絕(jue)(jue)(jue)(jue)緣(yuan)損壞引起短路(lu)故障(zhang)電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)保護鉛皮在(zai)敷(fu)設(she)時(shi)被損壞或(huo)在(zai)運(yun)(yun)行(xing)中電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)絕(jue)(jue)(jue)(jue)緣(yuan)受機械(xie)損傷，引起電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)相間(jian)(jian)或(huo)鉛皮間(jian)(jian)的(de)(de)絕(jue)(jue)(jue)(jue)緣(yuan)擊(ji)穿，產(chan)生的(de)(de)電(dian)(dian)(dian)弧使絕(jue)(jue)(jue)(jue)緣(yuan)材(cai)料(liao)(liao)及(ji)電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)外保護層材(cai)料(liao)(liao)燃(ran)燒(shao)起火。電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)長(chang)時(shi)間(jian)(jian)過(guo)載運(yun)(yun)行(xing)長(chang)時(shi)間(jian)(jian)的(de)(de)過(guo)載運(yun)(yun)行(xing)，電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)絕(jue)(jue)(jue)(jue)緣(yuan)材(cai)料(liao)(liao)的(de)(de)運(yun)(yun)行(xing)溫度(du)超(chao)過(guo)正常(chang)發熱(re)的(de)(de)較高(gao)允(yun)許溫度(du)，使電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)絕(jue)(jue)(jue)(jue)緣(yuan)老化干枯(ku)，這(zhe)種絕(jue)(jue)(jue)(jue)緣(yuan)老化干枯(ku)的(de)(de)現象，通(tong)常(chang)發生在(zai)整個電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)線路(lu)上。由于電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)絕(jue)(jue)(jue)(jue)緣(yuan)老化干枯(ku)，使絕(jue)(jue)(jue)(jue)緣(yuan)材(cai)料(liao)(liao)失(shi)去或(huo)降(jiang)低絕(jue)(jue)(jue)(jue)緣(yuan)性(xing)能(neng)和機械(xie)性(xing)能(neng)，因(yin)而(er)容易發生擊(ji)穿著火燃(ran)燒(shao)，甚至(zhi)沿(yan)電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)整個長(chang)度(du)多處同時(shi)發生燃(ran)燒(shao)起火。中間(jian)(jian)接(jie)(jie)(jie)(jie)頭盒絕(jue)(jue)(jue)(jue)緣(yuan)擊(ji)穿電(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)接(jie)(jie)(jie)(jie)頭盒的(de)(de)中間(jian)(jian)接(jie)(jie)(jie)(jie)頭因(yin)壓接(jie)(jie)(jie)(jie)不(bu)緊、焊接(jie)(jie)(jie)(jie)不(bu)牢或(huo)接(jie)(jie)(jie)(jie)頭材(cai)料(liao)(liao)選擇不(bu)當，運(yun)(yun)行(xing)中接(jie)(jie)(jie)(jie)頭氧化、發熱(re)、流膠(jiao);

BVR線(xian)(xian)(xian)(xian)是(shi)一(yi)種(zhong)銅(tong)芯聚(ju)氯乙烯(xi)絕(jue)緣軟(ruan)(ruan)電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian),其應用(yong)于固(gu)定布(bu)(bu)線(xian)(xian)(xian)(xian)時要求柔軟(ruan)(ruan)的(de)場(chang)合(he)。BVR電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)是(shi)一(yi)種(zhong)配(pei)電(dian)(dian)(dian)(dian)(dian)(dian)柜(ju)專用(yong)軟(ruan)(ruan)電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)，也叫二次線(xian)(xian)(xian)(xian)。B是(shi)指歸類屬于布(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)，V是(shi)指PVC聚(ju)氯乙烯(xi)，俗稱“塑料”，R是(shi)指軟(ruan)(ruan)的(de)意(yi)思，即增(zeng)加(jia)(jia)導(dao)(dao)體根數。適用(yong)于交流(liu)額定電(dian)(dian)(dian)(dian)(dian)(dian)壓450/750V及以下(xia)的(de)動(dong)力(li)裝置(zhi)的(de)固(gu)定敷(fu)設。如家(jia)裝照明(ming)。固(gu)定布(bu)(bu)線(xian)(xian)(xian)(xian)可(ke)用(yong)于室(shi)內明(ming)敷(fu)、穿(chuan)管等場(chang)合(he)。為(wei)了方(fang)便(bian)在安裝過程(cheng)中的(de)區別，可(ke)分為(wei)紅、黃、藍、綠、黑、白、雙共(gong)七種(zhong)顏(yan)色。由于BVR是(shi)軟(ruan)(ruan)結構(gou)的(de)，運用(yong)范圍也多(duo)在軟(ruan)(ruan)環(huan)境下(xia)。BVR電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)和(he)BV電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)唯一(yi)的(de)差別在于，R型(xing)電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)導(dao)(dao)體線(xian)(xian)(xian)(xian)徑(jing)為(wei)軟(ruan)(ruan)銅(tong)絲。即：增(zeng)加(jia)(jia)導(dao)(dao)體根數，減少單(dan)根導(dao)(dao)體直徑(jing)，單(dan)根導(dao)(dao)體直徑(jing)小于1毫米。這樣一(yi)來(lai)，BVR電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)就非常柔軟(ruan)(ruan)，敷(fu)設角度(du)要求較BV電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)大大降低，穿(chuan)線(xian)(xian)(xian)(xian)管，線(xian)(xian)(xian)(xian)槽(cao)時更加(jia)(jia)方(fang)便(bian)，快捷(jie)，降低工(gong)(gong)作(zuo)強度(du)的(de)同時大大提高了工(gong)(gong)作(zuo)效率。深受(shou)廣大電(dian)(dian)(dian)(dian)(dian)(dian)工(gong)(gong)及建筑裝飾人員喜歡。

