Schneider Electric RM17Tx00 Series multi-function 3 phase supply control relays. Monitoring the correct sequencing of phases L1, L2, and L3 and the total loss of one or more of each phase. In the event of a phase sequence or missing phase fault, the relay opens instantly. In the event of voltage fault, the relay opens at the end of the time delay set.

Clear hinged front cover
Front face potentiometer
LED output status
DIN rail

The relay monitors its own Un supply voltage:
The relay controls: the direct sequence of the three phases, the loss of at least one of the three phases (U measured < 0.7 x Un), asymmetry adjustable from 5 → 15 % of Un, over- and under-voltage drift in window mode adjustable from 2 → 20 % of Un.

NF EN 60255-6 and IEC 60255-6

UL, CSA, GL, C-Tick, GOST