最新电缆载流量表以及电缆的选型与配线

300V/1000V电缆载流量现在时刻：13:10:25

电气工程关键数据，300V/1000V电缆载流量。2010年9月15日制作。现将常用各种导线安全载流量上传互联网，以供同行们在设计、使用和学习中参考、查阅。本资料选自《电气工程》常用数据速查手册。由白桂欣主编

（1）、8.3导线载流量。450V/750V及以上橡胶绝缘、塑料绝缘电线的载流量。BVVB型、BLVVB型、RVVB型电线载流量见表8-24。（2）、450V/750V及以下橡胶绝缘电力电缆的载流量。通用橡套软电缆的载流量见表8-25。（3）、0.6/1KV聚氯乙烯绝缘电力电缆的载流量。0.6/1KV聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆载流量见表8-26。（4）防火电缆的载流量。1、阻燃电缆的载流量。1）B、R系列阻燃电线、电缆的载流量见表8-27。2）交联聚氯乙烯绝缘阻燃电力电缆的载流量见表8-28、表8-29，短路电流见表8-30。3）聚氯乙烯绝缘阻燃电力电缆的载流量见表8-31。（5）耐火电缆的载流量。1）聚氯乙烯绝缘耐火电缆的载流量见表8-32。2）BV-105型耐热聚氯乙烯绝缘铜芯电线的载流量见表8-33。3）BTTQ、BTTVQ系列耐火电缆技术数据见表8-34。4）BTTZ、BTTVZ系列耐火电缆技术数据见表8-35。5）NH-YYJV系列耐火电力电缆技术数据见表8-36——8-38。（6）表8-39。聚氯乙烯绝缘低烟低卤阻燃电力电缆的载流量。（7）表8-40。交联聚氯乙烯绝缘低烟无卤阻燃电力电缆的载流量。

表8-24BVVB型、BLVVB型、RVVB型电线血流量型号截面积/mm平方导体种类参考外径/mm20°时最大单位长度直流电阻/(欧/km)70°时最小单位长度绝缘电阻/M欧km)25°C空气敷设载流量/A成品参考质量/(kg/km)BVVB型铜芯2x0.7514.6x7.024.50.01213422x1.014.8x7.418.10.01116492x1.515.4x8.412.10.01120652x2.516.2x9.87.410.01027972x4.016.8x11.04.610.0085381302x4.027.2x11.54.610.0080381402x6.017.4x12.03.080.0070501792x6.028.0x13.03.080.0065501922x109.6x16.01.830.0065693063x0.7514.6x9.424.50.0129.5603x1.014.8x9.818.10.01111703x1.515.4x11.512.10.01113953x2.516.2x13.57.410.0010211423x4.017.0x15.04.610.0085271983x4.027.4x16.24.610.0080272133x6.017.4x17.03.080.0070342653x6.028.0x183.080.0065342843x109.6x22.51.830.006555457BLVVB型铝芯2x2.516.2x9.811.80.01021662x4.016.8x11.07.390.008527822x6.017.4x12.04.910.0070351052x1029.6x16.03.080.0065541793x2.516.2x13.511.80.001017952x4.017.0x157.390.0085231243x6.017.4x174.910.0070271543x1027.6x22.53.080.006542265BVVB型铜芯

2x0.523.8x6.039.00.01210282x0.7523.9x6.426.00.01013352x0.7525.0x7.626.00.0111344450V/750V及以下橡胶绝缘电力电缆的载流量通用橡套软电缆的载流量见表8-25。主铁芯截面积mm平方

YQ、YQW、YHQ、型/AYZ、YZW、YHZ型/A1芯3芯2芯3芯4芯25°30°35°40°25°30°35°40°25°30°35°40°25°30°35°40°25°30°35°40°0.376656554------------0.5111098987712111091098798770.751413121112111091413121112111091118981--------1715141314131211131211101.5--------21191816181615141816151422624222022201917222019172.530282523252321192523211944138353235323027363230276534945414542383545423835

主线芯截面积/mm平方YCYCWYHC型/A1芯2芯3芯4芯25°30°35°40°25°30°35°40°25°30°35°40°25°30°35°40°2.53734322930282523262422202725232144743403739363330343129263431292665248444151474440434037344441383410577064597469645863585449635854491611210496889891847784787266847872662514813812811713512611610611510799901161081009135183171158144167156144132142132122112143133123113502262111951782081941791641761641521391771651531407028927024922825924222420422420919317722420919317795353330305279318297275251273255236215273255236215120415388358328371346320293316295273249316295273249注：1中性线截面面积同主线芯面积。2.3芯电缆中一根线芯不载流时，其流量按2芯电缆数据。

