MCB-CZ47

Scope of application MCB CZ47(DZ47) series circuit breakers are maily applied to the AC 50Hz/60Hz circuit with rated voltage 230V/400V or less,rated current up to 63A and provide circuits of modern buildings with overload and short-circuit protections, and it can also be used for operation and isolating the circuit infrequently. Construction Features MCB CZ47(DZ47) series miniature circuit breakers are composed of the moulded case,operating mechanism, contact system, arc-extinguishing system, tripping mechanism, ect. The case is made of the special plastic high in fire-resistance and strength,so it is very capable of resisting impace and light in weight. The parts of the operating mechanism employ high strength plastic products in order to assure the flexible, reliable operation and obtain the minimum moment of inertia as so that the time from the moment the short-circuit fault occurs to the operation of the tripping mechanism is very little. The tripping mechanism is composed of the two parts of bimetal sheet overload counter time limit tripping mechanism and short-circuit instantaneous electromagnetic mechanism. The contact arc-extinguishing system employs the special arc-conducting angle and gangway arc-extinguishing chamber so it has sidtinct current limiting characteristics.