对于三相四线制电缆计算出容量后是一相的还三条线的全部容量？ 三相电力电缆计算电流和容量？
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\u4e09\u76f8\u7535\u7f06\u8f7d\u6d41\u91cf\u8ba1\u7b97\u65b9\u6cd5\uff1a
\uff081\uff09\u6839\u636e\u4e09\u76f8\u7535\u76f8\u7ebf\u7535\u6d41\u8ba1\u7b97\u516c\u5f0f I=P\u00f7(U\u00d71.732\u00d7cos\u03a6)
P-\u529f\u7387(W)\uff1bU-\u7535\u538b(380V)\uff1bcos\u03a6-\u529f\u7387\u56e0\u7d20(0.85)\uff1bI-\u76f8\u7ebf\u7535\u6d41(A)
\u5e26\u5165\u6570\u636e\uff1a\u7535\u673a\u529f\u7387P=7.5kw\uff0c\u7535\u538bU=380V \uff1b
\u8ba1\u7b97\u5f97\uff0c\u76f8\u7ebf\u7535\u6d41I=13.3A
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13.3\u00f78=1.66mm^2\uff0c
\u7535\u7f06\u6700\u8fd1\u7684\u89c4\u683c\u4e3a2.5mm^2
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\u6982\u5ff5
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25平方电缆电流100A,是指每根芯线的额定载流量。
单相220V容量：220x100=22000(W)=22KW。三根就是3x22=66KW
三相380V容量：√3x380x100=65818(W)≈66KW
380=√3x220。上式可变为：√3x√3x220x100=3x220x100=66KW)
绛旓細25骞虫柟鐨勯摑鑺鐢电紗锛屽ぇ绾﹀彲浠ュ甫100A鐢垫祦 25骞虫柟鐨勯摐鑺數缂嗭紝澶х害鍙互甯140A鐢垫祦 25骞虫柟鐨勯摑鑺數缂嗭紝浣跨敤220VAC鏃讹紝澶х害鍙互甯22kW;浣跨敤380VAC鏃讹紝澶х害鍙互甯38kW 25骞虫柟鐨勯摐鑺數缂嗭紝浣跨敤220VAC鏃讹紝澶х害鍙互甯31kW;浣跨敤380VAC鏃讹紝澶х害鍙互甯53kW ...
绛旓細100涓崈鐡﹁鐢95骞虫柟姣背鐨鐢电紗锛屼笁鐩稿洓绾跨殑銆傛牴鎹涓夌浉鍥涚嚎鍒鍔熺巼璁＄畻鍏紡锛歅=鈭3UIcosb锛坈osb涓哄姛鐜囧洜鏁帮紝涓鑸彇鍊0.85锛塈=P梅锛堚垰3Ucosb锛=100000梅锛1.732脳380脳0.85锛=178.75锛堝畨鍩癸級鏍规嵁瀹夊叏杞芥祦閲忚〃鏌ュ緱锛屼娇鐢95骞虫柟姣背鐨勯摐鑺绾跨數缂嗐
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