ALVD2 is a Phase failure relay with Under/Over Voltage monitoring and suitable for 3 phase networks. Under/over voltage trip settings are site selectable, and relay has 4 user-friendly indications for power on, phase failure trip, under voltage trip, and over voltage trip. Auto reset and with one or two changeover contacts, the relay can be suitable for 415 V AC, 380 V AC, 440 V AC, or any other 3 phase supply system.