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电缆故障点如何进行查找

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电缆故障点如何进行查找

发布日期:2019-04-30 00:00 来源:http://puhe169.com 点击:

河北快3DIANLANGUZHANGDIANRUHEJINXINGCHAZHAO


河北快3XIAMIANGENJUDIANLANCHANGJIADEJINGYAN,HUAZHONGXIANLANJIESHAOJIZHONGCHAZHAOGUZHANGDIANDEFANGFA。

河北快31、DIANLANGUZHANGDIANDECHAZHAOFANGFA

(1) 测声法:所谓测声法就是根据故障电缆放电的声音进行查找,该方法对于高压电缆芯线对绝缘层闪络放电较为有效。此方法所用设备为直流耐压试验机。在故障处电缆芯线对绝缘层放电产生“滋、滋”的火花放电声,对于明敷设电缆凭听觉可直接查找,若为地埋电缆,则首先要确定并标明电缆走向,再在杂噪声音zui小的时候,借助耳聋助听器或医用听诊器等音频放大设备进行查找。查找时,将拾音器贴近地面,沿电缆走向慢慢移动,当听到“滋、滋 ”放电声zui大时,该处即为故障点。使用该方法一定要注意安全,在试验设备端和电缆末端应设专人监视。

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