切換きりかえスイッチ

noun

change-over switch; transfer switch

Technical term for a switch that changes the connection from one circuit to another, used in electrical engineering.

• この装そう置ちには切きり換かえスイッチが付ついていて、電でん源げんを切きり替かえられます。

  This device has a change-over switch, so you can switch the power source.