高壓電(dian)(dian)(dian)(dian)纜(lan)(lan)頭要密封(feng)起(qi)來，如果(guo)是(shi)(shi)鋸(ju)掉的(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)端頭，不管是(shi)(shi)堆放還(huan)是(shi)(shi)敷設(she)，都是(shi)(shi)要用塑料密封(feng)起(qi)來，這(zhe)樣可以(yi)很好的(de)(de)防止(zhi)潮氣滲入(ru)。正(zheng)常電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)電(dian)(dian)(dian)(dian)場(chang)只有從(cong)（銅）導(dao)線(xian)沿(yan)半徑向(xiang)（銅）屏蔽層(ceng)的(de)(de)電(dian)(dian)(dian)(dian)力線(xian)，沒有芯(xin)線(xian)軸向(xiang)的(de)(de)電(dian)(dian)(dian)(dian)場(chang)（電(dian)(dian)(dian)(dian)力線(xian)），電(dian)(dian)(dian)(dian)場(chang)分布(bu)是(shi)(shi)均勻的(de)(de)。為了(le)提(ti)高高壓電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)柔軟度，以(yi)便于敷設(she)安裝，導(dao)電(dian)(dian)(dian)(dian)線(xian)芯(xin)采取多根單絲絞(jiao)(jiao)(jiao)合而(er)成，從(cong)導(dao)電(dian)(dian)(dian)(dian)線(xian)芯(xin)的(de)(de)絞(jiao)(jiao)(jiao)合形式上，可分為規(gui)則(ze)絞(jiao)(jiao)(jiao)合和非規(gui)則(ze)絞(jiao)(jiao)(jiao)合。

為(wei)(wei)了(le)確保高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)應(ying)力(li)管(guan)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)氣參數達到(dao)上(shang)述標準中(zhong)規定的(de)(de)(de)值，它(ta)可以可靠(kao)地工(gong)作(zuo)。此外，還要(yao)(yao)注意用(yong)硅脂填充電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)絕(jue)緣半(ban)導電(dian)(dian)(dian)(dian)(dian)(dian)層斷裂處(chu)的(de)(de)(de)氣隙，排(pai)除氣體，達到(dao)減少局部(bu)放電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)目的(de)(de)(de)。交(jiao)聯電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)在運行過程中(zhong)由于(yu)內應(ying)力(li)處(chu)理不好會(hui)(hui)產生較大的(de)(de)(de)收縮，所(suo)以在安裝附件時(shi)(shi)，要(yao)(yao)注意應(ying)力(li)管(guan)與絕(jue)緣屏蔽的(de)(de)(de)搭接不小于(yu)20毫米，高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)防止(zhi)收縮時(shi)(shi)應(ying)力(li)管(guan)與絕(jue)緣屏蔽分離。由于(yu)熱(re)收縮附件的(de)(de)(de)彈性(xing)(xing)較低，在運行過程中(zhong)遇熱(re)膨脹、遇冷收縮時(shi)(shi)，界面處(chu)可能會(hui)(hui)出現(xian)氣隙，因(yin)此密封技術對(dui)于(yu)防止(zhi)水分進入至(zhi)關重要(yao)(yao)。電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)現(xian)場修復所(suo)用(yong)的(de)(de)(de)一(yi)些工(gong)具和材料(liao)準備齊(qi)全。高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)絕(jue)緣膠帶、防水膠帶、從塑料(liao)絕(jue)緣和護套上(shang)剝離下來的(de)(de)(de)外皮(pi)等(deng)密封材料(liao)也準備好，因(yin)為(wei)(wei)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)絕(jue)緣護套材料(liao)主要(yao)(yao)分為(wei)(wei)交(jiao)聯聚(ju)乙烯(xi)、聚(ju)乙烯(xi)、聚(ju)等(deng)材料(liao)。由于(yu)銅導體的(de)(de)(de)出色(se)導電(dian)(dian)(dian)(dian)(dian)(dian)性(xing)(xing)能，越(yue)來越(yue)多的(de)(de)(de)工(gong)程采用(yong)銅芯(xin)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)作(zuo)為(wei)(wei)供電(dian)(dian)(dian)(dian)(dian)(dian)系統(tong)的(de)(de)(de)主干道，而(er)鋁芯(xin)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)應(ying)用(yong)則(ze)較少，尤其是在越(yue)高(gao)壓(ya)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)系統(tong)中(zhong)，選擇(ze)銅芯(xin)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)就越(yue)多。

打磨(mo)(mo)及(ji)清(qing)潔絕(jue)緣層。打磨(mo)(mo)時貪圖省事，容易將屏(ping)蔽層中的(de)導電(dian)顆粒帶到絕(jue)緣層中，高(gao)壓電(dian)纜價格，或者絕(jue)緣層表面的(de)突(tu)起沒有(you)完全清(qing)除干(gan)凈，這些可(ke)導致局部放電(dian)，然后(hou)擊穿絕(jue)緣。要(yao)使用(yong)(yong)(yong)由(you)粗到細(xi)不同目(mu)數的(de)砂紙仔(zi)細(xi)打磨(mo)(mo)，現在附(fu)件箱里(li)一(yi)般都只(zhi)提(ti)供一(yi)條砂紙，可(ke)以用(yong)(yong)(yong)正面打磨(mo)(mo)后(hou)用(yong)(yong)(yong)背面再打磨(mo)(mo)一(yi)遍。使用(yong)(yong)(yong)清(qing)潔巾(jin)擦(ca)拭(shi)時要(yao)從絕(jue)緣層到屏(ping)蔽層，決不能(neng)反復(fu)擦(ca)拭(shi)，將黑色導電(dian)顆粒留在絕(jue)緣層上。

熱縮附(fu)(fu)件(jian)里的(de)應(ying)力(li)管。應(ying)力(li)管沒有(you)和金屬屏(ping)蔽層、絕(jue)緣屏(ping)蔽層良(liang)好搭接，不(bu)(bu)能使電應(ying)力(li)均(jun)勻分布，會引發(fa)電纜絕(jue)緣擊穿短路。這一(yi)環(huan)節在附(fu)(fu)件(jian)安(an)裝中(zhong)非常(chang)重(zhong)要(yao)，經常(chang)有(you)電纜由(you)于應(ying)力(li)管搭接不(bu)(bu)良(liang)而燒損，制作時一(yi)定(ding)要(yao)給以足夠重(zhong)視。