電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)(de)作(zuo)用(yong)(yong)是(shi)(shi)什么?應注意什么?首先(xian)我們(men)對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)肯定都不陌生了。也(ye)知(zhi)道一(yi)般在(zai)什么場合(he)會使用(yong)(yong)到(dao)。所以(yi)對(dui)于作(zuo)用(yong)(yong)大致上我們(men)都了解(jie)。但實(shi)質(zhi)意義(yi)(yi)呢?他的(de)(de)(de)(de)作(zuo)用(yong)(yong)，耐(nai)火電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)，是(shi)(shi)能傳輸供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)到(dao)各家(jia)或各個工業，只要用(yong)(yong)到(dao)照明的(de)(de)(de)(de)地(di)方(fang)，都要用(yong)(yong)到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)用(yong)(yong)以(yi)傳輸電(dian)(dian)(dian)(dian)(dian)(dian)(dian)（磁(ci)）能，信息和實(shi)現電(dian)(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)能轉換(huan)的(de)(de)(de)(de)線(xian)(xian)(xian)材產(chan)品(pin)．廣義(yi)(yi)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)亦簡稱(cheng)為電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)．狹義(yi)(yi)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)是(shi)(shi)指絕緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)．它可定義(yi)(yi)為：由下列部分組成(cheng)的(de)(de)(de)(de)集合(he)體：一(yi)根(gen)或多根(gen)絕緣線(xian)(xian)(xian)芯(xin)，以(yi)及它們(men)各自可能具有(you)的(de)(de)(de)(de)包覆層(ceng)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)多少錢，總保護(hu)層(ceng)及外護(hu)層(ceng)．電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)亦可有(you)附加的(de)(de)(de)(de)沒有(you)絕緣的(de)(de)(de)(de)導體。

中(zhong)高(gao)(gao)壓電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)芯(xin)(xin)數(shu)的(de)選(xuan)(xuan)擇對(dui)(dui)于3~35kV三相(xiang)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)回(hui)(hui)(hui)路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)芯(xin)(xin)數(shu)的(de)選(xuan)(xuan)擇。當工作電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)較大的(de)回(hui)(hui)(hui)路(lu)(lu)或(huo)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)敷設(she)于水(shui)下時(shi)，每回(hui)(hui)(hui)路(lu)(lu)可(ke)選(xuan)(xuan)用(yong)(yong)(yong)3根(gen)單(dan)芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)；除(chu)上述(shu)情況外，應(ying)選(xuan)(xuan)用(yong)(yong)(yong)3芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)，3芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)可(ke)選(xuan)(xuan)用(yong)(yong)(yong)普(pu)通(tong)統包型，也可(ke)選(xuan)(xuan)用(yong)(yong)(yong)3根(gen)單(dan)芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)絞合構造型。對(dui)(dui)110kV三相(xiang)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)回(hui)(hui)(hui)路(lu)(lu)，安徽(hui)電(dian)(dian)(dian)(dian)(dian)線，除(chu)敷設(she)于湖、海水(shui)下等(deng)(deng)場所且電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)截(jie)面不大時(shi)可(ke)選(xuan)(xuan)用(yong)(yong)(yong)3芯(xin)(xin)外，每回(hui)(hui)(hui)路(lu)(lu)可(ke)選(xuan)(xuan)用(yong)(yong)(yong)3根(gen)單(dan)芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)。對(dui)(dui)110kV以上三相(xiang)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)回(hui)(hui)(hui)路(lu)(lu)，每回(hui)(hui)(hui)路(lu)(lu)應(ying)選(xuan)(xuan)用(yong)(yong)(yong)3根(gen)單(dan)芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)。電(dian)(dian)(dian)(dian)(dian)氣(qi)化鐵路(lu)(lu)等(deng)(deng)高(gao)(gao)壓交流(liu)(liu)單(dan)相(xiang)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)回(hui)(hui)(hui)路(lu)(lu)，應(ying)選(xuan)(xuan)用(yong)(yong)(yong)2芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)或(huo)每回(hui)(hui)(hui)選(xuan)(xuan)用(yong)(yong)(yong)2根(gen)單(dan)芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)。高(gao)(gao)壓直流(liu)(liu)輸電(dian)(dian)(dian)(dian)(dian)系統，宜選(xuan)(xuan)用(yong)(yong)(yong)單(dan)芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)；在(zai)湖、海等(deng)(deng)水(shui)下敷設(she)時(shi)，也可(ke)選(xuan)(xuan)用(yong)(yong)(yong)同軸型2芯(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)。

三(san)稱重(zhong)量(liang)(liang)。質(zhi)(zhi)量(liang)(liang)好的(de)(de)電(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)纜，一般每100m重(zhong)量(liang)(liang)都在(zai)規定的(de)(de)重(zhong)量(liang)(liang)范圍(wei)內(nei)。質(zhi)(zhi)量(liang)(liang)差(cha)的(de)(de)電(dian)(dian)(dian)線(xian)(xian)重(zhong)量(liang)(liang)不(bu)足，要(yao)么長度不(bu)夠，要(yao)么電(dian)(dian)(dian)線(xian)(xian)銅(tong)芯(xin)(xin)雜質(zhi)(zhi)過多。四比價(jia)格。購買時(shi)，要(yao)當(dang)心，別(bie)為(wei)商家標榜(bang)的(de)(de)''沖昏了頭腦，電(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)纜制造廠家，終上(shang)當(dang)受騙(pian)。五看銅(tong)質(zhi)(zhi)。合格的(de)(de)銅(tong)芯(xin)(xin)電(dian)(dian)(dian)線(xian)(xian)銅(tong)芯(xin)(xin)應該是(shi)紫(zi)紅色、有光澤、手感軟。而(er)(er)的(de)(de)銅(tong)芯(xin)(xin)線(xian)(xian)銅(tong)芯(xin)(xin)為(wei)紫(zi)黑色、偏黃(huang)或(huo)偏白(bai)，雜質(zhi)(zhi)多，機械強(qiang)度差(cha)，韌性不(bu)佳，稍用力(li)即會折斷，而(er)(er)且電(dian)(dian)(dian)線(xian)(xian)內(nei)常有斷線(xian)(xian)現象。