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三类防雷，电缆进线全程埋地进入单体，该单体的进线配电箱处要做第一级SPD防护吗？ - 工程施工 - 项目管理 - 氿上知道
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满意答案
2.但线间或线对地，由于线路绝缘隔离，实际上本质就是线与线间的较大电容，或线对地存在的电容
3.电容的容抗f越大Xc越小，在电容侧通以巨大的雷电电流(呈高频特性)，那么泄漏电流就非常巨大的.雷电电流击打在金属管路上，会透过对地电容串入到线路中，对电气设备造成伤害
因此不用设置进线电源SPD是错误的
下午茶Zeo
回答于：2013-11-11
共2条回答