橡塑電線電纜廠家除潮的簡易方法

橡塑電纜由(you)于(yu)種(zhong)種(zhong)原因導(dao)致潮(chao)(chao)氣(qi)、水分侵入導(dao)體，降(jiang)低(di)了絕緣(yuan)強度，會造成漏電或(huo)短(duan)路(lu)事故，嚴重威脅人身(shen)安全和影響生產。對于(yu)有潮(chao)(chao)氣(qi)、水分侵入導(dao)體的橡塑電纜，為保證其具有良好的絕緣(yuan)性能，需要進行(xing)除(chu)潮(chao)(chao)處(chu)理。

電流干燥法：

電(dian)流干(gan)燥法(fa)就是將需(xu)要除(chu)潮的電(dian)纜(lan)（絕緣電(dian)阻偏低而(er)(er)無明顯的水(shui)跡時），通(tong)過一定的電(dian)流使其(qi)發熱，而(er)(er)將電(dian)纜(lan)內(nei)部的潮氣、水(shui)分蒸發掉，其(qi)處(chu)理(li)步(bu)驟如下(xia)。

（1）對(dui)受潮電(dian)纜(lan)進(jin)行外觀檢查及絕(jue)緣電(dian)阻(zu)的測量(liang)。在干(gan)燥(zao)(zao)前對(dui)受潮電(dian)纜(lan)進(jin)行檢查和絕(jue)緣電(dian)阻(zu)測量(liang)。當絕(jue)緣電(dian)阻(zu)低于規定(ding)值時，應詳細做好記錄(lu)。假(jia)如有(you)短路接地故(gu)(gu)障(zhang)，要查出故(gu)(gu)障(zhang)點，再(zai)排除故(gu)(gu)障(zhang)后再(zai)進(jin)行干(gan)燥(zao)(zao)處(chu)理。

（2）電(dian)(dian)流(liu)(liu)(liu)干燥法的(de)接線。對于三相(xiang)三（四）線電(dian)(dian)纜，在電(dian)(dian)纜的(de)一端短(duan)路(lu)，在另一端將導體分成兩組(zu)，一組(zu)為(wei)1（2）根線芯，另一組(zu)為(wei)2根線芯，分別短(duan)路(lu)后接入升流(liu)(liu)(liu)器或(huo)電(dian)(dian)焊機的(de)出線上，并(bing)在回(hui)路(lu)中安(an)裝一塊電(dian)(dian)流(liu)(liu)(liu)表(biao)（電(dian)(dian)流(liu)(liu)(liu)表(biao)量程不夠時(shi)，可采用(yong)電(dian)(dian)流(liu)(liu)(liu)互(hu)感器測之(zhi)），用(yong)于回(hui)路(lu)的(de)電(dian)(dian)流(liu)(liu)(liu)監視。

最初通過(guo)電(dian)(dian)(dian)(dian)流(liu)時(shi)，其電(dian)(dian)(dian)(dian)流(liu)控(kong)制在(zai)電(dian)(dian)(dian)(dian)纜(lan)長期(qi)允許工作(zuo)電(dian)(dian)(dian)(dian)流(liu)的1.15倍以下，并要(yao)嚴(yan)格用遠紅外線測(ce)溫(wen)(wen)儀（或溫(wen)(wen)度(du)(du)(du)計）對(dui)電(dian)(dian)(dian)(dian)纜(lan)線芯和電(dian)(dian)(dian)(dian)纜(lan)表(biao)面進(jin)行溫(wen)(wen)度(du)(du)(du)監視(shi)。當溫(wen)(wen)度(du)(du)(du)達到55℃時(shi)，減小電(dian)(dian)(dian)(dian)流(liu)，并控(kong)制在(zai)1.0倍長期(qi)允許工作(zuo)電(dian)(dian)(dian)(dian)流(liu)的數值(zhi)內(nei)。這樣干燥5～6h，再對(dui)電(dian)(dian)(dian)(dian)纜(lan)進(jin)行絕緣電(dian)(dian)(dian)(dian)阻測(ce)試(shi)。絕緣電(dian)(dian)(dian)(dian)阻不能滿(man)足要(yao)求時(shi)，繼續干燥，直到絕緣電(dian)(dian)(dian)(dian)阻滿(man)足要(yao)求時(shi)，再對(dui)電(dian)(dian)(dian)(dian)纜(lan)進(jin)行其他電(dian)(dian)(dian)(dian)氣指(zhi)標測(ce)定(ding)。 需要(yao)指(zhi)出(chu)的是，在(zai)整個干燥過(guo)程中，要(yao)嚴(yan)格監視(shi)電(dian)(dian)(dian)(dian)纜(lan)導體和電(dian)(dian)(dian)(dian)纜(lan)表(biao)皮的溫(wen)(wen)度(du)(du)(du)，不能超過(guo)表(biao)1內(nei)溫(wen)(wen)度(du)(du)(du)數值(zhi)。另(ling)外，接頭(tou)部(bu)分必須接牢，否(fou)則會造成接頭(tou)部(bu)位過(guo)熱(re)，容易引起溫(wen)(wen)度(du)(du)(du)監視(shi)出(chu)現誤導而使效果不佳的情況(kuang)。