The EUCR-30RBMQ is an electronic undercurrent (underload) protection relay from the EUCR series, originally developed by nVent (formerly Samwha EOCR, now part of Schneider Electric's motor protection portfolio). This device is specifically engineered to protect three-phase AC motors from damage caused by undercurrent conditions, which commonly occur during "no-load" operation in pumps, conveyors, and other machinery where load loss can lead to equipment damage or process inefficiency.