1SVR550805R9300

ABB CM-MSE Thermistor Motor Protection Relay, Part Number 1SVR550805R9300, an industrial motor protection device designed to monitor winding temperatures through connected PTC thermistor sensors.

The ABB CM-MSE is part of ABB's thermistor motor protection relay range and is designed to help protect electrical motors against excessive temperature conditions. By monitoring the resistance of compatible PTC thermistors embedded in motor windings, the relay detects overheating conditions and changes its output state, allowing the connected control circuit to initiate protective action.

The relay operates on a rated control supply voltage of 24V AC at 50/60 Hz and features one normally open output contact with automatic reset functionality. Once the monitored temperature returns to the permissible operating range, the relay automatically returns to its normal operating condition.