Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2005-08-30
2005-08-30
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C324S551000
Reexamination Certificate
active
06937027
ABSTRACT:
Disclosed herein is a hybrid type sensor for detecting high frequency partial discharge which can detect high frequency partial discharge at a high signal-to-noise ratio without being influenced by power noise and surrounding noise, and guarantee the safety of a test when breakdown occurs. The sensor forms two or three signal paths with different impedances wherein a low frequency power signal is bypassed to ground through a first path, and a high frequency partial discharge current is allowed to flow through a second path and is detected as a resistance component through a resistor. Further, a surge voltage input to the sensor due to breakdown is input to the ground through a third path.
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Jee-Hong, Kim and Ja-Yoon, Koo; “An Investigation of the Applicablity of the Hybrid Sensor for Detecting High Frequency Partial Discharge”; JICABLE '03—6thInternational Conference on Insulated Power Cables, Information Programme Registration, Jun. 20-26, 2003, Paris-Versailles, France; 7 pgs.
Kim Jee Hong
Koo Ja Yoon
Deb Anjan
Hanyang Hak Won Co. Ltd.
Nguyen Hoai-An D.
The Webb Law Firm P.C.
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