NS Moulded Case Circuit Breaker(MCCB) 1.Pole: 3P, 4P 2.Rated Insulation voltage: 750V ... NS MCCB (Merlin Gerin Model MCCB) NS series moulded case circuit breaker is one of new type breakers which this company adopts ... neutral poles (N poles) of four poles MCCB has for types: 8, Type A: No overload release on N pole, which ... , 500, 600, 630 Rated Insulation voltage: 750V NS Moulded Case Circuit Breaker