Application

DZ20 series molded case circuit breaker andDZ20□W no-flashover circuitbreaker(hereinafterreferredtoascircuitbreaker)aresuitablefordistributingline of AC 50Hz (or 60Hz), ratedcurrent 1250A, rated insulation voltage 690Vand rated working voltage 380 (400)V or below,used to distribute electric energy and protect circuit and power equipment against overload,short circuit and under voltage. Hereinto, typeY, J, G circuit breakers of rated current 225Aand type Y circuit breakers of rated current400A and below also can be used to protectmotor. Under normal condition, they also canbe applied to switching circuit and starting themotor infrequently respectively. The products are in conformity with such standardsas GB 14048.2, GB 14048.4, IEC 60947-2 andIEC 60947-4.