| 摘要 |
A receptacle includes separable contacts, an operating mechanism structured to open and close the separable contacts, and two trip circuits. A first microprocessor-based trip circuit includes a first output having a first arc fault / ground fault trip signal, and a second output having a periodic pulsed signal. A second failsafe trip circuit includes an input having the periodic pulsed signal and an output having a second trip signal. The second failsafe trip circuit is structured to output the second trip signal responsive to failure of the first microprocessor-based trip circuit to provide the periodic pulsed signal. A third circuit responds to the first trip signal and the second trip signal and cooperates with the operating mechanism to trip open the separable contacts. |
