UL無鹵電線-梁平UL無鹵電線-彭水苗族土家族UL無鹵電線

具有低煙(yan)無(wu)鹵(lu)(lu)(lu)LSHF（Low Smoke Halogen Free）特性(xing)(xing)(xing)(xing)的(de)(de)電(dian)纜(lan)于(yu)20世紀70年代推出(chu)，***初(chu)用于(yu)安(an)裝在(zai)小型(xing)密閉空(kong)間中，如地鐵、隧道、礦井、船舶(bo)和(he)潛艇等場合。隨著傳統(tong)電(dian)纜(lan)在(zai)火災中產(chan)生煙(yan)霧的(de)(de)毒(du)性(xing)(xing)(xing)(xing)和(he)腐蝕(shi)性(xing)(xing)(xing)(xing)的(de)(de)風險越來(lai)越突出(chu)，低煙(yan)無(wu)鹵(lu)(lu)(lu)特性(xing)(xing)(xing)(xing)電(dian)纜(lan)的(de)(de)使(shi)用范圍擴展到越來(lai)越多的(de)(de)場所，比如對關鍵設(she)備和(he)系(xi)統(tong)連續運行要(yao)求較高(gao)的(de)(de)數據中心、緊急(ji)呼叫(jiao)中心和(he)電(dian)信交換站(zhan)；以及學校、醫院和(he)養(yang)老院等無(wu)法有效(xiao)迅速撤離人員(yuan)的(de)(de)特殊場所。雖(sui)然(ran)含有鹵(lu)(lu)(lu)化(hua)(hua)(hua)成(cheng)分(fen)的(de)(de)電(dian)纜(lan)絕緣和(he)護(hu)套具有的(de)(de)阻燃性(xing)(xing)(xing)(xing)，但在(zai)遇火后會(hui)釋放(fang)(fang)具有毒(du)性(xing)(xing)(xing)(xing)和(he)腐蝕(shi)性(xing)(xing)(xing)(xing)的(de)(de)煙(yan)氣(qi)。遇火后釋放(fang)(fang)的(de)(de)鹵(lu)(lu)(lu)素和(he)普遍存在(zai)的(de)(de)氫氣(qi)反應，形成(cheng)鹵(lu)(lu)(lu)化(hua)(hua)(hua)氫，遇水(shui)后形成(cheng)鹽酸、或(huo)。這些酸可能(neng)會(hui)腐蝕(shi)重要(yao)結構(gou)、部件(jian)和(he)設(she)備，并增加毒(du)性(xing)(xing)(xing)(xing)。含鹵(lu)(lu)(lu)的(de)(de)電(dian)纜(lan)在(zai)燃燒時還會(hui)顯(xian)著提高(gao)一氧化(hua)(hua)(hua)碳含量，其(qi)潛在(zai)危險更高(gao)。

實踐證明，在這些商業和(he)住宅建筑中使(shi)(shi)(shi)用(yong)低煙(yan)無(wu)鹵電(dian)(dian)纜有(you)(you)助于減少設備損壞，降(jiang)低毒性(xing)煙(yan)氣的(de)(de)釋放，同時成(cheng)為(wei)涉及環境和(he)可(ke)持續(xu)因素(su)的(de)(de)綠色環保(bao)新建項(xiang)目的(de)(de)合(he)理選擇。在美(mei)國使(shi)(shi)(shi)用(yong)低煙(yan)無(wu)鹵電(dian)(dian)纜可(ke)能會滿足美(mei)國綠色建筑委員(yuan)會LEED（Leadership in Energy and Environmental Design）綠色建筑倡(chang)議的(de)(de)項(xiang)目信貸(dai)條件(jian)。目前電(dian)(dian)纜產品除使(shi)(shi)(shi)用(yong)金屬導體外，重要組(zu)成(cheng)是聚(ju)(ju)合(he)物(wu)材(cai)料(liao)。幾(ji)十年來，電(dian)(dian)纜的(de)(de)絕(jue)緣和(he)護套材(cai)料(liao)中通(tong)常會添(tian)加(jia)溴化物(wu)等鹵化成(cheng)分來改善阻燃特性(xing)。絕(jue)緣和(he)護套所使(shi)(shi)(shi)用(yong)的(de)(de)聚(ju)(ju)氯乙(yi)烯（PVC），氟(fu)化乙(yi)烯丙(bing)烯和(he)氯化聚(ju)(ju)乙(yi)烯都含有(you)(you)鹵素(su)。其他用(yong)于電(dian)(dian)纜中的(de)(de)化合(he)物(wu)也有(you)(you)可(ke)能含有(you)(you)其他鹵化成(cheng)分的(de)(de)樹脂、添(tian)加(jia)劑和(he)色母。

