CPG三相電機過載一般有(you)以下原因，可分(fen)別處理(li)：

1、端子電(dian)(dian)壓(ya)(ya)太低(di)。端電(dian)(dian)壓(ya)(ya)是(shi)指減速電(dian)(dian)機(ji)啟動或滿載時(shi)在電(dian)(dian)機(ji)端子測(ce)得(de)的(de)電(dian)(dian)壓(ya)(ya)，而不是(shi)線路空載電(dian)(dian)壓(ya)(ya)。在負(fu)載不變的(de)情況下，如(ru)果(guo)電(dian)(dian)壓(ya)(ya)降低(di)，電(dian)(dian)流必然增大(da)(da)，因(yin)此減速電(dian)(dian)機(ji)的(de)溫升(sheng)也會增大(da)(da)。尤其是(shi)電(dian)(dian)壓(ya)(ya)過(guo)低(di)時(shi)，情況更(geng)為嚴重，繞組(zu)往(wang)(wang)往(wang)(wang)過(guo)熱時(shi)間過(guo)長。電(dian)(dian)壓(ya)(ya)低(di)有時(shi)是(shi)高(gao)壓(ya)(ya)電(dian)(dian)源本身電(dian)(dian)壓(ya)(ya)低(di)造成的(de)，應由(you)供電(dian)(dian)部門通(tong)過(guo)調整(zheng)變壓(ya)(ya)器(qi)分接開關(guan)來改(gai)善；如(ru)果(guo)壓(ya)(ya)降過(guo)大(da)(da)，應適(shi)當增加線導體(ti)的(de)截(jie)面來解決(jue)問(wen)題。

2、三相電(dian)機過載，繞(rao)(rao)組(zu)連接(jie)方式不符合要求。原(yuan)接(jie)Y的繞(rao)(rao)組(zu)在維修時誤接(jie)。原(yuan)兩(liang)相繞(rao)(rao)組(zu)承(cheng)(cheng)受(shou)380V電(dian)壓(ya)。故障連接(jie)后形成單相繞(rao)(rao)組(zu)，可承(cheng)(cheng)受(shou)380V電(dian)壓(ya)。結構空載電(dian)流(liu)大于額定(ding)電(dian)流(liu)，繞(rao)(rao)組(zu)很快燒壞。

3、振(zhen)動電(dian)(dian)機廠家表示在(zai)380V電(dian)(dian)壓(ya)條件下(xia)，錯接后(hou)形(xing)成的兩(liang)組(zu)(zu)繞(rao)組(zu)(zu)承受(shou)380V電(dian)(dian)壓(ya)，導致功率下(xia)降。在(zai)遠低于額定電(dian)(dian)壓(ya)的情況下(xia)，如果減速(su)電(dian)(dian)機仍(reng)在(zai)原負載下(xia)工作，輸入電(dian)(dian)流(liu)就(jiu)會超過允許的額定電(dian)(dian)流(liu)，電(dian)(dian)機就(jiu)會過熱，燒壞繞(rao)組(zu)(zu)。

選(xuan)擇不當(dang)，啟(qi)(qi)(qi)動(dong)時(shi)(shi)間長(chang)，很(hen)多機(ji)(ji)(ji)器(qi)飛輪慣量大，啟(qi)(qi)(qi)動(dong)時(shi)(shi)阻力矩大，啟(qi)(qi)(qi)動(dong)時(shi)(shi)間長(chang)，容易燒壞調速電(dian)(dian)機(ji)(ji)(ji)。這些機(ji)(ji)(ji)器(qi)一般采用雙(shuang)籠或深溝(gou)電(dian)(dian)機(ji)(ji)(ji)，起動(dong)電(dian)(dian)流(liu)小(xiao)，起動(dong)轉矩大。選(xuan)擇電(dian)(dian)機(ji)(ji)(ji)時(shi)(shi)，不僅要考(kao)(kao)慮(lv)滿(man)載電(dian)(dian)流(liu)，還要考(kao)(kao)慮(lv)起動(dong)條件。啟(qi)(qi)(qi)動(dong)時(shi)(shi)間長(chang)也是減速電(dian)(dian)機(ji)(ji)(ji)過(guo)載的(de)主要原(yuan)因之(zhi)一。正常情況下，電(dian)(dian)機(ji)(ji)(ji)不允許在熱態下連續啟(qi)(qi)(qi)動(dong)。如果你(ni)需要頻繁啟(qi)(qi)(qi)動(dong)電(dian)(dian)機(ji)(ji)(ji)，你(ni)應該使用合適類(lei)型的(de)電(dian)(dian)機(ji)(ji)(ji)。