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SENTRON
Switch disconnectors
3KD switch disconnector
Manual
10.2018
L1V30490761A
-02
Introduction
1
General information
2
Product description
3
Product line, product group
4
Function and operation
5
Assembly and mounting
6
Connection and wiring
7
Further accessories
8
Maintenance
9
Technical data
10
Dimension drawings and
hole drilling templates
11
Appendix
A
List of abbreviations
B
Conversion tables
C
Siemens AG
Division Energy Management
Postfach 32 20
91050 ERLANGEN
GERMANY
Document order number: 3ZW1012-0KD16-0AC1
Ⓟ
09/2018 Subject to change
Copyright © Siemens AG 2017.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 5
Table of contents
1 Introduction ................................................................................................................................................ 9
2 General information ................................................................................................................................. 11
2.1 General information ................................................................................................................ 11
3 Product description .................................................................................................................................. 13
3.1 Function, performance features, application areas ................................................................ 13
4 Product line, product group ...................................................................................................................... 15
4.1 3KD switch disconnector ........................................................................................................ 15
4.1.1 Frame sizes ............................................................................................................................ 16
4.1.2 Type of mounting .................................................................................................................... 17
4.1.3 Connection .............................................................................................................................. 18
4.1.4 Operating mechanism / handle ............................................................................................... 19
4.2 Accessories ............................................................................................................................. 21
4.2.1 Additional poles ....................................................................................................................... 21
4.2.2 Direct operating mechanism ................................................................................................... 22
4.2.3 Door-coupling rotary operating mechanism ............................................................................ 23
4.2.4 Auxiliary switches .................................................................................................................... 24
4.2.5 Phase barriers ......................................................................................................................... 25
4.2.6 Cable connection covers ........................................................................................................ 26
4.3 Exploded views ....................................................................................................................... 27
4.3.1 Exploded views for frame size 1 and 2 ................................................................................... 27
4.3.2 Exploded views for frame size 3, 4 and 5 ............................................................................... 28
4.4 Article number structure .......................................................................................................... 29
5 Function and operation ............................................................................................................................ 31
5.1 Manual operation .................................................................................................................... 31
6 Assembly and mounting .......................................................................................................................... 33
6.1 Assembly of parts in scope of delivery ................................................................................... 33
6.2 Mounting position .................................................................................................................... 34
6.3 Floor mounting ........................................................................................................................ 35
6.3.1 Frame size 1 and 2 ................................................................................................................. 35
6.3.2 Frame size 3 and 4 ................................................................................................................. 37
6.3.3 Frame size 5 ........................................................................................................................... 39
6.4 Mounting on DIN rails ............................................................................................................. 40
7 Connection and wiring ............................................................................................................................. 43
7.1 Main circuit connection ........................................................................................................... 43
7.1.1 Approved circuit diagrams ...................................................................................................... 43
7.1.2 Box terminal ............................................................................................................................ 45
7.1.3 Flat terminal ............................................................................................................................ 47
Table of contents
3KD switch disconnector
6 Manual, 10.2018, L1V30490761A-02
7.1.4 Connecting bridges ................................................................................................................ 50
7.1.5 Wiring accessories ................................................................................................................. 50
7.1.5.1 Phase barriers ........................................................................................................................ 50
7.1.5.2 Cable connection covers ........................................................................................................ 55
7.2 Auxiliary circuit connection ..................................................................................................... 57
7.2.1 Auxiliary switches ................................................................................................................... 57
7.2.1.1 Auxiliary switches of frame size 1 and 2 ................................................................................ 57
7.2.1.2 Auxiliary switches for frame size 3, 4 and 5 ........................................................................... 58
7.3 Contact numbers .................................................................................................................... 58
7.3.1 Main circuit ............................................................................................................................. 58
7.3.2 Auxiliary switches ................................................................................................................... 59
8 Further accessories ................................................................................................................................. 63
8.1 Auxiliary switches ................................................................................................................... 63
8.1.1 Installation of auxiliary switches ............................................................................................. 66
8.1.1.1 Frame sizes 1 and 2 .............................................................................................................. 66
8.1.1.2 Frame sizes 3, 4 and 5 .......................................................................................................... 67
8.1.2 Enabling / disabling of test function ....................................................................................... 69
8.1.2.1 Frame sizes 1 and 2 .............................................................................................................. 70
8.1.2.2 Frame sizes 3, 4 and 5 .......................................................................................................... 71
8.2 Additional poles ...................................................................................................................... 73
8.2.1 Versions of available poles .................................................................................................... 73
8.2.2 Possible assembly positions for additional poles and auxiliary switch modules ................... 74
8.2.2.1 Frame sizes 1 and 2 .............................................................................................................. 74
8.2.2.2 Frame sizes 3, 4 and 5 .......................................................................................................... 76
8.2.3 Assembly of additional poles ................................................................................................. 78
8.2.4 Removing the jumper at N terminal ....................................................................................... 82
8.3 Direct operating mechanism .................................................................................................. 84
8.3.1 Versions ................................................................................................................................. 84
8.3.2 Padlocking .............................................................................................................................. 85
8.3.3 Assembling ............................................................................................................................. 86
8.3.3.1 Frame sizes 1 and 2 .............................................................................................................. 86
8.3.3.2 Frame sizes 3, 4 and 5 .......................................................................................................... 88
8.4 8UD1 door-coupling rotary operating mechanism ................................................................. 90
8.4.1 Component overview ............................................................................................................. 91
8.4.2 Delivery forms and versions ................................................................................................... 92
8.4.3 Assembly ................................................................................................................................ 92
8.4.4 Functions and operation ...................................................................................................... 101
8.4.5 Accessories for 8UD1 .......................................................................................................... 111
9 Maintenance .......................................................................................................................................... 115
9.1 Maintenance ......................................................................................................................... 115
10 Technical data ....................................................................................................................................... 117
10.1 3-pole and 4-pole versions of 3KD switch disconnectors .................................................... 117
10.2 6 pole versions of 3KD switch disconnectors for DC 1200 V .............................................. 123
10.3 Technical data of accessories for 3KD ................................................................................ 127
10.3.1 Additional poles .................................................................................................................... 127
10.3.2 Auxiliary switches ................................................................................................................. 127
Table of contents
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 7
11 Dimension drawings and hole drilling templates .................................................................................... 129
11.1 Distance to grounded parts and between two 3KD .............................................................. 129
11.2 Drilling templates .................................................................................................................. 131
11.3 Dimensional drawings ........................................................................................................... 134
A Appendix ................................................................................................................................................ 155
A.1 Standards and approvals ...................................................................................................... 155
B List of abbreviations ............................................................................................................................... 157
B.1 Table of abbreviations .......................................................................................................... 157
C Conversion tables .................................................................................................................................. 159
Glossary ................................................................................................................................................ 163
Index ...................................................................................................................................................... 167
Table of contents
3KD switch disconnector
8 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 9
Introduction
1
Purpose of this manual
This manual describes the basic functions of the "switch disconnector" range of switching
devices.
It contains information about:
● Selection
● Configuring
● Commissioning
Target group
Planners, installation personnel, configuring engineers.
Required basic knowledge
A general knowledge of low-voltage controls and distribution is required to understand this
manual.
Used symbols
The following table explains the meaning of the various symbols used within this document:
Symbol
Meaning
Symbol
Meaning
Pincer pliers
File
Allen wrench
Touch handling
Crosstip screwdriver PZ
Lock
Hex tip screwdriver
Click to snap
Burin
Solid conductor
Introduction
3KD switch disconnector
10 Manual, 10.2018, L1V30490761A-02
Symbol
Meaning
Symbol
Meaning
Crosstip screwdriver PH
Stranded conductor
Slot screwdriver
Fine stranded conductor with end
sleeve
Trash bin Busbar
Cut off in the trash bin Dismantle of busbar
OK Dismantle of solid conductor
Not OK
Dismantle of solid conductor with
end sleeve
Measure
Dismantle of solid conductor with
end sleeve without insulating col-
lars
Handsaw
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 11
General information
2
2.1
General information
Definitions of switch disconnector
3KD switch disconnectors are used as main EMERGENCY-STOP or maintenance switches.
They ensure activation and deactivation of the specified rated current under load. At the
same time they
constitute
a safety isolation function and isolating distance in all low-voltage
circuits.
For standards, directives, certifications and environmental compatibility, please see appendix.
Safety note
DANGER
Hazardous voltage. Will cause death or serious injury.
Turn off and lock out all power supplying this device before working on this device.
NOTICE
Qualified personnel.
Installation and maintenance must be carried out by qualified personnel.
General information
2.1 General information
3KD switch disconnector
12 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 13
Product description
3
3.1
Function, performance features, application areas
Function
The 3KD switch disconnector is used to make, carry, and break rated currents up to 1600 A.
Performance features
● 3-pole and 4-pole versions for AC and DC applications
● 6-pole DC switch for high DC voltages
● 5 frame sizes from 16 A to 1600 A
● Modular retrofitting of additional poles(4th contact element, N or N-PE pole)
● Different operating mechanism designs
● Manual operation from the side or front
● Locking function for handle
● Floor mounting or mounting on standard mounting rail
Application areas
The 3KD switch disconnector is suitable for the following branches of industry:
● Process and basic industries
● Manufacturing industry
● Infrastructure ( building installations, supply and disposal)
● Mining
● Machine control
● ......
Installation points
3KD series products are primarily used in the following places:
● Distribution boards with standard system dimensions
● Cabinets
● Mounting plates (free assembly)
Product description
3.1 Function, performance features, application areas
3KD switch disconnector
14 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 15
Product line, product group
4
4.1
3KD switch disconnector
Frame size
1
2
3
4
5
Rated current I
n
(A)
16...63
80...200
200...400
500...800
1000...1600
Number of poles
3
✓
✓
✓
✓
✓
4
✓
✓
✓
✓
✓
6
✓
✓
✓
✓
✓
Operating mechanism
Front operation
✓
✓
✓
✓
✓
Side operation
✓
✓
✓
✓
✓
Type of mounting
Floor mounting
✓
✓
✓
✓
✓
Mounting on a standard
mounting rail
✓
✓
X
X
X
Connections
Flat terminal
X
✓
✓
✓
✓
Box terminal
✓
✓
X
X
X
Product line, product group
4.1 3KD switch disconnector
3KD switch disconnector
16 Manual, 10.2018, L1V30490761A-02
4.1.1
Frame sizes
3KD switch disconnectors are available in the following frame sizes:
● Frame size 1: 16 - 32 - 63 A
● Frame size 2: 80 - 100 - 125 - 160 - 200 A
● Frame size 3: 200 - 250 - 315 - 400 A
● Frame size 4: 500 - 630 - 800 A
● Frame size 5: 1000 - 1250 - 1600 A
Frame sizes
Frame size 1
Frame size 2
Frame size 3
Frame size 4
Frame size 5
Product line, product group
4.1 3KD switch disconnector
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 17
4.1.2
Type of mounting
Type of mounting
Frame size
Floor mounting
1, 2, 3, 4, 5
Mounting on a standard mounting rail 1, 2
Floor mounting
Mounting on a standard mounting rail
Product line, product group
4.1 3KD switch disconnector
3KD switch disconnector
18 Manual, 10.2018, L1V30490761A-02
4.1.3
Connection
Connection types
Connections
Frame size
Flat terminal
2, 3, 4, 5
Box terminal 1, 2
Frame size 1 and 2 are available with box terminals for connection of stripped conductors.
Frame size 2, 3, 4 and 5 are available with flat terminals for connection of cable lugs or
busbars.
①
Box terminal
②
Flat terminal
Product line, product group
4.1 3KD switch disconnector
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 19
4.1.4
Operating mechanism / handle
All frame sizes of 3KD are available for manual operation from the front or side.
Product line, product group
4.1 3KD switch disconnector
3KD switch disconnector
20 Manual, 10.2018, L1V30490761A-02
3KD with manual operation can be fitted with direct handles for operation directly at the
switch or with door coupling handles for operation from the outer side of a switchboard.
Note
3KD is available as complete units (including handle) only with direct operating mechanisms
from front side in gray color.
For other combinati
ons (red/yellow handles, door coupling handles or operation from the
side) 3KD basic units (w/o handle) and handle has to be ordered separately.
Product line, product group
4.2 Accessories
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 21
4.2
Accessories
4.2.1
Additional poles
All frame sizes of 3KD can be retrofitted with additional poles, e.g. for N or PE phase.
Available are a switching pole, an N/PE terminal (with fixed jumper) and N terminal (with
removable jumper).
