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電線電纜進行檢測的目的

信息來源www.rodapunk.com | 發布時間2020年08月12日

對電線電纜進行檢測的目的都有什么?電纜電線投入市場都需要進行檢測,而檢測出的結果是在反映什么呢?歐耐特線纜集團為您分享電線電纜的檢測小知識。

電性能檢測主要有導體直流電阻、絕緣電阻、成品電壓試驗及絕緣線芯間電壓試驗。每項都很重要,導體電阻直接反映了電纜的電傳輸性能,直接影響電纜在通電運行中的溫度、壽命以及運行,它主要考查導體的材質和截面積,若導體的材質不好或截面積嚴重不足,就會造成導體直流電阻超標,這種電纜鋪設在線路中就會增加電流在線路上通過時的能量損耗,引起電纜導體發熱,導致包覆導體的絕緣老化開裂,造成供電線路漏電、短路,甚至引發火災,危及人身、財產安危。標準對不同規格電纜的導體直流電阻值均有嚴格的規定,不得大于標準規定的值。

電線電纜

(電線電纜)

機械性能檢測主要是考查絕緣和護套塑料材料的抗張強度、斷裂伸長率,以及老化前后,還有對于成品軟電纜進行的曲撓試驗、彎曲試驗、荷重斷芯試驗、絕緣線芯撕裂試驗、靜態曲撓試驗等。老化前后抗張強度、老化前后斷裂伸長率是電纜絕緣和護套材料較重要較基本的指標,要用做電纜絕緣和護套的材料,既要有足夠的拉伸強度不容易拉斷,又要有柔韌性,老化是指在高溫條件下,絕緣和護套材料保持其原有性能的能力,老化不能影響材料的抗張強度和伸長率,這些都直接影響電纜的使用壽命,若抗張強度和斷裂伸長率不合格,拉薩高壓電纜廠家進行電纜的施工安裝時就易出現護套或絕緣體斷裂,或在常見環境下使用的電纜其護套和絕緣容易變脆,斷裂,致使帶電導體露出,發生觸電危險。
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