导体材(cai)料(liao)(liao)(liao)：根(gen)据(ju)使(shi)用(yong)环境、载流量、额(e)定电(dian)(dian)(dian)压和(he)结(jie)(jie)构(gou)不(bu)同，常用(yong)的(de)导体材(cai)料(liao)(liao)(liao)有(you)铜(tong)、铝(lv)和(he)钢带铠(kai)装三种。常用(yong)的(de)铜(tong)、铝(lv)和(he)钢带铠(kai)装导体材(cai)料(liao)(liao)(liao)，在型号中代(dai)号用(yong)大写字母(mu)表(biao)示。电(dian)(dian)(dian)线(xian)电(dian)(dian)(dian)缆中常用(yong)的(de)导体结(jie)(jie)构(gou)有(you)单丝(si)(si)绞(jiao)合、绞(jiao)合、绕包(bao)、带绝(jue)(jue)缘(yuan)(yuan)四(si)种。单丝(si)(si)绞(jiao)合结(jie)(jie)构(gou)：单丝(si)(si)绞(jiao)合结(jie)(jie)构(gou)是由两根(gen)或两根(gen)以上粗(cu)细相同的(de)单丝(si)(si)绞(jiao)合而(er)成，一般(ban)用(yong)于(yu)塑(su)料(liao)(liao)(liao)绝(jue)(jue)缘(yuan)(yuan)电(dian)(dian)(dian)线(xian)电(dian)(dian)(dian)缆。绕包(bao)式结(jie)(jie)构(gou)：绕包(bao)式结(jie)(jie)构(gou)是用(yong)一根(gen)或多根(gen)细而(er)长的(de)绝(jue)(jue)缘(yuan)(yuan)导线(xian)绕包(bao)在铜(tong)丝(si)(si)骨(gu)架或其它(ta)保护管(guan)上而(er)制成，多用(yong)于(yu)铜(tong)芯塑(su)料(liao)(liao)(liao)绝(jue)(jue)缘(yuan)(yuan)电(dian)(dian)(dian)线(xian)电(dian)(dian)(dian)缆。亚建VV42电(dian)(dian)(dian)缆厂家就找(zhao)易(yi)缆通网络科技(ji)成都(dou)有(you)限公司(si)。WDZ-YJLLW03-Z电(dian)(dian)(dian)缆批发

统(tong)计(ji)显示直埋敷设的(de)电(dian)(dian)(dian)缆(lan)(lan)事故(gu)较(jiao)多(duo)，且属于机械性损伤(shang)的(de)比例(li)相(xiang)当高。全塑电(dian)(dian)(dian)缆(lan)(lan)受鼠害而导(dao)致(zhi)故(gu)障(zhang)的(de)情况屡见(jian)不(bu)鲜。统(tong)计(ji)显示，外径10～15mm的(de)电(dian)(dian)(dian)缆(lan)(lan)受害比例(li)比较(jiao)大(da)。日本(ben)铁道(dao)因(yin)鼠害导(dao)致(zhi)电(dian)(dian)(dian)气信号事故(gu)，1969～1984年共发生335次，每年达(da)48～62次之多(duo)。水下(xia)电(dian)(dian)(dian)缆(lan)(lan)主(zhu)要在水深、水下(xia)较(jiao)长、水流速较(jiao)大(da)或有(you)(you)(you)(you)波(bo)浪，潮(chao)汐(xi)等(deng)(deng)(deng)综(zong)合作(zuo)用(yong)的(de)受力(li)(li)条件下(xia)，j靠(kao)电(dian)(dian)(dian)缆(lan)(lan)缆(lan)(lan)芯的(de)耐张(zhang)力(li)(li)往往不(bu)足(zu)以满足(zu)要求，需(xu)有(you)(you)(you)(you)钢丝(si)铠装(zhuang)且宜(yi)预(yu)扭或绞(jiao)向相(xiang)反式(shi)构造(zao)(zao)。此外，江(jiang)海(hai)(hai)等(deng)(deng)(deng)船舶的(de)投锚(mao)和海(hai)(hai)中拖网渔船的(de)渔具(ju)等(deng)(deng)(deng)，可(ke)能(neng)有(you)(you)(you)(you)机械损伤(shang)危及(ji)时，有(you)(you)(you)(you)时也需(xu)电(dian)(dian)(dian)缆(lan)(lan)具(ju)有(you)(you)(you)(you)适(shi)当防护特性，还可(ke)能(neng)有(you)(you)(you)(you)双层(ceng)钢线铠装(zhuang)、钢带(dai)加双层(ceng)钢丝(si)铠装(zhuang)，或反向卷(juan)绕(rao)的(de)双层(ceng)钢丝(si)、短节距离卷(juan)绕(rao)的(de)双层(ceng)钢丝(si)，以及(ji)铠装(zhuang)中含有(you)(you)(you)(you)聚酰(xian)胺纤(xian)维(wei)制(zhi)的(de)承(cheng)重线、碳化(hua)硅聚氯乙烯护层(ceng)等(deng)(deng)(deng)多(duo)种构造(zao)(zao)型(xing)类，可(ke)以因(yin)地制(zhi)宜(yi)选择(ze)。8.7/10kV-YJVR电(dian)(dian)(dian)缆(lan)(lan)价(jia)格表KVV22电(dian)(dian)(dian)缆(lan)(lan)厂家就找易缆(lan)(lan)通网络科技成都有(you)(you)(you)(you)限公司。

