Patent ID: 10811203

Abstract:
The present disclosure proposes a switching device which, when supplying and interrupting power by combining a mechanical relay with a solid-state relay, suppresses the effects of chattering from the mechanical relay, and thus makes it possible to stably supply and interrupt power. Provided is the switching device including: a semiconductor relay configured to switch between supplying and interrupting power from a power supply; a mechanical relay configured to be connected in parallel to the semiconductor relay and connected at one end to a control terminal of the semiconductor relay; and a switch configured to switch between supplying and interrupting current to the semiconductor relay. The semiconductor relay turns on by high voltage being applied to the control terminal after current flows through a coil of the mechanical relay and a contact is switched, and the semiconductor relay turns off by low voltage being applied to the control terminal after current stops flowing through the coil of the mechanical relay and the contact is switched.