Electrical switching apparatus including a second trip circuit responding to failure of a first trip circuit to provide a repetitive signal
First Claim
1. An electrical switching apparatus comprising:
- separable contacts;
an operating mechanism structured to open and close said separable contacts; and
a trip mechanism comprising;
a first trip circuit including a first output having a first trip signal and a second output having a repetitive signal, a second trip circuit including an input having said repetitive signal and an output having a second trip signal, said second trip circuit being structured to output said second trip signal responsive to failure of said first trip circuit to provide said repetitive signal, and a third circuit responsive to said first trip signal and said second trip signal and cooperating with said operating mechanism to trip open said separable contacts.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
69 Citations
22 Claims
-
1. An electrical switching apparatus comprising:
-
separable contacts;
an operating mechanism structured to open and close said separable contacts; and
a trip mechanism comprising;
a first trip circuit including a first output having a first trip signal and a second output having a repetitive signal, a second trip circuit including an input having said repetitive signal and an output having a second trip signal, said second trip circuit being structured to output said second trip signal responsive to failure of said first trip circuit to provide said repetitive signal, and a third circuit responsive to said first trip signal and said second trip signal and cooperating with said operating mechanism to trip open said separable contacts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. An arc fault or ground fault circuit interrupter comprising:
-
separable contacts;
an operating mechanism structured to open and close said separable contacts;
a first arc fault or ground fault trip circuit including a first output having a first arc fault or ground fault trip signal and a second output having a repetitive signal;
a second trip circuit including an input having said repetitive signal and an output having a second trip signal, said second trip circuit being structured to output said second trip signal responsive to failure of said first trip circuit to provide said repetitive signal; and
a third circuit responsive to said first arc fault or ground fault trip signal and said second trip signal and cooperating with said operating mechanism to trip open said separable contacts.
-
-
22. A receptacle comprising:
-
separable contacts;
an operating mechanism structured to open and close said separable contacts;
a first trip circuit including a first output having a first trip signal and a second output having a repetitive signal;
a second trip circuit including an input having said repetitive signal and an output having a second trip signal, said second trip circuit being structured to output said second trip signal responsive to failure of said first trip circuit to provide said repetitive signal; and
a third circuit responsive to said first trip signal and said second trip signal and cooperating with said operating mechanism to trip open said separable contacts.
-
Specification