NS Moulded Case Circuit Breaker(MCCB) 1.Pole: 3P, 4P 2. ... .Rated Working current (A): 12.5~630 NS MCCB (Merlin Gerin Model MCCB) NS series moulded case circuit breaker is one of ... closing and opening with the other three poles. 10, Type C: With overload release on N pole, which closing and opening ... , 300, 315, 400, 500, 600, 630 Rated Insulation voltage: 750V NS Moulded Case Circuit Breaker