KDW-based reactive power compensation regulator (capacitive non-contact switch) is a fast parallel capacitor can e-type switching power devices, the main circuit of the regulator anti-parallel thyristor module, by other electronic groups items constitute the trigger circuit, synchronization circuit and control circuit. The regulator control circuit and the controller control signals using optical isolation to avoid interference. When the controller issued a switching signal, the thyristor turn-on or off, to put into or the removal of the corresponding capacitors. The regulator installation, wiring, easy to maintain investment capacitor no flow, no over-voltage, work, no noise, breaking no arc, allowing fast, frequent moves, with lack of protection features, is to replace the current compensation device widely use of the electromagnetic AC contactors the best choice.