KCS series dissolve switch without contact is electronic power components which can parallel connect power and capacity can speed cast and cut. Its electric construction are made of power which anti-parallel connect crystal gate mould, isolated circuit, contact circuit, synchronous circuit, protection circuit and drive dircuit. Mean while it equips terminal which control switch ON and OFF. The control logistic voltage is OV(OFF), 12V(ON). This switch has nice features, such as easy installation, convenient maintenance, fast respond, cast and cut without spill, no noise, steady and reliable work, short-phase protection etc, is an ideal component to power dy namic compensator equipment w/o power of cast and cut capacitor groups.