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薛名海強
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樓主  發(fā)表于: 2009-07-28 21:36
各位大哥，我宿舍的三相四線(xiàn)，相線(xiàn)１５０mm2,為什么零線(xiàn)卻用２４０mm2��？
急！急！急！
[ 此帖被sjm213在2009-07-30 21:30重新編輯 ]
huxupin
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1樓  發(fā)表于: 2009-08-06 22:08
肯定不對了，三相四線(xiàn)制中的負載，也就是相當于在三相電源中的兩個(gè)單相負載的串連，零線(xiàn)只是起到平衡電壓的作用，經(jīng)過(guò)零線(xiàn)的電流是很小，除非三相負載嚴重不平衡，零線(xiàn)電流才很大。
huxupin
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2樓  發(fā)表于: 2009-08-06 22:11
有可能是你們的零線(xiàn)連接處很分散

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