contactor
/ˈkäntaktər/ /kənˈtaktər
/noun
A device for making and breaking an electric circuit.A combination circuit breaker/motor starter includes a circuit breaker trip unit having a microprocessor and at least one removably connectable contactor or other functional module....
- Rewire the ignition switch so that it can turn on all the new equipment, including the contactor.
- That Sunday, our electricians discovered the external-power contactor, installed in 1983, had broken.