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三相四线60a电表多少瓦

2025-03-15 03:03:10

推荐回答（1个）

回答1：

三相电的功率p=1.732*u*i*cosφ=380*1.732*60*0.8=31591w=31kw
保护电表一般是在其后面空气开关，防止电表过载和短路烧毁。空气开关选的和电表差不多大。能一样最好一样，你选63a就可以了。

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