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230问答网 > 400kW的负荷用多大低压电缆，怎么算的

400kW的负荷用多大低压电缆，怎么算的

2025-04-01 20:05:41

推荐回答（3个）

回答1：

400KW 电流为800A 100以上铜芯电缆的安全载流为每平方3A 铜芯线最大为240
240*3=720A 无法满足，你要选择2根150并列使用

回答2：

计算电流为759.69A 如选开关则选800A 的开关，这是电缆就应按800A选，VV22-3*240型铜芯电缆直埋条件安全载流量为400A，所以需要两根240并列使用。

回答3：

用三百五十平的铝缆

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