铁(tie)(tie)路(lu)(lu)电(dian)力(li)电(dian)缆(lan)(lan)(lan)又叫铁(tie)(tie)路(lu)(lu)信(xin)(xin)号(hao)(hao)(hao)(hao)电(dian)缆(lan)(lan)(lan)，铁(tie)(tie)路(lu)(lu)信(xin)(xin)号(hao)(hao)(hao)(hao)电(dian)缆(lan)(lan)(lan)是信(xin)(xin)息传(chuan)输的(de)(de)(de)媒介，适用于额定电(dian)压(ya)交流(liu)500V或直流(liu)1000V及以下传(chuan)输铁(tie)(tie)路(lu)(lu)信(xin)(xin)号(hao)(hao)(hao)(hao)、音频信(xin)(xin)号(hao)(hao)(hao)(hao)或自动信(xin)(xin)号(hao)(hao)(hao)(hao)装置(zhi)的(de)(de)(de)控(kong)制电(dian)路(lu)(lu)，其(qi)中(zhong)综合护(hu)套、铝护(hu)套铁(tie)(tie)路(lu)(lu)信(xin)(xin)号(hao)(hao)(hao)(hao)电(dian)缆(lan)(lan)(lan)具有(you)一定的(de)(de)(de)屏(ping)蔽(bi)性能(neng)，适宜于电(dian)气化区(qu)段或其(qi)它有(you)强(qiang)电(dian)干扰的(de)(de)(de)地区(qu)敷设(she)。铁(tie)(tie)路(lu)(lu)信(xin)(xin)号(hao)(hao)(hao)(hao)电(dian)缆(lan)(lan)(lan)，包(bao)(bao)括(kuo)外保(bao)护(hu)层、缆(lan)(lan)(lan)芯(xin)，以及缆(lan)(lan)(lan)芯(xin)内(nei)的(de)(de)(de)线(xian)组(zu)和芯(xin)线(xian)，所述芯(xin)线(xian)绝缘层为皮(pi)/泡沫/皮(pi)结构，所述线(xian)组(zu)至(zhi)少包(bao)(bao)括(kuo)一个带屏(ping)蔽(bi)层的(de)(de)(de)屏(ping)蔽(bi)四线(xian)组(zu)，而(er)其(qi)他线(xian)组(zu)则不带屏(ping)蔽(bi)层。该电(dian)缆(lan)(lan)(lan)具有(you)理想的(de)(de)(de)ks减、抗干扰等综合性能(neng)，能(neng)同时(shi)传(chuan)输高、低频铁(tie)(tie)路(lu)(lu)信(xin)(xin)号(hao)(hao)(hao)(hao)，实行一缆(lan)(lan)(lan)多用。

