会计学1电线电缆电线电缆第一页，共58页22.2 2.2 绝缘材料及护套绝缘材料及护套(h to)(h to)的选择的选择优点绝缘性能良好，制造工艺简便，价格较低，无论明敷或穿管都可取代橡皮绝缘线，可节约大量橡胶和棉纱缺点对气候适应性能较差，低温时变硬发脆，高温或日光照射下增塑剂容易挥发而使绝缘老化加快聚氯乙烯(j l y x)绝缘及护套电力电缆优点制造工艺简便，没有敷设高差限制，重量轻，弯曲性能好，接头制作简便，耐油，耐酸碱腐蚀，不延燃；具有内铠装结构，使钢带或钢丝免受腐蚀；价格便宜缺点绝缘电阻较油浸纸绝缘电缆低，介质损耗较高，因此6KV重要回路电缆，不宜用聚氯乙烯绝缘型电力电缆交联聚乙烯绝缘聚氯乙烯(j l y x)护套电力电缆优点 性能优良，结构简单，制造方便，外径小，重量轻，载流量大，敷设方便，除不受高差限制外，其终端和接头方便，完全可以代替纸绝缘电缆缺点 塑料绝缘电线第1页/共58页第二页，共58页32.3 2.3 铠装铠装(ki zhun)(ki zhun)选择：选择： 各种电缆外护层及铠装的适用敷设(fsh)场合护套或外护层铠装代号敷设方式环境条件室内电缆沟电缆桥架隧道管道竖井埋地水下火灾危险移动多烁石一般腐蚀严重腐蚀裸铅护套（铅包）无Q 一般橡套无 不延燃橡套(耐油)无F 聚氯乙烯护套无V 聚乙烯护套无Y 普通外护层(仅用于铅护套)裸钢带20 钢带2 裸细钢丝30细钢丝3 裸粗钢丝50粗钢丝5 第2页/共58页第三页，共58页。
4护套或外护层铠装代号敷设方式环境条件室内电缆沟电缆桥架隧道管道竖井埋地水下火灾危险移动多烁石一般腐蚀严重腐蚀一级防腐外护层裸钢带120钢带12裸细钢丝130细钢丝13裸粗钢丝150粗钢丝15二级防腐外护层钢带22细钢丝23粗钢丝25内铠装塑料（全塑电缆）钢带2229 细钢丝39 粗钢丝59 各种( zhn)电缆外护层及铠装的适用敷设场合第3页/共58页第四页，共58页5注：1.“”表示适用(shyng)；“”表示外被层为玻璃纤维时适用(shyng)；无标记则不推荐采用 2. 裸金属护套一级防腐外护层由沥青复合物加聚氯乙烯护套组成 3.铠装一级防腐外层由衬垫层、铠装层、外被层组成衬垫层由两个沥青复合 物、聚氯乙烯带和浸渍皱纸带的防水组合层组成；外被层由沥青复合物、浸渍电缆 （或浸渍玻璃纤维）和防止粘合的涂料组成 4.裸铠装一级防腐外护层的衬垫层与铠装一级外护层的衬垫层相同，但没有外 被层 5.铠装二级防腐外护层的衬垫层与铠装一级外护层的衬垫相同；钢带和细钢丝 铠装的外被层由沥青复合物和聚氯乙烯护套组成；粗钢丝铠装的镀锌钢丝外面挤包一 层聚氯乙烯护套或其它同等效能的防腐涂层，以保护钢丝免受外界腐蚀。
6.如需要用于湿热带地区的防霉特种护层可在型号规格后加代号“TH” 7.单芯钢带铠装电缆不适用(shyng)于交流线路第4页/共58页第五页，共58页62.4 2.4 电线、电缆截面电线、电缆截面(jimin)(jimin)的选择的选择电线、电缆截面选择应满足允许温升、电压损失、机械强度(qingd)等要求按温升选择(xunz)截面为保证电线、电缆的实际工作温度不超过允许值，电线、电缆按发热条件的允许长期工作电流（以下简称载流量），不应小于线路的工作电流按经济电流密度校验截面选择经济截面可按年费用支出最小原则来确定，年费用支出计算公式为 B=0.11Z+1.11N 式中Z投资； N年运行费，包括电能损耗费、折旧费等，使用年限按25年计算 输电线路经济电流密度 单位：A/mm2最大负荷利用小时(h/a)5000(三班制)架空线裸铝绞线、铜芯铝绞线1.651.150.90裸铜绞线3.002.251.75电缆铝芯1.921.731.54铜芯2.502.252.00第5页/共58页第六页，共58页7按电压(diny)损失校验截面线路电压(diny)损失允许值名 称允许电压损失（%）从配电变压器二次侧母线算起的低压线路从配电变压器二次侧母线算起的供给有照明负荷的低压线路从110（35）/10（6）KV变压器二次侧母线算起的10（6）KV母线5355第6页/共58页第七页，共58页。
8按机械强度校验(xio yn)截面 按机械强度导线允许的最小截面(jimin) 单位：mm2用途导线最小允许截面铝铜铜芯软线裸导线敷设于绝缘子上（低压架空线路）1610绝缘导线敷设于绝缘子上，支点距离L(m)室内 L22.51.0室外L22.51.52L642.56L156415L25106固定敷设护套线，轧头直敷2.51.0移动式用电设备用导线生产用1.0生活用0.2照明灯头引下线工业建筑屋内2.50.80.5屋外2.51.01.0民用建筑、室内1.50.50.4绝缘导线穿管2.51.01.0绝缘导线槽板敷设2.51.0绝缘导线线槽敷设2.51.0第7页/共58页第八页，共58页9聚氯乙烯绝缘电力电缆规格(gug)范围型号芯数标称截面(mm2)型号芯数标称截面(mm2)铜芯铝芯0.6/1(KV)3.6/6(KV)铜芯铝芯0.6/1(KV)3.6/6(KV)VV11.5800101000VV31.530010300VYVYVLV2.51000101000VLY2.530010300VLYVLYVV22VLV22101000101000VV22VLV22430010300VV23VLV23VV23VLV23VV21.5185VV32VLV32430016300VYVV33VLV33VLV2.5185VV42VLY42430016300VLYVV43VLY43第8页/共58页第九页，共58页。