Product line, product group
4.2 Accessories
3KD switch disconnector
22 Manual, 10.2018, L1V30490761A-02
4.2.2
Direct operating mechanism
Direct operating mechanisms are used if a 3KD shall be operated directly at the switch. They
are available for all frame sizes in the colors gray and red/yellow (for EMERGENCY-STOP
applications).
Every standard direct operating mechanisms can be locked with up to 3 padlocks. For frame
size 1 and 2 additional flat versions are available which can be locked only with one padlock,
but which needs no additional depth when locked.
Versions of direct operating mechanisms - example frame size 2
Direct operating mechanism,
standard version, gray
Direct operating mechanism,
standard version, red/yellow
Direct operating mechanism,
flat version, gray
Direct operating mechanism,
flat version, red/yellow
Product line, product group
4.2 Accessories
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 23
4.2.3
Door-coupling rotary operating mechanism
The door-coupling rotary operating mechanism enables operation of the switch disconnector
from the outside of the cabinet door.
8UD1 - modern handle design, new features. The 8UD1 door-coupling rotary operating
mechanism allows illumination of the front cover, and supports the test function for auxiliary
switches.
The door-coupling rotary operating mechanisms are available as complete units including
handle, coupling driver and 300 mm long shaft.
All parts are also available separately.
Exploded view of all components for 8UD1 as below:
①
Handle
②
Coupling driver with tolerance compensation
③
Coupling driver without tolerance compensation
④
Extension shaft
Product line, product group
4.2 Accessories
3KD switch disconnector
24 Manual, 10.2018, L1V30490761A-02
4.2.4
Auxiliary switches
Auxiliary switches are used to signal the switch position ON – OFF of the 3KD. Auxiliary
switches can be used with different switching instants (leading / simultaneously).
Simultaneously: Auxiliary switches at the same time as the main contacts of the 3KD.
Leading: When switching the 3KD from ON to OFF position, the auxiliary switches are
operated before the main contacts open.
For frame sizes 3, 4 and 5 the auxiliary contacts are snapped directly to the drive unit of the
3KD, for frame size 1 and 2 micro-switches are used which have to be assembled into
auxiliary switch modules.
Switching diagram for main contact, simultaneously and leading auxiliary switch as below:
①
Auxiliary switch of frame size 1 and 2
②
Auxiliary switch of frame size 3, 4 and 5
Product line, product group
4.2 Accessories
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 25
4.2.5
Phase barriers
Phase barriers are used between the terminals of 3KD with flat terminals. They increase
isolation between the contacts. Phase barriers have to be used under certain circumstances
(voltage level, switching category, assembly position of the switch). For details please see
chapter Phase barriers (Page 50)
Phase barriers on a 3KD, example frame size 2
Product line, product group
4.2 Accessories
3KD switch disconnector
26 Manual, 10.2018, L1V30490761A-02
4.2.6
Cable connection covers
Cable connection covers can be used on 3KD with flat terminals to provide touch protection.
Cable connection covers on a 3KD, example of frame size 2.
Note
Cable connection covers can also be assembled to the drive unit of a 3KD to get a
consistent design or to cover the wiring of auxiliary switches.
Product line, product group
4.3 Exploded views
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 27
4.3
Exploded views
4.3.1
Exploded views for frame size 1 and 2
①
3KD switch disconnector
⑥
Neutral conductor terminal (with
removable jumper)
② Direct operating mechanism (standard version)
⑦ Mounting bracket (spare part)
③
Direct operating mechanism (suitable for
distribution boards)
⑧
4th contact element
④ 8UD1 door-coupling rotary operating mechanism
⑨ Auxiliary switch module
⑤ N/PE terminal ( with permanent jumper)
⑩ Auxiliary switch
Product line, product group
4.3 Exploded views
3KD switch disconnector
28 Manual, 10.2018, L1V30490761A-02
4.3.2
Exploded views for frame size 3, 4 and 5
① 3KD switch disconnectors
⑥ Cable connection covers
② Direct operating mechanism
⑦ N/PE terminal (with permanent jumper)
③ 8UD1 door-coupling rotary operating mechanism
⑧ Neutral conductor (with removable jumper)
④ Phase barriers
⑨ 4th contact element
⑤ Cable connection covers, short
⑩ Auxiliary switch
Product line, product group
4.4 Article number structure
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 29
4.4
Article number structure
Article numbers for switches
①
Rated current Ith
④
Terminal
②
Number of poles
⑤
Frame size
③
Operation
⑥
Position of drive module
Article numbers for accessory
⑦
Suitable for frame size
⑨
Version of accessory
⑧
Kind of accessory
Product line, product group
4.4 Article number structure
3KD switch disconnector
30 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 31
Function and operation
5
5.1
Manual operation
Note
The manually operate
d 3KD can be operated with the direct handle for operation directly at
the switch or with the door
-coupling rotary operating mechanism for operation from outside
of the cabinet.
Details please see chapter
Accessories (Page 21).
Test position
In test position only the auxiliary contacts are operated, main contacts stay open.
To switch to test position
,
pull the lever and turn the handle counterclockwise.
Operation of "test lever" and switching to test as below:
3KD with direct operating mechanism
Function and operation
5.1 Manual operation
3KD switch disconnector
32 Manual, 10.2018, L1V30490761A-02
3KD with door-coupling rotary operating mechanism (8UD1 series)
Note
Function "test position" is only possible if the 3KD switch is equipped with a direct handle or
a door coupling handle of 8UD1 series.
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 33
Assembly and mounting
6
6.1
Assembly of parts in scope of delivery
Labels
The labels in the scope of delivery of every 3KD switch disconnector are intended to identify
the phases which are connected to the switching poles on the 3KD switch disconnectors.
Note
As an alternative to the supplied labels, also every other kind of label with the correct size
can be used.
Sizes:
Frame size
Max. label size [mm x mm]
1, 2
6.8 x 4.3
3, 4, 5 20 x 7.2
Assembly and mounting
6.2 Mounting position
3KD switch disconnector
34 Manual, 10.2018, L1V30490761A-02
6.2
Mounting position
Valid for all frame sizes.
WARNING
Fire hazard.
Some combinations of mounting position and load may cause flashovers between the
terminals if no phase barriers or cable connection covers are used.
Use phase barriers or cable connection covers if applicable according to chapter Phase
barriers (Page 50).
Assembly and mounting
6.3 Floor mounting
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 35
6.3
Floor mounting
6.3.1
Frame size 1 and 2
Mounting bracket are in the scope of delivery of the switch and have to be snapped into the
rear side of the switch.
Note
If the 3KD is assembled on a DIN rail, the mounting bracket d
o not have to be assembled.
Assembly and mounting
6.3 Floor mounting
3KD switch disconnector
36 Manual, 10.2018, L1V30490761A-02
Drilling template frame size 1 and 2
Frame
size
Poles
Terminal
A [mm]
B [mm]
C [mm]
D [mm]
E [mm]
F [mm]
1
3
Box terminal
94
109
119.6
46.5
119
M4
4
112
127
137.6
46.6
119
M4
6
148
163
173.6
46.5
119
M4
2
3
Box terminal
121
136
146.6
46.5
126
M4
Flat terminal 121 136 146.6 46.5 130 1) M4
4
Box terminal
148
163
173.6
46.5
126
M4
Flat terminal 148 163 173.6 46.5 130 1) M4
6
Box terminal
202
217
227.6
46.5
126
M4
Flat terminal
202
217
227.6
46.5
130
1)
M4
1) Without phase barriers
Note
Scale
The drilling template is not in scale 1:1.
Assembly and mounting
6.3 Floor mounting
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 37
6.3.2
Frame size 3 and 4
Frame size
3 M4 2.0 ... 2.5 Nm 3.0 mm
4
M6
5.0 ... 6.0 Nm
5.0 mm
The mounting bracket can be used in horizontal or vertical alignment to adjust them to the
dimension of the mounting location.
Frame size
3
PH1
0.9 ... 1.1 Nm
4
PH2
2.7 ... 3.3 Nm
Assembly and mounting
6.3 Floor mounting
3KD switch disconnector
38 Manual, 10.2018, L1V30490761A-02
Drilling template frame size 3 and 4
Frame
size
Poles
A [mm]
B [mm]
C [mm]
D [mm]
E [mm]
F 1) [mm]
G [mm]
H [mm]
J [mm]
K 2) [mm]
3
3
167
190
200
208
65
100
110
118
M4
-
4
211
234
244
252
65
100
110
118
M4
-
6 299 323 332 340 65 100 110 118 M4 35
4
3
228
260
279
291
93
145
161
173
M6
-
4 288 320 339 351 93 145 161 173 M6 -
6
408
440
459
471
93
145
161
173
M6
48
1)
Dimension of the body of the switch (without phase barriers and terminal bars)
2) Only for 6-pole versions
Note
Scale
The drilling template is not in scale 1:1.
Assembly and mounting
6.3 Floor mounting
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 39
6.3.3
Frame size 5
Drilling template for frame size 5
①
Dimension of the body of the switch (without phase barriers and terminal bars)
C is the distance of the inner mounting bracket
Poles
A [mm]
B [mm]
C 2) [mm]
3
340
382
-
4
430
472
-
6
610
652
70
2) Only for 6-pole versions
Note
Scale
The drill
ing template is not in scale 1:1.
Assembly and mounting
6.4 Mounting on DIN rails
3KD switch disconnector
40 Manual, 10.2018, L1V30490761A-02
6.4
Mounting on DIN rails
Mounting on DIN rail-- Frame sizes 1 and 2
Dismounting from DIN rail-- Frame sizes 1 and 2 with front operation
Assembly and mounting
6.4 Mounting on DIN rails
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 41
Disassembly from DIN rail - Frame sizes 1 and 2 with side operation from left side
Note
The mounting bracket whi
ch are in the scope of delivery of the switch are not necessary for
mounting on DIN rails.
Position of release hooks
Assembly and mounting
6.4 Mounting on DIN rails
3KD switch disconnector
42 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 43
Connection and wiring
7
7.1
Main circuit connection
The connections of the main conductors for the various frame sizes are described below:
● Tools to be used
● Tightening torque range
● Permissible conductor cross-sections
7.1.1
Approved circuit diagrams
The following circuits are approved
AC applications
AC applications, 3 pole
AC applications, 4 pole
Note
4th pole is optional accessory.
Options for additional poles
DC applications
DC applications, 2 series-connected switching poles - max. 220 V DC
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
44 Manual, 10.2018, L1V30490761A-02
DC applications, 3 series-connected switching poles - max. 440 V DC
Typical circuit diagrams for 3KD 6-pole for DC applications up to 1200 V, all sizes in which 3
of the 6 poles in each case are to be connected in series using the connecting bridges.
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 45
7.1.2
Box terminal
Frame size
1
5.0 ... 6.5 Nm
2
6.5 ... 8.0 Nm
To get access to the
screw of the terminal, the integrated cover has to be slided by the tip of
the tool (show as step 1).
Box terminals of 3KD are designed to connect one round cable and one bar (massive copper
or flexibar) at the same time.
Stripping insulation
Frame size
A [ mm ]
1 15
2
18
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
46 Manual, 10.2018, L1V30490761A-02
Technical data - box terminal
Frame size
1
2
Cable type Cable material
Tool
Conductor
cross-section
[ mm / mm² ]
Tool
Conductor
cross-section
[ mm / mm² ]
CU
4 mm,
5.0 ... 6.5 Nm
1 x 1…16
4 mm,
6.5 ... 8.0 Nm
1 x 2.5…16
CU 1 x 6…35 1 x 10…70
CU 1 x 1…35 1 x 2.5…70
CU 2 x 9 1) 3 x 14 1)
CU 1 x 1…16 + 2 x 9 1 x 2.5 … 16 + 3 x 14
CU 1 x 6…35 + 2 x 9 1 x 10 … 70 + 3 x 14
1)
Attention: When the number of layers multiplied with thickness of layer of flexible copper bars are exactly the allowed
maximum thickness of the terminal it could be the case that it does not fit to the terminal because in practice the flexibar
is a little bit thicker – e.g. a flexibar with 4 layers of 0.5 could be thicker than 2 mm.
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 47
7.1.3
Flat terminal
Frame sizes 2, 3 and 4
Frame size 5
WARNING
Fire hazard.
Incorrect connection of cables may cause the risk of flashovers between the terminals.
• Terminal screw has to have the correct alignment – nuts on top.
• Frame size 5: If only one of the two holes in the connecting lug is used - always the
same side has to be used (holes on the left or right side).
