【漢河電(dian)纜Dianlanbao.com】 柔(rou)性電(dian)纜彎(wan)曲(qu)試(shi)(shi)(shi)驗(yan)(yan)是在一定(ding)負荷和(he)電(dian)壓下(xia)測試(shi)(shi)(shi)PVC絕緣(yuan)和(he)護(hu)套軟電(dian)纜的(de)常用(yong)試(shi)(shi)(shi)驗(yan)(yan)。以下(xia)分(fen)析了(le)軟電(dian)纜彎(wan)曲(qu)試(shi)(shi)(shi)驗(yan)(yan)不合格的(de)因(yin)素，柔(rou)性電(dian)纜彎(wan)曲(qu)試(shi)(shi)(shi)驗(yan)(yan),并希望對(dui)其進行幫助。

瞿(ju)軟電(dian)纜在(zai)往復運動(dong)(dong)扭力(li)測(ce)試100萬次后,即(ji)200萬年單向運動(dong)(dong)應該沒有電(dian)流短路,也不發(fa)生,瞿(ju)導體(ti)之間(jian)的短路后扭力(li)測(ce)試電(dian)壓測(ce)試,結(jie)果不應發(fa)生擊穿,這(zhe)兩個測(ce)試通(tong)過,結(jie)果評價合格的,和評價為不合格。

那(nei)么導致喪失(shi)資格的(de)因(yin)素是什么呢?

1)導(dao)體(ti)本身:在導(dao)體(ti)短路的情況下，更大的可(ke)能性是導(dao)體(ti)本身不合格(ge)，如銅線(xian)雜質過(guo)多，電(dian)導(dao)率(lv)低，電(dian)導(dao)率(lv)低，銅線(xian)硬，延伸率(lv)小。

2)絕(jue)緣結構因素:在擠(ji)壓(ya)的情況(kuang)下，絕(jue)緣的厚度不能達到標準要求，或者絕(jue)緣平均不達標。在彎曲的過程中，絕(jue)緣似乎受到損壞(huai)，導致短路或斷裂。

3)電(dian)(dian)(dian)(dian)(dian)纜(lan)結(jie)構(gou)因子:電(dian)(dian)(dian)(dian)(dian)纜(lan)平行部(bu)分(fen),彎(wan)(wan)曲(qu)上(shang)電(dian)(dian)(dian)(dian)(dian)纜(lan)軸拉伸或壓力(li)進(jin)入電(dian)(dian)(dian)(dian)(dian)纜(lan)、橫向(xiang)壓縮彎(wan)(wan)曲(qu),既克服了(le)抗(kang)變形,當電(dian)(dian)(dian)(dian)(dian)纜(lan)結(jie)構(gou)不(bu)合理,彎(wan)(wan)曲(qu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)纜(lan)直線回(hui)(hui)升(sheng),上(shang)下端不(bu)能返回(hui)(hui)到(dao)(dao)原來位(wei)置(zhi),特點是電(dian)(dian)(dian)(dian)(dian)纜(lan)的(de)(de)(de)(de)形狀變化(hua),可能導(dao)(dao)致電(dian)(dian)(dian)(dian)(dian)纜(lan)斷裂失效。在相同的(de)(de)(de)(de)名義截面積中，單根銅(tong)線的(de)(de)(de)(de)數目越(yue)(yue)大(da)，音高越(yue)(yue)小，電(dian)(dian)(dian)(dian)(dian)纜(lan)越(yue)(yue)軟。如果(guo)單個銅(tong)線的(de)(de)(de)(de)直徑(jing)較大(da)，則會降(jiang)低(di)絞合導(dao)(dao)體(ti)(ti)的(de)(de)(de)(de)彈性，使測試(shi)更加脆弱。有些廠家為了(le)節省材(cai)料，降(jiang)低(di)成本，使用不(bu)合格的(de)(de)(de)(de)銅(tong)線，或導(dao)(dao)體(ti)(ti)扭曲(qu)的(de)(de)(de)(de)螺距太(tai)大(da)，所以柔軟，電(dian)(dian)(dian)(dian)(dian)纜(lan)結(jie)構(gou)的(de)(de)(de)(de)穩定性降(jiang)低(di)，在電(dian)(dian)(dian)(dian)(dian)纜(lan)往復運動的(de)(de)(de)(de)過程中會導(dao)(dao)致松線，單斷口等，使電(dian)(dian)(dian)(dian)(dian)纜(lan)結(jie)構(gou)被破壞。也(ye)有一些廠家由(you)于(yu)生產(chan)工藝問題(ti)，導(dao)(dao)體(ti)(ti)絞距太(tai)小，鋼絞線的(de)(de)(de)(de)柔軟也(ye)會受到(dao)(dao)影響(xiang)，*終會導(dao)(dao)致導(dao)(dao)體(ti)(ti)的(de)(de)(de)(de)單根斷裂，直到(dao)(dao)短(duan)路(lu)的(de)(de)(de)(de)形成。