Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2007-08-14
2007-08-14
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
Reexamination Certificate
active
11294409
ABSTRACT:
In the measurement of partial discharge, a voltage detected by an antenna is input to a spectrum analyzer and a phase difference between an operating voltage and a power supply of the spectrum analyzer is obtained by phase domain analysis using the spectrum analyzer. Based on the phase difference and the voltage phase shift associated with the input impedance of a signal converter circuit, the time axis displayed on the screen of the spectrum analyzer is compensated. After the compensation has been carried out, the voltage detected by the antenna is input into the spectrum analyzer and the partial discharge pattern which synchronizes with the operating voltage is measured by phase domain analysis using the spectrum analyzer.
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Endo Fumihiro
Kato Tatsuro
Moriyama Tomohiro
Rokunohe Toshiaki
Shinohara Ryoichi
Japan AE Power Systems Corporation
Mattingly, Stanger Malur & Brundidge PC
Nguyen Vincent Q.
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