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
48 Manual, 10.2018, L1V30490761A-02
Dimensions for drilling of busbars
Frame sizes 2, 3 and 4
Frame size 5
Frame size
A [mm]
B [mm]
C [mm]
D [mm]
2
< 10
-
-
9
3
< 15.5
-
-
11
4
< 21
-
-
14
5
< 19
23 ... 29
13
14
Technical data – flat terminal
Frame size
2
Up to 160 A
2
200 A
Cable type Cable
material
Tool
Conductor
cross-section
[mm / mm²]
Tool
Conductor
cross-section
[ mm / mm² ]
DIN ISO
46234
CU
13 mm,
15 … 22 Nm
1 x 2.5 … 95
2 x 2.5 … 50
13 mm,
15 … 22 Nm
1 x 2.5 … 95
DIN ISO
46235
CU 1 x 25 … 70
2 x 25 … 50 -
CU 1 x 15 x 3
1 x 20 x 3
1 x 20 x 3
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 49
Frame size
3
4
5
Cable type Cable
material
Tool
Conductor
cross-section
[mm / mm²]
Tool
Conductor
cross-section
[mm / mm²]
Tool
Conductor
cross-section
[mm / mm²]
DIN ISO
46234
CU
16 mm,
30 … 44 Nm
1 x 6 … 240
2 x 6 … 150
18 mm,
50 … 75 Nm
1 x 25 … 240
2 x 25 … 240
18 mm,
50…75 Nm
1 x 120 … 240
2 x 95 … 240
DIN ISO
46235
CU 1 x 16 … 185
2 x 16 … 150
1 x 25 … 240
2 x 25 … 240
1 x 120 … 185
2 x 95 … 185
CU
1 x 20 x 3
1 x 25 x 3
1 x 30 x 4
1 x 30 x 10
1 x 30 x 10
1 x 40 x 10
2 x 40 x 5
-
CU - -
2 x 50 x 6
2 x 40 x 10
2 x 60 x 10
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
50 Manual, 10.2018, L1V30490761A-02
7.1.4
Connecting bridges
For DC switches connecting bridges are available which connect two terminals.
①
Connecting bridge for box terminal, example
size 2
②
Connecting bridge for flat terminal, example
size 2
For tool size and torque, please see charts in chapters of Box terminal (Page 45) and Flat
terminal (Page 47)
7.1.5
Wiring accessories
7.1.5.1
Phase barriers
Phase barriers are used at 3KD with flat terminals for additional isolation between the
terminals. They prevent interphase arcing during switching.
Background:
During switching of the 3KD, it has to extinguish the electric arc in the contact modules. The
arc produces conductive gases, which are blown out of the contact modules. If there are too
many of these conductive gases a short circuit between the terminals can occur.
The following table shows under which circumstances an isolation between the terminals is
necessary to prevent short circuits between the terminals. This isolation can be implemented
by using phase barriers.
Note
3KD size 2 has phase barriers in scope of delivery.
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 51
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
52 Manual, 10.2018, L1V30490761A-02
Assembly of phase barriers
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 53
Assembly positions of phase barriers
3KD, front operation, 3-pole, drive module on left side
3KD, front operation, 3-pole, drive module in
center position
3KD, front operation, 4-pole, drive module in center
position
3KD, side operation
Note
On position "A" assembly of a phase barrier is only necessary if another device with non
-
isolated contacts or a grounded metal part is located directly next to the 3KD, e.g. another
switch with
non-isolated terminals or a cabinet side wall.
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
54 Manual, 10.2018, L1V30490761A-02
Minimum distance to end of non-isolated part of cable lug
Phase barriers need a minimum distance from the end of the phase barrier to the end of the
non-isolated part of the installed cable lugs.
Frame size
A [ mm ]
2
≥ 4
3, 4, 5
≥ 7
Shortening of phase barriers
The phase barriers can be shortened according to the available space in the application.
Frame size
A [ mm ]
B [ mm ]
C [ mm ]
2 44 60 73
3
-
76.5
106.5
4
-
86
122
5
-
-
135
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 55
7.1.5.2
Cable connection covers
Cable connection covers are used on 3KD with flat terminals if touch protection is required.
Note
Cable connection covers fulfill the same functionality as phase barriers.
If additional touch
protection of the terminals is necessary, cable connection covers can be used instead of
phase barriers. It is not possible to use phase barriers and cable connection covers at the
same time.
Connection and wiring
7.1 Main circuit connection
3KD switch disconnector
56 Manual, 10.2018, L1V30490761A-02
Cable connection covers for connecting bridges
For DC switches which are using connecting bridges, versions of cable connection covers
which cover two terminals including the bridging bar are available.
Note
Cable connection covers can also be assembled on the drive module of the 3KD switch.
The following images show the additional functionality of cable connection covers. For
example, they can be used if an integrated design is desired, or if assembled auxiliary
switches (frame sizes 3, 4 and 5) should be covered.
Connection and wiring
7.2 Auxiliary circuit connection
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 57
7.2
Auxiliary circuit connection
7.2.1
Auxiliary switches
For more information about assembling the auxiliary switches, please see chapter of
Auxiliary switches (Page 63).
7.2.1.1
Auxiliary switches of frame size 1 and 2
Auxiliary switches for frame size 1 and 2 are available in two different versions:
With cable
These are delivered with soldered 50 cm long cables. If longer wiring is necessary, terminal
blocks have to be used.
Conductor cross-section of the soldered cables is AWG18 / 0.82 mm².
Without cable
These are delivered with 3 pcs of blade terminals and 3 pcs of identification tubes.
The blade terminals can be used with conductor cross-section from 0.5 - 1.5 mm² (22-
16AWG) mm².
The identification tubes can be placed on the cables for easy identification of the auxiliary
switch pins. They can be fixed with a hot-air gun (heat shrink tube).
①
Version with cable
②
Version without cable
Connection and wiring
7.3 Contact numbers
3KD switch disconnector
58 Manual, 10.2018, L1V30490761A-02
7.2.1.2
Auxiliary switches for frame size 3, 4 and 5
3KD
frame size 3, 4 and 5 uses contact elements from the 3SU1 pushbutton range as
auxiliary switches.
7.3
Contact numbers
This chapter describes contact numbers for wiring plans.
7.3.1
Main circuit
For identification of the main terminals in wiring plans, every 3KD switch and also additional
poles have corresponding labels in the scope of delivery.
As an alternative to the supplied labels it is possible to use labels that are suitable for use in
an industrial environment (e.g. heat resistance). For further information see chapter
Assembly of parts in scope of delivery (Page 33)
Connection and wiring
7.3 Contact numbers
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 59
7.3.2
Auxiliary switches
Every contact number consists of two digits, the first digit is printed on the drive module of
the 3KD switch (frame size 3, 4 and 5) or the auxiliary switch module (frame size 1, 2).
The second digit is printed on the auxiliary switch.
The first digit of auxiliary switch contact number:
Frame size 3
Frame size 4, 5
Note
If a single
-pole auxiliary switch is assembled, only the numbers in the first line are used. If a
double
-pole auxiliary switch is assembled the upper line of numbers on the drive module is
used for the upper contact in t
he auxiliary switch, the lower line for the lower contact of
auxiliary switch module.
Connection and wiring
7.3 Contact numbers
3KD switch disconnector
60 Manual, 10.2018, L1V30490761A-02
①
Frame size 1, 2, Auxiliary switch module, standard version
②
Frame size 1, 2, Auxiliary switch module, versions with test function or leading switching instant
Note
The auxiliary switch module standard version is printed with two sets of num
bers for the first
digit because it is possible to use two of these modules on one 3KD switch. The left number
shall be used if only one of the modules is used, the right number if a second module is
installed.
Connection and wiring
7.3 Contact numbers
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 61
Second digit of auxiliary switch contact number:
Frame size 1, 2
①
Frame size 3, 4, 5, Single-pole auxiliary switch (3SU1400-1AA10-1BA0)
②
Frame size 3, 4, 5, Double-pole auxiliary switch (3SU1400-1AA10-1FA0)
Connection and wiring
7.3 Contact numbers
3KD switch disconnector
62 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 63
Further accessories
8
8.1
Auxiliary switches
Purpose of the auxiliary switches
Auxiliary switches are used to signal the switch position of the main contacts of the 3KD.
They can be retrofitted if required.
Switching instant of the auxiliary switches
You can set different switching instant (leading / simultaneously) for the auxiliary switches,
please refer to the chapter Installation of auxiliary switches (Page 66)
Note
Simultaneous switching means that the main contacts of the 3KD and auxiliary switch
contacts are switching in a tole
rance of < 5 ms.
Test function
3KD supports a test function for auxiliary switches. The test function is allowed to operate
the auxiliary switches in the OFF position of the 3KD switch without the need for closing of
the main contacts.
The test function can be used to check the correct wiring of auxiliary contacts during placing
a machine into operation.
To prevent accidental switching to the "test" position during operational switching from ON to
OFF
,
the test position is blocked. To be able to switch to test, a lever has to be operated.
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
64 Manual, 10.2018, L1V30490761A-02
Switching to test position
3KD with direct operating mechanism
3KD with door-coupling rotary operating mechanism, 8UD1 series
Note
•
The test function is only possible on 3KD with operation from the front. With frame sizes 1
and 2, test function is only possible for switch versions where the drive module is not in
the center position. 3KD with side wall operation does not support the test function for
auxiliary switches. On this device a door-
coupling rotary operating mechanism without the
inscription "Test" has to be used.
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 65
Overview - availability of test function and switching times for auxiliary switches
Frame size
Operation
Kind of handle
Test function
Switching time
Simultaneously
Leading
1, 2
Front, drive module on left side
Direct
Yes
Yes
Yes
8UD1
Yes
Yes
Yes
Front, drive module in center position Direct No Yes No
8UD1
No
Yes
No
Side operated versions 8UD1 No Yes Yes
3, 4, 5
Front, drive module on left side
Direct
Yes
Yes
Yes
8UD1
Yes
Yes
Yes
Front, drive module in center position
Direct
Yes
Yes
Yes
8UD1
Yes
Yes
Yes
Side operated versions
8UD1
No
Yes
Yes
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
66 Manual, 10.2018, L1V30490761A-02
8.1.1
Installation of auxiliary switches
8.1.1.1
Frame sizes 1 and 2
Frame sizes 1 and 2 use micro-switches as auxiliary switches with a changeover contact,
(NO/NC) which are snapped into an auxiliary switch module.
In every auxiliary switch module up to two auxiliary switches can be assembled. The
auxiliary switch modules are assembled to the sides of the 3KD switch in the same way as
an additional pole – for assembling the auxiliary switch modules refer to chapter of Assembly
of additional poles (Page 78).
①
Assembling of auxiliary switch
②
Disassembling of auxiliary switch
Test function, switching instant setting
With frame sizes 1 and 2, the functionality of the auxiliary switches is adjusted by using the
corresponding version of auxiliary switch module:
Version
Article number
Switching instant
Test function
Simultaneously
Leading
Standard
3KD9103-5
Yes
No
No
With test function
3KD9103-6
Yes
No
Yes
Leading and test function
3KD9103-7
No
Yes
Yes
Note
Auxiliary switch modules 3KD9103
-6 and 3KD9103-7 can only be assembled directly next to
the drive module of the 3KD switch. Please also refer to chapter of
Assembly of additional
poles
(Page 78).
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 67
8.1.1.2
Frame sizes 3, 4 and 5
Frame sizes 3, 4 and 5 uses contact elements of series 3SU1 as auxiliary switches, which
are snapped onto the drive module of the 3KD switch.
①
Assembling of auxiliary switch
②
Disassembling of auxiliary switch
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
68 Manual, 10.2018, L1V30490761A-02
Assembly positions
3KD frame size 3 is allowed to assemble up to three auxiliary switches, frame sizes 4 and 5
up to four auxiliary switches.
①
Assembling positions for frame size 3
②
Assembling positions for frame size 4 and 5
Test function
When the 3KD is switched to test position, the auxiliary switches at all possible assembly
positions are actuated – ①, ②, ③ and ④ (④ only at frame size 4 and 5).
Note
Test function is not supported by all versions of 3KD. Details please see chapter
Auxiliary
switches
(Page 63).
Switching instant setting
Auxiliary switches which are assembled to position ① have leading switching instant.
Auxiliary switches which are assembled to position ②, ③ or ④ (④ only with frame size 4
and 5) have simultaneously switching instant.
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 69
8.1.2
Enabling / disabling of test function
Test function is possible on certain combinations of 3KD switch and handle:
3KD version
Assembled handle
Test function
Operated from front
Direct handle
Yes
8UD1 door-coupling rotary operating mechanism Yes
Operated from the side
8UD1 door-coupling rotary operating mechanism
No
Note
•
3KD with operation from the side does not support the test function in general, disabling
of the test function is not necessary.
•
3KD with operation from the side, the correct version of the door-coupling rotary
operating mechanism has to be used (with inscription O-I, without inscription "Test").
