Patent ID: 9397493
Filing Date: 2016-07-19
CPC Classification: H02H,H02J,Y02B

Claim Text:
1. A switching device comprising: an electric power line for receiving direct current voltage outputted from an electric power supply; a main switch circuit interposed in series between the electric power line and a power receiving unit; a control unit for turning ON or OFF the main switch circuit; a protection unit for forcibly turning OFF the main switch circuit when the voltage inputted to the power receiving unit exceeds a predetermined upper limit voltage; and a suppressor circuit connected to the electric power line; wherein the control unit is structured to suppress the voltage inputted to the electric power line to less than the upper limit voltage using the suppressor circuit prior to switching the main switch circuit from OFF to ON; and wherein the suppressor circuit comprises a sub-switch circuit turned ON and OFF by the control unit and connected to the electric power line, and a current drawing circuit structured to draw in current from the electric power supply when the sub-switch circuit is turned ON.