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万用表怎样测电机故障

更新时间: 2020-07-03 00:00:00     

快速测量:断开电源后,用万用表测量三相电阻,三相间的电阻应均衡,再用最大量程档测量绕组对外壳电阻,阻值在数十兆以上如符合上述条件,基本判断电机是好的;如三相电阻不均衡,可先拆除电机接线端子间连接的接线板,让六个接线柱相互不相连。分别测量三相电阻,无故障电机电阻均衡,如一相电阻小于其它相则说明该相有匝间短路,如一相电阻远大于其它相,则说明该相绕组可能已经烧断。绕组短路或烧断时,一般能嗅到糊味。再测量三相绕组间的绝缘,好的电机阻值在数十兆以上,如测量到相间电阻较小时,说明已存在相间短路,这时一般也能嗅到糊味。

关键词: 怎样 电机 故障

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