Phase Failure And Sequence Relay 415VA phase failure relay may have one or more relay outputs, all of which are typically set up in a failsafe manner. When the supply circumstances fall within the permitted tolerances, these relays will activate and close the circuit. Specifications: Contact Capacity: AC250V 5A Rated Operation Voltage: Three Phase AC 415V Over Voltage Protection: AC415V 495V Under Voltage Protection: AC335V 415V Operation Time of Over Voltage: 2s 8s adjustable Operation