10kv电力系统中中性点不接地,那么人站在地上模火线是不是不触电啊?

2025-03-13 20:53:29
推荐回答(2个)
回答1:

10KV为中心点不接地系统,当人站在地上摸火线的时候,流过人体的是10KV供电系统产生的等效电容电流。
供电系统都是有电气设备、电缆和线路组成的,这些元件对地都有一些电容,当加上10KV电压后,就会有电容电流出现。当供电系统很小,电容电流很小的时候,人接触火线确实不会触电,在文革前,有一些小企业的10KV供电系统确实也有过带电检修。但是现代的10KV供电系统都很大,其电容电流也很大,试验证明,当流过人心脏的电流三国0.8A时,就会发生心脏痉挛而死亡。而现在企业中的10KV供电系统,其电容电流一般都大于5A,有些甚至大于10A,所以人是不能站在地面上去摸火线的。而回路保护也要求,当电容电流小于5A时,发生接地故障就发出警报,如果大于5A,就直接跳闸断电。

回答2:

要触电的,因为系10KV火线上任何一点都超过人体安全电压值

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