•
If the test function is not required, it is also possible to disable it when an
8UD1 door-
coupling rotary operating mechanism is used on a 3KD with operation from the front.
Make sure to use the correct version of the 8UD1 in this case (without inscription "Test").
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
70 Manual, 10.2018, L1V30490761A-02
8.1.2.1
Frame sizes 1 and 2
1. Remove the screw (which is used to fix the shaft of a door-coupling rotary operating
mechanism).
2. Remove the cover on the drive module.
3. Remove the test function blocking pin for enabling the test function.
Reassemble the cover and screw if a door-coupling rotary operating mechanism is used or
assemble the direct handle (cover and screw are not necessary).
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 71
8.1.2.2
Frame sizes 3, 4 and 5
Frame size
3
2.0 mm
4
2.5 mm
5
3.0 mm
Remove the screw which is used to fix the shaft of a door-coupling rotary operating
mechanism
Remove the shaft fixing ring
Remove the cover on the drive module.
Further accessories
8.1 Auxiliary switches
3KD switch disconnector
72 Manual, 10.2018, L1V30490761A-02
Remove the blocking pin for enabling the test function.
Reassemble the cover, ring and screw if a door-coupling rotary operating mechanism is used
or assemble the direct handle (cover and screw are not necessary).
Further accessories
8.2 Additional poles
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 73
8.2
Additional poles
8.2.1
Versions of available poles
Example: frame size 3 with flat terminal.
①
4th contact element
③
N terminal
②
N/PE terminal
④
Auxiliary switch module (size 1 and 2)
4th contact element
Additional pole with contact element inside – it has the same functionality like the contact
poles which are assembled to a 3KD switch. The 4th pole is intended to expand a 3-pole
3KD to a 4-pole version if the N phase shall be switched.
N/PE terminal
Additional pole without switching functionality, with fixed connection between the upper and
lower terminal of the pole. The N/PE terminal is intended to expand a 3KD switch with a
connection possibility for Neutral or Protective Earth phase.
N terminal
Additional pole without switching functionality, with connection between the upper and lower
terminal of the pole. The connection between the terminals can be opened by unscrewing
the jumper. The N terminal is intended to expand a 3KD switch with a connection possibility
for Neutral phase if it is wished to have the possibility to unconnect N (e.g. for maintenance),
but not wished to switch N.
Auxiliary switch module (for size 1 and 2)
They are used for frame sizes 1 and 2 to assemble auxiliary switches to the 3KD.
Further accessories
8.2 Additional poles
3KD switch disconnector
74 Manual, 10.2018, L1V30490761A-02
8.2.2
Possible assembly positions for additional poles and auxiliary switch modules
8.2.2.1
Frame sizes 1 and 2
4th pole
Neutral terminal
N/PE terminal
Auxiliary switch module Standard
Auxiliary switch module with test function
Auxiliary switch module with leading NO contact and test
function
Note
①
The side operated 3KD frame size 1 and 2 have a wider side cover next to the drive
module, with an integrated assembly place for one auxiliary switch. This auxiliary switch
supports early break switching time.
Further accessories
8.2 Additional poles
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 75
6-pole 3KD for DC applications:
Note
•
A 3KD switch for AC applications can have a m
aximum of 4 switched contact elements, a
4th pole can only be used on a 3-pole 3KD.
•
It is possible to use one additional pole or auxiliary switch module on each side of a front
operated 3KD.
•
It is possible to use one additional pole or auxiliary switch module on the side opposite of
the drive module of a side operated module.
•
Auxiliary switch modules have two sets of screws in the scope of delivery. The self-
tapping screws are used if the module is assembled to a 3KF switch disconnector with
fuses, for 3KD the screws with thread have to be used.
•
Auxiliary switch modules with test function or with leading NO and test function can only
be used directly next to the drive module of the 3KD.
•
Additional poles have two sets of screws in the scope of delivery. The shorter screws are
used if only the additional pole shall be assembled, and the longer screws have to be
used if an additional pole and an auxiliary switch module are assembled.
Long screw
Short screw
Further accessories
8.2 Additional poles
3KD switch disconnector
76 Manual, 10.2018, L1V30490761A-02
8.2.2.2
Frame sizes 3, 4 and 5
4th pole
Neutral terminal
N/PE terminal
Further accessories
8.2 Additional poles
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 77
6-pole 3KD for DC applications:
NOTICE
Damage to property.
Risk of malfunction or damaging the device.
A 3KD switch for AC applications can have a maximum of 4 switched contact elements, a
4th pole can only be used on a 3-pole 3KD.
Note
•
It is possible to use one additional pole on each side of a front operated 3KD.
•
It is possible to use one additional pole on the side opposite of the drive module of a side
operated 3KD.
Further accessories
8.2 Additional poles
3KD switch disconnector
78 Manual, 10.2018, L1V30490761A-02
8.2.3
Assembly of additional poles
Remove the side cover from 3KD on the side of the switch on which the additional pole shall
be assembled.
Frame size 1, 2, 3
Frame size 4, 5
Frame size
4
PH2
5
PH3
Turn the shaft of the additional pole to the right position for the assembly to the 3KD.
N and N/PE terminal, auxiliary switch (frame sizes 1 and 2)
Further accessories
8.2 Additional poles
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 79
4th pole
Frame size 1 and 2:
For auxiliary switch modules and N and N/PE poles of frame size 1 and 2, two lines on the
housing and shaft have to be aligned. The 4th pole has to be turned clockwise until no
further turning is possible.
Frame size 3, 4 and 5:
4th pole has to be turned clockwise until no further turning is possible. N and N/PE poles
need no alignment.
Place the additional pole on the 3KD switch. The additional pole has to be fitted directly to
the 3KD (without a gap between switch and additional pole).
Further accessories
8.2 Additional poles
3KD switch disconnector
80 Manual, 10.2018, L1V30490761A-02
Reassemble the side cover with the longer screws which are in the scope of delivery of the
additional pole.
Frame sizes 1, 2, 3
Frame sizes 4, 5
Frame size
4
PH2
0.5 ... 0.7 Nm
5
PH3
0.7 ... 0.9 Nm
Further accessories
8.2 Additional poles
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 81
Assembly of two modules on one side of the switch
3KD frame sizes 1 and 2 allow the usage of two modules on one side of the switch (see
chapter Frame sizes 1 and 2 (Page 74)). For this kind of assembly the additional poles have
two sets of screws with different lengths in the scope of delivery.
The short version of screw is used if the additional pole is used, the longer version is used if
an additional pole is used in combination with an auxiliary switch module.
The scope of delivery of the additional poles includes labels which can be used to identify
the phase type (N, PE).
Further accessories
8.2 Additional poles
3KD switch disconnector
82 Manual, 10.2018, L1V30490761A-02
8.2.4
Removing the jumper at N terminal
Removing the jumper
3KD frame size
1
With box terminal
3 mm
2
With flat terminal
3 mm
With box terminal
4 mm
3 With flat terminal 5 mm
4, 5
With flat terminal
6 mm
Further accessories
8.2 Additional poles
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 83
Reassembling the jumper
3KD frame size
1
With box terminal
3 mm
1.3 ... 1.7 Nm
2
With flat terminal
3 mm
1.3 ... 1.7 Nm
With box terminal
4 mm
1.9 ... 2.5 Nm
3 With flat terminal 5 mm 3.0 ... 5.0 Nm
4
With flat terminal
6 mm
5.0 ... 7.0 Nm
5
With flat terminal
6 mm
7.0 ... 9.0 Nm
Further accessories
8.3 Direct operating mechanism
3KD switch disconnector
84 Manual, 10.2018, L1V30490761A-02
8.3
Direct operating mechanism
8.3.1
Versions
Direct operating mechanism,
standard version, gray
Direct operating mechanism,
standard version, red/yellow
Direct operating mechanism,
flat version, gray
Direct operating mechanism,
flat version, red/yellow
Note
Handles in red/yellow color are used for EMERGENCY
-STOP applications, and gray
h
andles for all other applications.
•
The standard version of direct operating mechanism can be padlocked with up to 3
padlocks, but needs additional depth when padlocked.
•
The flat version of direct operating mechanism can be padlocked with one padlock, but
needs no additional depth when padlocked.
•
The flat versions of direct operating mechanism are available for frame sizes 1 and 2.
Further accessories
8.3 Direct operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 85
8.3.2
Padlocking
3KD switches can be padlocked in OFF position.
Standard version of the direct operating mechanism
Frame size
Ø [ mm ]
1, 2, 3
4 ... 6
4, 5
4 ... 8
Flat version of the direct operating mechanism
Further accessories
8.3 Direct operating mechanism
3KD switch disconnector
86 Manual, 10.2018, L1V30490761A-02
8.3.3
Assembling
8.3.3.1
Frame sizes 1 and 2
Remove the screw which is intended to tighten the shaft of a door-coupling rotary operating
mechanism.
Remove the front cover from the drive module.
Remove the test function blocking pin – for further information see chapter Auxiliary switches
(Page 63)
Further accessories
8.3 Direct operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 87
Snap the direct operating mechanism onto the 3KD
Note
•
The snapping mechanism of the direct handle´s cover fits strongly inside the drive
module to prevent accidental loosening of the handle during operational switching of the
3KD. It is not possible to disassemble the cover, so please make sure to assemble the
desired version of the direct handle.
•
The handle can also be released from the 3KD.
Further accessories
8.3 Direct operating mechanism
3KD switch disconnector
88 Manual, 10.2018, L1V30490761A-02
8.3.3.2
Frame sizes 3, 4 and 5
Remove the screw and the metal ring which are intended to tighten the shaft of a door-
coupling rotary operating mechanism.
Frame size
3
2.0 mm
4 2.5 mm
5
3.0 mm
Remove the front cover from the drive module.
Remove the test function blocking pin – for further information see chapter Auxiliary switches
(Page 63)
Further accessories
8.3 Direct operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 89
Screw the handle to the 3KD
Frame size
3
PH1
0.25 ... 0.35 Nm
4
PH2
0.7 ... 0.9 Nm
5 PH3 0.9 ... 1.1 Nm
Note
The handle can also be released from the 3KD.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
90 Manual, 10.2018, L1V30490761A-02
8.4
8UD1 door-coupling rotary operating mechanism
The door-coupling rotary operating mechanism enables operation of the switch disconnector
from the outside of the cabinet door.
Note
Door
-coupling rotary operating mechanism can only be retrofitted to 3KD without factory
assembled direct handle.
Retrofitting to 3KD with factory assembled direct handle is not possible.
8UD1 Series
Modern design of the handles identical with the handles which are used on the new range of
3VA MCCBs.
● Locking function at the handle with padlocks.
● Switching symbols in the handle can be illuminated.
● Test function of auxiliary switches is supported.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 91
8.4.1
Component overview
①
Handle (including front cover, gasket and screws for fixing in front door)
②
Labeling plate
③
Coupling driver with tolerance compensation
④
Coupling driver without tolerance compensation
⑤
Extension shaft
⑥
Shaft coupling
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
92 Manual, 10.2018, L1V30490761A-02
8.4.2
Delivery forms and versions
8UD1 is available as a ready-to-assemble complete unit.
This includes a handle without illumination, coupling driver with tolerance compensation and
300 mm long extension shaft.
All components are also available separately, shafts are available in 300 mm and 600 mm
length, handles are available in illuminated and non-illuminated versions.
8.4.3
Assembly
Drilling template for cabinet door
Frame size
A [ mm ]
B [ mm ]
C [ mm ]
D [ mm ]
1, 2
65
10.5
Ø 30
Ø 4.5
3, 4, 5
88
13.5
Ø 65
Ø 5.5
Note
Scale
The drill
ing template is not in scale 1:1.
Note
Illuminated 8UD1
The hole diameter of 3 mm is only necessary if an illuminated version of 8UD1 is used.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 93
Note
Placement of the shaft
Alignment of center hole and the cabinet door (shaft), to the position of the
3KD switch
disconnector inside the cabinet can be found in the 3KD dimension drawings. Please see
chapter
Drilling templates (Page 131).
The distance from the center hole in the cabinet door to the hinge of the cabinet door has to
be 80 mm or more.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
94 Manual, 10.2018, L1V30490761A-02
Assembling the handle to the door
The following modification of the handle can only be performed, as long as the handle is not
assembled to the cabinet door:
● Disabling of door interlock.
● Enabling of padlocking in ON position.
● Assembly of labelling plate.
If you want to use these functions / accessories, you should do the necessary steps before
continue with assembling of the handle to the door. For details about above features /
accessories see chapter Functions and operation (Page 101), and Accessories for 8UD1
(Page 111).