0.6、1KV聚氯乙烯绝缘电力电缆的载流量表8.26VV22、VLV22型聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆载流量。载流量计算条件1.线芯长期工作温度：70°；2.环境温度：25°；3.埋地深度：1000mm;4.土壤热阻系数：1.0m.°C/W;5.线芯轴间距离：S=2D

型号及芯数标称截面面积/mm平方参考外径/mm载流量推荐值/A成品参考质量/(KG/Km)空气中敷设埋地敷设铜芯铝芯铜芯铝芯铜芯铝芯VV22VLV22单芯101376599775314250161410178127993892872515.71321031661295273663516.91611252021566484265018.71911482401868135117020.524218730223210506129522.7298231361280137176512024.4347270415323163887315026.43953065083621959101918528.74593565304122395121524031.95544296234833333178330036.26374937085484091214540039.7750582814632497225735008436558626706309787651001776VV22VLV222芯2x4.016.3342741333883382x6.017.3433453424543792x1020.0584570545894592x1622.0776092717485432x2525.5104811229510297042x3527.812910014911612768252x5026.514611317113314878712x7030.3188144214165217813152x9534.2237184267207280016262x12036.5274213306238336518692x15040.0316245346268405922092x18543.836828639430649842610VV22VLV223芯3x4.017.0292336284503753x6.018.1372945365384253x1020.8503860467455513x1623.1665179619836753x2526.990701058213448573x3529.31118612799170210253x5031.2129100148115234414243x7034.4165127185142301717253x9538.6206160221176391321583x12041.7242188261203474125073x15045.4281218296229579030233x18551.0328254337261701336143x24057.3386299389302893044983x30061.54453444413421135054473x40081.051940350439115825

VV22VLV224芯4x4.018.2302437295294294x6.019.3383046376414914x1022.5534164499056444x1625.07155836512188044x2529.2947310884169010344x3533.511791132102247915684x5034.3140109157122296317334x7037.8178137196151383121074x9543.1219170234187503226894x12046.3255198268208610531194x15051.0294227301233747537814x18556.2333258338262909745344x24061.339730839330511664

4x30069.346435944834715018

4x40090.154842551540020202

VV22VLV223+1芯3x4+1x2.517.6302437294954053x6+1x419.1383046376084713x10+1x621.8524064498346033x16+1x1025.57055846511437703x25+1x1628.2937210884160710173x35+1x1630.511388130101206011973x50+1x2537.0142110158123279517113x70+1x3540.7181139198152358120613x95+1x5045.0222172236183467626113x120+1x7049.7258201269209575130663x150+1x7052.0297230303235678835713x185+1x9559.5338262340264837143503x240+1x12069.54043133963071052353053x300+1x15070.04723654503491357267673x400+1x18584.254442251439918398

型号及芯数标称截面面积/mm平方参考外径/mm载流量推荐值/A(环境温度25°C)成品参考质量/(KG/Km)空气中敷设埋地敷设VV225芯5x419.431386065x620.739477395x1024.2556510725x1627.0728514505x2531.99610821435x3536.411913130985x5041.614515639925x7046.818719553565x9554.122523071385x12058.826326486165x15064.7301296104295x18571.6348335128175x24080.8409387152265x30089.047243920062VV224+1芯4x4+1x2.510.931375724x6+1x420.539477104x10+1x623.6546510034x16+1x1026.5728413694x25+1x1631.19510820064x35+1x1635.211713028204x50+1x2540.314315536784x70+1x3545.118419448504x95+1x5052.222422965114x120+1x7056.926026279484x150+1x7061.929629493874x185+1x9568.6329333116524x240+1x12077.1408388148214x300+1x15085.046944218148VV223+2芯

注：单芯电缆铠装应采用非磁性材料或采用减少磁耗的结构。3x4+2x2.518.530375433x6+2x420.238476863x10+2x622.953649353x16+2x1026.0718412963x25+2x1630.29410718803x35+2x1633.511612925543x50+2x2538.814115433963x70+2x3543.618219344473x95+2x5049.422222958483x120+2x7055.025626173493x150+2x7059.129129184543x185+2x9565.6337331105683x240+2x12073.7401385133623x300+2x15081.546243916419防火电缆的载流量1.阻燃电线电缆的载流量。1）B、R系列阻燃电线电缆的载流量见表8-27.表8-27B、R系列阻燃电线电缆的载流量型号及电压等级标称截面面积/mm平方最大外径/mm20°最大单位长度直流电阻/(欧/km）70°最小单位长度绝缘电阻/(欧/km）载流量推荐值（环境温度25°）成品参考质量/(kg/km)ZR-BV300/500V0.52.436.00.015138.30.752.624.50.0121710.90.752.824.50.0141711.81.02.818.10.0112013.71.03.018.10.0132014.8ZR-BV450/750V1.53.312.10.0112520.01.53.512.10.010257.410.010347.410.0093434.54.04.44.610.00854446.84.04.84.610.00774450.06.04.93.080.00705866.76.05.43.080.00655871.0107.01.830.0064568118.0168.01.150.0050791782510.00.7270.00501112803511.50.5240.00401463785013.00.3870.00451805087015.00.2680.00352287179517.50.1930.003528199112019.00.1530.0032344122815021.00.1240.0032397155118523.50.09910.0032456189424026.50.07540.0032519246930029.50.06010.0030

