電(dian)力(li)電(dian)纜(lan)(lan)對轉彎半徑的要求也比較(jiao)嚴格(ge)。電(dian)力(li)電(dian)纜(lan)(lan)在(zai)(zai)施工中，如果電(dian)力(li)電(dian)纜(lan)(lan)轉彎角度(du)過(guo)大(da)，可能使(shi)導體內部(bu)受到(dao)機械損(sun)傷(shang)，而機械損(sun)傷(shang)因被電(dian)力(li)電(dian)纜(lan)(lan)絕緣(yuan)(yuan)層掩蓋(gai)而無法看到(dao)，即使(shi)測量回路(lu)電(dian)阻(zu)，絕緣(yuan)(yuan)和泄露(lu)試驗(yan)也很難發現缺陷，運行時則在(zai)(zai)受損(sun)處過(guo)熱使(shi)電(dian)纜(lan)(lan)絕緣(yuan)(yuan)強(qiang)度(du)下降(jiang)，直到(dao)出現故障。

電(dian)(dian)力(li)電(dian)(dian)纜頭(tou)故障的多數原(yuan)因為在(zai)電(dian)(dian)纜頭(tou)制作時(shi)，三(san)根電(dian)(dian)纜頭(tou)長度(du)(du)一致，與設備連(lian)(lian)接(jie)(jie)時(shi)由于受(shou)地(di)形限制，中(zhong)相(xiang)電(dian)(dian)纜頭(tou)偏長而成為拱形，電(dian)(dian)纜頭(tou)根部受(shou)損(sun)放(fang)電(dian)(dian)。后采取措施(shi)，根據(ju)不同設備的連(lian)(lian)接(jie)(jie)，適當縮短中(zhong)相(xiang)電(dian)(dian)纜頭(tou)連(lian)(lian)接(jie)(jie)長度(du)(du)，使三(san)相(xiang)電(dian)(dian)纜頭(tou)均不受(shou)外力(li)，實踐證(zheng)明運行效果良好(hao)。由此可(ke)見，電(dian)(dian)力(li)電(dian)(dian)纜施(shi)工(gong)過程中(zhong)，要盡可(ke)能減少電(dian)(dian)纜受(shou)到的扭力(li)，在(zai)電(dian)(dian)力(li)電(dian)(dian)纜轉(zhuan)彎(wan)和(he)裕(yu)留電(dian)(dian)纜時(shi)，讓(rang)電(dian)(dian)纜處于自然彎(wan)曲(qu)，杜(du)絕內部機(ji)械損(sun)傷現象。

遼(liao)寧大(da)元電(dian)(dian)(dian)纜制造有限公(gong)(gong)司(si)位于(yu)鐵嶺鐵西工業園區，成立于(yu)1989年(nian)6月(yue)18日(ri)，原(yuan)廠名為“鐵嶺大(da)元電(dian)(dian)(dian)纜有限公(gong)(gong)司(si)”。為了適應市場需求，同時公(gong)(gong)司(si)規(gui)模的(de)(de)不斷擴大(da)和發展，于(yu)2012年(nian)6月(yue)更名為“遼(liao)寧大(da)元電(dian)(dian)(dian)纜制造有限公(gong)(gong)司(si)”，占地面(mian)積18000平方米，是(shi)電(dian)(dian)(dian)線電(dian)(dian)(dian)纜產(chan)品的(de)(de)專業生(sheng)產(chan)制造商。