Arcless DC Circuit Breaker using Semiconductor Switch

摘要

An arc suppression type DC breaker using a semiconductor switch is provided. An arc suppression type DC circuit breaker using a semiconductor switch according to an embodiment of the present invention includes a semiconductor switch that is turned on and off to supply or cut off DC power to a load; A mechanical contact switch connected in parallel with the semiconductor switch; The mechanical contact switch is turned on according to the selection of the first push switch, the mechanical contact switch is turned on after the lapse of the first set time, the mechanical contact switch is turned off according to the selection of the second push switch, A sequential controller for sequentially controlling the semiconductor switches to be turned off; And the semiconductor switch is turned on or off according to the sequential control of the sequential controller to sense the load current of the load so that the mechanical contact switch and the semiconductor switch are sequentially turned off And a main controller for controlling the sequential controller.