Entry from US English dictionary
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.
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