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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 ]
tingfenghu
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1樓  發(fā)表于: 2021-04-03 22:25
引用
引用第112樓樓上小王于2021-04-03 09:14發(fā)表的  :
最近也遇到同樣的問(wèn)題，工廠(chǎng)進(jìn)線(xiàn)是3相5線(xiàn)380V，但我設備大多是單相220V負載，現在正在糾結零線(xiàn)線(xiàn)徑的選擇

那有什么糾結，
除了上面幾乎不可能發(fā)生諧波現象，
沒(méi)有見(jiàn)到過(guò)N線(xiàn)面積大于相線(xiàn)，最多是同等。
幾乎所有工廠(chǎng)配線(xiàn)設計都是N線(xiàn)小一級。
二手PLC,觸摸屏，伺服驅動(dòng)，各類(lèi)氣動(dòng)設備
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