 A 0.20 A 51N Pickup

5A 0.25 .. 20.00 A 1.00 A

1308 51N TIME DIAL 0.05 .. 3.20 sec; ∞0.20 sec 51N Time Dial

1309 51N TIME DIAL 0.50 .. 15.00 ; ∞5.00 51N Time Dial

Addr. P arameter C Setting Options Def ault Setting Comments

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.2.12 Information List

1310 51N Drop-out Instantaneous

Disk Emulation Disk Emulation Drop-Out Characteristic

1311 51N IEC CURVE Normal Inverse

Very Inverse

Extremely Inv.

Long Inverse

Normal Inverse IEC Curve

1312 5 1N ANSI CURVE Very Inverse

Inverse

Short Inverse

Long Inverse

Moderately Inv.

Extremely Inv.

Definite In v.

Very Inverse ANSI Curve

1313A MANUAL CLOSE 5 0N-2 instant.

50N-1 instant.

51N instant.

Inactive

50N-2 instant. Manual Close Mode

1314A 50N-2 active Always

With 79 Active Always 50N-2 active

1315A 50N T DROP-OUT 0.00 .. 60.00 sec 0.00 sec 50N Drop-Out Time Delay

1330 50N/51N 1.00 .. 20.00 I/Ip; ∞

0.01 .. 999.00 TD 50N/51N

1331 MofPU Res T/TEp 0.05 .. 0.95 I/Ip; ∞

0.01 .. 999.00 TD Multiple of Pickup <->

T/TEp

2201 INRUSH REST. OFF

ON OFF Inrush Restraint

2202 2nd HARMONIC 10 .. 45 % 15 % 2nd. harmonic in % of fun-

damental

2203 CROSS BLOCK NO

YES NO Cross Block

2204 CROSS BLK TIMER 0.00 .. 180.00 sec 0.00 sec Cross Block Time

2205 I Max 1A 0.30 .. 25.00 A 7.50 A Maximum Current for

Inrush Restraint

5A 1.50 .. 125. 0 0 A 37.50 A

No. Information Type of In-

formation Comments

1704 >BLK 50/51 SP >BLOCK 50/51

1714 >BLK 50N/51N SP >BLOCK 50N/51N

1721 >BLOCK 50-2 SP >BLOCK 50-2

1722 >BLOCK 50-1 SP >BLOCK 50-1

1723 >BLOCK 51 SP >BLOCK 51

1724 >BLOCK 50N-2 SP >BLOCK 50N-2

1725 >BLOCK 50N-1 SP >BLOCK 50N-1

1726 >BLOCK 51N SP >BLOCK 51N

Addr. Parameter C Setting Options Default Setting Comments

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

1751 50/51 PH OFF OUT 50/51 O/C switched OFF

1752 50/51 PH BLK OUT 50/51 O/C is BLOCKED

1753 50/51 PH ACT OUT 50/51 O/C is ACTIVE

1756 50N/51N OFF OUT 50N/51N is OFF

1757 50N/51N BLK OUT 50N/51N is BLOCKED

1758 50N/51N ACT OUT 50N/51N is ACTIVE

1761 50(N)/51(N) PU OUT 50(N)/51(N) O/C PICKUP

1762 50/51 Ph A PU OUT 50/51 Phase A picked up

1763 50/51 Ph B PU OUT 50/51 Phase B picked up

1764 50/51 Ph C PU OUT 50/51 Phase C picked up

1765 50N/51NPickedup OUT 50N/51N picked up

1791 50(N)/51(N)TRIP OUT 50(N)/51(N) TRIP

1800 50-2 picked up OUT 50-2 picked up

1804 50-2 TimeOut OUT 50-2 Time Out

1805 50-2 TRIP OUT 50-2 TRIP

1810 50-1 picked up OUT 50-1 picked up

1814 50-1 TimeOut OUT 50-1 Time Out

1815 50-1 TRIP OUT 50-1 TRIP

1820 51 picked up OUT 51 picked up

1824 51 Time Out OUT 51 Time Out

1825 51 TRIP OUT 51 TRIP

1831 50N-2 picked up OUT 50N-2 picked up

1832 50N-2 TimeO ut OUT 50N-2 Time Out

1833 50N-2 TRIP OUT 50N-2 TRIP

1834 50N-1 picked up OUT 50N-1 picked up

1835 50N-1 TimeO ut OUT 50N-1 Time Out

1836 50N-1 TRIP OUT 50N-1 TRIP

1837 51N picked up OUT 51N picked up

1838 51N TimeOut OUT 51N Time Out

1839 51N TRIP OUT 51N TRIP

1840 PhA InrushDet OUT Phase A inrush detection

1841 PhB InrushDet OUT Phase B inrush detection

1842 PhC InrushDet OUT Phase C inrush detection

1843 INRUSH X-BLK OUT Cross blk: PhX blocked PhY

1851 50-1 BLOCKED OUT 50-1 BLOCKED

1852 50-2 BLOCKED OUT 50-2 BLOCKED

1853 50N-1 BLOCKED OUT 50N-1 BLOCKED

1854 50N-2 BLOCKED OUT 50N-2 BLOCKED

1855 51 BLOCKED OUT 51 BLOCKED

1856 51N BLOCKED OUT 51N BLOCKED

1866 51 Disk Pickup OUT 51 Disk emulatio n Pickup

