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hlq720827
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12樓  發(fā)表于: 2012-12-08 14:58
三項不平衡，中性線(xiàn)有零序電流，變壓器中性點(diǎn)接地電阻太大了
kevinzang
感應一切
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13樓  發(fā)表于: 2012-12-08 15:00
只能用排除法一點(diǎn)點(diǎn)的查了。
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