高壓開關柜常見故障表現形式主要有正在運行設備突然跳閘和電動手動不能分合閘。高壓開關柜常見故障類型可分為電氣故障和機械故障兩類。電氣故障可以分為電動不能儲能、電動不能合閘、電動不能分閘等。 
一、高壓(ya)開關柜在(zai)運行中突然跳閘故障(zhang)的判斷和(he)處理 

（1）故障現象(xiang)：這種(zhong)故障原因是保(bao)護(hu)動作。高壓柜上裝有過流、速斷(duan)、瓦斯和(he)溫度(du)等保(bao)護(hu)。

（2）判(pan)斷(duan)(duan)方法：判(pan)斷(duan)(duan)故(gu)障原(yuan)因可(ke)以根據繼(ji)電(dian)器(qi)掉(diao)牌(pai)、遙信信息等(deng)情況進行判(pan)斷(duan)(duan)。在(zai)高壓柜中(zhong)瓦斯、溫度保護動(dong)(dong)作后都有相應的信號(hao)繼(ji)電(dian)器(qi)掉(diao)牌(pai)指示。過(guo)流繼(ji)電(dian)器(qi)(GL型(xing)(xing))動(dong)(dong)作時不能區分過(guo)流和速斷(duan)(duan)。在(zai)定時限保護電(dian)路中(zhong)過(guo)流和速斷(duan)(duan)分別由兩塊(JL型(xing)(xing))電(dian)流繼(ji)電(dian)器(qi)保護。繼(ji)電(dian)器(qi)動(dong)(dong)作時紅色(se)的發(fa)光二極管(guan)亮，可(ke)以明確判(pan)斷(duan)(duan)動(dong)(dong)作原(yuan)因。 3)處理方法:過(guo)流(liu)繼電(dian)器(qi)(qi)(qi)(qi)動(dong)作使開(kai)關跳(tiao)閘，是因(yin)為(wei)線路(lu)(lu)過(guo)負荷。在(zai)送(song)電(dian)前(qian)應當(dang)與用(yong)(yong)戶協商減少(shao)負荷防止(zhi)送(song)電(dian)后再次跳(tiao)閘。速斷跳(tiao)閘時，應當(dang)檢(jian)查母線、變(bian)(bian)壓器(qi)(qi)(qi)(qi)、線路(lu)(lu)。找到短路(lu)(lu)故障點(dian)，將故障排(pai)除后方可(ke)(ke)送(song)電(dian)。過(guo)流(liu)和速斷保護(hu)動(dong)作使開(kai)關跳(tiao)閘后繼電(dian)器(qi)(qi)(qi)(qi)可(ke)(ke)以(yi)復位，利用(yong)(yong)這(zhe)一特點(dian)可(ke)(ke)以(yi)和溫(wen)度(du)、瓦(wa)斯(si)保護(hu)區分。變(bian)(bian)壓器(qi)(qi)(qi)(qi)發(fa)生內部(bu)故障或過(guo)負荷時瓦(wa)斯(si)和溫(wen)度(du)保護(hu)動(dong)作。如(ru)果是變(bian)(bian)壓器(qi)(qi)(qi)(qi)內部(bu)故障使重(zhong)瓦(wa)斯(si)動(dong)作，必須(xu)檢(jian)修變(bian)(bian)壓器(qi)(qi)(qi)(qi)。如(ru)果是新移動(dong)、加油的變(bian)(bian)壓器(qi)(qi)(qi)(qi)發(fa)生輕瓦(wa)斯(si)動(dong)作，可(ke)(ke)以(yi)將內部(bu)氣體放(fang)出后繼續投入運行(xing)。溫(wen)度(du)保護(hu)動(dong)作是因(yin)為(wei)變(bian)(bian)壓器(qi)(qi)(qi)(qi)溫(wen)度(du)超過(guo)整定(ding)值(zhi)(zhi)(zhi)。如(ru)果定(ding)值(zhi)(zhi)(zhi)整定(ding)正(zheng)確(que)，必須(xu)設法降低(di)變(bian)(bian)壓器(qi)(qi)(qi)(qi)的溫(wen)度(du)。可(ke)(ke)以(yi)通(tong)風降低(di)環境溫(wen)度(du)，也(ye)可(ke)(ke)以(yi)減少(shao)負荷減低(di)變(bian)(bian)壓器(qi)(qi)(qi)(qi)溫(wen)升。如(ru)果整定(ding)值(zhi)(zhi)(zhi)偏小，可(ke)(ke)以(yi)將整定(ding)值(zhi)(zhi)(zhi)調(diao)大。通(tong)過(guo)以(yi)上幾個方法使溫(wen)度(du)接(jie)點(dian)打開(kai)，開(kai)關才能送(song)電(dian)。

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