1867 51N Disk Pickup OUT 51N Disk emulation picked up

7551 50-1 InRushPU OUT 50-1 InRush picked up

7552 50N-1 InRushPU OUT 50N-1 InRush picked up

7553 51 InRushPU OUT 51 InRush picked up

7554 51N InRushPU OUT 51N InRush picked up

No. Information Type of In-

formation Comments

2.2 Overcurrent Protection 50, 51, 50N, 51N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

7556 InRush OFF OUT InRush O FF

7557 InRush BLK OUT InRush BLOCKED

7558 InRush Gnd Det OUT InRush G round detected

7559 67-1 InRushPU OUT 67-1 InRush picked up

7560 67N-1 InRushPU OUT 67N-1 InRush picked up

7561 67-TOC InRushPU OUT 67-TOC InRush picked up

7562 67N-TOCInRushPU OUT 67N-TOC InRush picked up

7563 >BLOCK InRush SP >BLOCK InRush

7564 Gnd InRush PU OUT Ground InRush picked up

7565 Ia InRush PU OUT Phase A InRush picked up

7566 Ib InRush PU OUT Phase B InRush picked up

7567 Ic InRush PU OUT Phase C InRush picked up

No. Information Type of In-

formation Comments

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.3 Directional Overcurrent Protection 67, 67N

With directional time overcurrent protection the phase currents and the ground current

are provided with three elements. All elements may be configur ed independently from

each other and combined according to the user's requirements.

High-current elements 67-2 and overcurrent element 67-1 always operate with definite

tripping time, th e thir d ele m en t 67 -TOC, oper a tes with inverse tripping ti me .

Applications • The directional overcurrent protection allows the application of multifunctional pro-

tection devices 7SJ62/63/64 to systems where coordination protection depends on

knowing both the magnitude o f the fault current an d the d ire ction of ene rg y flow to

the fault location.

• The time overcurrent protection (non-directional) described in Section 2.2 may

operate as overlapp ing backup pr otectio n o r may be disable d. Addi tionally, individ-

ual elements (e.g. 67-2 and/or 67N-2) may be interconnected with the directional

overcurrent protection.

• For parallel lines or transformers supplied from a single source only directional

overcurrent protection allows selective fault detection.

• For line sections supplied from two sources or in rin g-operated lines the time over-

current protection has to be supplemented by the directional criterion .

2.3.1 General

For parallel lines or transformers supplied from a single source (Figure 2-17), the

second feeder (II) is opened on occurre nce of a fault in the first feeder ( I) if tripping of

the breaker in the p arallel feeder is not prevente d by a directional measuring element

(at B). Therefore, whe re indi cated with an arro w (Figure 2-17) dir ectional overcurren t

protection is applied. Be careful that the "Forward" direction of the protective element

is in the direction of the line (or object to be protected). This is not necessarily identical

with the direction of the normal load flow, as shown in Figure 2-17.

2.3 Directional Overcurrent Protection 67, 67N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-17 Overcurrent protection for parallel transformers

For line sections sup plied from two sources or in ring-operated lines the time o vercur-

rent protection ha s to be supplemented by the directio nal criterion. Figure 2-18 shows

a ring system where both energy sources are merged to one single source.

