在(zai)電(dian)(dian)(dian)力系(xi)統中(zhong)常用的(de)(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)有(you)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)(lan)(lan)和(he)控(kong)制(zhi)電(dian)(dian)(dian)纜(lan)(lan)(lan)兩大類,其(qi)中(zhong)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)(lan)(lan)是用來輸(shu)送和(he)分配大功率電(dian)(dian)(dian)能的(de)(de)。按絕緣(yuan)材料的(de)(de)不同,可以分為油(you)浸紙(zhi)絕緣(yuan)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)(lan)(lan)、橡皮絕緣(yuan)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)(lan)(lan)和(he)聚氯乙烯絕緣(yuan)電(dian)(dian)(dian)纜(lan)(lan)(lan),在(zai)工程(cheng)上應用最廣(guang)泛(fan)的(de)(de)是油(you)浸紙(zhi)絕緣(yuan)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)(lan)(lan),由于電(dian)(dian)(dian)纜(lan)(lan)(lan)在(zai)制(zhi)作(zuo)中(zhong),以及鋪設線路、環境(jing)溫度、施工原則等(deng),國家都有(you)明文(wen)規定。
電力電纜(lan)故障點測試方法:
電纜發生故(gu)障后(hou)(hou)一般(ban)先(xian)用(yong)1500V以上搖表或(huo)高阻計判別故(gu)障類(lei)型,再用(yong)不(bu)同(tong)儀器(qi)和方(fang)法初測故(gu)障,最后(hou)(hou)用(yong)定點法精(jing)確確定故(gu)障點,故(gu)障點的(de)精(jing)測方(fang)法有(you)感應(ying)法和聲測法兩種。
感應法,其(qi)原理是當音(yin)頻電(dian)(dian)流經(jing)過電(dian)(dian)纜線(xian)芯(xin)時(shi),在電(dian)(dian)纜的(de)(de)周(zhou)圍有電(dian)(dian)磁(ci)(ci)波(bo)存在,因些攜帶電(dian)(dian)磁(ci)(ci)感應接(jie)收(shou)器,沿線(xian)路(lu)(lu)行走時(shi),可(ke)收(shou)聽到(dao)電(dian)(dian)磁(ci)(ci)波(bo)的(de)(de)音(yin)響,音(yin)頻電(dian)(dian)流流到(dao)故障(zhang)點時(shi),電(dian)(dian)流突變,電(dian)(dian)磁(ci)(ci)波(bo)的(de)(de)音(yin)頻發生(sheng)突變,這種方法對尋(xun)找(zhao)斷線(xian)相間(jian)低電(dian)(dian)阻(zu)短路(lu)(lu)故障(zhang)很方便,但不(bu)宜于尋(xun)找(zhao)高電(dian)(dian)阻(zu)短路(lu)(lu)及單相接(jie)地故障(zhang)。
聲(sheng)測法,其原理是用(yong)高壓脈(mo)沖促使故障點放(fang)電(dian),產生放(fang)電(dian)聲(sheng),用(yong)傳感器(qi)在地面上接(jie)收這種放(fang)電(dian)聲(sheng),以測出(chu)故障點的精確(que)位置。
遼寧大(da)元電(dian)(dian)纜(lan)制造有限(xian)(xian)公(gong)(gong)司位于(yu)鐵(tie)嶺鐵(tie)西工(gong)業(ye)園區,成立于(yu)1989年6月(yue)18日,原廠名(ming)為(wei)(wei)“鐵(tie)嶺大(da)元電(dian)(dian)纜(lan)有限(xian)(xian)公(gong)(gong)司”。為(wei)(wei)了適應市場需求(qiu),同時公(gong)(gong)司規模的不斷(duan)擴大(da)和發展(zhan),于(yu)2012年6月(yue)更名(ming)為(wei)(wei)“遼寧大(da)元電(dian)(dian)纜(lan)制造有限(xian)(xian)公(gong)(gong)司”,占地面積18000平方米,是電(dian)(dian)線電(dian)(dian)纜(lan)產品(pin)的專業(ye)生產制造商。