试题与答案

关于感应法测定电缆故障的说法正确的是?() A.感应法是给电缆芯通以音频电流,当音频

题型:多项选择题

题目:

关于感应法测定电缆故障的说法正确的是?()

A.感应法是给电缆芯通以音频电流,当音频电流通过故障点时,电流和磁场将发生变化,利用接收装置及音频信号放大设备听测或观察信号的变化,来确定故障点的具体位置

B.一般只适用于听测低阻相间短路故障,有时在特殊情况下能听测低阻的接地或断线故障。

C.感应法可用于听测电缆埋设位置、深度及接头盒位置,有助于准确地找出电缆故障。

D.感应法是给电缆芯通以工频电流,当工频电流通过故障点时,电流和磁场将发生变化,利用接收装置及信号放大设备听测或观察信号的变化,来确定故障点的具体位置

答案:

参考答案:A, B, C

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