Figure 2-18 Transmission lines with sources at each en d

Depending on th e setting of parameter 613 Gnd O/Cprot. w., the ground current

element can operate either with measured values IN or with the values 3I0 calculated

from the three phase currents. Devices featuring a sensitive ground current input,

however, use the calculated quantity 3I0.

For each element the time can be blocked via binary input or automatic reclosure

(cycle-dependent), thus suppressing the trip command. Removal of blocking during

pickup will restart time delays. The Manual C los e signal is an exception. If a circuit

breaker is manually closed onto a fault, it can be re-opened immediately. For overcur-

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

rent elements or high-set elements the delay may be bypassed via a Manual Close

pulse, thus resulting in high-speed tripping.

Furthermore, imme diate tripping may be initiated in conjunction with the a utomatic re-

closure function (cycle-dependent).

Pickup stabilization for the 67/67N element s of the directional time overcurrent protec-

tion can be accomplished by means of sett able dr opout times. Th is protection comes

into use in systems where intermittent faults occur . Combined with electromechanical

relays, it allows different dropout responses to be adjusted and a time grading of digital

and electromechanical relays to be implemented.

Pickup and delay settings may be quickly adjusted to system requirements via

dynamic setting swapping (see Section 2.4).

Utilizing the inrush restraint feature tripping may be blocked by the 67-1, 67-TOC,

67N-1, and 67N-TOC elements in phases and ground path when inrush current is de-

tected.

The following table gives an overview of the interconnection to other functions of

7SJ62/63/64.

Table 2-5 Interconnection to other functions

Directional Time

Overcurrent Pro-

tection Elements

Connection to Auto-

matic Reclosing Manual

CLOSE Dynamic Cold

Load Pickup Inrush Restraint

67-1 • • • •

67-2 • • •

67-TOC • • • •

67N-1 • • • •

67N-2 • • •

67N-TOC • • • •

2.3 Directional Overcurrent Protection 67, 67N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.3.2 Definite Time, Directional High-set Elements 67-2, 67N-2

Phase and ground current are compared separately with the pickup values 67-2

PICKUP and 67N-2 PICKUP of the respective relay elements. Currents above the

setting values are signalled separately when fault direction is equal to the direction

configured. After the user-defined time delays 67-2 DELAY, 67N-2 DELAY have

elapsed, trip sig nals are issued. Signals are available for each element. The dropout

threshold is roughly equal to 95% of the pickup value for current s greater than > 0.3

INom.

Pickup can be stabilized by setting dropout times 1518 67 T DROP-OUT or 1618 67N

T DROP-OUT. This time is started if the current falls below the threshold and maintains

the pickup condition. The function thus does not drop out instantaneously. The trip

delay time 67-2 DELAY or 67N-2 DELAY continues in the meantime. After the

dropout delay time has elap sed, th e pickup is reported OFF and the trip de lay time is

reset unless the threshold 67-2 PICKUP or 67N-2 PICKUP has been violated again.

If the threshold is exceeded again while the dropout delay time is still running, it will be

cancelled. The trip delay time 67-2 DELAY or 67N-2 DELAY continues in the mean-

time. If the threshold is still exceeded after the time has elapsed, a trip will be initiated

immediately. If the threshold violation then no longer exist s, there will be no response.

If the threshold is exceeded again after the trip command delay time ha s elapsed and

while the dropout delay time is still running, a trip will be initiated at once.

These elements can be blocked by the automatic reclosure feature (AR).

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following figure shows by way of example the logic diagram for the high-set

element 67-2 .

Figure 2-19 Logic diagram of the directional high-current element 67-2 for ph ases

If parameter MANUAL CLOSE is set to 67-2 instant. and manual close detection

applies, the pickup is tripped inst antaneou sly, also if the element is blocked via b inary

input. The same applies to 79 AR 67-2 instantaneous.

2.3 Directional Overcurrent Protection 67, 67N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

2.3.3 Definite Time, Directional Overcurrent Elements 67-1, 67N-1

Phase and ground current are comp ared separately with the setting values 67-1

PICKUP and 67N-1 PICKUP of the respective relay elements. Currents above the

setting values are signalled separately when fault direction is equal to the direction

configured. If the inrush restraint feature is applied, either the normal pickup signals or

the corresponding inrush signals are output as long as inrush current is detected.

