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怎么了解線纜絕緣層的好壞

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

電線外面的那層膠皮,就是線纜的絕緣層了。它既防止外部對導體造成損害割裂劃傷,又能保護內部導體發生故障后對外界造成損害。判斷電線電纜絕緣層好壞的方法就讓歐耐特線纜集團拉薩高壓電纜廠家告訴你。

對外觀完好的線纜,用手輕撫絕緣層表面,如果表面毛糙,證明絕緣層的生產工藝差,容易發生漏電、發燙斷路等故障。用指甲按壓絕緣層,如果能夠快速回彈,證明絕緣層厚度高、韌性好。
電線電纜
判斷電線電纜絕緣層好壞還可以彎折,拿一段電線,來回彎折數次,再把電線打直觀察。如果電線表面沒有痕跡,證明電線韌性較好。如果電線表面有明顯壓痕、發白,證明電線韌性差。長時間埋在地下,很容易老化、發脆,通電容易斷開裂開,將來容易漏電。

用打火機持續對著電線燒灼,直至電線絕緣層起火。之后熄滅打火機開始算,如果電線能夠在5秒以內自動熄滅,煙塵少或者無煙塵,證明電線阻燃性較好。否則證明電線阻燃能力不達標,電路過載或電路時容易引起火災。
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