城(cheng)市(shi)(shi)高(gao)(gao)、中压(ya)配电(dian)(dian)(dian)(dian)线(xian)路有下(xia)列情况(kuang)(kuang)(kuang)应采用电(dian)(dian)(dian)(dian)缆(lan)(lan)线(xian)路。城(cheng)市(shi)(shi)繁华地(di)(di)(di)区、重(zhong)要(yao)(yao)地(di)(di)(di)段、主(zhu)要(yao)(yao)道(dao)路，以(yi)(yi)及(ji)城(cheng)市(shi)(shi)规划和市(shi)(shi)容(rong)环(huan)境(jing)有特殊要(yao)(yao)求的(de)地(di)(di)(di)区；技(ji)术上难以(yi)(yi)解(jie)决的(de)严重(zhong)腐蚀地(di)(di)(di)段；重(zhong)点(dian)风景(jing)旅游区的(de)区段；易(yi)(yi)受盐污或(huo)热带(dai)风暴(bao)侵袭(xi)的(de)沿海主(zhu)要(yao)(yao)城(cheng)市(shi)(shi)的(de)重(zhong)要(yao)(yao)供电(dian)(dian)(dian)(dian)区段；其他(ta)为(wei)电(dian)(dian)(dian)(dian)网结构和运行(xing)安全需要(yao)(yao)的(de)地(di)(di)(di)段。城(cheng)市(shi)(shi)低压(ya)配电(dian)(dian)(dian)(dian)线(xian)路有下(xia)列情况(kuang)(kuang)(kuang)应采用电(dian)(dian)(dian)(dian)缆(lan)(lan)线(xian)路负荷密(mi)度(du)高(gao)(gao)的(de)城(cheng)市(shi)(shi)中心地(di)(di)(di)区；建筑(zhu)面(mian)积较(jiao)大的(de)新建居民住(zhu)宅小区及(ji)高(gao)(gao)层(ceng)建筑(zhu)小区；依据规划不宜通过(guo)(guo)架空(kong)线(xian)路的(de)街道(dao)或(huo)地(di)(di)(di)区及(ji)进出线(xian)拥挤(ji)地(di)(di)(di)区；经(jing)过(guo)(guo)技(ji)术经(jing)济比(bi)(bi)较(jiao)采用电(dian)(dian)(dian)(dian)县团(tuan)级线(xian)路比(bi)(bi)较(jiao)合(he)适的(de)其他(ta)情况(kuang)(kuang)(kuang)。对于应该采用电(dian)(dian)(dian)(dian)缆(lan)(lan)线(xian)路而地(di)(di)(di)下(xia)不具备条(tiao)件时(shi)，可(ke)采用绝缘电(dian)(dian)(dian)(dian)缆(lan)(lan)架空(kong)敷(fu)设。户内对低压(ya)电(dian)(dian)(dian)(dian)缆(lan)(lan)来说，国家电(dian)(dian)(dian)(dian)气法规上的(de)载流量(liang)表是(shi)以(yi)(yi)环(huan)境(jing)温度(du)30℃为(wei)基础的(de)。但是(shi)，大部分(fen)地(di)(di)(di)区夏(xia)天的(de)月份，至少对建筑(zhu)物的(de)某些部分(fen)40℃为(wei)宜。在确定电(dian)(dian)(dian)(dian)缆(lan)(lan)载流量(liang)时(shi)必须考虑附(fu)近对电(dian)(dian)(dian)(dian)缆(lan)(lan)z不利的(de)热源。电(dian)(dian)(dian)(dian)缆(lan)(lan)局部过(guo)(guo)热的(de)情况(kuang)(kuang)(kuang)可(ke)能是(shi)由蒸汽管道(dao)或(huo)靠近电(dian)(dian)(dian)(dian)缆(lan)(lan)的(de)热源所引起(qi)的(de)，也可(ke)能是(shi)由于电(dian)(dian)(dian)(dian)缆(lan)(lan)穿过(guo)(guo)锅炉房(fang)或(huo)其他(ta)高(gao)(gao)温的(de)场所所致。为(wei)了避免这(zhei)类(lei)问题，可(ke)能需要(yao)(yao)改线(xian)。NG-A(BTLY)电(dian)(dian)(dian)(dian)缆(lan)(lan)厂家就找易(yi)(yi)缆(lan)(lan)通网络科技(ji)成(cheng)都(dou)有限公司。

