Self testing ground fault circuit interrupter (gfci) with...

Details Self testing ground fault circuit interrupter (gfci) with... Self testing ground fault circuit interrupter (gfci) with...

H - Electricity

01

H

H01H 83/04 (2006.01)

Patent

CA 2555458

A self test (ST) ground fault circuit interrupter (GFCI) provides improved end of life (EOL) detection by rejecting false EOL information. A processing device receives fault detection signals indicating when faults are detected, and input signals indicating when contacts used to interrupt power to a load are closed. The processing device rejects the fault detection signals when they fail to meet a selected condition and the contacts are closed, and declares end of life (EOL) when the selected condition is met. The fault detection signals can correspond to pulses at an output of a gated device between the processing device and a GFCI chip, and the selected condition can be a selected integer number of pulses.

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