초록 ▼

A miniature circuit breaker incorporating ground fault protection and arc fault protection includes a test mechanism including a ground fault test circuit for testing a ground fault detector trip mechanism, and an arc fault test circuit for testing an arc fault detector trip mechanism. A state machi

A miniature circuit breaker incorporating ground fault protection and arc fault protection includes a test mechanism including a ground fault test circuit for testing a ground fault detector trip mechanism, and an arc fault test circuit for testing an arc fault detector trip mechanism. A state machine circuit automatically controls the test mechanism to sequentially test both of the ground fault and arc fault detector trip mechanisms. A test push button is interconnected with the state machine circuit and, when pressed, initiates sequential testing of both of the ground fault and arc fault trip mechanisms.

대표청구항 ▼

[ What is claimed is:] [1.] A circuit interrupter comprising:a housing;separable contacts mounted in said housing;an operating mechanism for opening said separable contacts when actuated;trip means for actuating said operating mechanism in response to predetermined current conditions, said trip mean

[ What is claimed is:] [1.] A circuit interrupter comprising:a housing;separable contacts mounted in said housing;an operating mechanism for opening said separable contacts when actuated;trip means for actuating said operating mechanism in response to predetermined current conditions, said trip means including ground fault trip means for actuating said operating mechanism in response to a ground fault, and arc fault trip means for actuating said operating mechanism in response to an arc fault;test means including ground fault test means for testing said ground fault trip means, and arc fault test means for testing said arc fault trip means;means for automatically controlling said test means to test both of said ground fault trip means and said arc fault trip means; anda test actuator in communication with said means for automatically controlling said test means to initiate testing of both of said ground fault trip means and said arc fault trip means.