ABB 1SVR740885R4300 Safety Relay

ABB 1SVR740885R4300 is a CM-MPS.23P three-phase monitoring relay that provides two changeover contacts for safety interlock applications in three‑phase equipment. It operates from a 3x180–280 V AC measuring supply with neutral monitoring (N) to detect phase loss, phase unbalance, or neutral interruptions, and it is designed to be used in ABB’s CM-MPS family to implement safe shutdown logic in machinery. The unit carries the ordering code 1SVR740885R4300 and is commonly used to supervise motors, pumps, and conveyors where reliable phase presence and neutral continuity are required. Its timing function supports a delay up to 30 seconds, allowing transient faults to clear before triggering a safety action, while the two changeover contacts enable wiring configurations for safety circuits in automation environments. In addition to its core monitoring role, this relay is specified for use with 3x180–280 V AC systems and is part of ABB’s portfolio of industrial safety relays designed to simplify fault detection and response in electrical control panels.