我們目前正在用于電纜故障的查找方法取決于:故障診斷,粗略的測試點和*三個步驟。然而，在實際測試中，往往可以確定故障類型并做出粗略的測量點，但不可能在真正的*固定點進行挖掘。這是由于我們能聽到的客觀因素(公路或建筑工地的過度振動和噪音等)。以及看不見的因素(電纜方向、電纜深度過深、水中斷層點等)。電纜施工時剩余的不規范等原因)。
因此(ci)，在礦用電(dian)(dian)纜(lan)故障檢測儀/探傷(shang)儀通過(guo)電(dian)(dian)纜(lan)施工(gong)發現電(dian)(dian)纜(lan)故障之(zhi)前(qian)，運行(xing)管理(li)者要確定電(dian)(dian)纜(lan)長(chang)度、電(dian)(dian)纜(lan)方(fang)向(xiang)、周(zhou)圍特殊情況、中間頭位置、是否有施工(gong)前(qian)電(dian)(dian)纜(lan)故障*的(de)準備(bei)工(gong)作。
電纜的故(gu)障類型分析：
往年找(zhao)到(dao)(dao)結構特點,低、中(zhong)、高壓(ya)電(dian)(dian)(dian)纜(lan)故(gu)障(zhang)分析(xi),電(dian)(dian)(dian)纜(lan)單相(xiang)接地故(gu)障(zhang)比較(jiao)(jiao)常見(jian),主要原(yuan)因(yin)是(shi)電(dian)(dian)(dian)纜(lan)造(zao)成(cheng)損害。身體的(de)質量是(shi)不排除的(de)，但這(zhe)種內(nei)部短路(lu)從外(wai)部看不到(dao)(dao)痕跡是(shi)罕見(jian)的(de)。電(dian)(dian)(dian)纜(lan)的(de)短路(lu)故(gu)障(zhang)較(jiao)(jiao)少，這(zhe)是(shi)因(yin)為相(xiang)間短路(lu)通常發(fa)生(sheng)在運行過程中(zhong)。當發(fa)生(sheng)故(gu)障(zhang)時，強短路(lu)電(dian)(dian)(dian)流會引起(qi)快速斷電(dian)(dian)(dian)保護動作(zuo)和跳閘(zha)。強電(dian)(dian)(dian)流引起(qi)的(de)高溫(wen)通常會破壞電(dian)(dian)(dian)纜(lan)，導致開(kai)路(lu)故(gu)障(zhang)。內(nei)部短路(lu),電(dian)(dian)(dian)纜(lan)外(wai)觀看不到(dao)(dao)痕跡,這(zhe)樣的(de)失敗是(shi)通常由電(dian)(dian)(dian)纜(lan)質量,比較(jiao)(jiao)少見(jian)。
從(cong)電(dian)(dian)(dian)(dian)纜故(gu)障定(ding)位的角(jiao)度來(lai)看，電(dian)(dian)(dian)(dian)纜的薄(bo)弱環(huan)節是中間(jian)(jian)接(jie)(jie)頭(tou)。通常，電(dian)(dian)(dian)(dian)纜有一(yi)個或(huo)多個中間(jian)(jian)接(jie)(jie)頭(tou)。由于電(dian)(dian)(dian)(dian)纜中間(jian)(jian)接(jie)(jie)頭(tou)制(zhi)作時(shi)環(huan)境條件的限(xian)制(zhi)，電(dian)(dian)(dian)(dian)纜敷設后缺乏(fa)防潮處(chu)理，電(dian)(dian)(dian)(dian)纜制(zhi)作時(shi)中間(jian)(jian)接(jie)(jie)頭(tou)未(wei)壓(ya)緊，可能造成電(dian)(dian)(dian)(dian)纜中間(jian)(jian)接(jie)(jie)頭(tou)受潮，出現工藝(yi)缺陷。長期在(zai)高壓(ya)電(dian)(dian)(dian)(dian)場作用下產(chan)生電(dian)(dian)(dian)(dian)暈和(he)自由放電(dian)(dian)(dian)(dian)，使絕緣體形成水樹(shu)，直至絕緣老(lao)化和(he)擊穿。
隨(sui)(sui)著電纜(lan)(lan)傳輸線(xian)的(de)(de)(de)(de)(de)(de)普及，電纜(lan)(lan)故障(zhang)(zhang)也(ye)隨(sui)(sui)之出現(xian)。如何有(you)效地縮(suo)短電纜(lan)(lan)故障(zhang)(zhang)查(cha)找時(shi)(shi)間直接相(xiang)關(guan)(guan)的(de)(de)(de)(de)(de)(de)供(gong)電企業的(de)(de)(de)(de)(de)(de)經濟(ji)效益,供(gong)電可靠性和社(she)(she)會形(xing)象,同(tong)時(shi)(shi)也(ye)密切相(xiang)關(guan)(guan),社(she)(she)會生產的(de)(de)(de)(de)(de)(de)發(fa)展企業,民生。本文(wen)可為(wei)有(you)線(xian)電視從(cong)業人員提供(gong)有(you)益的(de)(de)(de)(de)(de)(de)參(can)考。它可以在發(fa)現(xian)電纜(lan)(lan)故障(zhang)(zhang)的(de)(de)(de)(de)(de)(de)同(tong)時(shi)(shi)縮(suo)短發(fa)現(xian)電纜(lan)(lan)故障(zhang)(zhang)的(de)(de)(de)(de)(de)(de)時(shi)(shi)間。同(tong)時(shi)(shi)，通過(guo)實際工作中(zhong)的(de)(de)(de)(de)(de)(de)學(xue)習和交流，提出了預防電纜(lan)(lan)故障(zhang)(zhang)的(de)(de)(de)(de)(de)(de)措施(shi)，為(wei)電網(wang)的(de)(de)(de)(de)(de)(de)穩(wen)定(ding)運(yun)行打(da)下了堅(jian)實的(de)(de)(de)(de)(de)(de)基礎。
