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xbc5620924
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樓主  發(fā)表于: 2011-05-05 17:31
深井泵 45KW  電纜配幾平方的  急�。。。�！  控制柜到泵距離850米     打聽(tīng)一下最少都要用120平方的  需要做過(guò)這方面的證實(shí)      
[ 此帖被xbc5620924在2011-05-07 13:47重新編輯 ]
etdssdabb
只有學(xué)而知之，沒(méi)有生而知之
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1樓  發(fā)表于: 2011-05-06 07:55
當溫度為20攝氏度時(shí)，銅導線(xiàn)的電阻率ρ=0.0175Ω·mm2／m。希望你認真計算。

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