交流輸電線(xian)(xian)(xian)(xian)(xian)路的電暈損(sun)失主要(yao)(yao)與(yu)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表(biao)面(mian)場 強和(he)(he)天氣(qi)有關(guan)，根據絕(jue)緣水平(ping)要(yao)(yao)求(qiu)確定了相(xiang)間距(ju)(ju)離 后(hou)，導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表(biao)面(mian)場強主要(yao)(yao)與(yu)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)分(fen)裂數、分(fen)裂間距(ju)(ju)和(he)(he) 子(zi)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)直徑(jing)有關(guan)，分(fen)裂數越多，子(zi)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)直徑(jing)越大(da)， 表(biao)面(mian)場強越小(xiao)。擴徑(jing)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)通過支撐(cheng)鋁線(xian)(xian)(xian)(xian)(xian)疏繞(rao)的方式(shi) 擴大(da)了導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)外徑(jing)，這樣可減小(xiao)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表(biao)面(mian)的電場強度(du)和(he)(he)電暈放電，降低噪(zao)聲，減少對無線(xian)(xian)(xian)(xian)(xian)電的干擾。相(xiang) 對于常規導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)，擴徑(jing)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)重量(liang)較輕，安裝敷設(she)后(hou)的 塑蠕伸長減小(xiao)，導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)永久變形減少，在(zai)滿足輸送(song)容 量(liang)要(yao)(yao)求(qiu)和(he)(he)環(huan)境保護指標的前(qian)提(ti)下，可大(da)幅降低線(xian)(xian)(xian)(xian)(xian)路 整體造價。簡單(dan)說(shuo)來(lai)，擴徑(jing)導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)是從常規導(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)中抽(chou)取數股(gu) 鋁線(xian)(xian)(xian)(xian)(xian)后(hou)繞(rao)制而成的。

    分(fen)裂導線(xian)(xian)是由三(san)根或四(si)根單芯(xin)導線(xian)(xian)經(jing)過某種(zhong)工(gong)藝制造在(zai)一(yi)起的(de)(de)一(yi)種(zhong)可分(fen)裂的(de)(de)導線(xian)(xian)，或者稱導線(xian)(xian)束， 這種(zhong)分(fen)裂導線(xian)(xian)不(bu)僅(jin)僅(jin)是形式上與(yu)常規導線(xian)(xian)不(bu)同，由于分(fen)裂導線(xian)(xian)可使導線(xian)(xian)周(zhou)(zhou)圍(wei)磁場分(fen)布改(gai)(gai)變，從而等效地增大(da)了導線(xian)(xian)半徑，減小了導線(xian)(xian)電(dian)抗；同時也改(gai)(gai)變了導線(xian)(xian)周(zhou)(zhou)圍(wei)的(de)(de)電(dian)場分(fen)布， 使導線(xian)(xian)的(de)(de)電(dian)納(na)也相應增大(da)。