Patent ID: 7486492

Claim:
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, wherein said second trip circuit comprises: a fourth circuit receiving said repetitive signal and outputting an inverted signal, a capacitor including a voltage, a resistor charging said capacitor with said inverted signal, and a fifth circuit receiving the voltage from said capacitor and outputting said second trip signal.