1
➜ Single function phase control relay - 17.5 mm
■ Control of 3-phase networks : phase sequence, total
phase failure
■ Multi-voltage from 3 x 208 to 3 x 480 V a
■ Controls its own supply voltage
■ True RMS measurement
■ LED status indication
MWS
Function Phase sequence and failure
Nominal voltage (V) 3 x 208 ➞3 x 480 V a
Output 1 single pole changeover relay
Part numbers 84 873 029
Supply
Supply voltage Un 3 x 208 ➞3 x 480 V a *
Operating range 183 ➞528 V a
Inputs and measuring circuit
Measurement ranges 183 ➞528 V a
General characteristics
Weight 80 g
Comments
* 3-phase mains with earth
Supply
Voltage supply tolerance -12 % / +10 %
a supply voltage frequency 50 / 60 Hz ± 10 %
Galvanic isolation of power supply/measurement No
Power consumption at Un 22 VA in 400 Va, 50 Hz
Immunity from micro power cuts 60 ms
Inputs and measuring circuit
Guaranteed phase failure detection threshold < 100 V a
Frequency of measured signal 50 ➞60 Hz ± 10 %
Timing
Delay on pick-up ≤650 ms
Alarm on delay time max. 130 ms
Output
Type of contacts No cadmium
Maximum breaking voltage 250 V a / c
Max. breaking current 8 A z
Min. breaking current 10 mA / 5 V c
Electrical life (number of operations) 1 x 105 MWS
Breaking capacity (resistive) 2000 VA a / 80 W
Mechanical life (operations) 10 x 106
Insulation
Nominal insulation voltage IEC/EN 60664-1 400 V
Insulation coordination (IEC/EN 60664-1) Overvoltage category III : degree of pollution 3
Rated impulse withstand voltage (IEC/EN 60664-1) 4 kV (1.2 / 50 µs)
Dielectric strength (IEC/EN 60664-1) 2 kV AC 50 Hz 1 min.
Insulation resistance (IEC/EN 60664-1) > 500 MΩ / 500 V c
General characteristics
Output relay status indication Yellow LED
Casing 17.5 mm
Mounting On 35 mm symmetrical DIN rail, IEC/EN 60715
Mounting position All positions
Material : enclosure plastic type VO to UL94 standard Incandescent wire test according to IEC/EN 60695-2-11
Protection (IEC/EN 60529) Terminal block : IP20
Casing : IP30
Phase control
Part numbers
General characteristics
2
Connecting capacity IEC/EN 60947-1 Rigid : 1 x 42 - 2 x 2.52 mm2
1 x 11 AWG - 2 x 14 AWG
Flexible with ferrules : 1 x 2.52 - 2 x 1.52 mm2
1 x 14 AWG - 2 x 16 AWG
Max. tightening torques IEC/EN 60947-1 0.6 ➞1 Nm / 5.3 ➞8.8 Lbf.In
Operating temperature IEC/EN 60068-2 -20 ➞+50 °C
Storage temperature IEC/EN 60068-2 -40 ➞+70 °C
Humidity IEC/EN 60068-2-30 2 x 24 hr cycle 95 % RH max. without condensation 55 °C
Vibrations according to IEC/EN60068-2-6 10 ➞150 Hz, A = 0.035 mm
Shocks IEC/EN 60068-2-6 5 g
Standards
Standards IECI/EN 50178, IEC/EN 61000-6-2, IEC/EN 61000-6-3
Certifications CE, UL, CSA, GL
Conformity with environmental directives RoHS, WEEE
■ Customisable colours and labels
Description Code
Removable sealable cover for 17.5 mm casing 84800000
MWS
mm
MWS
100 mA fast-blow fuse
Product adaptations
Accessories
Dimensions (mm)
17,5
90
5,5
67,5
45
60
44
23,2
2,6
Connections
L1
L2
L3
L1 L3L2
24
11 14
22 21
12
11
12
14
L1
L2
L3
R
F1
1
1
3
Overview
3-phase network control relays monitor the sequence of phases L1, L2, L3 and failure of one or more phases.
LEDs are used for signalling.
MWS Phase failure and sequence
Operating principle
MWS: Phase controller
The relay monitors its own supply voltage.
The relay controls :
- correct sequencing of the three phases,
- total failure of one of the three phases.
When the phase sequence and voltages are correct (> 183 Va), the output relay (s) are closed
and the yellow LED is lit.
In the event of a phase sequence or total phase failure fault (detected when one of the voltages
drops below 100 V), the relay opens instantly and its LED is extinguished.
When the unit is powered up with a measured fault, the relay stays open.
MWS : Relay R
Response time on appearance of a fault (Tr)
Principles
1
2
L3
L2
Tr Tr Tr Tr
100 %
0 %
100 %
0 %
100 %
0 %
L1
L2
L3
1
2
