Crouzet Phase, Voltage Monitoring Relay, 3 Phase, SPDT, 183 → 528V ac, DIN Rail

3 phase network control relays monitor: the correct sequence of phases L1, L2, L3, the total phase failure - Undervoltage and overvoltage from 2% to 20% of Under Voltage Relay and Asymmetry rate from 5% to 15% of Under Voltage Relay. LEDs are used for fault signalling, if a fault persists for longer than the threshold crossing delay configured by the operator, the output relay opens and the LED R is extinguished.

"Control of 3 phase networks: phase sequence, phase failure, imbalance (asymmetry), over and under voltage
Range includes mono-function product and multi function product
Multi-voltage from 3 x 208 to 3 x 480 V
True RMS measurement
LED status indication"