|转至：输配电线路
架空输电线路知识快问快答
问：为什么电力安规中要求耐张串挂线前，需要使用导体将耐张绝缘子短接？网友A:防感应电。当在建线路附近有在运线路。特别是在运线路电压等级较高，平行距离较长，相隔距离较近时。在建线路的导地线会有较大的感应电。为防止感应电伤人，因此需要在耐张串挂线前，使用导体将耐张绝缘子短接。
▲导体将耐张绝缘子短接
网友B：500kV线下搭木质跨越架，绑扎铁上就有静电。
答：临时设置地锚,采用埋土地锚时,地锚绳套引出位置应开挖马道,马道与受力方向应一致。
▲地锚马道
问：如果110kV地线防振锤滑到档中，下面是跨越铁路，有没有好的方法把它追回或拆除。前提是地线老旧不能上人。答：建议报铁路单位同意，采用旧地线牵引新地线的方法，把旧地线更换掉，同时拆除地线防振锤。
问：直流线路的接地极线路，平常运行的时候是带电的吗？答：接地极线路一般没电。但是每年有对接地极放电的时候，因此如果涉及接地极线路，电气按35千伏考虑，交叉跨越按110kV线路考虑。
▲直流线路及其接地极线路
问：OPGW光缆的接头盒和余缆架高度一般如何确定？答：接续盒的安装距离一般离地面约10米，余缆架离地面约8米。
答：10kV线路一般不会停电，都是采用退出重合闸，搭跨越架或者封网带电跨越。
答：可参考《运河通航标准》(JTS180-2-2011)，详细条文如下：
答：见下图：
答：“三跨”与跳线串无关，所有“三跨”文件中均未对跳线串采用双联串有要求。
“三跨”反事故措施的具体要求：
答：h表示对应交叉跨越线路的高度（全高），用以评估交叉跨越是否安全。上面的35.8、35.9则表示其地面高程。
10
答：基础实际外露值是指基础施工完后主柱实际露出地面的高度，为“基础顶面标高”-“基础中心原始地面标高”。
基础图纸中基础主柱“计算露头”值是计算假定露头值，并非基础实际外露值。基础实际外露值不宜小于200mm 且不得大于基础计算露头值。
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