高壓電(dian)(dian)纜(lan)(lan)在(zai)電(dian)(dian)力(li)(li)系(xi)統使(shi)用(yong)的電(dian)(dian)線電(dian)(dian)纜(lan)(lan)產品主要包括架(jia)空(kong)(kong)(kong)裸線、母線(母線)、電(dian)(dian)力(li)(li)電(dian)(dian)纜(lan)(lan)(塑料(liao)電(dian)(dian)纜(lan)(lan)、油紙電(dian)(dian)纜(lan)(lan)(基本以塑料(liao)電(dian)(dian)力(li)(li)電(dian)(dian)纜(lan)(lan)替(ti)代)、橡套電(dian)(dian)纜(lan)(lan)、架(jia)空(kong)(kong)(kong)絕緣電(dian)(dian)纜(lan)(lan))、分(fen)支(zhi)電(dian)(dian)纜(lan)(lan)(替(ti)代部分(fen)母線)、電(dian)(dian)磁(ci)線及電(dian)(dian)力(li)(li)設(she)備(bei)用(yong)電(dian)(dian)氣設(she)備(bei)電(dian)(dian)線電(dian)(dian)纜(lan)(lan)等。信息傳輸系(xi)統中使(shi)用(yong)的電(dian)(dian)線電(dian)(dian)纜(lan)(lan)主要包括市話電(dian)(dian)纜(lan)(lan)、電(dian)(dian)視電(dian)(dian)纜(lan)(lan)、電(dian)(dian)子(zi)電(dian)(dian)纜(lan)(lan)、射頻電(dian)(dian)纜(lan)(lan)、光纖電(dian)(dian)纜(lan)(lan)、數(shu)據電(dian)(dian)纜(lan)(lan)、電(dian)(dian)磁(ci)電(dian)(dian)纜(lan)(lan)、電(dian)(dian)力(li)(li)通信或其他復(fu)合電(dian)(dian)纜(lan)(lan)等。機械設(she)備(bei)和儀表(biao)系(xi)統除架(jia)空(kong)(kong)(kong)裸線外(wai)全部使(shi)用(yong)，主要是電(dian)(dian)力(li)(li)電(dian)(dian)纜(lan)(lan)、電(dian)(dian)磁(ci)線、數(shu)據電(dian)(dian)纜(lan)(lan)、儀表(biao)電(dian)(dian)纜(lan)(lan)等。

    電(dian)纜(lan)導體電(dian)阻不符合懇(ken)求，電(dian)纜(lan)在工(gong)作(zuo)中發熱(re)。電(dian)纜(lan)選型不當(dang)，構成運(yun)用(yong)的電(dian)纜(lan)導體截面過(guo)小，工(gong)作(zuo)中出現過(guo)載現象，臨時運(yun)用(yong)后(hou)，電(dian)纜(lan)發熱(re)和散(san)熱(re)不平衡構成發熱(re)現象。電(dian)纜(lan)裝(zhuang)置放置過(guo)多，通(tong)風散(san)熱(re)作(zuo)用(yong)不足(zu)，電(dian)纜(lan)接近其他熱(re)源，影響電(dian)纜(lan)的正常(chang)散(san)熱(re)，電(dian)纜(lan)在工(gong)作(zuo)中可能發熱(re)。

   連接器的(de)(de)制造技術不足，連接不嚴(yan)密，連接器的(de)(de)接觸電(dian)阻過(guo)大，電(dian)纜(lan)(lan)(lan)也會(hui)發熱(re)。電(dian)纜(lan)(lan)(lan)之(zhi)間的(de)(de)絕緣(yuan)功能不好，絕緣(yuan)電(dian)阻小，工(gong)作(zuo)(zuo)中也會(hui)發熱(re)。電(dian)纜(lan)(lan)(lan)部(bu)分(fen)護套損壞(huai)，進水(shui)后(hou)對(dui)絕緣(yuan)功能構成遲(chi)緩的(de)(de)破(po)壞(huai)作(zuo)(zuo)用，構成絕緣(yuan)阻力逐漸下降，電(dian)纜(lan)(lan)(lan)工(gong)作(zuo)(zuo)中也會(hui)發生發熱(re)現象(xiang)。

   電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)發(fa)熱后，如(ru)果(guo)找不到要(yao)素，立即清除缺(que)點，電(dian)(dian)(dian)纜(lan)連接通電(dian)(dian)(dian)后絕緣熱破壞。電(dian)(dian)(dian)纜(lan)之間發(fa)生短路跳(tiao)閘(zha)現(xian)象(xiang)，嚴重可能引(yin)起火災。電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)經(jing)過肯定(ding)的(de)(de)負(fu)負(fu)載電(dian)(dian)(dian)流時，它肯定(ding)會發(fa)熱。隨(sui)著負(fu)載電(dian)(dian)(dian)流的(de)(de)增加，電(dian)(dian)(dian)纜(lan)表面的(de)(de)溫(wen)度(du)(du)越(yue)高。如(ru)果(guo)不及(ji)時處理，可以(yi)想象(xiang)后果(guo)。例如(ru)，聚氯乙烯電(dian)(dian)(dian)纜(lan)以(yi)線芯溫(wen)度(du)(du)為70度(du)(du)為下限，表面溫(wen)度(du)(du)為5~10度(du)(du)。因(yin)此，電(dian)(dian)(dian)纜(lan)表面的(de)(de)溫(wen)度(du)(du)在60度(du)(du)以(yi)下是安全(quan)的(de)(de)，從電(dian)(dian)(dian)源保護(hu)來看，溫(wen)度(du)(du)越(yue)低越(yue)好。