102.5 2.5 电力电缆产品电力电缆产品(chnpn)(chnpn)和型号和型号聚氯乙烯绝缘(juyun)电力电缆型号、名称、敷设场合型 号名 称敷设场合铜芯铝芯VVVLV聚氯乙烯绝缘聚氯乙烯护套电力电缆可敷设在室内、隧道、电缆沟、管道、易燃及严重腐蚀地方，不能承受机械外力作用VYVLY聚氯乙烯绝缘聚乙烯护套电力电缆可敷设在室内、管道、电缆沟及严重腐蚀地方，不能承受机械外力作用VV22VLV22聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆可敷设在室内、隧道、电缆沟、地下、易燃及严重腐蚀地方，不能承受拉力作用VV23VLV23聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆可敷设在室内、电缆沟、地下及严重腐蚀地方，不能承受拉力作用VV32VLV32聚氯乙烯绝缘细钢丝铠装聚氯乙烯护套电力电缆可敷设在地下、竖井、水中及易燃及严重腐蚀地方，不能承受大拉力作用VV33VLV33聚氯乙烯绝缘细钢丝铠装聚乙烯护套电力电缆可敷设在地下、竖井、水中及严重腐蚀地方，不能承受大拉力作用VV42VLV42聚氯乙烯绝缘粗钢丝铠装聚氯乙烯护套电力电缆可敷设在竖井、易燃及严重腐蚀地方，能承受大拉力作用VV43VLV43聚氯乙烯绝缘粗钢丝铠装聚乙烯护套电力电缆可敷设在竖井及严重腐蚀地方，能承受大拉力作用聚氯乙烯(j l y x)绝缘电力电缆第9页/共58页第十页，共58页。
11型号芯数标称截面(mm2)型号芯数标称截面(mm2)铜芯铝芯0.6/1(KV)3.6/6(KV)铜芯铝芯0.6/1(KV)3.6/6(KV)VV22VLV22241853+24185VV23VLV23VVVLVVVVLV3+14300VV22VLV22VYVLYVV22VLV224+1VV23VLV32VVVLVVV32VLV32VV22VLV22VV42VLV42VVVLV441855VYVLYVV22VLV22VVVLVVV23VLY23VV22VLV22VV32VLV32VV42VLV42聚氯乙烯绝缘电力电缆规格(gug)范围第10页/共58页第十一页，共58页12第11页/共58页第十二页，共58页13绝缘的标称(bio chn)厚度导体标称截面(mm2)额定电压(kv)0.6/11.8/33.6/66/6 6/10绝缘标称厚度(mm)1.5、2.50.84、611012.23.441612.23.44251.22.23.44351.22.23.4450、701.42.23.4495、1201.62.23.441501.82.23.4418522.23.442402.22.23.443002.42.43.444002.62.63.445008002.82.83.441000 333.44 第12页/共58页第十三页，共58页。
14塑料外套的标称(bio chn)厚度护套前假定直径塑料外套护套前假定直径塑料外套护套前假定直径塑料外套标称厚度标称厚度标称厚度12.81.841.544.22.572.975.73.612.915.71.844.347.12.675.878.53.715.818.51.847.249.92.778.651.83.818.621.41.850.052.82.881.584.23.921.524.21.852.955.72.984.387.1424.327.11.955.858.5387.289.94.127.229.9258.661.43.190.092.84.230.032.82.161.564.23.292.995.74.332.935.72.264.367.13.395.898.54.435.838.52.367.269.93.498.6101.44.538.641.42.470.072.83.5第13页/共58页第十四页，共58页15交联聚乙烯绝缘(juyun)电力电缆0.6/1kv交联聚乙烯绝缘(juyun)电力电缆型号、名称及适用范围型号名称用途YJVYJLV铜芯或铝芯交联聚乙烯绝缘、聚氯乙烯护套电力电缆敷设在室内、隧道内及管道中，可经受一定的敷设牵引，但电缆不能承受机械外力作用，单芯电缆不允许敷设在磁性材料管道中YJV22YJLV22铜芯或铝芯交联聚乙烯绝缘、聚氯乙烯护套内钢带铠装电力电缆敷设在室内、隧道内、管道及埋地敷设，电缆能承受机械外力但不能承受大的拉力YJV32YJLV32铜芯或铝芯交联聚乙烯绝缘、聚氯乙烯护套内钢丝铠装电力电缆敷设在高落差地区或矿井中、水中，电缆能承受相当的拉力和机械外力作用第14页/共58页第十五页，共58页。
160.6/1kv 交联聚乙烯绝缘(juyun)电力电缆产品规格型号芯数标称截面(mm2)型号芯数标称截面(mm2)YJV YJLV11.0630YJV YJV223+14400YJV32 YJLV YULV22YJLV32YJV YJV22 YJV3221.0400YJV YJV22 YJV3241.0400YJLV YJLV22 YJLV32YJLV YJLV22YJLV32YJV YJV22 YJV3231.0400YJV YJV22 YJV3251.0400YJLV YJLV22 YJLV32YJLV YJLV22YJLV32第15页/共58页第十六页，共58页170.6/1kv交联聚乙烯绝缘电力电缆的主要(zhyo)技术性能电缆额定电压0.6/1kv绝缘热延伸试验20015min20N/cm2 压力载荷下最大伸长率不大于(%)175线芯直流电阻按GB3957-83或IEC228-78冷却后最大永久伸长率(%)15工频5min耐压试验(kv)3.5kv不击穿4h工频耐压试验(kv)不击穿2.4第16页/共58页第十七页，共58页180.6/1kv 单芯交联聚乙烯绝缘(juyun)聚氯乙烯护套电力电缆 标称截面绝缘标称厚度近似外径成品近似重量绝缘标称厚度近似外径成品近似重量(mm2)(mm)(mm)(kg/km)(mm)(mm)(kg/km)YJVYJLVYJV22YJLV221.50.75.5866572.50.75.98786340.76.451027760.76.9612790100.78.251831190.712.3300237160.79.32531490.713.3386282250.911.763581990.915511352350.912.94662450.916.163040950114.5620312117.7801493701.116.48183861.119.61028596951.118.310985001.121.513367381201.220.0713495951.223.31601847第17页/共58页第十八页，共58页。
