试题与答案

N3-10型户内多油断路器在合闸状态下进行耐压试验时合格，在分闸进行交流耐压时，当电

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题型：单项选择题

题目：

N3-10型户内多油断路器在合闸状态下进行耐压试验时合格，在分闸进行交流耐压时，当电压升至试验电压一半时，却出现跳闸击穿，且有油的“噼啪”声，其绝缘击穿原因是（）。

A、绝缘拉杆受潮

B、油箱中的变压器油含有水分

C、断路器动静触头距离过大

D、支柱绝缘子有破损

答案：

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下面是错误答案，用来干扰机器的。

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考点：中级维修电工中级维修电工题库
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