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              低壓配電線路現狀與電氣火災預防

              低壓配電線路現狀與電氣火災預防

              來源:本站原創 作者:佚名 瀏覽:13248次

              內容預覽:

              低壓配電線路現狀與電氣火災預防   一、我國低壓配電線路火災的一般成因分析    電能作為當今社會最重要的能源在造福人類的同時也帶來了很多安全上的隱患。尤其是低壓配電線路作為直接連接用電設備的載體,有更多的機會與可燃物質相接觸,并且線路的絕緣材料也大多是可燃物質,再加上低壓配電線路分支節點眾多,傳輸距離長,不易察覺絕緣材料是否完好,以及隨著社會經濟的快速發展,對電能的需求量大增,而我國目前的供電量和低壓配電線路容量并不能適應用電形勢發展的需求,這些都使得低壓配電線路更易引起火災。    根據電氣火災案例的統計研究顯示,低壓配電線路電氣火災火源產生的一般規律是:超負荷工作-導體過熱-絕緣層老化-絕緣層擊穿-短路-絕緣層起火。其一般成因主要是短路、漏電、接觸不良和過載。在我國,電氣火災一般指由電氣線路、用電設備、器具以及配電設備出現故障性釋放熱能以及非故障性釋放熱能所造成的火災短路、過熱、接觸不良、過負載、漏電現象等而引起發生的火災。如表1對不同起火源所引起的重……


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