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30kw用多大电缆

更新时间: 2021-04-28 08:41:09     

1、如果是380V,导线电流密度是5A/MM2 30KW要最小要用10平方毫米的电缆和60安培的开关。

2、 根据三相电功率计算公式:P=√3UIcosa(cosa是功率因数,一般取值0.85) I=30000÷(1.732×380×0.85)=53.625(A);导线截面积=53.625÷5=10.725(平方毫米)。

关键词: 30kw 电缆

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