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       長壽命電解電容的用(yong)途非常廣泛，一般(ban)(ban)可用(yong)于電(dian)動(dong)機啟動(dong)、鎮流器(qi)、變頻器(qi)等。電(dian)解(jie)(jie)電(dian)容常見的故障有，容量(liang)減少，容量(liang)消失(shi)、擊穿短路及漏電(dian)，其(qi)中容量(liang)變化是因電(dian)解(jie)(jie)電(dian)容在使用(yong)或放(fang)置過(guo)程中其(qi)內部的電(dian)解(jie)(jie)液逐(zhu)漸干涸引(yin)起，而擊穿與漏電(dian)一般(ban)(ban)為(wei)所加的電(dian)壓過(guo)高或本身(shen)質量(liang)不(bu)佳引(yin)起。

       判斷電(dian)(dian)(dian)(dian)源長壽命電(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)容(rong)(rong)的(de)好壞(huai)一般(ban)采用(yong)萬(wan)用(yong)表(biao)(biao)(biao)的(de)電(dian)(dian)(dian)(dian)阻(zu)檔進行測量。具(ju)體方(fang)法為：將(jiang)電(dian)(dian)(dian)(dian)容(rong)(rong)兩管(guan)腳(jiao)短路進行放電(dian)(dian)(dian)(dian)，用(yong)萬(wan)用(yong)表(biao)(biao)(biao)的(de)黑表(biao)(biao)(biao)筆接電(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)容(rong)(rong)的(de)正極。紅表(biao)(biao)(biao)筆接負(fu)極(對指(zhi)針(zhen)式(shi)萬(wan)用(yong)表(biao)(biao)(biao)，用(yong)數字式(shi)萬(wan)用(yong)表(biao)(biao)(biao)測量時(shi)表(biao)(biao)(biao)筆互調)，正常時(shi)表(biao)(biao)(biao)針(zhen)應(ying)先向(xiang)電(dian)(dian)(dian)(dian)阻(zu)小的(de)方(fang)向(xiang)擺動，然后逐漸返回直至無窮大(da)處。

       表針的擺動(dong)幅度越(yue)(yue)大或返回的速度越(yue)(yue)慢，說(shuo)明(ming)電(dian)(dian)容的容量越(yue)(yue)大，反之(zhi)則說(shuo)明(ming)電(dian)(dian)容的容量越(yue)(yue)小。如(ru)表針指(zhi)在中間某處不再變化，說(shuo)明(ming)此電(dian)(dian)容漏電(dian)(dian)，如(ru)電(dian)(dian)阻(zu)指(zhi)示(shi)值很(hen)小或為(wei)零，則表明(ming)此電(dian)(dian)容已擊穿短路。

       因萬用表(biao)使用的電(dian)池電(dian)壓一般很低，所以在測量低耐壓的電(dian)容時比較(jiao)準確，而當(dang)電(dian)容的耐壓較(jiao)高時，打時盡管測量正(zheng)常，但加上高壓時則(ze)有可能發生漏電(dian)或擊穿現(xian)象。