308940033.00.04700.0020

3935ZR-BV450/7501.53.513.30.01025.47.980.00934.434.04.04.84.950.00744.5506.06.43.300.00658.373108.01.910.005679.5132046111.01872511.50.7800.00441462893513.00.5540.00381803805015.00.3860.00372255497017.50.2720.0032280754ZRZR-BVVB300/500V2x0.754.6x7.024.50.01213422x1.04.8x7.418.10.01116492x1.55.4x8.412.10.01120652x2.56.2x9.87.410.01027972x46.8x11.04.610.0085381302x47.2x11.54.610.0077381402x67.4x12.03.080.0070501792x68.0x13.03.080.0065501922x109.6x16.01.830.0065693063x0.754.5x9.424.50.0129.5603x1.04.8x9.818.10.01111703x1.55.4x11.512.10.01113953x2.56.2x13.57.410.010211423x4.06.8x15.04.610.085271983x4.07.2x16.24.610.077272133x6.07.4x17.03.030.070342653x6.08.0x18.03.080.0065342843x109.6x22.51.830.006555457ZR-BVR450/750V10.113434.04.04.84.610.0094450.06.05.63.080.00855872.0107.61.830.007279127.00621111842511.00.7270.00581463043512.50.5240.00521803995014.50.3840.00512285487016.50.2680.0045281739ZR-BV300/5000.32.369.20.01648.20.01411.78.00.52.639.00.01313.39.00.752.826.00.01117.012.21.03.019.50.01020.014.8ZR-BVV300/500V0.754.324.50.01217221.04.518.10.01120251.54.912.10.0112530.01034474.008544664.007744716.07.03.080.007058886.07.43.080.00655894108.81.830.0065791462x1.59.012.10.011201102x1.510.512.10.010201172x2.511.57.410.010271512x2.512.07.410.009271642x4.012.54.610.0085381952x4.013.04,610.0077382112x6.013.53.080.0070502522x6.014.53.080.0065502722x1018.01.830.0065694472x16052

6182x2524.50.7270.0050

9352x3527.50.5240.0044

12473x1.510.512.10.011131303x1.511.012.10.010131383x2.512.07.410.010211813x2.512.57.410.009211973x4.013.04.610.0085272413x4.014.04.610.0077272583x6.014.53.080.0070343283x6.015.53.080.0065343523x1019.01.830.0065555593x1622.01.150.0052

8043x2526.50.7270.0050

12203x3529.50.5240.0044

1607ZR-RVV300/300V2x0.01210372x0.756.626.00.01013473x0.56.639.00.0127.4443x0.757.026.00.0109.558ZR-RVVB300/300V

2x0.53.8x6.039.00.01210282x0.753.9x6.426.00.0101335ZR-RVV300/500V2x0.757.626.00.01113582x1.07.819.50.01016662x1.58.813.30.01020892x2.511.07.980.00927.51373x0.758.026.00.0119.5703x1.08.419.50.01011.7803x1.59.613.30.01012.71123x2.511.57.980.009211724x0.758.626.00.011

844x1.010

1014x1.511.013.30.010

1414x2.512.57.980.009

2105x0.759.426.00.011

1035x1.011.019.50.010

1195x1.512.013.30.010

1725x2.514.07.980.009

257ZR-RVVB300/500V2x0.755.0x7.626.00.0111344ZR-RVS300/300V2x0.34.369.20.0167.413.42x0.44.648.20.0149.017.02x0.55.839.00.01610.024.02x0.756.226.00.01413.031.0ZR-RVS300/300V2x0.32.3x4.369.20.0167.412.62x0.42.5x4.648.20.0149.016.02x0.753.0x5.839.00.01610.022.02x1.03,2x6.2/3.4x6.626.0/19.50.014/0.01213.0/1229.0/35.02)交联聚氯乙烯绝缘电力电缆的载流量见表8-28、表8-29，短路电流见表8-30表8-28交联聚氯乙烯绝缘阻燃电力电缆的载流量载流量计算条件

