METHOD FOR DETECTING WATER LEAKAGE OF COIL AND WATER LEAKAGE DETECTOR APPLICABLE TO THIS METHOD
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United States of America Patent
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Issued Date -
Mar 25, 2010
app pub date -
Jun 22, 2006
filing date -
Jun 23, 2005
priority date (Note) -
Abandoned
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Abstract
According to the present invention, a method of detecting water leakage in a coil, which determines whether or not cooling water leaks into an insulation layer, the water being supplied to a conductor of a coil covered with the insulation layer, including: applying an AC voltage to the conductor; bringing a surface electrode device into pressure contact with the insulation layer; grounding the surface electrode device through an impedance; measuring a potential of the surface electrode device; and determining that the cooling water leaks from the conductor into the insulation layer when a measured potential is higher than a potential of a normal coil
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