19标称截面绝缘标称厚度近似外径成品近似重量绝缘标称厚度近似外径成品近似重量(mm2)(mm)(mm)(kg/km)(mm)(mm)(kg/km)1501.422.0816287031.425.319099841851.624.320118481.627.5233111682401.727.16258910641.730.6295314263001.829.7321613051.834.539842072400233.2740881641238.1492024725002.237.4510920242.242602829436302.446.6749635590.6/1kv 单芯交联聚乙烯绝缘(juyun)聚氯乙烯护套电力电缆 第18页/共58页第十九页，共58页200.6/1kv (3+2)芯交联聚乙烯绝缘(juyun)聚氯乙烯护套电力电缆标称截面绝缘标称厚度近似外径成品近似重量绝缘标称厚度近似外径成品近似重量(mm2)(mm)(mm)(kg/km)(mm)(mm)(kg/km)YJVYJLVYJV22YJLV223*25+2*160.92816348580.931.1201312373*35+2*160.930.1217010840.934.3298618993*50+2*25132.525081258135.5329121113*70+2*351.135.8332615791.137427225323*95+2*501.140.4458420711.144.5563231193*120+2*701.243.8560224691.248.8677336403*150+2*701.447.5658628891.452.5786241653*185+2*951.652.1823135641.657.9962149543*240+2*1201.758.71049044761.764120576038第19页/共58页第二十页，共58页。
210.6/1kv (4+1)芯交联聚乙烯绝缘(juyun)聚氯乙烯护套电力电缆标称截面绝缘标称厚度近似外径成品近似重量绝缘标称厚度近似外径成品近似重量(mm2)(mm)(mm)(kg/km)(mm)(mm)(kg/km)YJVYJLVYJV22YJLV224*25+1*160.92715767700.930188712384*35+1*160.93119488860.934227914134*50+1*2513423761108137322419564*70+1*351.138320414301.142413025754*95+1*501.142430818801.146548629424*120+1*701.246539522911.252653734344*150+1*701.450657227831.454786140814*185+1*951.655791834481.65995554843第20页/共58页第二十一页，共58页22第21页/共58页第二十二页，共58页232.6 2.6 电线电缆载流量电线电缆载流量(liling)(liling) 所列空气中敷设载流量表是以环境温度30为基准，埋地敷设载流量表是以环境温度25、土壤热阻系数为1.2.m/W为基准。
在不同敷设条件下，电线、电缆允许的载流量尚应乘以相应的校正(jiozhng)系数为使用方便，编入了不同环境温度下的载流量数据在空气中敷设（明敷）的有25、30、35及40四种，耐热塑料绝缘线及乙丙电缆有50、55、60及65四种，在土壤中直埋地敷设的有20、25及30三种载流量表的说明(shumng)当敷设处的环境温度不同于上述数据时，载流量应乘以校正系数Kt，其计算公式为cnanKt 式中 n电线、电缆线芯允许长期工作温度， a敷设处的环境温度， c已知载流量数据的对应温度，第22页/共58页第二十三页，共58页24电线(dinxin)、电缆线芯允许长期工作温度电线、电缆种类线芯允许 电线、电缆种类线芯允许 长期工作温度()长期工作温度()橡皮绝缘电线 500V65通用橡套软电缆500V65塑料绝缘电线 500V70橡皮绝缘电力电缆500V65粘性油浸纸绝缘电力电缆13KV80 不滴流油浸纸单芯及分相铅包16KV806KV6510KV7010KV60绝缘电力电缆带绝缘35KV8035KV506KV65交联聚乙烯绝缘电力电缆110KV9010KV6535KV80裸铝、铜母线或裸铝、铜绞线70聚氯乙烯绝缘电力电缆16KV70乙丙橡皮绝缘电缆90第23页/共58页第二十四页，共58页。
25空气(kngq)中敷设不同环境温度时载流量的校正系数K t值线芯长期工作温度()空 气 温 度 202530354045901.081.0410.960.910.87801.11.0510.950.890.84701.121.0610.940.870.79651.131.0710.930.850.76601.151.0810.910.820.71501.221.1210.870.710.5第24页/共58页第二十五页，共58页26直埋地敷设不同(b tn)环境温度时载流量的校正系数K t值 线芯长期工作温度()土 壤 温 度 1520253035901.071.0410.960.92801.091.0410.950.9701.11.0510.940.88651.121.0610.930.87601.131.0710.920.85501.181.0910.890.77第25页/共58页第二十六页，共58页27穿电线钢管或塑料管在空气(kngq)中多根并列敷设时载流量的校正系数K