電纜檢測電阻很重要，檢測電纜電阻的目的是什么?
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來源：金環宇電線電纜發布日(ri)期：2020-05-05 14:26
金環宇電線電纜廠(chang)家出廠(chang)的(de)電(dian)(dian)線電(dian)(dian)纜(lan)(lan)都是(shi)經過嚴格(ge)的(de)檢(jian)(jian)(jian)驗合格(ge)之(zhi)后才能(neng)出廠(chang)，對(dui)質(zhi)檢(jian)(jian)(jian)部門來說，檢(jian)(jian)(jian)測電(dian)(dian)線電(dian)(dian)纜(lan)(lan)是(shi)否合格(ge)可能(neng)需要檢(jian)(jian)(jian)測二十幾個項目，重中(zhong)之(zhi)重的(de)是(shi)電(dian)(dian)纜(lan)(lan)電(dian)(dian)阻(zu)的(de)檢(jian)(jian)(jian)測，下面是(shi)金環宇電(dian)(dian)線電(dian)(dian)纜(lan)(lan)小編(bian)分析檢(jian)(jian)(jian)測電(dian)(dian)纜(lan)(lan)電(dian)(dian)阻(zu)的(de)目的(de)是(shi)什么?
金(jin)環宇(yu)電(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)纜小編分析(xi)測定絕(jue)緣(yuan)(yuan)電(dian)(dian)(dian)阻可以(yi)發現工藝(yi)中的缺陷：如(ru)絕(jue)緣(yuan)(yuan)干(gan)燥(zao)不透或護套損傷(shang)受潮;絕(jue)緣(yuan)(yuan)受到污染(ran)和有導(dao)電(dian)(dian)(dian)雜質混入;各種原因(yin)引起(qi)的絕(jue)緣(yuan)(yuan)層開裂等(deng)。
對于通(tong)信電(dian)(dian)(dian)(dian)纜(lan)而(er)言(yan)，線(xian)間(jian)絕(jue)緣電(dian)(dian)(dian)(dian)阻(zu)(zu)過低(di)還會增大回(hui)路衰減、回(hui)路間(jian)的串音及在導電(dian)(dian)(dian)(dian)線(xian)芯上(shang)進行遠距離(li)供電(dian)(dian)(dian)(dian)泄露等，因此都要求絕(jue)緣電(dian)(dian)(dian)(dian)阻(zu)(zu)應高(gao)于規定值。金環宇(yu)電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)小編提示在電(dian)(dian)(dian)(dian)線(xian)、電(dian)(dian)(dian)(dian)纜(lan)的運(yun)行中，經(jing)常要檢測(ce)絕(jue)緣電(dian)(dian)(dian)(dian)阻(zu)(zu)和泄漏電(dian)(dian)(dian)(dian)流，以此作為是否能夠(gou)繼(ji)續安全運(yun)行的主要依據。
一(yi)、電(dian)(dian)(dian)線電(dian)(dian)(dian)纜導線直流(liu)電(dian)(dian)(dian)阻的測(ce)量：
1、對電(dian)(dian)線電(dian)(dian)纜而言，導體部分是其最重要的(de)組成部分。金環宇電(dian)(dian)線電(dian)(dian)纜提醒電(dian)(dian)線電(dian)(dian)纜的(de)導電(dian)(dian)線芯主要傳輸電(dian)(dian)能或電(dian)(dian)信號。
2、導線的(de)電(dian)(dian)阻是(shi)(shi)其電(dian)(dian)氣(qi)性能的(de)主要指標(biao)(biao)，現在標(biao)(biao)準(zhun)規定(ding)：檢(jian)測線芯的(de)直流電(dian)(dian)阻或電(dian)(dian)阻率是(shi)(shi)否(fou)超過(guo)標(biao)(biao)準(zhun)中的(de)規定(ding)的(de)值。
3、此項檢測的(de)主要目的(de)是發(fa)現生產(chan)工藝中的(de)某些缺陷：如導線斷(duan)裂或(huo)其中部分單線斷(duan)裂;導線截面不符合(he)標準(zhun);產(chan)品的(de)長度不正確等。
