Grounding detector

Details Grounding detector Grounding detector

2007-01-18

2009-06-30

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

C324S503000, C361S045000

Reexamination Certificate

active

07554333

ABSTRACT:
A grounding detector includes a coupling capacitor connected at one end to an output terminal of a power supply and at another end to a measuring point, a voltage detector to detect a voltage amplitude generated at the measuring point, a pulse generator to generate a pulse signal at a prescribed frequency, to apply the pulse signal to the measuring point, and to generate a modified pulse signal having a modified frequency when the detected voltage amplitude is outside of a prescribed voltage range, the modified frequency being set below the prescribed frequency that existed when the voltage amplitude detected by the voltage detector is within the prescribed voltage range, and a grounding occurrence detection unit that detects the occurrence of grounding of the circuit based on the voltage amplitude detected at the measuring point during the application of the pulse signal to the measuring point.

REFERENCES:
patent: 6906525 (2005-06-01), Suzuki
patent: 2002/0121902 (2002-09-01), Suzuki
patent: 2002209331 (2002-07-01), None
patent: 2003250201 (2003-09-01), None
patent: 2003274504 (2003-09-01), None
patent: 2004053365 (2004-02-01), None
patent: 2004053367 (2004-02-01), None

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