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     長壽命電解電容的(de)用(yong)途非常(chang)廣泛，一般(ban)可(ke)用(yong)于電(dian)(dian)(dian)動機啟動、鎮流器(qi)、變頻器(qi)等(deng)。電(dian)(dian)(dian)解電(dian)(dian)(dian)容常(chang)見的(de)故障有，容量(liang)減(jian)少，容量(liang)消(xiao)失、擊穿短路及漏電(dian)(dian)(dian)，其(qi)中(zhong)容量(liang)變化是因電(dian)(dian)(dian)解電(dian)(dian)(dian)容在使用(yong)或放置過程(cheng)中(zhong)其(qi)內部(bu)的(de)電(dian)(dian)(dian)解液逐漸干涸(he)引起，而擊穿與漏電(dian)(dian)(dian)一般(ban)為所加的(de)電(dian)(dian)(dian)壓過高或本身質量(liang)不(bu)佳引起。

     判(pan)斷電(dian)(dian)(dian)(dian)源(yuan)長(chang)壽命電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)的好壞(huai)一(yi)般采用萬用表(biao)(biao)(biao)的電(dian)(dian)(dian)(dian)阻檔進行測量(liang)。具體方(fang)法為：將電(dian)(dian)(dian)(dian)容(rong)兩管腳短路(lu)進行放電(dian)(dian)(dian)(dian)，用萬用表(biao)(biao)(biao)的黑表(biao)(biao)(biao)筆(bi)接電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)的正極。紅表(biao)(biao)(biao)筆(bi)接負極(對(dui)指針(zhen)式(shi)(shi)萬用表(biao)(biao)(biao)，用數字式(shi)(shi)萬用表(biao)(biao)(biao)測量(liang)時表(biao)(biao)(biao)筆(bi)互(hu)調)，正常時表(biao)(biao)(biao)針(zhen)應先向(xiang)電(dian)(dian)(dian)(dian)阻小的方(fang)向(xiang)擺動，然后逐漸(jian)返(fan)回直至(zhi)無窮大處。

     表(biao)針(zhen)的擺動幅度越(yue)大或(huo)返回的速度越(yue)慢，說明電(dian)(dian)容(rong)的容(rong)量(liang)越(yue)大，反之則說明電(dian)(dian)容(rong)的容(rong)量(liang)越(yue)小(xiao)。如表(biao)針(zhen)指(zhi)在中(zhong)間某處不(bu)再(zai)變化，說明此電(dian)(dian)容(rong)漏(lou)電(dian)(dian)，如電(dian)(dian)阻指(zhi)示值(zhi)很小(xiao)或(huo)為零，則表(biao)明此電(dian)(dian)容(rong)已擊穿(chuan)短路。

     因萬用(yong)表使用(yong)的電(dian)池電(dian)壓(ya)一般很低，所以(yi)在測量(liang)低耐(nai)壓(ya)的電(dian)容時(shi)比較準確，而當電(dian)容的耐(nai)壓(ya)較高時(shi)，打(da)時(shi)盡管測量(liang)正常，但加上高壓(ya)時(shi)則有可(ke)能(neng)發生漏電(dian)或擊穿現象。