1, circuit breaker with good quality, but low cost; 2,MCCB conform to IEC 60947-2,60947-6 3,rated current 630A or less. 1,Scope of ApplicationCEM1 series moulded case circuit breaker(hereafter called circuit breaker), is suitable for the circuit of AC50Hz/60Hz, rated current 630A, rated operating voltage 690V or less. The series circuit breaker, in the distribution network, can be used for ...