1、环境温度：25°C;2、土壤热阻系数；P=1.0°C、m/W;3.埋地敷设深度：1000mm;4.导体温度：导体长期运行温度为90°C;5.电缆敷设轴间中心距S=2D型号及电压等级ZR-YJV0.6/1kv标称截面面积/mm平方参考外径/mm载流量推荐值/A成品参考质量/(kg/km)空气中敷设埋地敷设1.55.793043452.56.1939575746.66527475672191127142169.211201672052510.831592163043511.831952614035013.342373115557015.253013887569517.06362461100512018.67419527125015020.90481592156118522.92556671191024025.54662781245330028.16774886304440031.999171019402450035.421075117050053x1.510.121271323x2.511.028361713x412.036472253x613.146592963x1015.363804403x1617.5831046383x2521.01121369543x3523.113716412663x5023.416319516143x7027.420824022463x9530.625428529753x12034.029932637763x15038.634636746823x18543.340441558023x24048.148448274373x30052.255554593134x1.510.921281604x2.511.828372114x413.037482834x614.247603764x1016.765815674x1619.1861068294x2523.211513812494x3525.514116616894x5026.216519421464x7028.921324129444x9532.526028739034x12035.930132649674x15040.235236961334x18544.440641376004x24049.448648197434x30056.0569549122714x400686628

3x2.5+1x1.511.628362123x4+1x2.512.737472773x6+1x413.947603633x10+1x616.164815273x16+1x1018.6851067663x25+1x1622.211313711403x35+1x1624.613916414753x50+1x2527.717319819513x70+1x3531.922224626633x95+1x5036.227129335783x120+1x7039.931833445673x150+1x7045.037037555143x185+1x9549.442742268503x240+1x12054.950749287413x300+1x15062.9599560110525x414.738303455x615.848604515x1018.666826885x1621.38910710115x2525.711813815535x3528.414716720715x5032.918020028925x7038.223124639745x9543.428229053265x12047.933033166575x15053.838437283105x18559.6442422102284x4+1x2.514.238483204x6+1x415.648604274x10+1x618.166816364x16+1x1020.8881079414x25+1x1624.911813714414x35+1x1627.114416518534x50+1x2531.617719626164x70+1x3536.622724435784x95+1x5041.627728848434x120+1x7046.332532961104x150+1x7051.237536974214x185+1x9556.843341891913x4+2x2.514.038483023x6+2x415.348604043x10+2x617.665815923x16+2x1020.3871068793x25+2x1624.011613613383x35+2x1625.914116416503x50+2x2530.417419523553x70+2x3534.822424232133x95+2x5039.727228643533x120+2x7044.632032755663x150+2x7048.636736666003x185+2x9554.04244158264

型号及电压等级ZR-YJV0.6/1kv标称截面面积/mm平方参考外径/mm载流量推荐值/A成品参考质量/(kg/km)空气中敷设埋地敷设2514.71622024673515.71972445745017.22372927467019.12993659739520.7361437123512022.3417500150115024.3483566182818526.4556643220224028.8666752276330031.4768856338340036.4920992473750039.81084114057903x1.513.321262683x2.514.228343183x415.237453793x616.346574633x1018.663776283x1620.7831008513x2524.211213112093x3526.413715815463x5026.816318719083x7032.021123328743x9535.425527736853x12038.829831745603x15043.434835855703x18548.540340368373x24053.548046886063x30057.6549531105774x1.514.122273004x2.515.129353574x416.237464434x617.447585504x1019.964787714x1622.38610210614x2526.311613315284x3528.714316119964x5029.816918827254x7033.521723736024x9537.326127946544x12040.730431857954x15045.435235870594x18549.640440286604x24055.0477467109634x30061.6562535136503x2.5+1x1.514.828353573x4+1x2.515.937454343x6+1x417.147575343x10+1x619.364787243x16+1x1021.8851029923x25+1x1625.411413214093x35+1x1627.813915817723x50+1x2531.117219222993x70+1x3536.723323934063x95+1x5040.827328643983x120+1x7044.731932554873x150+1x7050.036956567503x185+1x9554.442141280033x240+1x12060.1503480100453x300+1x15068.3590546125705x417.638465205x619.048586455x1021.867799205x1624.59010312765x2528.911913418715x3533.014816227425x5037.518019336645x7042.823324048665x9548.228228365345x12053.132832278365x15059.337636396705x18565.0436412117144x4+1x2.517.438464994x6+1x418.848586224x10+1x621.366798624x16+1x1024.08810311994x25+1x1628.111713317484x35+1x1631.914516025094x50+1x2536.217719133594x70+1x3541.122823844294x95+1x5046.427728158294x120+1x7051.532432072504x150+1x7056.336936186764x185+1x9562.2428408106063x4+2x2.517.238464773x6+2x418.548585953x10+2x620.865788113x16+2x1023.58710211313x25+2x1627.211613216343x35+2x1630.714215922783x50+2x2535.017619030693x70+2x3539.422423640263x95+2x5044.727227953153x120+2x7049.831931866653x150+2x7053.836535777923x185+2x9559.44204059611