Frame size
1, 2
PZ2
1.1 ... 1.3 Nm
3, 4, 5
2.1 ... 2.4 Nm
Note
8UD1 handles can be used in doors with a thickness between 2.0 and 5.5 mm. The 24 V DC
p
ower supply cable is only relevant if an illuminated version of the 8UD1 handle is used.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 95
Calculating the length of the shaft/cutting the shaft
Front operated 3KD
X = Distance from outside of the cabinet door to mounting plate for the 3KD switch
(according to the dimension of the used cabinet)
Length of the shaft
Frame size of
3KD
Coupling driver
With tolerance compensation
Without tolerance compensation
A [mm]
Tolerance
B [mm]
A [mm]
Tolerance
B [mm]
1, 2
X - 96
+ 5
X - 111
X - 54
+ 5
X - 69
3
X - 99.5
+10
X - 136.5
X - 57.5
+10
X - 94.5
4
X - 103
+10
X - 153
X - 61
+10
X - 111
5
X - 117.5
+10
X - 195.5
X - 75.5
+10
X - 153.5
Min. distance from mounting plate to front of door X
Frame size of 3KD
Min. distance X [mm]
1, 2
138.5
3
169
4
185.5
5
228
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
96 Manual, 10.2018, L1V30490761A-02
Side operated 3KD
X = Distance from inside of the cabinet side wall to outer side of the 3KD switch (according
to the location of the 3KD inside of the cabinet)
Length of the shaft
Frame size of 3KD
A [mm]
Tolerance
B [mm]
1, 2
X + 14
+ 5
X - 1
3
X + 20
+10
X - 1
4
X + 34
+10
X - 1
5
X + 53
+10
X - 1
Min. distance X from switch to outside of side wall:
Frame size of 3KD
Min. distance X [mm]
1, 2
28.5
3, 4, 5
33.5
Note
On 3KD with side operation only coupling drivers without tolerance compensation can be
used.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 97
①
Mark dimension B at the shaft
②
Cut the shaft to length A
③
Deburr the cut edges of the shaft to ensure proper assembly
As for the letter A and B, please see the content of "cutting the shaft" in this chapter.
Fix the coupling driver to the shaft.
Move the shaft into the coupling driver as far as it will go.
Fix the shaft to the 3KD.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
98 Manual, 10.2018, L1V30490761A-02
Move the shaft into the 3KD up to marking B.
Frame size 1 and 2
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 99
Frame size 3, 4 and 5
Frame size
Front operation
Side operation
3
2.0 mm
1.5 ... 2.0 Nm
3.0 mm
2.0 ... 2.5 Nm
4
2.5 mm
4.0 ... 4.5 Nm
4.0 mm
6.0 ... 6.5 Nm
5 3.0 mm 7.0 ... 7.5 Nm 5.0 mm 8.5 ... 9.0 Nm
Close the cabinet door carefully the first time to check correct alignment between 8UD1
handle and 3KD switch.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
100 Manual, 10.2018, L1V30490761A-02
NOTICE
Damage to property.
Risk of damaging the device.
When the cabinet door is opened, the 8UD1 coupling head is deflected downwards a little
bit. This deflection is caused by tolerances between the 8UD1 shaft and the fixing point at
3KD and by tolerances where the 3KD is assembled inside the cabinet.
In typical applications the cone on the backplate of the handle ensures that the coupling
head hooks into the handle mechanism, even when deflected.
If 3KD is assembled onto DIN rails and shafts longer than 300 mm are used, it may be the
case that the deflection of the coupling head is too wide and the cabinet cannot be closed
or the 8UD1 mechanism can be damaged. In this case the 8UD1 shaft can be supported by
an internal structure of the cabinet (to eliminate deflection) or the accessory "shaft jack" for
8UD1 can be used. Please see chapter Accessories for 8UD1 (Page 111).
Closing the cabinet door
①
Coupling head slightly deflected downwards - cabinet door can be closed
②
Coupling head widely deflected downwards - cabinet door cannot be closed
③
Coupling head widely deflected downwards, 8UD1 handle with shaft jack - cabinet door can be
closed
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 101
8.4.4
Functions and operation
Door interlock
The door interlock of the door-coupling rotary operating mechanism locks the door as soon
as the door-coupling rotary operating mechanism is turned to position ON (I).
NOTICE
Damage to property.
Risk of damaging the device.
If the door is pulled with a force of 800 N or more while the door interlock is activated, the
operating mechanism can be destroyed.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
102 Manual, 10.2018, L1V30490761A-02
Overriding the door interlock
The door interlock can be overridden by a deliberate action. This means that the door can be
opened with the operating mechanism in position ON (I) so that maintenance can be carried
out, for example.
Procedure
1. Press the door interlocking pin with a sharp object.
2. Hold the pin down while the door is opened.
NOTICE
Damage to property.
Risk of damaging the device.
If door interlock is overridden, take care that the 8UD1 handle and the 3KD switch are in
the same position (both ON or both OFF) before closing the cabinet door to prevent
damage to the mechanism.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 103
Disabling door interlock
Door interlock can also be deactivated permanently.
To deactivate the door interlock, a lever on the back of the 8UD1 front cover has to be turned
to vertical position (with slotted screwdriver 2.5 mm)
①
Door interlock activated
②
Door interlock deactivated
Note
The lever for deactivation of the door interlock is only accessible when the handle is not
assembled to the cabinet door. If you want to deactivate door interlocking, take care to rotate
the
lever before installation of the handle.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
104 Manual, 10.2018, L1V30490761A-02
Overview door interlock
NOTICE
Damage to property.
Risk of damaging the device.
If the door interlock is deactivated, take care that the 8UD1 handle and the 3KD switch are
in the same position (both ON or both OFF) before closing the cabinet door to prevent
damage to the mechanism.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 105
Tolerance compensation
Door-coupling rotary operating mechanisms are supplied as standard with a tolerance
compensator. This device compensates any potential minor offset between the rotary switch
of the cabinet doors and the shaft of the door-coupling rotary operating mechanism.
①Tolerance compensator
Note
The coupling drivers are also available without tolerance compensation (accessory).
These are used for 3KD with side operation.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
106 Manual, 10.2018, L1V30490761A-02
Padlocking
8UD1 handles in as-delivered condition can be locked with padlocks in OFF position. When
the handle is locked in OFF position, the 3KD switch disconnector cannot be closed, nor can
the cabinet door be opened. The door interlock cannot be overridden.
Up to three padlocks with a shackle diameter of between 4.5 and 9.5 mm can be used to
lock the rotary operating mechanisms. Padlocks are not included in scope of supply.
Enabling padlocking in ON position
8UD1 handles can be modified in a way to allow padlocking in OFF and ON position.
Note
•
This modification is not reversible.
•
Enabling of padlocking in ON position is only possible as long the handle is not
assembled to the cabinet door. If you want to enable padlocking in the ON position,
please take care to do it before installation of the handle.
Disassemble the operator from the front cover.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 107
Remove the knockout contour
Frame size
1, 2
1.0 ... 1.2 Nm
3, 4, 5
2.0 ... 2.5 Nm
Re-assemble the operator to the front cover.
Test padlocking in ON position before installation to the cabinet door.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
108 Manual, 10.2018, L1V30490761A-02
Up to three padlocks with a shackle diameter of between 4.5 and 9.5 mm can be used to
lock the rotary operating mechanisms.
Note
3KD can also be used as an EMERGENCY
-STOP switch (with red / yellow handle) – if 3KD
is used as an EMERGENCY
-STOP switch, padlocking in the ON position is not allowed.
Test function for auxiliary switches
3KD offers a test function for assembled auxiliary switches which is supported by the 8UD1
door-coupling rotary operating mechanism.
Note
For details about test function please see chapter
Auxiliary switches (Page 63).
Switching to test position
Test position is located 20° counterclockwise from the OFF position and is mechanically
blocked to prevent accidental switching to test during normal switching from ON to OFF.
Procedure:
1. Press the Test position – Pin with a sharp object (up to 2 mm diameter).
2. Hold the Pin down while the handle is turned to test position.
Note
The pin can also be used for overriding door locking in the ON position of the handle.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 109
Assignment of switching position between 8UD1 handle and 3KD
To ensure the usual position of the 8UD1 handle ("OFF" on left, "ON" on top) the coupling
drivers, shafts and the drive module of 3KD are equipped with a tongue-and-groove joint.
If the 3KD is assembled, e.g. turned by 90°, the location of OFF of the 8UD1 handle would
be in top position – to move it to the left position, the tongue-and-groove joint can be
modified at the coupling drivers and the shaft coupling in steps of 90°.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
110 Manual, 10.2018, L1V30490761A-02
Modification of tongue-and-groove joint at coupling driver
Remove with tool such as screwdriver (push from inside)
Reinsert from outside at any position desired
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 111
8.4.5
Accessories for 8UD1
Shaft coupling
The shaft coupling is used when the length of the shafts of 300 / 600 mm is not long enough
and has to be extended.
For 3KD sizes 1 to 4
Frame size
A [ mm ]
1, 2, 3
8 mm
2.6 ... 3.0 Nm
28
4, 5
8 mm
5.4 ... 6.0 Nm
40
For 3KD size 5
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
112 Manual, 10.2018, L1V30490761A-02
Shaft jack for 3KD size 1 and 2
The shaft jack can be used if the coupling head is too widely deflected and the cabinet door
cannot be closed due to a mechanical collision between the coupling head and the 8UD1
handle.
This accessory part is necessary if a 3KD is assembled onto a DIN rail and shafts longer
than 300 mm are used.
Frame size
1, 2 PZ2 1.0 Nm
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 113
Labeling plate
The labeling plate with the order number 3VA9087-0SX10 can be used for inscription directly
on the front cover of the 8UD1 handle. Size of the inscription area is 44.5 x 14.5 mm.
Assembly
Remove the knockout contours on the back of the 8UD1 front cover.
Snap the labeling plate onto the 8UD1 front cover.
Further accessories
8.4 8UD1 door-coupling rotary operating mechanism
3KD switch disconnector
114 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 115
Maintenance
9
9.1
Maintenance
No maintenance procedures are necessary.
Maintenance
9.1 Maintenance
3KD switch disconnector
116 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 117
Technical data
10
10.1
3-pole and 4-pole versions of 3KD switch disconnectors
1)
Configuring note: Max. permissible operating temperature at connections 125°C
2)
Relevant only for devices with flat terminals
3)
Under certain circumstances usage of phase barriers is mandatory – please see chapter Phase barriers
4)
For more detailed information please see chapter Main circuit connection
5)
95 mm² valid for variants with flat terminals
6)
When using busbars that are 20 mm wide, these must be insulated
Technical data
10.1 3-pole and 4-pole versions of 3KD switch disconnectors
3KD switch disconnector
118 Manual, 10.2018, L1V30490761A-02
1)
Under certain circumstances usage of phase barriers is mandatory – please see chapter Phase barriers
Technical data
10.1 3-pole and 4-pole versions of 3KD switch disconnectors
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 119
1)
Under certain circumstances usage of phase barriers is mandatory – please see chapter Phase barriers
2)
The values are provided as a guide only and may vary depending on the make of motor
3)
Valid for the combination of 3KD and fuse type 3NA38 for Iu = 16 … 160 A; 3NA31 for Iu = 200 A, characteristic gG
Technical data
10.1 3-pole and 4-pole versions of 3KD switch disconnectors
3KD switch disconnector
120 Manual, 10.2018, L1V30490761A-02
1)
Configuring note: Max. permissible operating temperature at connections 125°C
2)
Under certain circumstances usage of phase barriers is mandatory – please see chapter Phase barriers
3)
For more detailed information see chapter Main circuit connection
Technical data
10.1 3-pole and 4-pole versions of 3KD switch disconnectors
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 121
1)
Under certain circumstances usage of phase barriers is mandatory – please see chapter Phase barriers
Technical data
10.1 3-pole and 4-pole versions of 3KD switch disconnectors
3KD switch disconnector
122 Manual, 10.2018, L1V30490761A-02
1)
Under certain circumstances usage of phase barriers is mandatory - please see chapter Phase barriers
2)
The values are provided as a guide only and may vary depending on the make of motor
3)
Valid for the combination of 3KD and fuse type 3NA38 for Iu = 16 ... 160 A …; 3NA31 for Iu = 200 A, characteristic gG
Technical data
10.2 6 pole versions of 3KD switch disconnectors for DC 1200 V
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 123
10.2
6 pole versions of 3KD switch disconnectors for DC 1200 V
1)
Configuring note: Max. permissible operating temperature at connections 110 °C
2)
Valid for versions with box terminals, versions with flat terminals max. 1200 V
3)
Valid for versions with box terminals, versions with flat terminals max. 1250 V
4)
Relevant only for devices with flat terminals
5)
For more detailed information see chapter Main circuit connection
6)
When using busbars that are 20 mm wide, these must be insulated
Technical data
10.2 6 pole versions of 3KD switch disconnectors for DC 1200 V
3KD switch disconnector
124 Manual, 10.2018, L1V30490761A-02
Technical data
10.2 6 pole versions of 3KD switch disconnectors for DC 1200 V
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 125
1)
Configuring note: Max. permissible operating temperature at connections 110 °C
2)
For more detailed information see chapter Main circuit connection
Technical data
10.2 6 pole versions of 3KD switch disconnectors for DC 1200 V
3KD switch disconnector
126 Manual, 10.2018, L1V30490761A-02
1) For switch disconnectors size 3 and 4, phase barriers or cable connection covers (accessories) are required when
connecting cable lugs
Technical data
10.3 Technical data of accessories for 3KD
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 127
10.3
Technical data of accessories for 3KD
10.3.1
Additional poles
Additional poles - 4th contact element, neutral terminal and N/PE terminal, have the same
technical data as the corresponding main switch 3KD, please see chapter Technical data of
3-pole and 4-pole versions of 3KD switch disconnectors (Page 117).
