| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely and conveniently discriminate a foam PD and a foreign material PD as a main cause of PD generation in an insulation test of an oil insulation device. Ž<P>SOLUTION: A partial discharge class discrimination apparatus detects a partial discharge, and discriminates a partial discharge class if an insulation abnormality occurs within the oil insulation device due to the partial discharge. The partial discharge class discrimination apparatus includes: a sensor 1 for detecting a signal generated by the partial discharge; a measurement instrument 2 for measuring a waveform length of the signal generated by the partial discharge and a polarity of a voltage applied when the partial discharge is generated; and a discrimination apparatus 3 for discriminating the partial discharge class based on the waveform length and the polarity. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
