擴徑(jing)導(dao)線(xian)是以滿足(zu)技術(shu)條件的(de)常規導(dao)線(xian)規格為基準,采取擴大(da)導(dao)線(xian)外(wai)徑(jing)技術(shu),在保(bao)證電(dian)暈所要求的(de)導(dao)線(xian)外(wai)徑(jing)前提下,減少(shao)導(dao)線(xian)的(de)鋁截面,從而(er)減少(shao)導(dao)線(xian)的(de)總(zong)重量(liang),減少(shao)鐵塔荷載和結構(gou)重量(liang),極大(da)地降(jiang)低(di)線(xian)路造(zao)價。當線(xian)路的(de)電(dian)壓超過(guo)220kv時,為了降(jiang)低(di)線(xian)路電(dian)抗和電(dian)暈損...