10.3.2
Auxiliary switches
Frame size 1 and 2
Type Auxiliary switch 1 CO
Version
Standard
Solid state compatible
Operating current
At AC-12 / AC230 V
A
5
-
At AC-13 / AC230 V
A
-
0.1
At AC-15 / AC230 V
A
2
-
At AC-13 / AC230 V
0.2
-
Electrical connection With soldered-on cable (finely stranded) 0.75 mm² (18 AWG), 50 cm long or with
blade terminals for conductor cross-section 0.5 - 1.5 mm² (22 - 16 AWG).
Frame size 3, 4 and 5
Standards
IEC 60947-5-1, IEC 60947-5-5
General technical details
Continuous free-air thermal current I
th
A
10
Rated insulation voltage Ui
V
500
At degree of pollution acc. to IEC 60947-1
Class 3
Rated impulse withstand voltage Ui
kV
6
Switching frequency
1/h
3600
Contact reliability
1 maloperation per 10 million
Test voltage
V
5
Test current
mA
1
Degree of protection acc. to IEC 60529
Terminals
IP20
Contact room
IP40
Ambient conditions
Ambient temperature
During operation
°C
-25 ... + 70
Technical data
10.3 Technical data of accessories for 3KD
3KD switch disconnector
128 Manual, 10.2018, L1V30490761A-02
During storage °C -25 ... + 80
Degree of pollution
3
Lifetime
Mechanical
10 million
Electrical
10 million
Conductor connections
Finely stranded, with end sleeves acc. to
DIN 46228
mm² 2 x (0.5 … 1.5)
Finely stranded, without end sleeves
mm²
2 x (1.0 … 1.5)
Solid
mm²
2 x (1 … 1.5)
Solid, with end sleeves acc. to DIN 46228
mm²
2 x (0.5 … 0.75)
AWG cables
2 x AWG 18 … 14
Tightening torque
Nm
0.8 … 0.9
Operating behavior
Rated operational current I
e
At AC-12
Up to 110 V
A
10
At 230 V, 400 V
A
8
At AC-15
Up to 230 V
A
6
At 400 V
A
3
At 500 V
A
1.4
At DC-12
At 24 V
A
10
At 48 V
A
5
At 110 V
A
2.5
At 230 V
A
1
At 400 V, 500 V
A
0.3
At DC-13
At 24 V
A
3
At 48 V
A
1.5
At 110 V
A
0.7
At 230 V
A
0.3
At 400 V, 500 V
A
0.1
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 129
Dimension drawings and hole drilling templates
11
11.1
Distance to grounded parts and between two 3KD
Frame size
Terminal
A [mm]
B [mm]
C [mm]
D [mm]
1
Box terminal
0
10
10
0
2
Box terminal
0
10
10
0
Flat terminal
0
30
30
0
3
Flat terminal
20
40
40
20
4
Flat terminal
30
50
50
30
5
Flat terminal
30
50
50
30
WARNING
Fire hazard.
Some combinations of mounting position and load may cause flashovers between the
terminals if no phase barriers or cable connection covers are used.
Use phase barriers or cable connection covers if applicable according to chapter Phase
barriers (Page 50)
Note
Dimensions A and D can be reduced to 0 mm if phase barriers or cable connection covers
are assembled to the 3KD.
Dimension drawings and hole drilling templates
11.1 Distance to grounded parts and between two 3KD
3KD switch disconnector
130 Manual, 10.2018, L1V30490761A-02
Frame size
Terminal
A [mm]
B [mm]
1
Box terminal
0
-
2
Box terminal
0
-
Flat terminal
0
8
3, 4, 5
Flat terminal
0
14
Dimension drawings and hole drilling templates
11.2 Drilling templates
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 131
11.2
Drilling templates
This chapter describes the drilling templates for floor mounting and door-coupling rotary
operating mechanisms.
Note
Scale
The drilling templates in this chapter are not in scale 1:1.
Drilling template for 3KD floor mounting
Frame
size
Poles Terminal A [mm] B [mm] C [mm] D [mm] E [mm] F [mm]
1
3
Box terminal
94
109
119.6
46.5
119
M4
4
Box terminal
112
127
137.6
46.5
119
M4
6
Box terminal
148
163
173.6
46.5
119
M4
2
3
Box terminal
121
136
146.6
46.5
126
M4
Flat terminal
121
136
146.6
46.5
130
1)
M4
4
Box terminal
148
163
173.6
46.5
126
M4
Flat terminal
148
163
173.6
46.5
130
1)
M4
6
Box terminal
202
217
227.6
46.5
126
M4
Flat terminal
202
217
227.6
46.5
130
M4
1) Without phase barriers
Frame sizes 1 and 2
Dimension drawings and hole drilling templates
11.2 Drilling templates
3KD switch disconnector
132 Manual, 10.2018, L1V30490761A-02
Frame
size
Poles A [mm] B [mm] C [mm] D [mm] E [mm] F 1) [mm] G [mm] H [mm] J [mm] K [mm]
3
3
167
190
200
208
65
100
110
118
M4
-
4
211
234
244
252
65
100
110
118
M4
-
6 299 323 332 340 65 100 110 118 M4 35
4
3
228
260
279
291
93
145
161
173
M6
-
4 288 320 339 351 93 145 161 173 M6 -
6
408
440
459
471
93
145
161
173
M6
48
1) Dimension of the body of the switch (without phase barriers and terminal bars)
Frame sizes 3 and 4
Frame size
Poles
A [mm]
B [mm]
C [mm]
D [mm]
5
3
340
382
-
M8
4
430
472
-
M8
6
610
652
70
M8
① Dimension of the body of the switch (without phase barriers and terminal bars)
Frame sizes 5
Dimension drawings and hole drilling templates
11.2 Drilling templates
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 133
Drilling templates for 8UD1 door-coupling rotary operating mechanisms
(For assembly of the handle in the cabinet door or side wall)
Frame size
A [ mm ]
B [ mm ]
C [ mm ]
D [ mm ]
1, 2
65
10.5
Ø 30
Ø 4.5
3, 4, 5
88
13.5
Ø 65
Ø 5.5
Note
Illuminated 8UD1
The hole diameter of 3 mm is only necessary if an illuminated version of 8UD1 is used.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
134 Manual, 10.2018, L1V30490761A-02
11.3
Dimensional drawings
Basic units
The following dimensions are measured in units of mm.
3KD, frame size 1 and 2, front operation with box terminal
①
Mounting depth of shaft of door-coupling rotary operating mechanism is: Min.15, Max. 20
②
Possible configuration
Version
A [mm]
B [mm]
C [mm]
D [mm]
E [mm]
F [mm]
G [mm]
Frame size 1, 3-pole
94
109
119.6
18
119
18.4
9.6
Frame size 1, 4-pole
112
127
137.6
18
119
18.4
9.6
Frame size 1, 6-pole DC
148
163
173.6
18
119
18.4
9.6
Frame size 2, 3-pole
121
136
146.6
27
126
15.8
13.4
Frame size 2, 4-pole
148
163
173.6
27
126
15.8
13.4
Frame size 2, 6-pole DC
202
217
227.6
27
126
15.8
13.4
Note
Additional dimensions for complete units with direct handle, please see accessories of direct
handle.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 135
3KD, Frame size 1 and 2, side operation with box terminal
①
Mounting depth of shaft of door-coupling rotary operating mechanism: Min. 15, Max. 20
Version
A [mm]
B [mm]
C [mm]
D [mm]
Frame size 1, 3-pole
103.3
114.3
118.3
128.9
Frame size 1, 4-pole
121.3
132.3
136.3
146.9
Frame size 2, 3-pole
130.3
141.3
145.3
155.9
Frame size 2, 4-pole
157.3
168.3
172.3
182.9
Possible configurations
①
Assembly position of auxiliary switch
②
Operation from left side
③
Operation from right side
Note
•
For additional dimensions see drawing for front operated version.
•
The axis of rotation on the front side is only for indication of switch position – an 8UD1
handle can only be assembled at the side.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
136 Manual, 10.2018, L1V30490761A-02
3KD, Frame size 2, with flat terminal
①
Mounting depth of shaft of door-coupling rotary operating mechanism is: Min.15, Max. 20
Version
A [mm]
B [mm]
C [mm]
X [mm]
3-pole
121
136
146.6
2.5
4-pole
148
163
173.6
2.5
6-pole DC
202
217
227.6
2.5
Possible configurations
Note
Additional dimensions for complete units with direct handle, please see accessories of direct
handle.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 137
3KD, frame size 2, side operation with flat terminal
①
Mounting depth of shaft of door-coupling rotary operating mechanism: Min.15, Max. 20
Version
A [mm]
B [mm]
C [mm]
D [mm]
3-pole 130.3 141.3 145.3 155.9
4-pole
157.3
168.3
172.3
182.9
Possible configurations
①
Assembly position of auxiliary switch
②
Operation from left side
③
Operation from right side
Note
•
Additional dimensions see drawing for front operated version.
•
The axis of rotation on the front side is only for indication of switch position – an 8UD1
handle can only be assembled at the side.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
138 Manual, 10.2018, L1V30490761A-02
3KD, frame size 3 and 4, with flat terminal
①
Auxiliary switch
②
Possible configuration
③
Mounting depth of shaft of door-coupling rotary operating mechanism for size 3 is: Min. 38, Max.
48; for size 4 is: Min. 50, Max. 60
Aux switch type
3KD frame size
X [mm]
Y [mm]
Z [mm]
3SU1400-1AA10-1BA0
3
128
38.2
33.2
4
173
51.3
33.2
3SU1400-1AA10-1DA0
3
150
37.7
34.1
4
196
50.8
34.1
3SU1400-1AA10-1CA0
3
128
38.2
33.2
4
173
51.3
33.2
3SU1400-1AA10-1EA0
3
150
37.7
34.1
4
196
50.8
34.1
3SU1400-1AA10-1FA0
3
150
37.7
34.1
4
196
50.8
34.1
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 139
Version
Frame size 3,
3-pole
Frame size 3,
4-pole
Frame size 3,
6-pole DC
Frame size 4,
3-pole
Frame size 4,
4-pole
Frame size 4,
6-pole DC
A [ mm ]
167
211
299
228
288
408
B [ mm ] 190 234 323 260 320 440
C [ mm ]
200
244
332
279
339
459
D [ mm ]
208
252
340
291
351
467
E [ mm ]
65
65
65
93
93
93
F [ mm ]
100
100
100
145
145
145
G [ mm ]
110
110
110
161
161
161
H [ mm ]
131
131
131
187
187
187
J [ mm ]
164
164
164
235
235
235
K [ mm ]
Ø11
Ø11
Ø11
Ø14
Ø14
Ø14
L [ mm ]
30
30
30
40
40
40
M [ mm ]
44
44
44
60
60
60
N [ mm ]
22
22
22
30
30
30
O [ mm ]
7
7
7
10
10
10
P [ mm ]
M4
M4
M4
M6
M6
M6
Q [ mm ]
47
47
47
67.5
67.5
67.5
R [ mm ]
40
40
40
46.5
46.5
46.5
S [ mm ]
4
4
4
8
8
8
T [ mm ]
6
6
6
8
8
8
U [ mm ]
85.5
85.5
85.5
101.5
101.5
101.5
V [ mm ]
93.5
93.5
93.5
110
110
110
Note
For additional dimensions for complete units with direct handle, please see accessories of
direct handle.