When, af ter pickup without inrush re cognition, the relevant delay times 67-1 DELAY,

67N-1 DELAY have expired, a tripping command is issued. If the inrush restraint

feature is enabled, and an inrush condition exists, no tripping takes place, but a

message is record e d an d dis pla ye d ind ica tin g when the ove rcu rr en t elem en t tim e

delay elapses. Tripping signals and signals on the expiration of time delay are avail-

able separately for each element. The dropout value is roughly equal to 95% of the

pickup value for currents greater than > 0.3 INom.

In addition, pickups can be stabilized by setting dropout times 1518 67 T DROP-OUT

or 1618 67N T DROP-OUT. This time is started if the current falls below the threshold

and maintains the pickup condition. The function thus do es not drop ou t instanta-

neously. The trip delay time 67-1 DELAY or 67N-1 DELAY continues in the mean-

time. After the dropout delay time has elapsed, the pickup is reported OFF and the trip

delay time is reset unless the threshold 67-1 PICKUP or 67N-1 PICKUP has been

violated again. If the threshold is violated again while the dropout delay time is still run-

ning, it will be cancelled. The trip delay time 67-1 DELAY or 67N-1 DELAY continues

in the meantime. If the threshold is still exceeded after the time has elapsed, a trip will

be initiated immediately. If the threshold violation then no longer exists, there will be

no response. If the threshold is violated again after the trip command delay time has

elapsed and while the dropout delay time is still running, a trip will be initiated at once.

Pickup stabilization of the overcurrent elements 67-1 or 67N-1 by means of settable

dropout times is deactivated in the even t of an inrush pi ckup, since an inru sh is no in-

termittent fault.

These elements can be blocked by the automatic reclosure feature (AR).

2 Functions

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

The following figure shows by way of an example the logic di agram for the dir ectional

overcurrent element 67-1.

Figure 2-20 Logic diagram for the directional overcurrent element 67-1 for phases

The dropout delay only operates if no inrush was detected. An arriving inrush will reset

an already running dropout delay time.

2.3 Directional Overcurrent Protection 67, 67N

SIPROTEC 4, 7SJ62/63/64 Handbuch

C53000-G1140-C147-A, Edition 07.2015

Figure 2-21 Logic of the dropout delay for 67 -1

2.3.4 Inverse Time, Directional Overcurrent Protection Elements 67-TOC, 67N- TOC .

Inverse time elements are dependent on the variant ordered . The y op er at e eith e r ac-

cording to the IEC - or the ANSI- standa rd or to a us er -d ef ine d ch ar ac te rist ic. Th e

curves and associated formulas are identical with those of the non-directional time

overcurrent protection and are given in the Technical Specifications. When the inverse

time curves are configure d, the definite time relay element s (67-2, 67-1) ar e available.

Pickup Behaviour Each phase and ground current is separately compared with the pickup values 67-

TOC PICKUP and 67N-TOC PICKUP of the respective relay elements. When a

current value exce eds the corresponding setting value by a factor of 1.1, the corre-

sponding phase picks up and a message is signalled phase-selectively assuming that

the fault direction is equal to the direction configured. If the inrush restraint feature is

applied, either the normal pickup signals or the corresponding inrush signals are

output as long as inrush current is detected. Pickup of a relay element is based on the

rms value of the fundamental harmonic. When the 67-TOC and 67N-TOC elements

pick up, the time delay of the trip signal is calculated using an integrating measure-

ment scheme. The calculated time delay is dependent on the actual fault current

flowing and the selected tripping curve. Once the time delay elapses, a trip signal is

issued assuming that no inrush current is detected or inrush restraint is disabled. If the

inrush restraint feature is enabled and an inrush condition exists, no tripping takes

place, but a message is recorded and displayed indicating when the overcurrent

element time delay elapses.

For ground current element 67N-TOC the characteristic may be selected independent-

ly of the characteristic used for phase currents.

Pickup values of element s 67-T OC and 67N-T OC and the associated time multipliers

may be individually set.

Dropout Behaviour When using an IEC or ANSI curve select whether the dropout of an element is to occur

instantaneously after the threshold has been undershot or whether dropout is to be

performed by means of the disk emulation. "Instantaneously" means that pickup drops

out when the pickup value of approx. 95 % of the set pickup value is undershot. For a

new pickup the tim e co un ter starts at zero.