g值 管子并列根数载流量校正系数管子并列根数载流量校正系数240.954根以上0.90电缆(dinln)在托盘、梯架内多根并列敷设时载流量的校正系数K lq值支架形式电缆中心距离电缆层数校正系数支架形式电缆中心距离电缆层数校正系数理论值实用值理论值实用值托盘d1230.7/0.8(0.75/0.8)0.7/0.75(0.75/0.8)0.65/0.75(0.7/0.8)0.70.550.5梯架d1230.8/0.80.75/0.80.75/0.80.80.650.552d1230.9/0.95（0.9/1.0）0.85/0.9（0.85/0.95）0.85/0.9（0.85/0.95）2d1231.0/1.00.95/1.00.95/0.95第26页/共58页第二十七页，共58页。
28不同土壤(trng)热阻系数直埋地电缆载流量的校正系数Ktr值及土壤(trng)情况截面(mm2)不同土壤热阻系数t(.m/W)0.81.21.62.03.02.51625951202401.111.141.161.001.001.000.920.910.910.860.830.830.750.740.74土壤情况潮湿地区：沿海、湖、河畔地带，雨量多的地区，如华东、华南地区等；湿度大于9%的砂土或湿度大于14%的砂-泥土普通土壤；如东北大平原夹杂质的黑土或黄土，华北大平原黄土、黄粘土、砂土等；湿度为7%9%的砂土或湿度为12%14%的砂-泥土较干燥土壤：如高原地区，雨量较少的山区、丘陵、干燥地带；湿度为8%12%的砂-泥土干燥土壤：如高原地区、雨量少的山区、丘陵、干燥地带湿度为4%7%的砂土或湿度为4%8%的砂-泥土多石地层、非常干燥湿度4%的砂土第27页/共58页第二十八页，共58页29确定(qudng)电缆载流量的环境温度敷设场所通风条件择取的环境温度直埋地埋深处最热月平均地温水下最热月日最高水温平均值有热源设备厂房最热月的日最高温度月平均值另加5；当隧道中电缆数量较多时（特别是交联电缆），还应核算电缆发热的影响隧道、户内电缆沟无机械通风或通风不良隧道、户外电缆沟或户外明敷有遮阳时有机械通风或通风良好最热月日最高温度平均值无热源设备厂房电缆间净距(mm)3芯电缆根数123456781002003001.001.001.000.880.900.920.840.860.890.800.830.870.780.820.860.750.800.850.730.800.850.720.790.84埋地多根并列敷设时载流量(liling)的校正系数Kld值第28页/共58页第二十九页，共58页。
30聚氯乙烯绝缘电线(dinxin)明敷的载流量（n=70）截面(mm2)铝芯（BLV型）铜芯（BV、BVR型）253035402530354011.52.5461016253550709512015018519273445638511113817521726530234540318253242598010513016520525028032538017243040557599122155193235268306357162228375170911131441782182482833112025344558801111461802282813453984565191924324255751051381702152653253754304901823304052719913016020224930635340446117212837486591120148187231283326374426塑料绝缘(juyun)电线载流量：第29页/共58页第三十页，共58页31第30页/共58页第三十一页，共58页32第31页/共58页第三十二页，共58页33聚氯乙烯绝缘(juyun)电力电缆载流量第32页/共58页第三十三页，共58页。
34第33页/共58页第三十四页，共58页35交联聚乙烯绝缘(juyun)电力电缆载流量第34页/共58页第三十五页，共58页36第35页/共58页第三十六页，共58页37涂漆矩形母线(mxin)载流量单片母线(mxin)的载流量（n=70）母线尺寸铝（A）铜（A） 宽*厚 mm 交流直流交流直流2530354025303540253035402530354015*316515514513416515514513421019718517021019718517020*321520218917421520218917427525824222327525824222325*326524923321526524923321534032029927634032029927630*436534332129637034832630047544641838547544641838540*448045142238948045142238962558755050662558755050640*554050747543854551248044670065961556770566462057150*566562558553967063059054386080975669787081876570550*6.374069565160074570065560495589884077496090284577863*6.38708187657058808277757131125105699091211451079101092880*6.311501080101093211701100103095014801390130012001510142013301225100*6.3142513401255115514551368128011801810170015901470187517601650152063*8102596590283