注：单芯电缆铠装应采用非磁性材料或减少磁损耗的结构。表8-29高压交联聚氯乙烯绝缘阻燃电力电缆的载流量型号ZR-YJV、ZR-YJLV电压等级KV标称截面面积/mm平方参考外径/mm工作电容/(微法/km)载流量推荐值/A成品参考质量/(kg/km)空气中敷设埋地敷设铜芯铝芯铜芯铝芯铜芯铝芯6/10kv2519.70.211821422131676254653520.50.232181712682007435205021.80.262522002972369176017023.70.2930124435128611407009525.30.32344288396333141781612026.90.36376323427368166992015028/50.364023524513952004106218530.30.424313824784262362120324032.70.474674165114572929142930034.90.515074495454843545167140037.90.565714985965214533204050041.60.60635540650556564425336300.71727604727607

3x2540.00.21147114162126210816243x3542.00.23166128181140251318393x5045.20.25200155215167310821503x7049.30.30248192262203391425803x9553.70.30298232312242487830513x12056.40.31344267353274574434753x15060.00.32391303398308683039753x18563.60.34451351454352801345003x24068.80.36524409520405961950723x30073.60.385944655814541126056023x400

0.40697550665525

型号ZR-YJV22、ZR-YJLV22电压等级KV标称截面面积/mm平方参考外径/mm工作电容/(微法/km)载流量推荐值/A成品参考质量/(kg/km)空气中敷设埋地敷设铜芯铝芯铜芯铝芯铜芯铝芯6/10kv3x2544.90.21142110152118311826343x3547.20.23173134183142359929253x5050.40.25207160217168427333153x7054.70.30257199264205520738733x9558.60.30309239313243628944463x12061.80.31356276358278721449453x15065.80.32401311401311845255973x18569.60.34454355453352976262493x24074.80.365294125254091150669603x30079.90.386024705874581318175233x4000.40712561672529

8.7/153x2550.00.21145113150120361831333x3553.00.22175136177141417234973x5056.00.23211163212168494039823x7060.00.25254202256204579744643x9563.90.27314243312245689750743x12067.10.28360280347275785255833x15070.90.28403311391306913062753x18574.80.304613584513451069071833x24080.00.335404205214081256980233x30086.70.356204805874601456489683x40097.70.39719565669529

型号ZR-YJV、ZR-YJLV电压等级KV标称截面面积/mm平方参考外径/mm工作电容/(微法/km)载流量推荐值/A成品参考质量/(kg/km)空气中敷设埋地敷设铜芯铝芯铜芯铝芯铜芯铝芯8.7/152522.30.151811412111657085493523.30.162171702511978306075024.70.1825520129623310096927026.30.2230924835428412377979527.90.24358295406335151991812029.50.263953324423731788103915031.30.284283684744072131118818532.90.304614044944332494133424035.30.315084525464853070157030037.70.345524905845183695182140042.10.386235496405614798230550045.90.406996007036025839272863049.50.41799667786657

3x2544.80.21141109152118246419803x3547.60.22171132181140292322493x5050.60.23205159215167357126133x7054.40.25253196262203435030163x9558.10.27307238314243532335003x12061.30.28350272356276619539263x15064.90.28396307399309734644913x18568.80.30450350450349881252993x24073.60.335144105214051048159353x30079.00.355984685834551244064603x40089.90.36702544672528

26/355039.20.12263208280222182915127040.90.14316253334269209316539542.70.153642983803142430182812044.10.163983354133492718196915045.90.184283684413803103216018547.30.194594034684123523236324049.90.225144425034474134263330052.30.225384755374754814294040055.70.255915155975085924343150059.10.2667057166055070183907630

0.28715627711596

表8-30交联电缆导体短路电流（短路时间为1S)标准截面面积/mm平方2535507095120150185240300400500短路电流/kA导体温度°C65铜芯4.035.627.9811.1015.0019.0023.7029.1037.7047.1062.6078.30铝芯2.653.705.257.339.9012.5015.6019.2024.8031.0041.2051.5080铜芯3.855.377.6210.6014.4018.1022.6027.8036.0044.9059.8074.70铝芯2.523.525.006.979.4211.9014.8018.2023.6029.5039.2049.0090铜芯3.695.157.3110.2013.8017.4021.7026.7034.6043.1057.4071.70铝芯2.423.734.796.689.0311.4014.2017.5022.6028.2037.6047.00电缆的选型与配线选择电线平方数和电流

