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樓主  發(fā)表于: 2011-05-08 10:35
謝謝大
etdssdabb
只有學(xué)而知之,沒(méi)有生而知之
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1樓  發(fā)表于: 2011-05-09 08:13
2樓說(shuō)得對,380V理論上達到土7%。220V單相供電電壓偏差為標稱(chēng)電壓的+7%,-10%。工廠(chǎng)供電很難控制,通?梢蕴子220V的要求,即:+7%,-10%。也要根據用電設備的要求。

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