电缆截面载流量对照表格

电缆截面载流量对照表序号洞电线型号单心载疣量t25nC)0)电压降mv/fil品字型电压隆蜓按一字型电压降mv/M间距一字型电压降mv/fil两心我流量C25-C)a)电压降nw/M三业载疣量C25=C3a)电压降nv/M四柱载流量025nC0)电压降mv/Ma.^50.850.7msYJYEEYYZ27JVZ2YJVZ2W2ZYJYZ211.5mm2/c202530.5626.7326.7326.T3161613IS30.S6131330.S622.Brrim2/c2S35IS.91S.9IS.9IS.92335is.9IS2218.9IS30IS.934nim乂/c305011.7611.7B11.7611.T&294511.7S243211.762E3211.7S4Grrirri2/c43&07.SBT.867.SB7.8&3SE87.SB32417.8633427.865lOmrTi2Zc&5054.674.044.044.0553B24.&T455E4.&747564.676lEmm2/c881102.952.552.562.55721112.961752.&65802.6T25mm2/c1131571.8T1.621.621.B3971451.9851051.&861081.6835mm2/c1421921.351.IT1.LT1.191201801.31051301.Z1081301.2950mm2/c1T1Z321.010.870.880.914022011241550.8T137165□.8710TOmni2/c£18£940.71aci0.620.651802850.T1602050.&1176220□.61112/c£653550.5£a.450.450.52503500.522012480.45217265□.4512120mm2/c3054100.430.370.3S0.422704250.42235驱C.362533100.3613ISOmm2Jc35547S0.3B0.320.330.373104850.35275343C.3曲Ci3600.314185rTirn2丿c4105500.30.2S0.230.333B0ESO0.293234000.25333415□.251524LlrrirTi2./c490&600.25a.220.240.294306500.243814S00.21400495□.2116BClUnini2y1c5G07500.22a.20.210.285007000.214405400.19467530□.1917400riim2/c&50S800.2a.it0.20.2&6008200.1918500mm2/c75010000.19a.is0.180.2519530mm2/c38011000.18a.is0.LT0.2520300mm2/c110013000.ITa.is0.170.2421lOOQmm2/=130QK0Q0.1&J.140.1600序号胡电线型号单心我蹄量(25BC)(A〕电压降mv/fil品宁型电压降mv/閘紧按一字型电压降mv/M司距一字型电压降mv.r1M两怙載流量(25BC)(A)电压降fTlV/'fl三心载流量电压降(25bC)(A)my/M四怙载流量电压降(25BC(A.)mv/M0.^50.850.7WTJVY¥IJVwrjvWYJV11.Snim2/'c202530.SB26.732B.732C.73161613IS30.SB131330.se22.EfTim2.i1'c2B3518.9is.gIB.9le.g233518.9IS2218.gIB30IB.934mni2Jc3B5011.7611.7611.7611.T&343B11.76233411.762B4011.7641mmZ/c48B0T.8&T.8BT.86T.8&4055T.8&3240T8635557.86510mm2/c65854.6T4.044.044.0555754.6T45554.6748804.&7616mm2/c901102.952.552.562.55701082.960752.665652.&T25mm2/c1151501.8T1.621.621.631001401.93010016661051.&835mm2/c145ISO1.351.171.171.1?1251751.31051301.21Q813Q1.2950mm2/c1702301.Q10.670.S30.91452101ISO1600.3713S1650.37TlJnini2/c2202850.710610.B20.651902650.7L&52:1C0.611752100.Bl1195rim2?c2B03500.52a.450.450.52303300.522002600.4E2202B00.4512120rrifTi2.i'1c3004100.43a.370.330.422704100.422353000.362553000.3B13ISOirih2/c3504800.3&a.320.330.3T3104700.352T5350□.33403B00.314185mm2/c4105400.3a.260.280.333605700.29320410□.254004150.Z515Z40mm2fc4806400.25a.220.240.294306500.24390485□.214704950.Z11&300mm2/c5607400.22a.20.210.285007000.214505600.135005800.19IT^OOmm2Zc65JS300.2J.ITO.E0.2&6DQ船00.1918^IJIJnim2/c75010000.19Q.150.IS0.2519E-30rrifTi2y1cBBO11000.18a.is0.170.2520ESUOnini2.i'1c110013000.ITa.is0.170.2421lODOmm2/cl30014000.1&a.140.160.24电线电缆截流量的速算法在供配电系统中，电线电缆的作用是传输电流，联络供电点(变电所或配电箱)与用电设备之间的桥梁.