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liyanjunx
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樓主  發(fā)表于: 2015-05-12 20:14
]本廠(chǎng)有一臺30KW三相異步電動(dòng)機水泵，功率因數0.91，電機效率取0.89用鉗表測量電流是68A，控制柜電流表也顯示這么多，按照功率計算：1.73*380*68*(cos=)0.91/0.89=44.7KW，那么每小時(shí)用電是45度電了嗎？而不是電機標牌所寫(xiě)30KW，請問(wèn)你們遇到這種情況沒(méi)有？應該要怎樣算？
sanlihu
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1樓  發(fā)表于: 2015-05-12 20:43
你的理解是正確的，30KW是電機軸輸出的功率并不是電機消耗的功率。
吉圓電氣 QQ751673698
忍緣善
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2樓  發(fā)表于: 2015-05-12 20:48
按正常計算你30KW電機而定電流是約54A左右，你檢查都是68A，那就說(shuō)明你的電機負載大了或者你的電壓低。假如是68A電流功率因數0.9那是大約是42.39KW羅，當然是會(huì )按42.39運行耗電計算的
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