NS Moulded Case Circuit Breaker(MCCB) 1.Pole: 3P, 4P 2. ... Merlin Gerin Model MCCB) NS series moulded case circuit breaker is one of new type breakers which this company adopts international advanced ... installation. 2, According to use of MCCB: Distribution circuit protection type, motor protection type; 3, According to ... , 500, 600, 630 Rated Insulation voltage: 750V NS Moulded Case Circuit Breaker