电(dian)(dian)(dian)线(xian)(xian)是(shi)(shi)(shi)由(you)一(yi)根或几(ji)根柔软(ruan)的导线(xian)(xian)组(zu)成，外面(mian)包以(yi)轻软(ruan)的护层;电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)是(shi)(shi)(shi)由(you)一(yi)根或几(ji)根绝(jue)缘包导线(xian)(xian)组(zu)成，外面(mian)再包以(yi)金属(shu)或橡(xiang)皮制(zhi)的坚韧外层。电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)与(yu)电(dian)(dian)(dian)线(xian)(xian)一(yi)般都由(you)芯线(xian)(xian)、绝(jue)缘包皮和(he)保护外皮三个组(zu)成部(bu)分组(zu)成。但随(sui)着使用范围的扩大(da)，很多品种“线(xian)(xian)中有缆(lan)(lan)(lan)(lan)(lan)”，“缆(lan)(lan)(lan)(lan)(lan)中有线(xian)(xian)”。所以(yi)没有必要(yao)严格区(qu)分。电(dian)(dian)(dian)线(xian)(xian)电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)主(zhu)要(yao)包括裸(luo)电(dian)(dian)(dian)线(xian)(xian)、绕组(zu)线(xian)(xian)、电(dian)(dian)(dian)力电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)、通信(xin)(xin)电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)与(yu)光缆(lan)(lan)(lan)(lan)(lan)、电(dian)(dian)(dian)气(qi)装备用。电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)和(he)光缆(lan)(lan)(lan)(lan)(lan)区(qu)别电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)：其体积、重量大(da)，通信(xin)(xin)能力差，只能用作近距(ju)离通信(xin)(xin)。光缆(lan)(lan)(lan)(lan)(lan)：其体积、重量小，成本(ben)低(di)，通信(xin)(xin)容量大(da)，通信(xin)(xin)能力强等优点。电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)内部(bu)是(shi)(shi)(shi)铜芯线(xian)(xian);光缆(lan)(lan)(lan)(lan)(lan)内部(bu)是(shi)(shi)(shi)玻璃(li)纤维。亚建VLV42电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)厂家就找易(yi)缆(lan)(lan)(lan)(lan)(lan)通网络科技成都有限公司。FSY-YJVP电(dian)(dian)(dian)缆(lan)(lan)(lan)(lan)(lan)供应商(shang)

BTTZ电(dian)缆(lan)厂(chang)家就找(zhao)易(yi)缆(lan)通网(wang)络科技成都有限公(gong)司。WDZ-YJLLW03-Z电(dian)缆(lan)批发

大(da)量电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)成组敷设时，由于(yu)相互间(jian)的(de)(de)(de)加热(re)作用，降低了电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)的(de)(de)(de)载流量。规格(ge)大(da)的(de)(de)(de)电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)有时候需要考(kao)(kao)虑(lv)用两根(gen)或多根(gen)较(jiao)小(xiao)规格(ge)的(de)(de)(de)并联(lian)(lian)电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)来代替，因为大(da)截(jie)面(mian)(mian)(mian)(mian)电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)会由于(yu)集(ji)肤效(xiao)应和(he)邻近效(xiao)应使得单(dan)位截(jie)面(mian)(mian)(mian)(mian)的(de)(de)(de)载流量减少。另一方面(mian)(mian)(mian)(mian)，大(da)截(jie)面(mian)(mian)(mian)(mian)电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)的(de)(de)(de)表面(mian)(mian)(mian)(mian)积(ji)(ji)对横截(jie)面(mian)(mian)(mian)(mian)积(ji)(ji)的(de)(de)(de)比值减小(xiao)使得大(da)电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)散热(re)能(neng)力差。若多根(gen)电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)并联(lian)(lian)使用时，应考(kao)(kao)虑(lv)各个电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)的(de)(de)(de)相对位置(zhi)，以降低电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)载流量的(de)(de)(de)不均匀分布效(xiao)应。由于(yu)电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)绝(jue)缘、护套、被(bei)覆(fu)材料等的(de)(de)(de)热(re)特(te)性(xing)，在短路(lu)排除以后，导线的(de)(de)(de)冷却过程却是缓慢的(de)(de)(de)。WDZ-YJLLW03-Z电(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)批发

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