Ground fault detector and associated logic for an electronic...

Details Ground fault detector and associated logic for an electronic... Ground fault detector and associated logic for an electronic...

H - Electricity

02

H

H02H 3/14 (2006.01) G01R 31/24 (2006.01) H02H 3/33 (2006.01) H05B 41/285 (2006.01) H02H 3/027 (2006.01)

Patent

CA 2104623

ABSTRACT An embodiment of the present invention is a lighting system including a sense transformer with two primaries and a secondary for receiving alternating current (AC) from a power source, a low ohmage resistor placed across the sense transformer secondary winding for preventing saturation of the core of the sense transformer, an analog comparator for detecting when ground-fault signals in the sense transformer secondary winding exceed a threshold voltage and digital counters for testing whether or not a ground- fault condition persists longer than three consecutive half-cycles of the received alternating current from the power source.

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