低壓電(dian)纜發生火災的原因有哪些?
作(zuo)者: 發(fa)布時(shi)間:2023-03-30
電(dian)(dian)(dian)(dian)(dian)(dian)氣(qi)線(xian)(xian)路(lu)發生(sheng)火(huo)(huo)災的(de)(de)(de)(de)(de)(de)原因,主要是過(guo)(guo)(guo)負(fu)(fu)荷、短路(lu)、接(jie)(jie)觸(chu)電(dian)(dian)(dian)(dian)(dian)(dian)阻過(guo)(guo)(guo)大以及絕(jue)緣損壞和高(gao)溫(wen)烘烤。 (1)過(guo)(guo)(guo)負(fu)(fu)荷。是指電(dian)(dian)(dian)(dian)(dian)(dian)氣(qi)設備或(huo)導線(xian)(xian)的(de)(de)(de)(de)(de)(de)功率或(huo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)超過(guo)(guo)(guo)其(qi)額定(ding)值。過(guo)(guo)(guo)載故障的(de)(de)(de)(de)(de)(de)主要危(wei)害在于,導體(ti)在過(guo)(guo)(guo)載的(de)(de)(de)(de)(de)(de)狀況(kuang)下(xia)使(shi)電(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)轉變成(cheng)熱能(neng)(neng)(neng),這樣導體(ti)和其(qi)絕(jue)緣物(wu)局(ju)部過(guo)(guo)(guo)熱,達到必須(xu)溫(wen)度時(shi)(shi),就能(neng)(neng)(neng)夠(gou)引燃(ran)附(fu)近的(de)(de)(de)(de)(de)(de)可燃(ran)物(wu),形(xing)成(cheng)火(huo)(huo)災。 (2)短路(lu)。電(dian)(dian)(dian)(dian)(dian)(dian)氣(qi)線(xian)(xian)路(lu)當(dang)發生(sheng)短路(lu)時(shi)(shi),電(dian)(dian)(dian)(dian)(dian)(dian)器線(xian)(xian)路(lu)的(de)(de)(de)(de)(de)(de)支(zhi)路(lu)負(fu)(fu)荷就會被切(qie)除(chu),電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)與(yu)負(fu)(fu)荷阻抗(kang)的(de)(de)(de)(de)(de)(de)變化成(cheng)反比當(dang)阻抗(kang)趨很小時(shi)(shi),電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)趨于非(fei)常(chang),故產生(sheng)的(de)(de)(de)(de)(de)(de)熱量非(fei)常(chang),此時(shi)(shi)的(de)(de)(de)(de)(de)(de)保險如不能(neng)(neng)(neng)瞬時(shi)(shi)斷開,隨之導線(xian)(xian)會起火(huo)(huo),從而(er)發生(sheng)火(huo)(huo)災。 (3)接(jie)(jie)觸(chu)電(dian)(dian)(dian)(dian)(dian)(dian)阻。電(dian)(dian)(dian)(dian)(dian)(dian)氣(qi)線(xian)(xian)路(lu)的(de)(de)(de)(de)(de)(de)搭接(jie)(jie),再其(qi)接(jie)(jie)點(dian)(dian)處接(jie)(jie)觸(chu)松動(dong),接(jie)(jie)點(dian)(dian)間的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)足(zu)以擊穿間隙(xi)空氣(qi),形(xing)成(cheng)空氣(qi)導電(dian)(dian)(dian)(dian)(dian)(dian),如果(guo)接(jie)(jie)觸(chu)點(dian)(dian)空隙(xi)稍大...
