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3 phase, phase control MWS, MWS2

  • Triggers alarm upon incorrect phase sequence/phase interruption
  • Wide range input voltage from 3x208-480 V ac
  • 17.5 mm cabinet with DIN rail
  • LED indication
  • Does not measure returned voltage

Product description

Control relay for 3-phase network that monitors the phase sequence for phases L1, L2 and L3 and checks whether one or more phases are lacking. As long as the phase sequence and voltages are correct (>183 V AC), the output relay(s) is closed and the yellow LED (LED indication) is on. If a phase sequence or phase interruption fault occurs, the relay drops out and the LED turns off. Does not measure returned voltage.


Articles Breaking capacity Output Supply voltage
5A AC/DC 2x Relay 3 x 208-440V AC
8A @ 250V AC, 8A @ 30V DC Relay 3 x 208-480V AC


Control relay

Phase Monitor Relay MWS2 3 x 208-440V ac


Approvals CSA, GL, RoHS, UL
Breaking capacity 5A AC/DC
Function Phase Sequence, Phase Failure
IP class connection IP20
IP class housing IP30
Mounting 35 mm DIN-Rail
Output 2x Relay
Storage temperature max 70 °C
Storage temperature min -40 °C
Supply voltage 3 x 208-440V AC
Temperature operational max 50 °C
Temperature operational min -20 °C
Time delay startup 0,5 s
Time delay when exceeding the limit value 0,1 s
Weight 80 g

Measurements and connections

Technical illustrations

  • F1: Fast-blow fuse 100 mA (recommendation)

    F1: Fast-blow fuse 100 mA (recommendation)

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