110409779158441320124011601070134512651185109080*81320124011601070135512741192110016901590149013701755165015451420100*81625153014301315169015901488137020801955183016852180205019201770125*8190017851670154020401918179516552400225521101945260024452290210563*101155108510169361180111010409561475138813001195152514321340123580*101480139013001200154014501355125019001786167015401990187017501610100*101820171016001475191017951680155023102170203018702470232021752000125*102070194518201680230021602020186526502490233021502950277025952390第36页/共58页第三十七页，共58页。
382-3片组合(zh)涂漆母线的载流量（n=70、a=25）母线尺寸 宽*厚 mm铝（A）铜（A）交流直流交流直流2片3片2片3片2片3片2片3片40*4855109040*5965125050*51180152550*6.31315170063*6.31350172015551940174022401990249580*6.316302100205524602110272026303220100*6.31935250025153040247031703245394063*81680218018402330216027902485302080*820402620240029752620337030953850100*823903050294536203060393038104690125*82650338033504250340043404400560063*102010265021102720256033002725353080*1024103100273534403100399035104450100*1028603650335041603610465043255385125*1032004100390048604100520050006250第37页/共58页第三十八页，共58页。
392.7 2.7 电压损失电压损失(snsh)(snsh)计算计算导线电阻(dinz)计算（1）导线(doxin)直流电阻 上两式中 L线路长度，m； A导线截面，mm2； Cj 绞入系数，单股导线为1，多股导线为1.02； 20导线温度为20时的电阻率，铝线芯（包括铝导 线、铝电缆、硬铝母线）为（或0.028*10-4.cm），铜线芯（包括铜电线、铜电缆、硬铜母线）为（即 0.0172*10-4.cm）； 导线温度为时的电阻率，.m（或10-4.cm）； 电阻温度系数，铝和铜都取0.004； 导线实际工作温度，ALCjR第38页/共58页第三十九页，共58页40 Rj=Kjf Klj R （2）导线(doxin)交流电阻)2(2Kjf R导线温度为时的直流电阻值， Kjf集肤效应系数，电线的Kjf可用式计算（当频率为 50HZ、芯线截面不超过240mm2时，Kjf均为1），母线的Kjf 见表 Klj 邻近效应系数，电线的Klj可从曲线求取，母线的Klj取1.03； 导线温度为时的电阻率，其值见表 r线芯半径，cm 电流透入深度(shnd)，cm，因集肤效应使电流密度沿导线横截面的径向按指数函数规律分布，工程上把电流可等效地看作仅在导线表面厚度中均匀分布，不同频率时的电流透入深度(shnd)值见表 相对导磁率，对于有色金属导线为1； f频率，HZ。
上三式中cmf5030第39页/共58页第四十页，共58页41母线(mxin)的集肤效应系数Kjf母线尺寸 宽*厚 mm 铝 铜母线尺寸铝 铜 宽*厚 mm 30*411.00563*81.031.0940*41.0051.01180*81.071.1240*51.0051.018100*81.081.1650*51.0081.028125*81.1121.2250*6.31.011.0463*101.081.1463*6.31.021.05580*101.091.1880*6.31.031.09100*101.131.23100*6.31.061.14125*101.181.25第40页/共58页第四十一页，共58页42导线(doxin)温度为时的电阻率值导线类型绝缘电线、聚氯乙烯绝缘电缆裸母线、裸绞线1KV油浸纸绝缘电力电缆线芯工作温度606575铝3.271*10-63.328*10-63.440*10-6铜1.995*10-62.030*10-62.098*10-6不同频率(pnl)时的电流透入深度值频率HZ铝 cm铜 cm606575606575501.3491.3611.3831.0391.0481.0663000.5510.5550.5650.4240.4280.4354000.4770.4810.4890.3670.3710.3775000.4270.430.4370.3290.3310.33710000.3020.3040.3090.2320.2340.238第41页/共58页第四十二页，共58页。
