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50千瓦功率用380多大空开
更新时间: 2020-10-03 00:00:00  

可以选用125安培的空开

解释如下:

1、首先将这个功率满负荷运行下的理论电流计算出来,三相电流等于功率除以电压除以电压相位1点732除以负载功率因数;

2、不同负载功率因数不同,一般电动机等电感性功率因数0点75至0点85左右,一般加热管等电阻式负载功率因数为1;

3、电流等于50000除以380除以1点732除以0.9,电流约为84点4安培左右。

关键词: 千瓦 功率

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