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首先要计算100KW负荷的线电流。
对于三相平衡电路而言,三相电路功率的计算公式是:P=1.732IUcosφ。
由三相电路功率公式可推出:
线电流公式:I=P/1.732Ucosφ
式中:P为电路功率,U为线电压,三相是380V,cosφ是感性负载功率因数,一般综合取0.8你的100KW负载的线电流:
I=P/1.732Ucosφ=100000/1.732*380*0.8=100000/526.53=190A
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