43第42页/共58页第四十三页，共58页44电线、母线和电缆的感抗(n kn)按下式计算导线(doxin)电抗计算式中 410*)5 . 0ln2(rDjL425. 010*)ln(ln2erDj25. 04ln10*2reDj rDj778. 0lg10*6 . 44DzDjlg10*6 . 44 当f=50HZ时，式可简化为 DzDjXlg1445. 0 第43页/共58页第四十四页，共58页45 X线路每相单位长度的感抗， /km; f频率，HZ；L电线、母线或电缆每相单位长度的电感(din n)量，H/km； Dj几何均距，cm，对于架空线为 见图，穿管电线及圆形线芯的电缆为 d+2,扇形线芯的电缆为h+2,见图； r电线或圆形线芯电缆主线芯的半径，cm d电线或圆形线芯电缆主线芯的直径，cm； DZ线芯自几何均距或等效半径，cm，其值见表 穿管电线或电缆主线芯的绝缘厚度，cm； h扇形线芯电缆主线芯的压紧高度，cm以上(yshng)三式中CABCABDDD3第44页/共58页第四十五页，共58页46线芯自几何(j h)均距Dz值线芯结构线芯截面范围mm2Dz线芯结构线芯截面范围mm2Dz实心圆导体绝缘电线610kv及以下三芯电缆160.389d37股TJ-185300LJ-300500绝缘电线1201850.384d3股LJ-100.339d7股TJ-1050LJ-16-70绝缘电线10350.363d10kv线芯为120压紧扇形的三芯电缆250.439s19股TJ-70150LJ-95240绝缘电线50950.379d矩形母线0.224(b+h)第45页/共58页第四十六页，共58页。
47第46页/共58页第四十七页，共58页48电路电压(diny)损失第47页/共58页第四十八页，共58页49第48页/共58页第四十九页，共58页50线路电压损失(snsh)的计算系数C值(cos=1)25.2102Un标称电压(V)线路系统计算公式导线C值（=50）母线C值（=65）铝铜铝铜220/380三相四线10Un245.77543.471.1220/380两相三线20.333.319.331.6220单相及直流5U2n 7.6612.567.2711.921101.923.141.822.98360.210.340.20.32240.0910.150.0870.14120.0230.0370.0220.03660.00570.00930.00540.0089第49页/共58页第五十页，共58页51电缆电路(dinl)的电压损失35KV油浸纸绝缘(juyun)电力电缆的电压损芯数*截面mm2电阻=55/km感抗/km埋地25时的允许负荷MVA明敷35时的允许负荷MVA电压损失%/（MW.km)cos电压损失%/（A.km)cos粘性不滴流粘性不滴流0.80.850.90.80.850.9铝3*503*703*953*1203*1503*1853*2400.6560.4680.3440.2730.2190.1770.1360.1370.1280.1210.1160.1120.1090.1045.826.9728.4879.69910.91212.42714.5497.2758.7910.60912.12413.33715.15517.8834.9586.0657.3848.4399.75711.07613.1856.5938.17510.02111.33912.92214.76717.4050.0620.0450.0340.0280.0240.020.0160.060.0450.0340.0280.02420.0160.0590.0430.0330.0270.0220.0190.0150.0030.0020.0020.0010.0010.0010.0010.0030.0020.0020.0020.0010.0010.0010.0030.0020.0020.0020.0010.0010.001铜3*503*703*953*1203*1503*1853*2400.40.2860.210.1660.1340.1080.0830.1370.1280.1210.1160.1120.1090.1047.5789.09310.91212.42713.94315.76218.1879.90311.21513.33715.15517.27719.70222.7336.3297.9119.49311.07612.39414.2416.6138.4391054812.65814.50416.61318.98722.1510.040.030.0230.0190.0170.0140.0120.040.030.0230.0190.0170.0140.0120.0380.0280.0220.0180.0150.0130.0110.0020.0020.0010.0010.0010.0010.0010.0020.0020.0010.0010.0010.0010.0010.0020.0020.0010.0010.0010.0010.001第50页/共58页第五十一页，共58页。
5210KV油浸纸绝缘(juyun)电力电缆的电压损芯数*截面mm2电阻=55/km感抗/km埋地25时的允许负荷MVA明敷35时的允许负荷MVA电压损失%/（MW.km)cos电压损失%/（A.km)cos粘性不滴流粘性不滴流0.80.850.90.80.850.9铝3*163*253*353*503*703*953*1203*1503*1853*2402.051.3110.9370.6560.4680.3440.2730.2190.1770.1360.110.0980.0920.0870.0830.080.0780.0770.0750.0731.2821.5421.8192.2522.7713.1183.5514.074.6771.3511.6281.9922.4252.9443.2913.8114.335.0231.0911.3161.5762.0442.4422.8413.3083.7764.4861.2121.4721.7672.2522.7373.2223.624.1924.9882.1351.3851.0080.7240.5330.4060.3340