For additional dimensions for 3KD with side operation (position of shaft), please see
access
ories of door-coupling rotary operating mechanisms.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
140 Manual, 10.2018, L1V30490761A-02
3KD, frame size 3 and 4, side operation from right side
①
Assembly place for auxiliary switches
②
Mounting depth of shaft of door-coupling rotary operating mechanism for size 3 is: Min. 21, Max.
31; for size 4 is: Min. 35, Max. 45
Version
A [mm]
B [mm]
C [mm]
Frame size 3
25
39.5
8.5
Frame size 4
38.5
43
11
Note
•
For additional dimensions please see drawing for front operated version.
•
The axis of rotation on the front side (dimensions E and F) is only for indication of switch
position – an 8UD1 handle can only be assembled at the side.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 141
3KD, frame size 3 and 4, side operation from left side
①
Assembly place for auxiliary switches
②
Mounting depth of shaft of door-coupling rotary operating mechanism for size 3 is: Min. 21,
Max. 31; for size 4 is: Min. 35, Max. 45
Version
A [mm]
B [mm]
C [mm]
Frame size 3
25
39.5
8.5
Frame size 4
38.5
43
11
Note
•
For additional dimensions see drawing for front operated version.
•
The axis of rotation on the front side (dimensions E and F) is only for indication of switch
position – an 8UD1 handle can only be assembled at the side.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
142 Manual, 10.2018, L1V30490761A-02
3KD, frame size 5, with flat terminal
①
Auxiliary switch
②
Mounting depth of shaft of door-coupling rotary operating mechanism is: Min. 78, Max. 88
Version
D [mm]
E [mm]
F [mm]
G [mm]
3-pole
340
360
366
382
4-pole
430
450
456
472
6-pole DC
610
-
-
652
Aux switch type
A [mm]
B [mm]
C [mm]
3SU1400-1AA10-1BA0
208
33.2
83.4
3SU1400-1AA10-1DA0
230
34.1
82.9
3SU1400-1AA10-1CA0 208 33.2 83.4
3SU1400-1AA10-1EA0
230
33.2
83.4
3SU1400-1AA10-1FA0 230 33.2 83.4
Note
•
For additional dimensions for complete units with direct handle, please see accessory of
direct handle
•
For additional dimensions for 3KD with side operation (position of shaft), please see
accessories of door-coupling rotary operating mechanisms.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 143
3KD, frame size 5, side operation from right side
①
Assembly place for auxiliary switches
②
Mounting depth of shaft of door-coupling rotary operating mechanism is: Min. 54, Max. 64
Note
•
Additional dimensions see drawing for front operated version.
•
The axis of rotation on the front side (dimensions E and F) is only for indication of switch
position – an 8UD1 handle can only be assembled at the side.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
144 Manual, 10.2018, L1V30490761A-02
3KD, frame size 5, side operation from left side
①
Assembly place for auxiliary switches
②
Mounting depth of shaft of door-coupling rotary operating mechanism is: Min. 54, Max. 64
Note
•
For additional dimensions see drawing for front operated version.
•
The axis of rotation on the front side (dimensions E and F) is only for indication of switch
position – an 8UD1 handle can only be assembled at the side.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 145
Accessory: 4th pole, N terminal, N/PE terminal
①
3KD, frame size 1 and 2, with box terminal
②
3KD, frame size 1 and 2, with flat terminal
③
Optional assembly position
Frame size
A [ mm ]
Box terminal
1
18
2
27
Flat terminal
2
27
3
44
4
60
5
90
Note
Assembly of 4th pole is only possi
ble on 3-pole 3KD, for additional dimensions (side view
and terminal)
- please see basic units.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
146 Manual, 10.2018, L1V30490761A-02
Accessory: auxiliary switch module
Auxiliary switch module for frame size 1 and 2
Note
Auxiliary switch modules with test functi
onality can only be assembled directly next to the
drive module of the 3KD.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 147
Accessory: Phase barriers
Phase barriers for frame size 2
Phase barriers for frame size 3 and 4
Frame size
A [mm]
B [mm]
C [mm]
D [mm]
3
313
253
106.5
68
4
389
317
122
75
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
148 Manual, 10.2018, L1V30490761A-02
Phase barriers for frame size 5
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 149
Accessory: cable connection cover
Cable connection covers for frame sizes 2 to 5
Frame size
Version
A [mm]
B [mm]
C [mm]
2
Standard
240
78
52
Short
194
55
52
3
Standard
317
108.5
81
Short
218
59
81
4
Standard
401
128
93.5
Short
280
67.5
93.5
5
Standard
450
135
117.5
Note
The cable connection covers can also be assembled to the drive module of the 3KD (to
cover assembled auxiliary switches).
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
150 Manual, 10.2018, L1V30490761A-02
Accessory: direct handle
Direct handle for frame size 1 and 2, standard version
Frame
size
A [mm] B [mm] C [mm] D [mm] E [mm] F [mm] G [mm]
1
104
87
60
45
42
∅ 6.2
79
2
118
97
73
58
55
∅ 6.2
89
Note
Can be locked with up to 3 padlocks, needs additional depth in locked position, for
dimension for axis of rotation
- please see basic unit.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 151
Direct handle for frame size 1 and 2, flat version
①
Padlocked position
Frame size A [mm] B [mm] C [mm] D [mm] E [mm]
1
78
57
42
∅ 6.2
70
2 97 73 55 ∅ 6.2 89
Note
Can be locked with one padlock, needs no additional depth in locked position, for dimension
for axis of rotation
- please see basic unit.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
152 Manual, 10.2018, L1V30490761A-02
Direct handle for frame size 3
Note
Can be locked with up to 3 padlocks, needs additional depth in locked
position, for
dimension for axis of rotation
- please see basic unit.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 153
Direct handle for frame size 4 and 5
Frame size
A [mm]
B [mm]
C [mm]
D [mm]
E [mm]
F [mm]
4
185
171.5
140
∅ 8.2
166.5
55
5
231
247
200
∅ 8.5
212.5
84
Note
Can be locked with up to 3 padlocks, needs additional depth in locked position, for
dimension for axi
s of rotation - please see basic unit.
Dimension drawings and hole drilling templates
11.3 Dimensional drawings
3KD switch disconnector
154 Manual, 10.2018, L1V30490761A-02
Accessory: 8UD1 door-coupling rotary operating mechanism
①
Handle of 8UD1 door-coupling rotary operating mechanism for frame size 1
②
Handle of 8UD1 door-coupling rotary operating mechanism for frame size 2
③
Handle of 8UD1 door-coupling rotary operating mechanism for frame size 3 to 5
Frame size A [mm] B [mm]
3
106
13
4
140
13
5
200
15
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 155
Appendix
A
A.1
Standards and approvals
Standards
Series 3KD switch disconnectors confirm to the following international standards.
IEC 60947-3
DIN EN 60947-3
Switches, disconnectors, switch-disconnectors and fuse-combination units
IEC 60947-1
DIN EN 60947-1
Low-voltage switchgear and controlgear – Part 1: General rules
GB14048.3
(CCC)
Switches, Load breakers, disconnectors
IEC 60947-1
Annex Q
Special tests - Damp heat, salt mist, vibration and shock
category=E
IEC 60947-5-1
GB14048.5
DIN EN 60947-5
Auxiliary contacts
DIN 43880
Built in equipment for electrical installations
DIN EN 60715 Dimensions of low-voltage switchgear and controlgear
Standardized mounting on rails for mechanical support of electrical devices
in switchgear and controlgear installations
DIN 46234 Terminal ends for solderless connections, ring type, without insulating
sleeve, for copper conductors
DIN 46235
Press-sockets for solderless connections for copper conductors
DIN 46206-2 Supply-terminals for electrical equipment 40 A; connections with rectangular
cross-section, basic dimensions and coordination
Directives
EC directives:
● Low-voltage directive
● EMC directive
● Machinery directive
Certifications
Appendix
A.1 Standards and approvals
3KD switch disconnector
156 Manual, 10.2018, L1V30490761A-02
Environmental compatibility
All materials used are environmentally compatible, taking account of "Hazardous substances,
list of prohibited substances, list of substances to be avoided" (SN 36350).
Please go to following link for further technical support
(https://support.industry.siemens.com/cs/ww/en/ps/19666).
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 157
List of abbreviations
B
B.1
Table of abbreviations
Summary
Table B- 1 Meaning of abbreviations used in this document
Abbreviation
Meaning
AC
AC voltage
ATSE
Automatic Transfer Switching Equipment
AUX Auxiliary switch
C
Common
DC Direct voltage
DIN
Deutsches Institut für Normierung e. V. (German Institute for Standardization)
ESD
Electrostatic sensitive devices
EMC
Electromagnetic compatibility
EN
European Standard
IEC
International Electrotechnical Commission
IP
International Protection
LBS
Load Break Switch (switch disconnector)
N
Neutral conductor
NC
Normally closed contact
NEMA
National Electrical Manufacturers Association
NFPA
National Fire Protection Association
NO
Normally open contact
LV
Low voltage
LV fuse
Low-voltage fuse
R
RESET
RMS
Root Mean Square
T Test
UL
Underwriters Laboratories Inc.
VDE Verein Deutscher Ingenieure (Association of German Electrical Engineers)
VDI
Verein Deutscher Ingenieure (Association of German Engineers)
List of abbreviations
B.1 Table of abbreviations
3KD switch disconnector
158 Manual, 10.2018, L1V30490761A-02
Table B- 2 Meaning of symbols and abbreviations
Symbol /
Abbreviation
Meaning
I
2
t
Let-through energy
Icm Making capacity; rated short-circuit making capacity
I
cn
Rated breaking capacity; rated short-circuit breaking capacity
Ics
Maximum short-circuit breaking capacity (partial selectivity); rated service short-circuit breaking capacity
I
cu
Maximum short-circuit breaking capacity (full selectivity); rated ultimate short-circuit breaking capacity
Icw
Rated short-time withstand current; rated short-time current
I
c
Let-through current
Ik
Short-circuit current
I
KD
Uninterrupted short-circuit current
IK MAX
Maximum short-circuit current
I
e
Rated operational current
IP
Rated peak withstand current, impulse short-circuit current
I
sc
Prospective current
Ith
Conventional free-air thermal current
I
U
Rated uninterrupted current
U
Voltage across main contacts
U
e
Maximum voltage; rated operating voltage
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 159
Conversion tables
C
The U.S. units can be converted to the corresponding European/metric units using the
conversion tables listed.
Note
No liability assumed for completeness or accuracy.
No liability can be assumed for th
e completeness or accuracy of the values listed in this
section of the manual.
Conversion of North American cross-section dimensions into metric cross-section dimensions
Metric cross-sections in accordance with VDE (Verband Deutscher Elektroingenieure
(Association of German Electrical Engineers)) (mm2) ↔ conductor cross-sections in
accordance with AWG (American wire Gauge) or kcmil (Thousand Circular Mils)
AWG ↔ mm
2
conversion table
AWG / kcmil
Diameter d / mm
mm2
Metric equivalent [mm2]
AWG
20 0.81 1) 0.52 0.75
18
1.02
1)
0.82
1
16 1.29 1) 1.3 1.5
14
1.63
1)
2.08
2.5
12
2.05
1)
3.31
4
10
2.59
1)
5.26
6
8
3.26
1)
8.4
10
6
4.12
1)
13.3
16
4
5.19
1)
21.2
25
2
6.54
1)
33.6
35
1
7.34
1)
42.4
50
1 / 0
8.25
1)
53.5
-
2 / 0
9.27
1)
67.4
70
3 / 0
10.4
1)
85.0
95
4 / 0
11.68
1)
107
120
1) Diameter over Solid Conductors and Cross
-Sectional Area for All Solid and Stranded Conductors.
Source: Standard UL 83
Conversion tables
3KD switch disconnector
160 Manual, 10.2018, L1V30490761A-02
Kcmil ↔ mm
2
conversion table
AWG / kcmil
Diameter d / mm
mm2
Kcmil
250
14.6
1)
126
300 16 1) 152
350
17.3
1)
177
400
18.49
1)
203
500
20.65
1)
253
600
22.68
1)
304
800
26.16
1)
405
1000
29.26
1)
507
1500
35.86
1)
760
2000
41.45
1)
1010
1)
Diameter over Round Concentric-Lay-Stranded Conductors for Classes B, C and D.
Source: Standard UL 83
Other conversions
Conversion factors for units of length
Length
Conversion factor
1 inch ('')
25.4 millimeters (mm)
1 centimeter
0.3937 inch ('')
Conversion factors for units of weight
Weight
Conversion factor
1 ounce (Oz.)
28.35 grams (g)
1 pound (Ib.)
0.454 kilograms (kg)
1 kilogram (kg)
2.205 pounds (Ib.)
