MPCB – Motor Protection Circuit Breaker

Overview

The term MPCB refers to Motor Protection Circuit Breaker. They are designed to withstand starting currents without interrupting the circuit. The motor protection circuit breaker (MPCB) protects the motor from faults using a thermal-magnetic circuit breaker. For electric motors, the selection of the MPCB depends upon the motor’s full load current and the maximum short circuit current possible. MPCBs are available for different voltage levels, generally around 230 V to 660 V. They are unique in that they can withstand starting currents without interrupting the circuit.