.2780.2350.1922.121.3720.9960.7120.5210.3950.3230.2680.2250.1832.1051.3590.9830.70.510.3840.3120.2570.2140.1720.030.0190.0140.010.0070.0060.0050.0040.0030.0030.0310.020.0150.0110.0080.0060.0050.0040.0030.0030.0330.0210.0150.0110.0080.0060.0050.0040.0030.003铜3*163*253*353*503*703*953*1203*1503*1853*2401.250.80.5710.40.2860.210.1660.1340.1080.0830.110.0980.0920.0870.0830.080.0780.0770.0750.0731.6451.9922.3382.9443.5514.074.595.1966.0621.7322.0782.5113.1183.7244.334.855.5436.4091.4031.7322.0442.5983.1523.7074.2614.8845.751.5421.8532.2522.8933.5514.1054.6775.4046.3571.3350.8740.6420.4680.3510.2720.2270.1930.1660.1391.320.8610.630.4560.3390.2610.2160.1830.1560.131.3050.8480.6170.4440.3280.250.2050.1720.1450.1190.020.0120.0090.0070.0050.0040.0030.0030.0020.0020.0190.0130.0090.0070.0050.0040.0030.0030.0020.0020.020.0130.010.0070.0050.0030.0030.0020.0020.002第51页/共58页第五十二页，共58页。
531KV聚氯乙烯电力电缆用于三相(sn xin)380V系统的电压损失截面mm2电阻 =60/km感抗/km电压损失%（A.km）cos0.50.60.70.80.91铝2.513.0850.13.0223.6154.2084.7995.3885.96448.1780.0931.9012.272.643.0083.3733.72865.4520.0931.2791.5251.772.0142.2552.485103.3130.0870.7890.9381.0851.2321.3761.51162.0850.0820.5080.60.6920.7830.8720.95251.3340.0750.3340.3920.450.5070.5620.608350.9540.0720.2460.2870.3280.3680.4060.435500.6680.0720.1810.2090.2370.2630.2880.305700.4760.0690.1360.1550.1750.1920.2090.217950.3510.0690.1070.1210.1350.1470.1580.161200.2780.0690.0910.10.1110.120.1280.1271500.2230.070.0780.0870.0940.1010.1050.1021850.180.070.0690.0750.080.0850.0880.0822400.1390.070.0590.0640.0670.070.0710.063第52页/共58页第五十三页，共58页。
54截面mm2电阻 =60/km感抗/km电压损失%（A.km）cos0.50.60.70.80.91铜2.57.9810.11.8582.2192.5792.9383.2943.63844.9880.0931.1741.3981.6221.8442.0652.27463.3250.0930.7950.9431.0911.2381.3831.516102.0350.0870.4980.5880.6780.7660.8520.928161.2720.0820.3220.3780.4330.4860.5380.58250.8140.0750.2150.250.2840.3170.3490.371350.5810.0720.1610.1850.2090.2320.2530.265500.4070.0720.1210.1380.1530.1680.1810.186700.2910.0690.0940.1050.1150.1250.1330.133950.2140.0690.0760.0840.0910.0970.1020.0981200.1690.0690.0660.0710.0760.0810.0830.0771500.1360.070.0590.0630.0660.0690.070.0621850.110.070.0530.0560.0580.0590.0590.052400.0850.070.0470.0490.050.050.0490.0391KV聚氯乙烯电力电缆用于三相(sn xin)380V系统的电压损失第53页/共58页第五十四页，共58页。
