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120kw用多大电缆
更新时间： 2020-10-31 00:00:00  

1、选择70平方的铜芯电线。120千瓦功率电流计算：三相：P=1.732UIcosφ。P：功率；U：电压；I：电流；cosφ：功率因数，电阻负载取1，感性（比如电机）负载取0.85；根号3=1.732，I=P/(1.732×U×cosφ)，I=120/(1.732×380V×0.85)=214A。

2、根据电线电流对照表，120KW负载至少要选择70平方的铜芯电线。70平方的铜芯电线明线敷设安全截流量约247A。

关键词： 120kw 电缆

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