| 摘要 |
An aircraft circuit breaker (1) includes a housing (112) having an opening (123), separable contacts (100), an operating mechanism (102) structured to open and close the contacts, and a trip mechanism (104) structured to cooperate with the operating mechanism to trip open the operating mechanism. The trip mechanism includes a first bimetal (184) to trip open the operating mechanism responsive to a thermal fault, a second ambient compensation bimetal (190) to compensate the first bimetal, and an arc fault trip circuit (98,105) to trip open the operating mechanism responsive to an arc fault. An indicator (122) includes an indicator portion (108) and a leg (110) disposed from the indicator portion. A spring (111) biases the indicator portion. The second bimetal holds the leg of the indicator, thereby holding the indicator against the spring bias. The second bimetal releases the leg of the indicator responsive to the arc fault trip circuit and the arc fault, thereby releasing the indicator to the spring bias. |