一般铜线安全电流最大为：2.5平方毫米铜电源线的安全载流量－－28A。4平方毫米铜电源线的安全载流量－－35A。6平方毫米铜电源线的安全载流量－－48A。10平方毫米铜电源线的安全载流量－－65A。16平方毫米铜电源线的安全载流量－－91A。25平方毫米铜电源线的安全载流量－－120A。如果是铝线截面积要取铜线的1.5-2倍。如果铜线电流小于28A，按每平方毫米10A来取肯定安全。如果铜线电流大于120A，按每平方毫米5A来取。导线的截面积所能正常通过的电流可根据其所需要导通的电流总数进行选择，一般可按照如下顺口溜进行确定：十下五,百上二,二五三五四三倍,七零九五两倍半,铜线升级算.就是10平方以下的铝线,平方毫米数乘以5就可以了,要是铜线呢,就升一个档,比如2.5平方的铜线,就按铝线4平方计算.一百以上的都是截面积乘以2,二十五平方以下的乘以4,三十五平方以上的乘以3,70和95平方都乘以2.5,这么几句口诀应该很好记吧,说明:只能作为估算,不是很准确。另外如果按室内记住电线6平方毫米以下的铜线，每平方电流不超过10A就是安全的，从这个角度讲，你可以选择1.5平方的铜线或2.5平方的铝线。10米内，导线电流密度6A/平方毫米比较合适，10-50米，3A/平方毫米,50-200米，2A/平方毫米，500米以上要小于1A/平方毫米。从这个角度，如果不是很远的情况下，你可以选择4平方铜线或者6平方铝线。如果真是距离150米供电（不说是不是高楼），一定采用4平方的铜线。导线的阻抗与其长度成正比，与其线径成反比。请在使用电源时，特别注意输入与输出导线的线材与线径问题。以防止电流过大使导线过热而造成事故。导线线径一般按如下公式计算：铜线：S=IL/54.4*U`铝线：S=IL/34*U`式中：I——导线中通过的最大电流（A）L——导线的长度（M）U`——充许的电压降（V）S——导线的截面积（MM2）说明：1、U`电压降可由整个系统中所用的设备范围内，分给系统供电用的电源电压额定值综合起来考虑选用。2、计算出来的截面积往上靠.绝缘导线载流量估算铝芯绝缘导线载流量与截面的倍数关系

