CJMM1 Series Moulded Case Circuit Breakers (MCCB)

Application

CJMM1 series moulded case circuit breaker(hereinafter referred to as circuit breaker) is pplicable for AC 50/60HZ power distribution network circuit with rated insulation voltage of 800V, rated operation voltage of 690V and rated operation current from 10A to 630A, it’s used to distribute power and prevent circuit and power supply equipment from damage due to overload, short circuit, under voltage and other faults, it’s also used for infrequent start of motor as well as overload, short circuit and under volt-age protection

This circuit breaker owns advantages of small volume, high breaking capacity, short arcing (or noarcing)etc, it can be equipped with access-ories like alarm contact, shunt release, auxiliary contact etc, it’s an ideal product for user.

The residual current circuit breaker can either be vertically installed (vertical installation) or be horizontally installed (horizontal installation)

The product is in accordance with the standards of IEC60947-2 and Gb140482

Product model

Note: There are four types of neutral pole (N pole) for four phases product.

The neutral pole of type A is not equipped with over-current tripping element, its always switched on, and it is not switched on or off together with other three poles.

The neutral pole of type B is not equipped with over-current tripping element, and it’s switched on or off together with other three poles(the neutral pole is switched on before being switched off)

The neutral pole of type C is equipped with over-current tripping element, and it’s switched on or off together with other three poles(the neutral pole is switched on before being switched off)

The neutral pole of type D is equipped with over-current tripping element, it’s always switched on and is not switched on or off together with other three poles.

Table 1

Classification

By breaking capacity: a standard type(type S) b higher breaking capacity type(type H)

By connection mode: a front board connection, b back board connection, c plugin type

By operation mode: a direct handle operation, b rotation handle opera-tion,c electrical operation

By number of poles: 2P, 3P, and 4P

By accessory: alarm contact, auxiliary contact, shunt release, under voltage release.

Normal Service Condition