鋁(lv)(lv)(lv)合金電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜(lan)(lan)是以AA-8000 系列鋁(lv)(lv)(lv)合金材(cai)料(liao)(liao)為(wei)導體，采(cai)用(yong)特殊緊壓工(gong)藝和(he)退火處理等先進技術發明創造的(de)(de)(de)新(xin)型(xing)材(cai)料(liao)(liao)電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜(lan)(lan)。鋁(lv)(lv)(lv)合金電(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)絕(jue)緣材(cai)料(liao)(liao)采(cai)用(yong)阻燃(ran)(ran)硅烷(wan)交聯(lian)聚乙(yi)烯(XLPE)，工(gong)藝上采(cai)用(yong)自鎖鎧裝結構，散(san)熱(re)性能(neng)遠遠優于(yu)PVC材(cai)料(liao)(liao)的(de)(de)(de)護套(tao)，可以迅(xun)速(su)散(san)熱(re)，火焰消失后火苗(miao)能(neng)迅(xun)速(su)熄滅(mie)，不會延然(ran)其(qi)它材(cai)料(liao)(liao)，阻燃(ran)(ran)性能(neng)極為(wei)優異。?鋁(lv)(lv)(lv)合金電(dian)(dian)(dian)纜(lan)(lan)采(cai)用(yong)新(xin)型(xing)材(cai)料(liao)(liao)和(he)新(xin)工(gong)藝，可確保其(qi)使(shi)用(yong)更加(jia)安(an)全?，因此深受各大工(gong)程(cheng)用(yong)戶的(de)(de)(de)青睞。鋁(lv)(lv)(lv)合金電(dian)(dian)(dian)纜(lan)(lan)常用(yong)于(yu)城市的(de)(de)(de)地(di)下電(dian)(dian)(dian)網、發電(dian)(dian)(dian)站(zhan)的(de)(de)(de)引出(chu)線路(lu)、工(gong)礦(kuang)企業內部(bu)的(de)(de)(de)供電(dian)(dian)(dian)、以及(ji)過江、過海等的(de)(de)(de)水下傳(chuan)輸電(dian)(dian)(dian)線。常用(yong)的(de)(de)(de)規格型(xing)號(hao)有YJLHV、YJLHV22、 YJLHVS、YJLHVS2等。鋁(lv)(lv)(lv)合金電(dian)(dian)(dian)纜(lan)(lan)以重量輕(qing)、敷設(she)便(bian)利、價格更親民等優勢，深受廣大工(gong)程(cheng)用(yong)戶的(de)(de)(de)喜(xi)愛。

優良的(de)鋁(lv)合(he)金(jin)導體桿材是鋁(lv)合(he)金(jin)電纜電氣性(xing)能、機械性(xing)能的(de)決定性(xing)要(yao)素，穩定地生產出符(fu)合(he)要(yao)求的(de)鋁(lv)合(he)金(jin)桿主要(yao)從(cong)以下(xia)環節(jie)入手(shou)。1)計算確定好鋁(lv)錠、中間合(he)金(jin)及添加(jia)劑(ji)的(de)使用(yong)(yong)量，依次加(jia)料(liao)在其熔化進入保溫爐后，加(jia)入添加(jia)劑(ji)精煉和(he)攪拌(ban)，同(tong)(tong)時對(dui)爐內不(bu)同(tong)(tong)點取樣(yang)分(fen)析，需要(yao)時做相應調整。2)因合(he)金(jin)精煉后溫度較高，鋁(lv)液(ye)結晶比(bi)較困難，注意隨時調整冷卻水壓(ya)力，保持結晶輪(lun)光潔(jie)，以便鋁(lv)液(ye)順利結晶成型。3)軋制時嚴格控制鋁(lv)桿的(de)抗拉強度和(he)伸長(chang)率(lv)，便于后續(xu)拉制和(he)絞線工序的(de)緊壓(ya)。因鋁(lv)桿有內應力要(yao)存(cun)放48小時以上(shang)才能使用(yong)(yong)。