UL無鹵電線-梁平UL無鹵電線-彭水苗族土家族UL無鹵電線。

無鹵電子線由電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)延伸而(er)來，符(fu)合(he)歐盟ROHS標準下的環保要求，通(tong)常(chang)用(yong)(yong)于(yu)弱電(dian)(dian)工程，如電(dian)(dian)子(zi)(zi)(zi)電(dian)(dian)氣(qi)設(she)備的內部布(bu)(bu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)等，電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)可用(yong)(yong)于(yu)電(dian)(dian)氣(qi)設(she)備布(bu)(bu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、發(fa)(fa)光(guang)二極(ji)管(guan)模塊線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、家用(yong)(yong)電(dian)(dian)器線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、汽車連(lian)接(jie)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、端(duan)子(zi)(zi)(zi)連(lian)接(jie)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、機(ji)械(xie)內部連(lian)接(jie)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、照明(ming)燈具線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)路、變壓器線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、電(dian)(dian)路板連(lian)接(jie)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)、發(fa)(fa)光(guang)二極(ji)管(guan)燈條線(xian)(xian)(xian)(xian)(xian)(xian)(xian)等。機(ji)械(xie)損(sun)傷：無(wu)鹵電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)被重物損(sun)壞(huai)(huai)，被挖掘機(ji)意(yi)外損(sun)壞(huai)(huai)，敷(fu)設(she)時(shi)無(wu)鹵電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)路過度彎曲(qu)，絕緣(yuan)受損(sun)，運(yun)輸時(shi)無(wu)鹵電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)路嚴重擠(ji)壓，絕緣(yuan)層和保護層受損(sun)，底層下沉，直埋(mai)(mai)電(dian)(dian)纜(lan)拉得太大等，絕緣(yuan)因均而(er)損(sun)壞(huai)(huai)，甚至無(wu)鹵電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)路也可能斷裂，為了避免電(dian)(dian)纜(lan)的機(ji)械(xie)損(sun)壞(huai)(huai)，可以使用(yong)(yong)架空無(wu)鹵電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)路，無(wu)鹵電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)路沿墻(qiang)敷(fu)設(she)時(shi)，應(ying)隱 蔽，地埋(mai)(mai)應(ying)留有(you)明(ming)顯(xian)標志(zhi)，禁止(zhi)在無(wu)鹵電(dian)(dian)子(zi)(zi)(zi)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)路周圍(wei)取土。

絕緣受潮：由(you)于無(wu)鹵電(dian)(dian)(dian)子(zi)(zi)線(xian)(xian)(xian)路(lu)(lu)施(shi)工工藝差，濕氣(qi)(qi)侵入(ru)電(dian)(dian)(dian)子(zi)(zi)線(xian)(xian)(xian)路(lu)(lu)內(nei)(nei)(nei)部，或無(wu)鹵電(dian)(dian)(dian)子(zi)(zi)線(xian)(xian)(xian)路(lu)(lu)內(nei)(nei)(nei)保護(hu)層損壞，濕氣(qi)(qi)進入(ru)無(wu)鹵電(dian)(dian)(dian)子(zi)(zi)線(xian)(xian)(xian)路(lu)(lu)；鉛包電(dian)(dian)(dian)纜(lan)敷設(she)在震(zhen)源周(zhou)圍，因長期振動而疲勞開裂(lie)，無(wu)鹵電(dian)(dian)(dian)子(zi)(zi)線(xian)(xian)(xian)路(lu)(lu)的外皮被(bei)腐蝕并(bing)漂浮，由(you)于制(zhi)造質(zhi)量不好(hao)，鉛包上(shang)有(you)小孔(kong)或裂(lie)紋；鑒于這些現象，應加(jia)強(qiang)無(wu)鹵電(dian)(dian)(dian)子(zi)(zi)線(xian)(xian)(xian)路(lu)(lu)外層的維護(hu)，并(bing)按期在外保護(hu)層上(shang)涂一層瀝(li)青。過(guo)(guo)電(dian)(dian)(dian)壓：無(wu)鹵電(dian)(dian)(dian)子(zi)(zi)線(xian)(xian)(xian)路(lu)(lu)絕緣層因大氣(qi)(qi)過(guo)(guo)電(dian)(dian)(dian)壓或內(nei)(nei)(nei)部過(guo)(guo)電(dian)(dian)(dian)壓而擊(ji)穿(chuan)，特別是系統內(nei)(nei)(nei)部過(guo)(guo)電(dian)(dian)(dian)壓會(hui)導(dao)致(zhi)多根電(dian)(dian)(dian)纜(lan)同時擊(ji)穿(chuan)，在這方面，應安裝避雷(lei)器。

絕(jue)緣(yuan)老化：在無(wu)鹵電(dian)子(zi)線路(lu)的長期(qi)運(yun)(yun)行過程中(zhong)，由于散熱不良或(huo)過載，絕(jue)緣(yuan)材料的電(dian)氣和機械功(gong)能變差，絕(jue)緣(yuan)層變脆或(huo)斷裂，如果是(shi)這種情(qing)況，應(ying)定(ding)期(qi)對無(wu)鹵素(su)電(dian)子(zi)線路(lu)進(jin)行預防(fang)性耐壓測試，在無(wu)鹵電(dian)子(zi)線路(lu)絕(jue)緣(yuan)降低(di)不符合安全運(yun)(yun)行條件，應(ying)更(geng)換(huan)新電(dian)纜。

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