高低壓電線生(sheng)產的主要工藝(yi)有哪(na)些
作者: 發布時間(jian):2023-03-30
電(dian)線電(dian)纜是通過(guo)拉(la)制、絞制、包(bao)(bao)覆(fu)等幾(ji)個主(zhu)要(yao)(yao)工(gong)藝(yi)來制作完成的(de),型號規(gui)格(ge)越復雜(za),重(zhong)復性越高(gao)。 1.拉(la)制 在(zai)金(jin)屬(shu)壓(ya)(ya)力加工(gong)中,在(zai)外(wai)力作用(yong)下使金(jin)屬(shu)強行通過(guo)模具(壓(ya)(ya)輪),金(jin)屬(shu)橫(heng)截面積(ji)(ji)被(bei)壓(ya)(ya)縮,并獲得所(suo)要(yao)(yao)求的(de)橫(heng)截面積(ji)(ji)形狀和尺寸的(de)技術加工(gong)方法稱為金(jin)屬(shu)拉(la)制。電(dian)線電(dian)纜廠家 拉(la)制工(gong)藝(yi)分(fen)(fen):單(dan)絲拉(la)制和絞制拉(la)制。 2.絞制 為了提高(gao)電(dian)線電(dian)纜的(de)柔軟度、整體度,讓2根(gen)以上的(de)單(dan)線,按著規(gui)定(ding)的(de)方向交織(zhi)在(zai)一(yi)起稱為絞制。 絞制工(gong)藝(yi)分(fen)(fen):導體絞制、成纜、編織(zhi)、鋼絲裝鎧(kai)和纏繞。 3.包(bao)(bao)覆(fu) 根(gen)據對電(dian)線電(dian)纜不(bu)同(tong)的(de)性能要(yao)(yao)求,采用(yong)專用(yong)的(de)設備在(zai)導體的(de)外(wai)面包(bao)(bao)覆(fu)不(bu)同(tong)的(de)材料(liao)(liao)。包(bao)(bao)覆(fu)工(gong)藝(yi)分(fen)(fen): A、擠包(bao)(bao):橡膠、塑料(liao)(liao)、鉛、鋁等材料(liao)(liao)。 B、...
高低壓電線生產的主要(yao)工藝(yi)有(you)哪些
作者: 發(fa)布(bu)時間:2023-03-30
電(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)纜(lan)(lan)是(shi)通(tong)過拉制(zhi)(zhi)、絞(jiao)(jiao)(jiao)(jiao)制(zhi)(zhi)、包(bao)覆等幾個主(zhu)要工(gong)藝來制(zhi)(zhi)作(zuo)完成的(de),型號規(gui)(gui)格越復雜,重復性越高(gao)。 1.拉制(zhi)(zhi) 在金屬壓(ya)力加工(gong)中,在外力作(zuo)用(yong)下使金屬強行通(tong)過模具(壓(ya)輪),金屬橫截面(mian)(mian)積(ji)被壓(ya)縮,并獲得所要求(qiu)的(de)橫截面(mian)(mian)積(ji)形狀和(he)(he)尺寸的(de)技術加工(gong)方法(fa)稱為(wei)金屬拉制(zhi)(zhi)。電(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)纜(lan)(lan)廠(chang)家 拉制(zhi)(zhi)工(gong)藝分(fen):單絲拉制(zhi)(zhi)和(he)(he)絞(jiao)(jiao)(jiao)(jiao)制(zhi)(zhi)拉制(zhi)(zhi)。 2.絞(jiao)(jiao)(jiao)(jiao)制(zhi)(zhi) 為(wei)了提高(gao)電(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)纜(lan)(lan)的(de)柔軟度、整體(ti)度,讓2根以上的(de)單線(xian),按(an)著規(gui)(gui)定的(de)方向(xiang)交織在一(yi)起稱為(wei)絞(jiao)(jiao)(jiao)(jiao)制(zhi)(zhi)。 絞(jiao)(jiao)(jiao)(jiao)制(zhi)(zhi)工(gong)藝分(fen):導(dao)體(ti)絞(jiao)(jiao)(jiao)(jiao)制(zhi)(zhi)、成纜(lan)(lan)、編織、鋼絲裝鎧和(he)(he)纏繞(rao)。 3.包(bao)覆 根據對(dui)電(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)纜(lan)(lan)不同(tong)的(de)性能要求(qiu),采用(yong)專用(yong)的(de)設備在導(dao)體(ti)的(de)外面(mian)(mian)包(bao)覆不同(tong)的(de)材料(liao)。包(bao)覆工(gong)藝分(fen): A、擠包(bao):橡膠(jiao)、塑料(liao)、鉛、鋁等材料(liao)。 B、...