由(you)(you)于電(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)外徑較(jiao)大，運(yun)輸。敷設(she)較(jiao)為(wei)困(kun)難，電(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)對轉(zhuan)彎(wan)(wan)半徑的(de)要(yao)求也(ye)比較(jiao)嚴(yan)格。電(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)在(zai)施工(gong)中(zhong)(zhong)，如果轉(zhuan)彎(wan)(wan)角度過大，可(ke)能(neng)(neng)使(shi)導體內(nei)部受(shou)(shou)到機械(xie)(xie)損(sun)傷(shang)，而機械(xie)(xie)損(sun)傷(shang)因被電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)絕(jue)緣(yuan)層掩蓋而無(wu)法(fa)看(kan)到，即使(shi)測量回路電(dian)(dian)(dian)(dian)(dian)阻，絕(jue)緣(yuan)和(he)泄露試驗也(ye)很難發現缺陷，運(yun)行時則在(zai)受(shou)(shou)損(sun)處過熱使(shi)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)絕(jue)緣(yuan)強度下降，直到出現故(gu)障。筆(bi)者曾發現多次電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)頭故(gu)障的(de)原(yuan)因為(wei)在(zai)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)頭制(zhi)(zhi)作時，三(san)(san)根(gen)(gen)(gen)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)頭長度一致，與設(she)備連(lian)接(jie)時由(you)(you)于受(shou)(shou)地形限制(zhi)(zhi)，中(zhong)(zhong)相(xiang)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)頭偏長而成為(wei)拱形，電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)頭根(gen)(gen)(gen)部受(shou)(shou)損(sun)放電(dian)(dian)(dian)(dian)(dian)。后采取措施，根(gen)(gen)(gen)據(ju)不同設(she)備的(de)連(lian)接(jie)，適(shi)當縮短中(zhong)(zhong)相(xiang)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)頭連(lian)接(jie)長度，使(shi)三(san)(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)頭均不受(shou)(shou)外力(li)，實踐證明運(yun)行效果良好。由(you)(you)此可(ke)見，電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)施工(gong)過程中(zhong)(zhong)，要(yao)盡可(ke)能(neng)(neng)減(jian)少電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)受(shou)(shou)到的(de)扭力(li)，在(zai)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)轉(zhuan)彎(wan)(wan)和(he)裕留電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)時，讓電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)處于自然彎(wan)(wan)曲，杜絕(jue)內(nei)部機械(xie)(xie)損(sun)傷(shang)現象。