電力(li)(li)電纜(lan)(lan)對轉彎半徑(jing)的要求也比較嚴(yan)格。電力(li)(li)電纜(lan)(lan)在施工中(zhong)，如果(guo)電力(li)(li)電纜(lan)(lan)轉彎角度(du)過(guo)大，可能使導體內部受到(dao)(dao)機(ji)械(xie)損傷，而(er)機(ji)械(xie)損傷因(yin)被電力(li)(li)電纜(lan)(lan)絕(jue)緣層掩(yan)蓋而(er)無(wu)法(fa)看到(dao)(dao)，即使測量回路電阻，絕(jue)緣和泄(xie)露試(shi)驗也很難發現缺陷，運行時則在受損處過(guo)熱使電纜(lan)(lan)絕(jue)緣強(qiang)度(du)下降，直到(dao)(dao)出現故障(zhang)。

電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜(lan)頭故障的多數原因為(wei)在(zai)電(dian)(dian)(dian)纜(lan)頭制作時(shi)，三根電(dian)(dian)(dian)纜(lan)頭長度一(yi)致，與設備連(lian)接(jie)時(shi)由于受(shou)(shou)地(di)形限制，中相(xiang)電(dian)(dian)(dian)纜(lan)頭偏(pian)長而成為(wei)拱形，電(dian)(dian)(dian)纜(lan)頭根部受(shou)(shou)損(sun)放電(dian)(dian)(dian)。后采(cai)取措(cuo)施，根據不(bu)同設備的連(lian)接(jie)，適(shi)當縮短中相(xiang)電(dian)(dian)(dian)纜(lan)頭連(lian)接(jie)長度，使三相(xiang)電(dian)(dian)(dian)纜(lan)頭均(jun)不(bu)受(shou)(shou)外力(li)，實(shi)踐證(zheng)明運行(xing)效果良好(hao)。由此(ci)可(ke)見，電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜(lan)施工過程中，要盡可(ke)能減少電(dian)(dian)(dian)纜(lan)受(shou)(shou)到的扭力(li)，在(zai)電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜(lan)轉彎和(he)裕留(liu)電(dian)(dian)(dian)纜(lan)時(shi)，讓(rang)電(dian)(dian)(dian)纜(lan)處于自然彎曲，杜(du)絕內(nei)部機械損(sun)傷現象。

遼(liao)寧大(da)元電(dian)(dian)(dian)纜(lan)制造有限(xian)公(gong)司(si)位(wei)于鐵嶺鐵西工業園(yuan)區，成立于1989年6月18日，原廠名為“鐵嶺大(da)元電(dian)(dian)(dian)纜(lan)有限(xian)公(gong)司(si)”。為了適(shi)應市場需求，同時公(gong)司(si)規模(mo)的(de)不斷擴大(da)和(he)發展，于2012年6月更名為“遼(liao)寧大(da)元電(dian)(dian)(dian)纜(lan)制造有限(xian)公(gong)司(si)”，占地(di)面積(ji)18000平方米，是電(dian)(dian)(dian)線電(dian)(dian)(dian)纜(lan)產品的(de)專業生產制造商。