导线截面(mm2)11.52.5461016253550载流是截面倍数9876543.532.5载流量(A)9142332486090100123150210238300估算口诀：二点五下乘以九，往上减一顺号走。三十五乘三点五，双双成组减点五。条件有变加折算，高温九折铜升级。穿管根数二三四，八七六折满载流。0.6/1kV单芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE1×1.01×1.51×2.51×41×61×101×161×251×351×501×701×951×1201×1501×1851×2401×3001×4001×5001×6301×8001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.728.832.56.57.016.919.020.922.825.127.930.533.937.641.946.6495669871101632273404405817961067132116051977254631483981499062857908●0.6/1k两芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE2×1.02×1.52×2.52×42×62×102×162×252×352×502×702×952×1202×1502×1852×2402×3001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.710.611.111.912.813.817.019.122.524.827.932.336.540.344.449.255.260.410512014918924136450674897112681765237229553611447356907153●0.6/1k三芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE3×1.03×1.53×2.53×43×63×103×163×253×353×503×703×953×1203×1503×1853×2403×3003×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.710.911.412.313.214.317.419.522.925.228.332.836.940.744.849.755.860.973.5162182224283357559761107413751830249932903938494162397699994212560●0.6/1kV四芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE4×1.04×1.54×2.54×44×64×104×164×254×354×504×704×954×1204×1504×1854×2404×3004×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.711.912.513.514.616.519.622.226.329.133.038.543.248.052.958.966.172.881.61451722222914115958212881699225731914291537865978228106764327316900●0.6/1kV五芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE5×1.05×1.55×2.55×45×65×105×165×255×355×505×705×955×1205×1505×1855×2405×3005×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.712.713.414.515.717.121.424.228.931.936.542.548.053.158.865.373.380.890.71692022633484637231041158120912798395453456681821210358132861615721065●0.6/1kV三加一芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE3×1.5+1×13×2.5+1×1.53×4+1×2.53×6+1×43×10+1×63×16+1×103×25+1×163×35+1×163×50+1×253×70+1×353×95+1×503×120+1×703×150+1×703×185+1×953×240+1×1203×300+1×1503×400+1×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.781.782.242.764.027.568.910.710.712.614.215.817.612.313.214.315.518.621.525.227.331.336.040.745.449.154.861.467.775.61652092663605407861209148120422856384548895719721593161156414659●0.6/1kV三加二芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE3×1.5+2×13×2.5+2×1.53×4+2×2.53×6+2×43×10+2×63×16+2×103×25+2×163×35+2×163×50+2×253×70+2×353×95+2×503×120+2×703×150+2×703×185+2×953×240+2×1203×300+2×1503×400+2×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.781.782.242.764.027.568.910.710.712.614.215.817.616.619.723.127.028.933.438.543.648.952.358.465.372.180.418923931541861791313631665230132084324558264798242106021314516044●0.6/1kV四加一芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE4×1.5+1×14×2.5+1×1.54×4+1×2.54×6+1×44×10+1×64×16+1×104×25+1×164×35+1×164×50+1×254×70+1×354×95+1×504×120+1×704×150+1×704×185+1×954×240+1×1204×300+1×1504×400+1×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.781.782.242.764.027.568.910.710.712.614.215.817.613.314.315.516.920.523.727.930.435.340.645.751.155.561.969.376.485.619525133144066997714721877257735894822614273419236119571482218837●0.6/1k两芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE232×1.52×2.52×42×62×102×162×252×352×502×702×952×1202×1502×1852×2402×3001.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.713.714.515.416.419.621.725.127.430.535.140.944.749.053.859.864.82362753243885316959721219154721043218378745475505694583860.6/1k三芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE233×1.03×1.53×2.53×43×63×103×163×253×353×503×703×953×1203×1503×1853×2403×3003×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.713.717.220.622.826.529.032.339.243.547.652.257.363.869.875.72392673163824676548761250159020413197412650316068739593941149714389●0.6/1kV四芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE234×1.04×1.54×2.54×44×64×104×164×254×354×504×704×954×1204×1504×1854×2404×3004×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.714.518.422.224.828.931.737.643.147.852.657.563.570.577.485.6272306369452560798108315652006297940285232642777429494120651483618549●0.6/1kV五芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE235×1.05×1.55×2.55×45×65×105×165×255×355×505×705×955×1205×1505×1855×2405×3005×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.715.316.017.118.319.724.026.831.534.957.763.469.977.985.496.53073484235246579461297188824643595488563947491949011655148731826523861●0.6/1kV三加一芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE233×1.5+1×13×2.5+1×1.53×4+1×2.53×6+1×43×10+1×63×16+1×103×25+1×163×35+1×163×50+1×253×70+1×353×95+1×503×120+1×703×150+1×703×185+1×953×240+1×1203×300+1×1503×400+1×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.781.782.242.764.027.568.910.710.712.614.215.817.614.915.816.527.829.933.940.645.350.053.759.466.072.180.2301357423532732100914401768234235894669580468738396106561298616280●0.6/1kV三加二芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE233×1.5+2×13×2.5+2×1.53×4+2×2.53×6+2×43×10+2×63×16+2×103×25+2×163×35+2×163×50+2×253×70+2×353×95+2×503×120+2×703×150+2×703×185+2×953×240+2×1203×300+2×1503×400+2×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.781.782.242.764.027.568.910.710.712.614.215.817.615.716.717.819.222.325.729.631.536.042.948.253.556.963.069.976.785.0332393484605823115716511974266640325277665176189508120161469719372●0.6/1kV四加一芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径

mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE234×1.5+1×14×2.5+1×1.54×4+1×2.54×6+1×44×10+1×64×16+1×104×25+1×164×35+1×164×50+1×254×70+1×354×95+1×504×120+1×704×150+1×704×185+1×954×240+1×1204×300+1×1504×400+1×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.781.782.242.764.027.568.910.710.712.614.215.817.615.916.918.119.523.126.530.533.239.945.050.355.760.166.573.981.090.23404085046308841227177022183353445658227256854910577134381647620684常用电工计算口诀第一章按功率计算电流的口诀之一1.用途：这是根据用电设备的功率(千瓦或千伏安)算出电流(安)的口诀。电流的大小直接与功率有关,也与电压,相别,力率(又称功率因数)等有关。一般有公式可供计算,由于工厂常用的都是380/220伏三相四线系统,因此,可以根据功率的大小直接算出电流。2.口诀：低压380/220伏系统每KW的电流,安。千瓦，电流，如何计算？电力加倍，电热加半。单相千瓦，4.5安。单相380，电流两安半。3.说明:口诀是以380/220V三相四线系统中的三相设备为准,计算每千瓦的安数。对于某些单相或电压不同的单相设备,其每千瓦的安数.口诀中另外作了说明。①这两句口诀中,电力专指电动机.在380V三相时(力率0.8左右),电动机每千瓦的电流约为2安.即将“千瓦数加一倍”(乘2)就是电流,安。这电流也称电动机的额定电流.【例1】5.5千瓦电动机按“电力加倍”算得电流为11安。【例2】40千瓦水泵电动机按“电力加倍”算得电流为80安。电热是指用电阻加热的电阻炉等。三相380伏的电热设备,每千瓦的电流为1.5安.即将“千瓦数加一半”(乘1.5)，就是电流,安。【例1】3千瓦电加热器按“电热加半”算得电流为4.5安。【例2】15千瓦电阻炉按“电热加半”算得电流为23安。这口诀并不专指电热,对于照明也适用.虽然照明的灯泡是单相而不是三相,但对照明供电的三相四线干线仍属三相。只要三相大体平衡也可以这样计算。此外,以千伏安为单位的电器(如变压器或整流器)和以千乏为单位的移相电容器(提高力率用)也都适用。即是说,这后半句虽然说的是电热,但包括所有以千伏安、千乏为单位的用电设备,以及以千瓦为单位的电热和照明设备。【例1】12千瓦的三相(平衡时)照明干线按“电热加半”算得电流为18安。【例2】30千伏安的整流器按“电热加半”算得电流为45安。(指380伏三相交流侧)【例3】320千伏安的配电变压器按“电热加半”算得电流为480安（指380/220伏低压侧)。【例4】100千乏的移相电容器(380伏三相)按“电热加半”算得电流为150安。②.在380/220伏三相四线系统中,单相设备的两条线,一条接相线而另一条接零线的(如照明设备)为单相220伏用电设备。这种设备的力率大多为1,因此,口诀便直接说明“单相(每)千瓦4.5安”。计算时,只要“将千瓦数乘4.5”就是电流,安。同上面一样,它适用于所有以千伏安为单位的单相220伏用电设备,以及以千瓦为单位的电热及照明设备,而且也适用于220伏的直流。【例1】500伏安(0.5千伏安)的行灯变压器(220伏电源侧)按“单相(每)千瓦4.5安”算得电流为2.3安。【例2】1000瓦投光灯按“单相千瓦、4.5安”算得电流为4.5安。对于电压更低的单相,口诀中没有提到。可以取220伏为标准,看电压降低多少,电流就反过来增大多少。比如36伏电压,以220伏为标准来说，它降低到1/6,电流就应增大到6倍,即每千瓦的电流为6×4.5=27安。比如36伏,60瓦的行灯每只电流为0.06×27=1.6安,5只便共有8安。③在380/220伏三相四线系统中,单相设备的两条线都接到相线上,习惯上称为单相380伏用电设备(实际是接在两条相线上)。这种设备当以千瓦为单位时,力率大多为1,口诀也直接说明:“单相380,电流两安半”。它也包括以千伏安为单位的380伏单相设备。计算时,只要“将千瓦或千伏安数乘2.5就是电流,安。【例l】32千瓦钼丝电阻炉接单相380伏,按电流两安半算得电流为80安。【例2】2千伏安的行灯变压器,初级接单相380伏,按电流两安半算得电流为5安。【例3】21千伏安的交流电焊变压器,初级接单相380伏,按电流两安半算得电流为53安。注1：按“电力加倍”计算电流，与电动机铭牌上的电流有的有些误差，一般千瓦数较大的，算得的电流比铭牌上的略大些，而千瓦数较小的，算得的电流则比铭牌上的略小些，此外，还有一些影响电流大小的因素，不过，作为估算，影响并不大。注2：计算电流时，当电流达十多安或几十安心上，则不必算到小数点以后，可以四舍五入成整数。这样既简单又不影响实用，对于较小的电流也只要算到一位小数和即可。第二章导体载流量的计算口诀1.用途：各种导线的载流量(安全电流)通常可以从手册中查找。但利用口诀再配合一些简单的心算,便可直接算出,不必查表。导线的载流量与导线的载面有关,也与导线的材料(铝或铜),型号(绝缘线或裸线等),敷设方法(明敷或穿管等)以及环境温度(25度左右或更大)等有关,影响的因素较多,计算也较复杂。10下五，100上二。25，35，四三界。70，95，两倍半。穿管温度，八九折。裸线加一半。铜线升级算。3.说明：口诀是以铝芯绝缘线,明敷在环境温度25度的条件为准。若条件不同,口诀另有说明。绝缘线包括各种型号的橡皮绝缘线或塑料绝缘线。口诀对各种截面的载流量(电流,安)不是直接指出,而是“用截面乘上一定的倍数”,来表示。为此,应当先熟悉导线截面,(平方毫米)的排列11.52.54610162535507O95l20150185......生产厂制造铝芯绝缘