Method of detecting the wet arc fault in the AC power...

Details Method of detecting the wet arc fault in the AC power... Method of detecting the wet arc fault in the AC power...

2011-08-23

2011-08-23

Tang, Minh N (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S512000, C324S524000, C361S042000, C702S058000

Reexamination Certificate

active

08004287

ABSTRACT:
Methods for detecting wet arc faults are based on the direct current (DC) signature analysis and pattern matching pertaining to wet arc characteristics. While magnifying some wet arc fault signatures, it may be found that the wet arc current signal itself resembles a normal current signal in both time and frequency domains. The change in magnitude or high frequency behavior found may not be enough to distinguish a wet arc fault signature from a normal signature. Embodiments of the present invention may look at the magnitude change in the DC content per cycle of the wet arc current signal, which may be more positive in one cycle while, in the next cycle, it may be negative in a relative manner. A particular number of these changes may be determinative of a wet arc fault.

REFERENCES:
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patent: 2007/0188947 (2007-08-01), Sung
patent: 2008/0129307 (2008-06-01), Yu et al.

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