circuit breaker
US /ˈsɜːr.kɪt ˌbreɪ.kər/
UK /ˈsɜːr.kɪt ˌbreɪ.kər/
1.
an automatic device for stopping the flow of current in an electric circuit as a safety measure
:
•
The lights went out because the circuit breaker tripped.
•
You need to reset the circuit breaker to restore power.