擴徑導(dao)線(xian)(xian)(xian)是以滿足技(ji)術(shu)條件的(de)常規(gui)導(dao)線(xian)(xian)(xian)規(gui)格為基準，采取擴大(da)導(dao)線(xian)(xian)(xian)外(wai)(wai)徑技(ji)術(shu)，在保證電暈所要求(qiu)的(de)導(dao)線(xian)(xian)(xian)外(wai)(wai)徑前提下，減(jian)少(shao)導(dao)線(xian)(xian)(xian)的(de)鋁截面，從(cong)而減(jian)少(shao)導(dao)線(xian)(xian)(xian)的(de)總重(zhong)量(liang)，減(jian)少(shao)鐵(tie)塔(ta)荷載和結構重(zhong)量(liang)，極大(da)地降低線(xian)(xian)(xian)路造價。

擴徑(jing)導線(xian)的產(chan)品用(yong)途：本產(chan)品適用(yong)于高低壓輸電(dian)線(xian)中電(dian)廠及(ji)變電(dian)站(zhan)配電(dian)線(xian)路(lu)、母(mu)線(xian)等(deng)。減少電(dian)暈損失，節約有色金屬(shu)。

擴(kuo)徑導線(xian)的(de)性(xing)能特點:線(xian)膨脹系數較好(hao)(hao)，電(dian)暈損失小，有良好(hao)(hao)的(de)散熱性(xing)。

擴(kuo)徑導線(xian)(xian)在超(chao)高(gao)(gao)(gao)壓(ya)和特高(gao)(gao)(gao)壓(ya)輸電(dian)工(gong)程中(zhong)有很大的(de)(de)應用(yong)空間，尤(you)其在高(gao)(gao)(gao)海拔地(di)區(qu)有著更為廣(guang)闊(kuo)的(de)(de)前景。擴(kuo)徑鋼芯鋁絞(jiao)線(xian)(xian)LGKK適用(yong)于(yu)高(gao)(gao)(gao)低壓(ya)輸電(dian)線(xian)(xian)中(zhong)電(dian)廠(chang)及變電(dian)站(zhan)配電(dian)線(xian)(xian)路(lu)。

當(dang)線(xian)(xian)路的電(dian)壓超過220kv時(shi)，為了降(jiang)低線(xian)(xian)路電(dian)抗和電(dian)暈(yun)損(sun)耗，通(tong)常(chang)采用擴徑(jing)導線(xian)(xian)。擴徑(jing)導線(xian)(xian)就是(shi)把普通(tong)的導線(xian)(xian)做成中空（里面用多(duo)股鋼芯線(xian)(xian)和支撐(cheng)層(ceng)做成）或者減(jian)少其中部分層(ceng)單線(xian)(xian)數(shu)量（使(shi)該層(ceng)單線(xian)(xian)間(jian)存(cun)在一定數(shu)量空隙），最終達到增加導線(xian)(xian)的等效(xiao)半(ban)徑(jing)的目(mu)的。