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sky6595418
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樓主  發(fā)表于: 2024-12-17 18:30
大神們,下圖這兩種, 電流怎么計算呢? 用多粗的線(xiàn)呢?
gaoyingchun
GaoYingChun
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1樓  發(fā)表于: 2024-12-20 10:56
1、看加熱管上的額定電壓，功率除以額定電壓得出阻值R

2、若供電電壓是3相380V時(shí)
      
      2.1、每根加熱管流過(guò)的電流，I=380/根3/R=220/R，至于你說(shuō)的380/2/R=190/R，那是線(xiàn)電壓380V，串2根加熱管的情況

      2.2、每根加熱管流過(guò)的電流，I=380/R，線(xiàn)電流=根3*I

      

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