Pound (Ib.)
Conversion tables
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 161
Conversion factors for units of temperature
Temperature
100 degrees Centigrade (°C)
212 degrees Fahrenheit (°C)
80 °C 176 °F
60 °C
140 °F
40 °C
104 °F
20 °C
68 °F
0 °C
32 °F
- 5 °C
23 °F
- 10 °C
14 °F
- 15 °C
5 °F
- 20 °C
- 4 °F
- 25 °C
- 13 °F
- 30 °C
- 22 °F
Conversion factors for tightening torques
Tightening torque
Conversion factor
1 Newton meter (Nm)
8.85 Ib
F
in, 8.85 Ib-in (inch-pound)
1.36 Newton meter (Nm)
1 Ib
F
ft, 1 Ib-ft (inch-pound)
0.113 Newton meter (Nm)
1 Ib
F
in, 1 Ib-in (inch-pound)
Conversion tables
3KD switch disconnector
162 Manual, 10.2018, L1V30490761A-02
3KD switch disconnector
Manual, 10.2018, L1V30490761A-02 163
Glossary
Breaking capacity
The breaking capacity is the rms value of the current at a specific cos φ (power factor) and a
specific voltage which can be safely interrupted by a switching device or fuse under
prescribed conditions. The rms value of the symmetrical component applies in the case of
alternating current.
I2t characteristic
The I2t characteristic is a curve which represents the minimum or maximum values of I2t in
relation to breaking times as a function of the prospective current under defined operating
conditions.
I2t value
The I2t value is the thermal value of a prospective or a limited short-circuit current (let-
through current).
Let-through current
The let-through current ID is the maximum instantaneous current value during the breaking
time of a switching device or fuse. Limited short-circuit currents occur if the switching device
reduces the amplitude of the short-circuit current due to, for example, resistance, switching
delay and peak arc voltage. The let-through current of a device such as a current-limiting
fuse or a current-limiting molded case circuit breaker determines the thermal load (I2t value)
imposed on equipment connected downstream of the device (current limiting).
Making capacity
The making capacity is the value of the prospective making current which the switching
device can safely conduct at the instant of closing under prescribed conditions for a specific
circuit.
For load break switches, the making capacity is expressed as the maximum possible
instantaneous value of the potential prospective current at the input terminals for the
specified voltage.
Rated breaking capacity
The rated breaking capacity is the maximum current that can be interrupted by a switching
device under certain conditions.
Glossary
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164 Manual, 10.2018, L1V30490761A-02
Rated frequency
Design frequency for a switching device and reference value for other characteristics of the
device.
Rated making capacity
The rated making capacity is the maximum current that a switching device can conduct at
the instant of closing in accordance with the utilization category at the relevant rated
operational voltage.
Rated operational current
The rated operational current In for molded case circuit breakers is equivalent to the rated
uninterrupted current IU and to the conventional free-air thermal current Ith.
Rated operational voltage
The rated operational voltage Ue of a switching device, e.g. a molded case circuit breaker, is
the voltage which serves as a reference to state other characteristics of the device. The
maximum rated operational voltage must never be higher than the rated insulation voltage.
With multi-phase circuits, the specified voltage is generally the phase-to-phase voltage.
Rated peak withstand current, impulse short-circuit current
Maximum rated operational voltage must never be higher than the rated insulation voltage.
The current path under the highest load. It characterizes the dynamic short-circuit strength of
a switching device.
Rated service short-circuit breaking capacity
The rated service short-circuit breaking capacity Ics is the short-circuit current determined by
the operational voltage that a load break switch is capable of interrupting repeatedly (test
sequence O - CO - CO, formerly P - 2). After a load break switch has interrupted a short
circuit, it can continue to carry the rated operational current despite increased self-heating.
Rated short-circuit breaking capacity
The rated short-circuit breaking capacity Icn of a molded case circuit breaker is the maximum
current that the circuit breaker can safely interrupt at a specific rated operational voltage and
rated frequency. It is specified as an rms value.
With AC molded case circuit breakers, the rated short-circuit breaking capacity must be
independent of the magnitude of the DC component. The rated short-circuit breaking
capacity also ensures that the molded case circuit breaker can interrupt every current up to
the rated short-circuit breaking capacity in the event of a line-frequency recovery voltage with
110% of the rated operational voltage.
This applies:
Glossary
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Manual, 10.2018, L1V30490761A-02 165
● To alternating current at every value of the power factor, but not lower than the value
defined in the relevant test specification.
● To direct current (unless otherwise specified by the manufacturer) with every time constant,
but not greater than the value defined in the relevant test specification.
The short-circuit breaking capacity does not apply in the event of a recovery voltage at line
frequency above 110% of the rated operational voltage.
Rated short-circuit making capacity
The rated short-circuit making capacity Icm of a molded case circuit breaker is the maximum
current that the circuit breaker can safely interrupt at a specific rated operational voltage and
rated frequency. Unlike other characteristic data, this is specified as a peak value. With AC
molded case circuit breakers, the rated short-circuit making capacity must be at least equal
to the rated short-circuit breaking capacity multiplied by a factor n. The rated short-circuit
making capacity is calculated to allow the molded case circuit breaker to conduct the current
during closing at a voltage of up to 110% inclusive of the rated operational voltage.
Rated short-time current
Permissible rms value of the AC component of the prospective short-circuit current which the
switching device is capable of conducting for a specific time period, e.g. from 0.05 s to 1 s
(thermal short-circuit strength).
Rated short-time withstand current
The rated short-time withstand current Icw is specified as an rms value of the short-circuit
current and characterizes the thermal strength of a circuit of a switchgear assembly under
brief load conditions. The rated short-time withstand current calculation normally refers to a
period of 1 s. The reference time must be specified if it deviates from the above. The rated
short-time withstand current is specified for the distribution and/or main busbars of a
switchgear assembly.
Rated ultimate short-circuit breaking capacity
The rated ultimate short-circuit breaking capacity Icu is the maximum short-circuit current that
a load break switch is capable of interrupting (test sequence O - CO, formerly P - 1). Limit
value of rated ultimate short-circuit breaking capacity Icu. The rated ultimate short-circuit
breaking capacity Icu is the maximum value of the short-circuit current which the protective
device is capable of disconnecting in accordance with regulations. Up to this value, the
protective device is also allowed to be used in a network.
Rated uninterrupted current
The rated uninterrupted current IU of a switching device, e.g. a molded case circuit breaker,
is a current that the device can conduct in uninterrupted operation (for weeks, months or
years). This current is specified by the manufacturer.
Glossary
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166 Manual, 10.2018, L1V30490761A-02
Rating
The rating is the power that a switching device is capable of switching at the associated
rated operational voltage in accordance with the utilization category, e.g. power contactor
utilization category AC-3:37 kW at 400 V.
Short circuit
Connection with a negligibly low impedance between two points of different potential in an
electric circuit. The short-circuit current is a multiple of the rated operating current. Short
circuits can cause thermal or mechanical damage to switching devices and other parts of an
electrical installation.
Short-circuit strength
This is the resistivity of a switching device in the closed state, along with its components (e.g.
trip units), or a complete switchboard to the electrodynamic and thermal stresses which arise
in the event of a short circuit.
The characteristic for the dynamic stress is the rated peak withstand current, which is the
maximum instantaneous value of the short-circuit current.
The characteristic for the thermal stress of the short-circuit current is the root-mean-square
value of the short-circuit current throughout its duration.
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Manual, 10.2018, L1V30490761A-02 167
Index
3
3 pole and 4 pole
Technical data, 118
4
4th contact element, 74
4th pole, N-Terminal, N-/PE-Terminal
Dimension, 145
6
6 pole
Technical data, 123, 124, 125, 126
8
8UD1
Component overview, 91
Dimension, 154
Disabling door interlock, 103
Door interlock, 101
Drilling template, 133
Enabling padlocking, 107
Overview door interlock, 104
Shaft coupling, 111
Shaft jack, 112
Test function, 108
A
Accessory
Order numbers, 29
Additional poles
N-/PE terminal, 21
Assembly
Phase barrier, 54
Assembly of 8UD1, 94
Assembly of additional pole, 81
Assembly of auxiliary switch
Auxiliary switch, 67
Assembly of direct operating mechanism
Frame size 1 and 2, 87
Frame size 3, 4 and 5, 89
Assembly position
Auxiliary switch, 68
Assignment of switching position, 109
Auxiliary switch
Assembly of auxiliary switch, 67
Assembly position, 68
Frame size 1 and 2, 24, 57
Frame size 3, 4 and 5, 24, 58
Test function, 65, 66, 68
Auxiliary switch module, 146
Auxiliary switches
Technical data, 128
Available poles, 74
Auxiliary switch module, 74
N-/PE-terminal, 74
N-terminal, 74
B
Box terminal
Technical data, 46
Bridging bar, 50
C
Cabinet door, 100
Drilling template, 93
Cable connection cover, 56
Dimension, 149
Cable connection covers, 26
Calculate length of shaft
Front operated 3KD, 95
Side operated 3KD, 96
Circuit diagram, 44
Component overview
8UD1, 91
Connection types, 18
Contact number
Frame size 1 and 2, 61
Frame size 3, 4 and 5, 61
Coupling driver, 97
D
Dimension, 135, 135, 136, 137, 139, 140, 141, 142, 14
3, 144
4th pole, N-Terminal, N-/PE-Terminal, 145
Index
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168 Manual, 10.2018, L1V30490761A-02
8UD1, 154
Auxiliary switch module, 146
Cable connection cover, 149
Direct handle, 150
Phase barrier, 147
DIN rail
Frame size 1 and 2, 40
Direct handle
Dimension, 150
Direct operating mechanism, 20, 22
Padlocking, 85
Versions, 84
Disabling door interlock
8UD1, 103
Disabling of test function, 69
Door interlock
8UD1, 101
Door-coupling operating mechanism, 23
Drilling template
8UD1, 133
Cabinet door, 93
Frame 1 and 2, 36
Frame size 1 and 2, 131
Frame size 3 and 4, 38, 132
Frame size 5, 39, 133
E
Enabling of test function, 69
Enabling padlocking
8UD1, 107
Enabling test function, 72
Frame size 1 and 2, 70
Frame size 3, 4 and 5, 72
Exploded view
Frame size 1 and 2, 27
Frame size 3, 4 and 5, 28
F
Flat terminal, 49
Technical data, 49
Floor mounting
Frame 1 and 2, 35
Frame size 3 and 4, 37
Frame size 5, 40
Mounting, 17
Frame 1 and 2
Drilling template, 36
Frame 1 and 2
Floor mounting, 35
Frame size 1 and 2
Assembly of direct operating mechanism, 87
Auxiliary switch, 24, 57
Contact number, 61
DIN rail, 40
Drilling template, 131
Enabling test function, 70
Exploded view, 27
Possible assembly position, 75
Release hooks, 42
Frame size 3 and 4
Drilling template, 38, 132
Floor mounting, 37
Frame size 3, 4 and 4
Assembly of direct operating mechanism, 89
Frame size 3, 4 and 5, 72, 77
Auxiliary switch, 24, 58
Contact number, 61
Exploded view, 28
Frame size 5
Drilling template, 39, 133
Floor mounting, 40
Front operated 3KD
Calculate length of shaft, 95
L
Label, 33
Labeling plate assembly, 113
M
Manual operation, 32
Mounting
Floor mounting, 17
Standard mounting, 17
Mounting position, 34
N
N terminal
Reassemble the jumper, 83
Remove the jumper, 82
N-/PE terminal
Additional poles, 21
Index
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O
Order numbers
Accessory, 29
Switches, 29
Overview door interlock
8UD1, 104
P
Padlocking
Direct operating mechanism, 85
Performance features, 13
Phase barrier, 25
Assembly, 54
Dimension, 147
Possible assembly position, 77
Frame size 1 and 2, 75
Frame size 3, 4 and 5, 77
R
Reassemble the jumper
N terminal, 83
Release hooks
Frame size 1 and 2, 42
Remove the jumper
N terminal, 82
S
Safety distance, 130
Shaft coupling
8UD1, 111
Shaft jack
8UD1, 112
Side operated 3KD
Calculated length of shaft, 96
Standard mounting
Mounting, 17
Switches
Order numbers, 29
Switching instant, 63, 68
T
Technical data, 49
3 pole and 4 pole, 118
6 pole, 123, 124, 125, 126
Auxiliary switches, 128
Box terminal, 46
Test function
8UD1, 108
Auxiliary switch, 65, 66, 68
Test position, 32
Tolerance compensation, 105
Tongue-and-groove, 110
V
Versions
Direct operating mechanism, 84
Index
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170 Manual, 10.2018, L1V30490761A-02
