Circuit interrupter with test actuator for ground fault and arc fault test mechanisms

摘要

A miniature circuit breaker (1) incorporating ground fault protection and arc fault protection includes a test mechanism (45,49) including a ground fault test circuit (49) for testing a ground fault detector trip mechanism (29), and an arc fault test circuit (45) for testing an arc fault detector trip mechanism (27). A state machine circuit (59) automatically controls the test mechanism (45,49) to sequentially test both of the ground fault and arc fault detector trip mechanisms (27,29). A test push button (9) is interconnected with the state machine circuit (59) and, when pressed, initiates sequential testing of both of the ground fault and arc fault trip mechanisms (27,29).