Hybrid switch using a one-shot firing pulse

摘要: Semiconductor switching elements (inverse-parallel connected thyristors) of each main circuit element unit are in parallel to a contact an electromagnetic contactor. An operation input voltage signal applied coil the contactor is detected by input-voltage detecting control section. When closed and opened, one-shot-pulse generating outputs one-shot pulse based on output indicating opening/closing state auxiliary normally-closed The semiconductor made only for short time firing pulse, turn off load current.