根据电动机首末端两侧电流波形及现场的实际情况，指出电流互感器饱和是导致这次事故的直接原因。
According to the current waveform and actual condition of the motor at two sides of the terminal, it is pointed out that the transformer saturation is the direct reason of causing this fault.
分析了事故原因，认为套管制造工艺缺陷是引起此次事故的直接原因，并提出了预防类似事故的措施。
It is pointed out that the manufacturing defect of bushing is the direct reason for this failure. And how to prevent such similar failure is given here.
企业生产中发生的意外事故，70%以上是由于人的因素造成的，人的不安全行为是造成事故的直接原因。
The contingency happening in enterprise's production, more than 70% caused the human factor, people's unsafe behavior is the direct reason for accident.
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