The HWUA 3 phase network control relay monitors：- The correct sequence of phases L1, L2, L3,- Total phase failure,- Undervoltage and overvoltage from 2％ to 20％ of Under Voltage Relay,- Asymmetry rate from 5％ to 15％ of Under Voltage Relay,- Faults are signalled via LEDs, distinguishing the origin of the fault
If a fault persists for longer than the threshold crossing delay configured by the operator, both output relays open and LED R is extinguished
Control of 3 phase networks： phase sequence, phase failure, asymmetry, under and overvoltage with independent settings Multi function / Multi-voltage product True RMS measurement LED status indication
