柯林斯詞典circuit breaker (circuit breakers) 1. N-COUNT A circuit breaker is a device which can stop the flow of electricity around a circuit by switching itself off if anything goes wrong. 斷電器 There is always an internal circuit breaker to protect the instrument from overload. 縂有一個斷電器以防止儀器超負荷運轉。 返回 circuit-breaker