| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an interlayer insulation diagnosis technique capable of discriminating between partial discharge in an interlayer insulation and partial discharge in an insulation to the ground, and diagnosing an insulation state. <P>SOLUTION: To each coil or each block comprising a plurality of coils of a dynamo-electric machine, a probe 2 for detecting partial discharge current from a coil to be diagnosed is connected, the partial discharge current detected by the probe 2 is derived via an interface device 540, the polarity of the derived partial discharge current is discriminated by a computer 510, it is discriminated whether the partial discharge current is caused by partial discharge by the interlayer insulation, or partial discharge in the insulation to the ground, and whether there is an abnormality in the interlayer insulation is determined by comparison with a reference value stored beforehand, and its result is outputted. <P>COPYRIGHT: (C)2007,JPO&INPIT |
