- Product replaced by the new MWS 84 873 029
|Function||Nominal voltage (V)||Output||Code|
|Phase sequence and failure||3 x 208 →3 x 480 V ∿||1 single pole changeover relay||84873020|
|Supply voltage Un||3 x 208 →3 x 480 V ∿ *|
|Operating range||183 →528 V ∿|
|Measurement ranges||183 →528 V ∿|
|* 3-phase mains with earth|
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 : Relay R MWS2 : Relays R1/R2
Response time on appearance of a fault (Tr)
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 V∿), 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.
100 mA fast-blow fuse