耐(nai)(nai)熱(re)鋁(lv)合金(jin)鋼(gang)芯(xin)導(dao)線是以鋁(lv)包鋼(gang)芯(xin)作為(wei)(wei)加(jia)強(qiang)線，以耐(nai)(nai)熱(re)鋁(lv)合金(jin)做為(wei)(wei)載(zai)流體(ti)的(de)(de)復合導(dao)線，是一種新(xin)型的(de)(de)節能導(dao)線。加(jia)強(qiang)芯(xin)由(you)鋁(lv)包鋼(gang)芯(xin)代替(ti)了(le)傳統的(de)(de)鋼(gang)芯(xin)，減(jian)小了(le)其(qi)化學(xue)腐蝕，增加(jia)了(le)其(qi)使用壽命壽命;外層采用耐(nai)(nai)熱(re)鋁(lv)合金(jin)材料，工作溫度不僅達到(dao) 150℃以上，其(qi)導(dao)電率提高到(dao)60%IACS，大(da)(da)大(da)(da)提高了(le)導(dao)線的(de)(de)運載(zai)能力。

當(dang)線(xian)路(lu)的(de)(de)電(dian)(dian)壓超過220kv時，為了降低線(xian)路(lu)電(dian)(dian)抗和電(dian)(dian)暈損耗，通常采用擴徑(jing)(jing)(jing)導線(xian)。擴徑(jing)(jing)(jing)導線(xian)就是把普通的(de)(de)導線(xian)做成中空(kong)(kong)（里面(mian)用多股芯線(xian)和支(zhi)撐層(ceng)(ceng)做成）或者減少其中部分層(ceng)(ceng)單(dan)線(xian)數量(liang)（使該層(ceng)(ceng)單(dan)線(xian)間存在一定數量(liang)空(kong)(kong)隙(xi)），最終(zhong)達到增(zeng)加導線(xian)的(de)(de)等效半徑(jing)(jing)(jing)的(de)(de)目的(de)(de)。

與(yu)(yu)傳統(tong)的(de)(de)(de)(de)鋼芯鋁絞線(xian)(xian)相(xiang)比，鋁包鋼芯耐(nai)(nai)熱(re)鋁合金(jin)(jin) 導線(xian)(xian)具有使用溫度(du)高(gao)、耐(nai)(nai)熱(re)性(xing)能(neng)(neng)好、載(zai)流量(liang)大、耐(nai)(nai)腐蝕(shi)性(xing)能(neng)(neng)好、蠕(ru)變性(xing)能(neng)(neng)好等等優點。耐(nai)(nai)熱(re)鋁合金(jin)(jin)導線(xian)(xian)最大的(de)(de)(de)(de)特點就是允(yun)許工作溫度(du)高(gao)，與(yu)(yu)同(tong)截面(mian)的(de)(de)(de)(de)鋼芯鋁絞線(xian)(xian)相(xiang) 比，載(zai)流量(liang)能(neng)(neng)提高(gao)50%以上，在(zai)線(xian)(xian)路(lu)(lu)擴容(rong)改造(zao)過(guo)程中，尤其在(zai)線(xian)(xian)路(lu)(lu)走廊狹(xia)窄地區，只(zhi)需要(yao)更換相(xiang)近截面(mian)規格的(de)(de)(de)(de)耐(nai)(nai)熱(re)鋁合金(jin)(jin)導線(xian)(xian)，不需要(yao)更換鐵塔就能(neng)(neng)達到增大送電 容(rong)量(liang)的(de)(de)(de)(de)目的(de)(de)(de)(de)。這非常適用于受用地限(xian)制，或更新(xin)線(xian)(xian)路(lu)(lu)需要(yao)花費更多的(de)(de)(de)(de)人(ren)力、財力的(de)(de)(de)(de)地方。

交流輸電(dian)(dian)線(xian)(xian)(xian)(xian)(xian)路的(de)(de)(de)電(dian)(dian)暈損(sun)失主要(yao)(yao)與導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表面(mian)場強和(he)天(tian)氣(qi)有關(guan)，根據(ju)絕(jue)(jue)緣(yuan)(yuan)水平要(yao)(yao)求確定(ding)了相間(jian)距離后，導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表面(mian)場強主要(yao)(yao)與導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)分裂數、分裂間(jian)距和(he) 子導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)直徑(jing)(jing)有關(guan)，分裂數越多，子導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)直徑(jing)(jing)越大， 表面(mian)場強越小。擴徑(jing)(jing)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)通過支撐鋁線(xian)(xian)(xian)(xian)(xian)疏繞(rao)的(de)(de)(de)方式 擴大了導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)外徑(jing)(jing)，這(zhe)樣可減(jian)(jian)小導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表面(mian)的(de)(de)(de)電(dian)(dian)場強度和(he)電(dian)(dian)暈放電(dian)(dian)，降(jiang)低噪聲，減(jian)(jian)少(shao)對無線(xian)(xian)(xian)(xian)(xian)電(dian)(dian)的(de)(de)(de)干擾。相 對于(yu)常規(gui)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)，擴徑(jing)(jing)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)重量較輕(qing)，安裝敷設(she)后的(de)(de)(de) 塑(su)蠕伸(shen)長減(jian)(jian)小，導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)永久變(bian)形減(jian)(jian)少(shao)，在滿足輸送(song)容(rong) 量要(yao)(yao)求和(he)環(huan)境保護指標的(de)(de)(de)前(qian)提下，可大幅(fu)降(jiang)低線(xian)(xian)(xian)(xian)(xian)路 整體造價。簡單說(shuo)來，擴徑(jing)(jing)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)是從常規(gui)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)中抽取數股 鋁線(xian)(xian)(xian)(xian)(xian)后繞(rao)制而成的(de)(de)(de)，是常規(gui)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)時升級進化品(pin)。各(ge)種(zhong)(zhong)耐熱鋁合金(jin)母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)及(ji)擴徑(jing)(jing)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)， LF21(A21)、6063(6063G)、LDRE(6R5)、6Z63(6063-Rr)系列鋁合金(jin)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)電(dian)(dian)管狀母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)。10KV、35KV絕(jue)(jue)緣(yuan)(yuan)銅(鋁)管狀母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)，封閉母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)，絕(jue)(jue)緣(yuan)(yuan)母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)，共相絕(jue)(jue)緣(yuan)(yuan)母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)  ，母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)橋。各(ge)種(zhong)(zhong)工業(ye)用(yong)純鋁及(ji)合金(jin)管-排(pai)-棒。特種(zhong)(zhong)導(dao)(dao)(dao)(dao)(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)，鋼芯(xin)鋁絞線(xian)(xian)(xian)(xian)(xian)，鋁矩形母(mu)(mu)線(xian)(xian)(xian)(xian)(xian)，各(ge)種(zhong)(zhong)電(dian)(dian)力金(jin)具，電(dian)(dian)力托架，

耐熱(re)鋁合金導線的(de)廣泛(fan)應用，可大量節約電(dian)力建設(she)成本(ben)費用，蘊藏著(zhu)巨大的(de)社會經濟(ji)效益。目前我(wo)國(guo)電(dian)網建設(she)正處在高速發(fa)展的(de)時期，耐熱(re)鋁合金導線等電(dian)網新(xin)技術、新(xin)設(she)備的(de)應用，對(dui)提(ti)高電(dian)網規劃、設(she)計、建設(she)與(yu)運行水平有著(zhu)現實意義。