Leakage detecting device

Details Leakage detecting device Leakage detecting device

2008-05-20

2008-05-20

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

Reexamination Certificate

active

07375936

ABSTRACT:
As a result that a switching circuit switches between a first power source for supplying power when illuminating a light emitting diode and a second power source for supplying a predetermined bias to the light emitting diode, a reference signal output from a reference power source is compared with a leak current of an LED lighting device using the light emitting diode, a control signal is generated based on the comparison result, and a display means displays a leakage result when the leak current of the lighting device using the light emitting diode is higher than a reference value; a bias is set to a value, by which a current flowing to the light emitting diode can be ignored, and a leak current flowing to the lighting device using the light emitting diode is detected.

REFERENCES:
patent: 4743998 (1988-05-01), Wu
patent: 7053875 (2006-05-01), Chou
patent: 7088880 (2006-08-01), Gershman
patent: 05-130773 (1993-05-01), None
patent: 05-260642 (1993-10-01), None

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