Hybrid type sensor for detecting high frequency partial discharge
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United States of America Patent
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Aug 30, 2005
Grant Date -
Jul 8, 2004
app pub date -
Oct 9, 2003
filing date -
Oct 10, 2002
priority date (Note) -
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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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