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40kw380v用多大電纜
40kw380v用多大電纜
更新时间:2024-08-06 19:17:24

  1、40千瓦的三相380V電機要用25mm2的鋁電纜,20mm2的銅電纜。

  2、由三相電機公式得:P=1.732UIcosΦ

  3、所以功率40kw的額定電流I=P/1.732UcosΦ=40/1.732/0.38/0.8=40/0.53=75A,cosΦ為0.8。電壓為380V。

  4、根據電流75A,查電纜手冊YJV知,需要用25mm2的鋁電纜,20mm2的銅電纜。

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