接线户如何防雷--qsf999的安全生产小屋

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接线户如何防雷 | 2012-1-18 20:26:00

接线户如何防雷

    由于低压线路遭雷击引起的人身伤亡事故常有发生，多数发生在木杆线路上，只有少数发生在混凝土杆线路上，但凡是接户线绝缘子铁脚可靠接地的场所均未发生过雷电伤亡事故。
    木杆线路的绝缘水平很高，其对地的冲击绝缘水平高达500 kV，　雷击后雷电流不能尽快泄入大地，而是顺着导线侵入用户室内，而室内受电设备的绝缘水平又很低，人们接触的机会又多，因此易酿成雷击事故。
    为避免雷电波顺着导线入侵室内造成伤亡事故，下列情况应将绝缘子的铁脚作可靠的接地：
    　　(1) 多雷区或易受雷击地段的接户线；
    　　(2) 木杆线路的所有接户线；
    　　(3) 人员密集的教室、影剧院、礼堂等公共场所的接户线；
    　　(4) 电动机的引接线。
    这样，当低压架空线路遭受雷击时，入侵波行至该铁脚接地处即对地放电，将雷电流泄入大地，降低雷电波电压幅值，从而保护了室内人身安全和设备安全。

By:qsf999 | 阅读全文 | 回复(11) | 引用通告 | 编辑

Re:在漫画中识别身边的违章 | 2017-2-20 17:31:45

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By:uskmq(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

Re:在漫画中识别身边的违章 | 2016-10-21 12:50:28

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By:dzrsw(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

Re:在漫画中识别身边的违章 | 2016-10-17 5:15:47

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By:earvy(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

Re:在漫画中识别身边的违章 | 2016-10-15 5:08:34

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By:vafhl(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

Re:在漫画中识别身边的违章 | 2016-10-13 15:05:26

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By:mlbdh(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

Re:在漫画中识别身边的违章 | 2016-10-8 18:38:56

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原创 | 2016-9-30 15:54:49

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原创 | 2016-9-28 21:11:51

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原创 | 2016-9-6 21:37:31

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