1、漏(lou)電(dian)(dian)接(jie)(jie)(jie)地故障(zhang)(zhang)。造(zao)成(cheng)動力低壓電(dian)(dian)纜(lan)(lan)一相漏(lou)電(dian)(dian)接(jie)(jie)(jie)地的(de)(de)原(yuan)(yuan)因(yin)，除機械損傷、電(dian)(dian)纜(lan)(lan)與設備(bei)(bei)的(de)(de)連接(jie)(jie)(jie)頭毛刺與外殼(ke)連接(jie)(jie)(jie)、線(xian)頭脫落接(jie)(jie)(jie)外殼(ke)、等(deng)原(yuan)(yuan)因(yin)外，電(dian)(dian)纜(lan)(lan)網路(lu)中(zhong)的(de)(de)雞(ji)爪子、羊尾(wei)巴接(jie)(jie)(jie)頭是(shi)(shi)(shi)造(zao)成(cheng)電(dian)(dian)纜(lan)(lan)漏(lou)電(dian)(dian)接(jie)(jie)(jie)地的(de)(de)常見因(yin)素。2、電(dian)(dian)纜(lan)(lan)短線(xian)故障(zhang)(zhang)。電(dian)(dian)纜(lan)(lan)出現短線(xian)故障(zhang)(zhang)的(de)(de)大多數(shu)原(yuan)(yuan)因(yin)是(shi)(shi)(shi)電(dian)(dian)纜(lan)(lan)被一些大型(xing)運(yun)輸(shu)車(che)隊無意間用運(yun)輸(shu)的(de)(de)貨物(wu)給掛斷。這就要求隊組(zu)在安排運(yun)輸(shu)任務時，安全操(cao)作(zuo)(zuo)措施(shi)內容必須對(dui)(dui)(dui)(dui)現場工作(zuo)(zuo)環(huan)境進(jin)行充分說(shuo)明，尤其是(shi)(shi)(shi)巷道(dao)(dao)的(de)(de)高低、寬度(du)進(jin)行事前測量，對(dui)(dui)(dui)(dui)所運(yun)輸(shu)的(de)(de)設備(bei)(bei)體積和(he)巷道(dao)(dao)進(jin)行比對(dui)(dui)(dui)(dui)，對(dui)(dui)(dui)(dui)拐彎處的(de)(de)半(ban)徑(jing)及(ji)軌道(dao)(dao)和(he)巷幫距心中(zhong)有數(shu)，并對(dui)(dui)(dui)(dui)軌道(dao)(dao)運(yun)輸(shu)的(de)(de)設備(bei)(bei)捆扎(zha)牢固。3、加強電(dian)(dian)鉗工的(de)(de)教(jiao)育(yu)培訓(xun)，制(zhi)定(ding)全面精細的(de)(de)電(dian)(dian)器(qi)設備(bei)(bei)包機制(zhi)度(du)，尤其是(shi)(shi)(shi)電(dian)(dian)纜(lan)(lan)管理。

控制電纜中的NH-KVVP屬于什么電纜？適用于哪種場合？控制電纜顧名思義就是用于自動控制、監聽回路等系統場合的電纜。為了防止電磁波的干擾并且讓電纜適用于耐火的場合，本地礦物質防火電纜在普通的控制電纜中添加耐火材料和包裹上一層屏蔽層，就組成了耐火屏蔽型控制電纜，也就是NH-KVVP電纜。下面簡單介紹下其含義、規格、使用特性和適用范圍。NH-KVVP電纜的含義NH-KVVP電纜也就是我們說的耐火型屏蔽控制電纜，四川礦物質防火電纜其全名為(wei)銅(tong)芯聚(ju)(ju)氯(lv)(lv)乙烯(xi)絕緣(yuan)銅(tong)絲編織屏蔽(bi)聚(ju)(ju)氯(lv)(lv)乙烯(xi)護(hu)套耐火型控(kong)制電纜(lan)。兩個V分別代表(biao)(biao)聚(ju)(ju)氯(lv)(lv)乙烯(xi)絕緣(yuan)+聚(ju)(ju)氯(lv)(lv)乙烯(xi)護(hu)套；P表(biao)(biao)示屏蔽(bi)層(ceng)為(wei)銅(tong)絲編織屏蔽(bi)；NH表(biao)(biao)示耐火。其電纜(lan)的(de)組成結構為(wei)導體(ti)+云母(mu)帶+絕緣(yuan)+填充+包(bao)帶+屏蔽(bi)+護(hu)套幾部分組成。其芯數(shu)有2——61芯，但是(shi)我們一(yi)般常用(yong)芯數(shu)是(shi)2——37芯，且線芯是(shi)由幾十根細銅(tong)絲組成。常用(yong)規格是(shi)0.75——6mm2。