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news-aggregate-detail"> <div id="i8pjzty" class="news-detail-title"> <h1>利用電纜故障測(cè)試儀分析電纜故障的八大原因</h1> <p> <span>瀏覽量：484</span>  <span>發(fā)布時(shí)間：2020-10-14 11:39:11</span> </p> </div> <div id="i8pjzty" class="news-detail-view"> <p>　　隨著科技的發(fā)展，我們的電纜出現(xiàn)故障可以使用電纜故障儀分析快速找到故障位置和發(fā)生故障的原因，下面小編為大家介紹一下利用電纜故障測(cè)試儀分析電纜故障的八大原因：</p><p style="text-align: center;"><img src="/Public/Uploads/image/20201014/1602646614772590.png" title="1602646614772590.png" alt="電纜故障測(cè)試儀.png"/></p><p style="text-indent: 2em;"><strong>一、機(jī)械損壞</strong></p><p>　　機(jī)械損傷引起的電纜故障占電纜事故的很大比例。有些機(jī)械損傷很小，當(dāng)時(shí)沒(méi)有造成故障，但損傷發(fā)展成故障需要幾個(gè)月甚至幾年。電纜機(jī)械損壞的主要原因如下：</p><p>　　1.安裝過(guò)程中的損壞：安裝過(guò)程中意外接觸電纜，過(guò)度機(jī)械牽引拉動(dòng)電纜，或過(guò)度彎曲損壞電纜；</p><p>　　2.電纜從外部安裝路徑后直接損壞城市建設(shè)中或附近的電纜，電纜受外力直接損壞；</p><p>　　3.車輛在道路上行駛時(shí)，地下電纜的鉛(鋁)包層因振動(dòng)或沖擊載荷而損壞。</p><p>　　4.自然現(xiàn)象造成的損壞，如中間接頭或端部絕緣膠膨脹、外殼或電纜護(hù)套膨脹、安裝在管口或支架上的電纜護(hù)套因電纜自然移動(dòng)而磨損；地面下沉、中間接頭或電線斷裂引起的過(guò)度張力。</p><p><br/></p><p>　<strong>　二、絕緣受潮</strong></p><p>　　保溫層被濕氣損壞了。電纜影響和濕度影響的主要原因是：</p><p>　　1)進(jìn)水是由于結(jié)構(gòu)未密封或接線盒或接線盒安裝不當(dāng)造成的；</p><p>　　2)電纜制作粗糙，金屬護(hù)套有孔洞或裂紋；</p><p>　　3)金屬護(hù)套被外部物體刺穿或腐蝕；</p><p><br/></p><p>　　<strong>三、絕緣老化變質(zhì)</strong></p><p>　　在電場(chǎng)的作用下，電纜絕緣介質(zhì)內(nèi)部的氣隙是自由的，降低了絕緣。絕緣介質(zhì)電離后，氣隙中產(chǎn)生臭氧、硝酸等化學(xué)產(chǎn)物，腐蝕絕緣層；絕緣層中的水分導(dǎo)致絕緣纖維水解，降低絕緣層的絕緣性能。</p><p>　　過(guò)熱會(huì)導(dǎo)致絕緣老化和惡化。電纜氣隙自由發(fā)電導(dǎo)致局部過(guò)熱和碳化。電纜過(guò)載是導(dǎo)致電纜過(guò)熱的重要因素。電纜安裝在電纜密度高的區(qū)域。電纜和隧道、穿過(guò)主管道的電纜以及熱管附近的一些電纜會(huì)因過(guò)熱而損壞。</p><p><br/></p><p>　<strong>　四、過(guò)電壓</strong></p><p>　　大氣和內(nèi)部過(guò)電壓破壞電纜絕緣，導(dǎo)致故障，擊穿點(diǎn)通常有缺陷。</p><p><br/></p><p>　　<strong>五、設(shè)計(jì)和生產(chǎn)流程不佳</strong></p><p>　　中間接頭和終端頭的防水和電場(chǎng)分布設(shè)計(jì)不好，材料選擇不當(dāng)，工藝和制造不當(dāng)都會(huì)導(dǎo)致電纜頭失效。</p><p><br/></p><p>　　<strong>六、材料缺陷</strong></p><p>　　材料缺陷主要表現(xiàn)在三個(gè)方面。一是電纜制造中存在問(wèn)題，如鉛(鋁)保護(hù)層引起的缺陷，絕緣包覆過(guò)程中的褶皺、裂紋、斷裂、搭接縫隙等。二是電纜附件的缺陷，如帶磨孔的鑄鐵、陶瓷件機(jī)械強(qiáng)度不足、裝配時(shí)其他不符合規(guī)格或未密封的零件；第三，絕緣材料的維護(hù)和管理導(dǎo)致電纜絕緣受潮、臟污和老化。</p><p><br/></p><p>　　<strong>七.保護(hù)層的腐蝕</strong></p><p>　　由于地下酸堿腐蝕和雜散電流的影響，電纜的引線外皮會(huì)出現(xiàn)腐蝕點(diǎn)、裂紋或穿孔，從而導(dǎo)致故障。</p><p><br/></p><p style="text-indent: 2em;"><strong>八、電纜絕緣物流損耗</strong></p><p>　　敷設(shè)油浸紙絕緣電纜時(shí)，地面凹槽不平，或室外磁頭在電線桿上。由于高低壓降率的波動(dòng)和高絕緣油流向低處的差異，高位電纜的絕緣性能下降，導(dǎo)致電纜故障。</p><p><br/></p> </div> </div> </div> </div> </div> <div id="i8pjzty" class="news-aggregate-sd"> <div id="i8pjzty" class="xwtji"> <div id="i8pjzty" class="panel-hd"><span>產(chǎn)品推薦</span></div> <div id="i8pjzty" class="panel-xwtj"> <ul class="news-xiw"> <li><a href="/p-11411.html">HY106型個(gè)人聲暴露計(jì)</a> </li><li><a href="/p-11410.html">德國(guó)MAHR(馬爾) MARSURF PS10/PS 10 C2表面粗糙度測(cè)量?jī)x</a> </li><li><a href="/p-11409.html">英國(guó)Burkard Hirst 孢子采樣</a> </li><li><a href="/p-11408.html">LabSen241-3S微量玻璃pH電極</a> </li><li><a href="/p-11407.html">LabSen751鈦合金食品穿刺pH電極</a> </li><li><a href="/p-11406.html">LabSen241-NMR核磁管微量pH電極</a> </li> </ul> </div> </div> <div id="i8pjzty" class="xwtji"> <div id="i8pjzty" class="panel-hd"><span>儀器資訊</span></div> <div id="i8pjzty" class="zx_xzun"> <ul class="zxzx_xwi"> <li><a 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