Introduction

Application

        NCM1 series moulded case circuit breaker(hereinafter referred to as circuit breaker) is suitable for distribution network of AC50Hz/60Hz, rated working voltage 690V (NCM1-63 is 500V) and below, rated current 1250A and below, used to distribute the electric energy and protect the circuitry and power unit against overload, under-voltage or short-circuit. Circuit breakers whose frame size is 400A below also can be used to protect the motor against overload, under-voltage of short-circuit. In addition, it can be used to switch the circuitry and start the motor infrequently.