潛水泵運行幾(ji)分鐘(zhong)就跳閘(zha)，有幾(ji)分鐘(zhong)的間隔說(shuo)明(ming)不是短路，如果短路的話，水泵送(song)電(dian)空開馬上就會動作跳閘(zha)。而是由于負載(zai)過(guo)大導致的運行電(dian)流超過(guo)空開的額定電(dian)流而動作跳閘(zha)。造(zao)成(cheng)這(zhe)種情況(kuang)的原(yuan)因主要有兩(liang)方面：

1、機械原因：水(shui)(shui)泵(beng)管路(lu)堵(du)塞(sai)或(huo)管路(lu)變徑過細；管線過長揚程不(bu)足(zu)；吸水(shui)(shui)葉(xie)輪(lun)有異物卡阻；軸承缺油或(huo)損(sun)壞(huai)。

2、電(dian)(dian)氣原因：電(dian)(dian)纜接線端子螺絲松動；電(dian)(dian)纜線徑過細或封閉不好透水漏(lou)電(dian)(dian)；空開選擇過小(xiao)。

排除故障：

1、將(jiang)水泵從管(guan)路脫離開，放到沒(mei)有水的地方，通電(dian)(dian)測試幾(ji)分(fen)鐘，在跳閘之前先(xian)手動斷電(dian)(dian)，用(yong)手觸摸一下電(dian)(dian)纜和水泵泵體的溫(wen)度，溫(wen)度過高則說明故障沒(mei)有排除。反之則是管(guan)路堵塞，如果是新安裝的水泵，可能是管(guan)徑改變過細或揚程不足所致(zhi)。

2、用(yong)低(di)壓搖表(biao)帶電(dian)(dian)(dian)(dian)纜測(ce)試水泵電(dian)(dian)(dian)(dian)機絕緣(yuan)(yuan)情況(kuang)，低(di)于(yu)0.5兆歐，說明線路或電(dian)(dian)(dian)(dian)機絕緣(yuan)(yuan)不夠。再將電(dian)(dian)(dian)(dian)纜拆除，單獨測(ce)試電(dian)(dian)(dian)(dian)機絕緣(yuan)(yuan)情況(kuang)，高于(yu)或等(deng)于(yu)0.5兆歐，說明是(shi)負荷(he)電(dian)(dian)(dian)(dian)纜漏電(dian)(dian)(dian)(dian)，反之則是(shi)水泵密封不嚴出現電(dian)(dian)(dian)(dian)機內部(bu)滲水。

3、摘下水(shui)泵網篩，用鉗子或其它工具轉(zhuan)動一下水(shui)泵軸(zhou)(zhou)，如(ru)能(neng)輕松轉(zhuan)動，說(shuo)明軸(zhou)(zhou)承(cheng)沒事，轉(zhuan)動費(fei)力說(shuo)明泵體(ti)銹蝕嚴重(zhong)、有異物卡阻或軸(zhou)(zhou)承(cheng)損壞。