4、此外，對電力電纜而言，此項檢測不僅可以檢測出導體的狀況，還可以檢測出導體對電線電纜產品運行中允許的載流量是否有影響。
二、絕緣(yuan)電(dian)阻(zu)的(de)測試：絕緣(yuan)電(dian)阻(zu)式反映電(dian)線(xian)電(dian)纜產品絕緣(yuan)特性(xing)的(de)重(zhong)要指標，它與該(gai)產品的(de)耐(nai)電(dian)強度(du)，介(jie)質損耗(hao)，以及絕緣(yuan)材料在工(gong)作狀態下的(de)逐(zhu)漸劣化等(deng)均有密切的(de)關系。
三、絕(jue)(jue)緣(yuan)(yuan)(yuan)強(qiang)度(du)試驗：電線(xian)電纜(lan)(lan)的絕(jue)(jue)緣(yuan)(yuan)(yuan)強(qiang)度(du)是指(zhi)絕(jue)(jue)緣(yuan)(yuan)(yuan)結構和絕(jue)(jue)緣(yuan)(yuan)(yuan)材料承(cheng)受電場作用而不發生擊穿破壞的能力，為了檢(jian)查電線(xian)電纜(lan)(lan)產(chan)品質量，保證產(chan)品能安(an)全運行，所有絕(jue)(jue)緣(yuan)(yuan)(yuan)類型的電線(xian)電纜(lan)(lan)一般都要進行絕(jue)(jue)緣(yuan)(yuan)(yuan)強(qiang)度(du)試驗。
1、絕緣強度試驗(yan)(yan)(yan)可分為耐(nai)壓(ya)試驗(yan)(yan)(yan)和擊穿試驗(yan)(yan)(yan)。金(jin)環宇(yu)電(dian)線電(dian)纜小(xiao)編提示(shi)耐(nai)電(dian)壓(ya)實驗(yan)(yan)(yan)是(shi)在一(yi)定條件(jian)下對試品施加一(yi)定的(de)電(dian)壓(ya)，在經歷一(yi)定時(shi)(shi)間(jian)(jian)后(hou)，以是(shi)否發生擊穿作為判斷(duan)試品是(shi)否合格的(de)標(biao)準(zhun)。時(shi)(shi)間(jian)(jian)的(de)電(dian)壓(ya)一(yi)般高于(yu)該(gai)試品的(de)額定工作電(dian)壓(ya)，具(ju)體電(dian)壓(ya)值(zhi)和耐(nai)壓(ya)時(shi)(shi)間(jian)(jian)，產品標(biao)準(zhun)中均有規定。
2、通(tong)過耐壓試驗(yan)可以考驗(yan)產(chan)(chan)品在(zai)工(gong)作電(dian)(dian)壓下運行的(de)(de)可靠性(xing)和發現絕緣中的(de)(de)嚴重(zhong)缺陷(xian)，也可發現生產(chan)(chan)工(gong)藝的(de)(de)一些缺點，金環宇電(dian)(dian)線電(dian)(dian)纜小編舉例如(ru)：絕緣有嚴重(zhong)外部損傷(shang)，導(dao)體(ti)上有使電(dian)(dian)場急劇(ju)畸變的(de)(de)嚴重(zhong)缺陷(xian);絕緣在(zai)生產(chan)(chan)中有穿透性(xing)缺陷(xian)或大的(de)(de)導(dao)電(dian)(dian)雜質等。
3、 電(dian)(dian)(dian)纜在運行中(zhong)一般承受的(de)(de)是交流電(dian)(dian)(dian)壓(ya)，但在直流輸電(dian)(dian)(dian)系統中(zhong)及某些特殊(shu)場(chang)合也有承受直流電(dian)(dian)(dian)壓(ya)的(de)(de)，對于高電(dian)(dian)(dian)壓(ya)電(dian)(dian)(dian)纜還可能要遭受大氣電(dian)(dian)(dian)壓(ya)(雷電(dian)(dian)(dian))和操(cao)作過(guo)電(dian)(dian)(dian)壓(ya)的(de)(de)襲擊。因(yin)此，金環宇電(dian)(dian)(dian)線電(dian)(dian)(dian)纜小編得出按(an)實(shi)驗電(dian)(dian)(dian)壓(ya)波形的(de)(de)不同，可以分為1.交流(工頻)電(dian)(dian)(dian)壓(ya)、2.直流電(dian)(dian)(dian)壓(ya)、3沖擊電(dian)(dian)(dian)壓(ya)三種絕緣強度試驗。
