Phase sequence monitoring relays

3-Phase Delta Monitoring Relay, Sequence and Phase Loss, 2 SPDT Relay Outputs, IP20, DIN-rail mounting, Measuring Range 177 to 550Vac, ...

... reverse phase rotation. – overvoltages and under voltages. – the voltage differences between phases due to loss of neutral or asymmetry. (Over / under voltage protection usable in single-phase) It ...