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儀表電纜

控制電纜的測試需要滿足哪些要求?

2022-04-06
作者:翊成網絡z

控制電纜阻燃要求:低煙無鹵纜線必須阻燃。有兩種阻燃等級,要求符合IEC60332.1(單電纜垂直燃燒試驗)和成束(電纜垂直燃燒傳播試驗)。其中,IEC60332.1要求普通纜線阻燃要求,屬于后備箱級阻燃要求。

煙密度要求對:低煙無鹵纜線進行煙密度測試。它在封閉的空間內用火燃燒電纜,并在火焰熄滅后測試之后的室內煙霧密度。要求在有煙霧的情況下透光能力能達到60%,從而保證人們在煙霧中能看清道路。

毒性要求:目前有幾種毒性試驗方法,如小鼠試驗。在低煙無鹵纜線,中,使用了鹵酸氣體排放試驗(用于低鹵試驗)和氣體酸度試驗(用于無鹵試驗)。其測試原理是通過分析低煙無鹵材料在高溫(分別為800和935)下產生的氣體來測定鹵素含量。


控制電纜廠家


控制電纜,顧名思義,是一種火災后煙霧較少的無鹵電纜。低煙無鹵的原理是電纜在火焰中燃燒時不會產生大量的有毒氣體和煙霧,使人在燃燒時不會造成很大的傷亡,大大提高人在火災中的存活率。

通用控制電纜采用商業級UL標準,適用的安全標準為UL1581。在實驗中,將幾個樣品放置在8英尺高的垂直支架上,并用指定的20KW帶狀燃燒器燃燒20分鐘。合格標準是火焰不應蔓延到電纜上端并自行熄滅。UL1581與IEC60332-3C相似,只是鋪設的電纜數量不同。商用級電纜沒有煙氣濃度規范,一般只用于同層水平布線,不宜用于樓層垂直布線。


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