Overview The term MPCB refers to Motor Protection Circuit Breaker. An MPCB is a circuit breaker designed specifically for protecting electric motors against overloads, short circuits, under voltage, and phase losses. 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. Functions of MPCB:- Motor protection circuit breakers, or MPCBs, are specialized electromechanical devices that can be used with motor circuits at both 60Hz and 50Hz. Several functions allow it to provide a safe electrical supply for motors: A protection system against electrical faults, such as short circuits, line-to-ground faul...
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