Phase and voltage monitoring relay for three-phase lines
The ABB 1SVR730885R3300 is a CM-MPS.21S phase and voltage loss relay, part of the General Purpose Relays category under Circuit Breakers, Fuses & Protection. It monitors three-phase mains for phase loss, phase sequence, and undervoltage conditions, tripping the output relay when a fault is detected to protect downstream motor loads or control circuits.