PKZMO Motor Protective Circuit Breaker is applicable for the circuit of AC 50/60Hz,rated insulation voltage 750V rated operating voltage up to 660V,rated operating current from 0.1A to 25A.It is used for protecting the motor agamist overload,short-circuit and phase-failure.It can be also used for starting and breaking the starter fo m-otor and for the circuit protection in the circuit of 25A.