5510KV交联聚乙烯绝缘电力电缆的电压(diny)损失截面mm2电阻=80/km感抗/km埋地25时的允许负荷MVA明敷35时的允许负荷MVA电压损失%/（MW.km)cos电压损失%/（A.km)cos0.80.850.90.80.850.9铝1625355070951201501852402.231.4261.0190.7130.510.3760.2970.2380.1920.1480.1330.120.1130.1070.1010.0960.0950.0930.090.0871.8192.1652.5113.1183.7244.2444.7635.3696.2351.7492.0782.5813.1523.8284.4865.0755.9066.8942.3301.5161.1040.7930.5860.4480.3680.3080.2600.2132.3121.5001.0890.7790.5730.4360.3560.2960.2480.2022.2941.4841.0740.7650.5590.4230.3430.2830.2360.1900.0320.0210.0150.0110.0080.0060.0050.0040.0040.0030.0340.0220.0160.0120.0080.0060.0050.0040.0040.0030.0360.0230.0170.0120.0090.0070.0050.0040.0040.003铜1625355070951201501852401.3590.870.6220.4350.310.2290.1810.1450.1180.0910.1330.120.1130.1070.1010.0960.0930.0900.0872.3382.7713.2913.9844.7635.3696.0626.8427.8812.1652.7373.3264.074.9025.7336.5647.4828.8161.4590.9600.7070.5150.3860.3010.2520.2150.1860.1561.4410.9440.6920.5010.3730.2890.2400.2030.1740.1451.4230.9280.6770.4870.3590.2760.2270.1900.1620.1330.0200.0130.0100.0070.0050.0040.0040.0030.0030.0020.0210.0140.0100.0070.0060.0040.0040.0030.0030.0020.0220.0150.0110.0080.0060.0040.0040.0030.0030.002第54页/共58页第五十五页，共58页。
566KV交联聚乙烯绝缘电力电缆的电压(diny)损失截面mm2电阻=80/km感抗/km埋地25时的允许负荷MVA明敷35时的允许负荷MVA电压损失%/（MW.km)cos电压损失%/（A.km)cos0.80.850.90.80.850.9铝1625355070951201501852402.231.4261.0190.7130.510.3760.2970.2380.1920.1480.1240.1110.1050.0990.0930.0890.0870.0850.0820.0801.0911.2991.5061.8712.2342.5462.8583.2223.7411.051.2471.5481.8912.2972.6923.0453.5444.1366.4534.11933.0492.1871.6111.2301.0060.8380.7040.5786.4084.1523.0112.1511.5771.1980.9750.8080.6740.5496.3614.1112.9722.1141.5421.1640.9420.7760.6440.5190.0540.0350.0250.0180.0130.0100.0080.0070.0060.0050.0570.0370.0270.0190.0140.0110.0090.0070.0060.0050.0600.0380.0280.0200.0140.0110.0090.0070.0060.005铜1625355070951201501852401.3590.870.6220.4350.310.2290.1810.1450.1180.0910.1240.1110.1050.0990.0930.0890.0870.0850.0820.0801.4031.6631.9752.392.8583.2223.6374.1054.7281.2991.6421.9952.4422.9413.4403.9394.4895.2904.0332.6481.9471.4151.0550.8220.6840.5800.4990.4193.9882.6081.9091.3791.0210.7890.6530.5490.4690.3913.9422.5661.8691.3410.9860.7560.6200.5170.4380.3600.0340.0220.0160.0120.0090.0070.0060.0050.0040.0040.0350.0230.0170.0120.0090.0070.0060.0050.0040.0030.0370.0240.0180.0130.0090.0070.0060.0050.0040.003第55页/共58页第五十六页，共58页。
571KV交联聚乙烯绝缘电力电缆用于三相380V系统(xtng)的电压损失截面mm2电阻 =80/km感抗/km电压损失%（A.km）cos0.50.60.70.80.91铝48.7420.0972.0312.4262.8213.2143.6053.98565.8280.0921.3651.6271.8892.152.4092.656103.5410.0850.8410.9991.1571.3141.4691.614162.230.0820.5410.640.7380.8360.9311.016251.4260.0820.3570.420.4820.5420.6010.65351.0190.080.2640.3080.3510.3930.4340.464500.7130.0790.1940.2240.2530.2820.3080.325700.510.0780.1470.1680.1880.2070.2250.232950.3760.0770.11。