Based on the analysis of AC impedance and two poles voltage test data, the reason of turn - to - turnshortcircuit fault caused by having copper dregs in generator rotor winding was found.
基于交流阻抗和两极电压试验数据的分析，发现发电机转子绕组因存在铜渣而造成匝间短路故障的原因。
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Damage be divided into two: one is a good set of stator shielding, and the occurrence of stator windings, the breakdown phase, the coil turn-to-turnshortcircuit, overload caused by burnt windings.