| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a winding interlayer short circuit monitoring device for an electrical machine and apparatus for always monitoring the interlayer short circuit from a viewpoint of a preventive maintenance and predicting the occurrence of the short circuit. <P>SOLUTION: The winding interlayer short circuit monitoring device for the electrical machine and apparatus comprises a zero-phase current transformer 9 clamped to a power line of the apparatus having a winding to detect an interlayer short circuit pulse generated from the power line, a pulse amplifying unit 31 for processing to extract an interlayer short circuit pulse current detected by the transformer, a level setting unit 32 for judging that an amplitude and occurring frequency of the pulse processed by the amplifying unit exceed predetermined levels, and a warning unit 33 for generating an alarm when the amplitude and the frequency of the amplifying unit exceed the set levels in the judgment of the setting unit. <P>COPYRIGHT: (C)2003,JPO |
