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A suggested approach for specifying partial discharge testing as a new winding acceptance test

机译:指定局部放电测试作为新绕组验收测试的建议方法

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Partial discharge testing has been used for over 50 years as a diagnostic to assess the insulation condition of motor and generator stator windings rated 3.3 kV and above. As such, most of the North America's large utility generators already undergo routine on-line PD testing. Many users have expressed a desire to specify allowable PD levels for new stators or rewinds-to ensure acceptable manufacturing and assembly of the winding, especially for global VPI stators. Unfortunately there are no domestic or international standards that describe the acceptable PD levels. If PD tests are to be used as acceptance tests-then the users must insert this in their purchase specifications. One must be very careful when specifying PD for a new machine-to ensure that the test is both meaningful, yet not unreasonably difficult to pass. This paper reviews the reasons for this, and proposes a scientifically defensible way of specifying PD, that is independent of the test equipment used.
机译:局部放电测试已被用作诊断,以评估额定值为3.3 kV及以上的电动机和发电机定子绕组的绝缘状况。因此,北美大多数大型公用事业发电机已经进行了常规的在线局部放电测试。许多用户表达了希望为新的定子或重绕指定允许的PD级别-以确保可接受的绕组的制造和组装,尤其是对于全局VPI定子。不幸的是,没有描述可接受的PD水平的国内或国际标准。如果将PD测试用作验收测试,则用户必须将其插入其购买规格中。在为新机器指定PD时,必须非常小心-确保测试既有意义,又不会造成不合理的困难。本文回顾了造成这种情况的原因,并提出了一种科学合理的方法来指定PD,这与所使用的测试设备无关。

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