CYD MCB

CYD MCB ApplicationCYD series miniature circuit breakers are composed of the moulded case,operating mechanism,contact system,arc-extinguishing system,tripping mechanism,etc.The case is made of the special plastic high in fire-resistance and strength,so it is very capable of resisting impact 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 well so that the time for 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 part 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 distinct current limiting characteristics. Main Technical DataStandardIEC898,GB10963,BS387.1Number of poles1P.2P.3P.4PRated current(In)1,2,3,4,6,10,16,20,25,32,40,50,63Rated voltage(Un)AC230/400VRated frequency50/60HzTripping curveB,C,DRelease action characteristicsTime delay1.13In≥1h non-trip1.45In<1h trip2.55In 1S<60S tripInstantaneous(Curve C)5In≥0.1S non-trip10In<0.1 tripMagnetic releases operateB curve:between 3 and 5InC curve:between 5 and 10InD curve:between 10 and 14InRated breaking capacity(Lcn)