NS Moulded Case Circuit Breaker(MCCB) 1.Pole: 3P, 4P 2.Rated Insulation voltage: 750V ... ): 12.5~630 NS MCCB (Merlin Gerin Model MCCB) NS series moulded case circuit breaker is one of new type breakers which this company adopts ... , 315, 400, 500, 600, 630 Rated Insulation voltage: 750V NS Moulded Case Circuit Breaker