The extracted fault characteristics of transient zero sequence current is looked as condition attributes and the multiple of signal enhancement is.
将提取的暂态零序电流故障特征作为条件属性，信号增强倍数作为决策属性，构成一个决策系统。
First the zero sequence transient current signal sampled is enhanced, and then the signal enhanced is decomposed by using wavelet packet analysis to realize faulty line detection.
首先对采样的零序暂态电流信号做增强处理，然后利用小波包分析方法进行故障选线。
Use is made of that zero-sequence transformer outputs a voltage signal when phase-failure occurs in three-phase induction motor.
这种新方法的基础是零序变压器在三相异步电动机断相时输出一个电压信号。
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