金環宇電線電纜：電線超負荷會容易起火
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來源：金環宇電線電纜發布日(ri)期：2019-03-14 13:42
什么叫電線超負荷呢(ni)?
電(dian)(dian)線(xian)超負荷的(de)現象在家庭日常(chang)生活中常(chang)能看(kan)到(dao)。打(da)個(ge)比方來(lai)(lai)說，電(dian)(dian)源(yuan)(yuan)線(xian)路(lu)好比家中的(de)自來(lai)(lai)水(shui)管線(xian)，在電(dian)(dian)源(yuan)(yuan)線(xian)路(lu)上(shang)使用(yong)的(de)家用(yong)電(dian)(dian)器好比是水(shui)龍頭(tou)。只擰(ning)開1個(ge)水(shui)龍頭(tou)，您會感到(dao)水(shui)流量和(he)(he)壓力很充足(zu)；同時擰(ning)開3個(ge)水(shui)龍頭(tou)，每(mei)個(ge)水(shui)龍頭(tou)的(de)流量和(he)(he)壓力就感到(dao)不(bu)足(zu)；若同時擰(ning)開5個(ge)水(shui)龍頭(tou)，每(mei)個(ge)水(shui)龍頭(tou)的(de)流量和(he)(he)壓力就會更小。所以我們(men)有時會發(fa)現電(dian)(dian)燈(deng)突(tu)然變暗，電(dian)(dian)風扇轉(zhuan)速變慢，電(dian)(dian)視機(ji)圖像變窄，電(dian)(dian)冰箱(xiang)啟動(dong)不(bu)了等異常(chang)情況。
電(dian)(dian)(dian)(dian)線(xian)本身(shen)具有一(yi)定的(de)(de)電(dian)(dian)(dian)(dian)阻。電(dian)(dian)(dian)(dian)在(zai)(zai)電(dian)(dian)(dian)(dian)線(xian)里“流動”時(shi)(shi)，因克服電(dian)(dian)(dian)(dian)阻力而消耗的(de)(de)部分(fen)電(dian)(dian)(dian)(dian)能便轉(zhuan)化為熱能，從而使(shi)電(dian)(dian)(dian)(dian)線(xian)發(fa)熱。因此，常要求(qiu)橡(xiang)膠絕緣電(dian)(dian)(dian)(dian)線(xian)的(de)(de)允許工作(zuo)溫(wen)度(du)不得超(chao)(chao)(chao)過(guo)(guo)65％，塑(su)料(liao)絕緣電(dian)(dian)(dian)(dian)線(xian)的(de)(de)允許工作(zuo)溫(wen)度(du)不得超(chao)(chao)(chao)過(guo)(guo)70°C，但當電(dian)(dian)(dian)(dian)線(xian)處于超(chao)(chao)(chao)負荷工作(zuo)狀態時(shi)(shi)，發(fa)出(chu)的(de)(de)熱量(liang)(liang)便會相應增大(da)。負荷越(yue)嚴重，產生的(de)(de)熱量(liang)(liang)越(yue)高(gao)。當溫(wen)度(du)超(chao)(chao)(chao)過(guo)(guo)250°C時(shi)(shi)，包在(zai)(zai)電(dian)(dian)(dian)(dian)線(xian)外面的(de)(de)橡(xiang)膠或塑(su)料(liao)絕緣材(cai)料(liao)就(jiu)會立即自(zi)行燃(ran)燒，并與電(dian)(dian)(dian)(dian)線(xian)分(fen)離開來。這時(shi)(shi)裸(luo)露著的(de)(de)電(dian)(dian)(dian)(dian)線(xian)就(jiu)好(hao)象一(yi)根電(dian)(dian)(dian)(dian)熱絲，散發(fa)出(chu)的(de)(de)熱量(liang)(liang)足以使(shi)墻板(ban)、地(di)板(ban)、地(di)毯(tan)和(he)貼墻布等(deng)可燃(ran)物質起火。
以上內容就是金環宇電線電纜今天帶給大家的關于電線超負荷會容易起火。更多資訊可登陸深圳市金環宇電線電纜有限公司網站查詢！