正确选择电线电缆是保证负载可靠运行的重要环节•若选择电线电缆的截面积过小而负荷电流超载运行时，则会引起电线电缆表面温升加快,使绝缘层过热，导致事故的发生•若选择电线电缆的截面积过大，则会造成浪费,使投资增加.电线电缆的栽流量取决于本身的构造形式，周围环境条件和敷设方式.电线电缆从材质上分为铜芯线和铝芯线,从绝缘上分为橡皮绝缘，塑料绝缘，塑料护套及铠装等形式•其敷设方式有明设和暗设(穿金属管或塑料管)•可见电线电缆的载流量,除自身条件外，还要随外界条件的变化而改变：当环境温度升高时，载流量要减少；暗敷设比明敷设的载流量要降低;多根共管敷设时，根数越多，载流量越小；而相同截面积的铝线要比铜线的载流量小一级,等等.在配电设计和施工中，如何快速检验电线电缆截面积能否满足计算负荷电流的要求，采用速算法可做到心中有数，有错必纠，避免返工和事故的发生.本文介绍截面积1.5〜185mm2的电线电缆速算法.1•速算法速算法是以计算标称截面积的载流量为基础的.速算表达公式为IN二K1K2K3K4aS式中：IN——电线电缆的速算载流量,A；S线缆标称截面积,mm2；a——速算电流系数，见附表,A/mm2；K1——温升折算系数，环境温度为25°C时,K1为1,当超过30°C时，九折；K2——导线折算系数，铜线K2为1,塑料铝线九五折；K3管质折算系数，穿钢管K3为1,穿塑料管八五折.因穿塑料管后，散热差，故需打折；K4——穿线共管折算系数，明敷设K4为1,穿2,3根七五折,4根共管为六折.截面积S(mm2)185,150120,95705035251610642.51.5电流系数a(A/mm2)33.544.5567891014182.举例［例1］已知橡皮绝缘铜线50mm2;架空进户，环境温度为25°C,求其载流量•若改用塑料铝线时，载流量又为多少解:(1)橡皮绝缘铜线:a二4.5,K1=K2=K3=K4=1.则IN二4.5X50=225(A)查手册，橡皮绝缘铜线的载流量为230A.(2)塑料铝线：若改用塑料铝线,K2二0.95，其 计算公式 六西格玛计算公式下载结构力学静力计算公式下载重复性计算公式下载六西格玛计算公式下载年假计算公式 为IN，0.95IN二0.95X225二214(A)查手册，塑料绝缘50mm2铝电线的载流量为215A.［例2］上题中环境温度为30°C,架空进户，求其载流量;从横担引入室配电箱穿钢管保护,这时电线的载流量又为多少如果改用橡皮铝芯线，其截面积应为多少解:⑴环境温度为30°C:K1二0.9，则IN，0.9X225二202.5(A)查手册，环境温度为30°C时，载流量为215A.4根钢管保护:K4=0.6,折算电流为IN〃二0.6X225二135(A)查手册,4根电线穿钢管时，载流量为137A.改用铝芯橡皮线：若要使其载流量保持不变，则橡皮铝芯线应比铜线大一级，选70mm2即可.就看看服号皇旳狙号w室齐TIU$0U也7&E.GJ-3517bTJ6LJdK1肿jLGJ-5a220T卜过IJ】沾ELOLG|.?&洛TJ-U伽FJ^5IM135!⑷卜箱林T卜25CJ-弭215170|lGM2D390TJ-35220175LJ-70Z65S15IlgI-JM]!J45TJ-弭濒綁Lj-55測缈51SLJ-1K310g-伽血H-701J-1SCUO370■LG]-,WT斶3Wu-m425g-他TJ-JJD405[J^o6?QTJJ505703IJ-3-Oflgj-歸TJ-181150u-miLGjS-iD力吒W77CI1I.GJ-5W1倾ij-mIJ-625114«畑t&3SLGJ-iftO8S-0«ttS*224乙烟■心软歧及第心垓的70C杂件下，空气稅空敌设的負乩・・庄设卄难用时.对手1・0列川以下的尔徽他・ewB4*«电賂压降和机械張度.不同环MX.时的«*»£««环坍澄度/C51015202550354045SiE««t1-21.1$1.1!1.0510.940・抄0.810.74*2-25BVVff^DBL^型聚11乙删6锋、豪飢乙心及铝心#«#I323S962972401-448336注」裘中安全載SL量•线芯墳高工作用度为馳亡”地温为购C*蛊实际龟視不星的地靑，电S!的赛全应乘8TF舉中的RiES数。»a/c1015!2025303540K正礙數n14ji.nLOS].00a95o.购2-«乘电崑平荷戟设］电続外皮阿距为200mm）时*电轨的安金载St麓应柔以下表中的井列奈数，亀轨系数12345■&1器井列慕裱HOOth920-«70驯0-8210.510®引用加为好友发送留丁咚：言2006-12-2321:16:00豪2301千伏VV.乙簿嚴乙旳腿毎亀奴安金仪流■<«ft：A)截为/mnr葷若二芯三艺W芯MS铝芯铝芯購芯伯茜■芯<82]1815121.52X19162・5322426A22!644]3】35262922292265441443438293829107255604652405140169774796169S368532512210210783937292713516212495IB87115895020415715$120140IO&14411170253195196)51»?513517813495Z7Z21423&1822H16$218168120356276273ill2471913$2195150410316315242293225297ZZ«U54653583S225734126324055242$3963O&3006364904007575895008跖680$201025787&0Q133S934注.*・J»K允许■度65C.空7中■盘•环壇■厦25C•Hm1千伏VVW.5V29、w畑VLVJfr.VVSft.VLV50.V叽VL0型總奘it乙•电壊安全載at■（覃位三a＞9ft/mm:r芯三Zra芯"芯佬芯别芯铝芯剖芯侣芯"芯憎芯43627312330236153SS930393010765860465240524«161W778162nS47054?513510410681怖739473$51611Z6128998811992$Q20515815Q128H111114?31570253195197IS2179184UI9531123S2"18$21716722$“4Utt350叭27^2I&252IW260曲l$04!0$163192“2*92血$012311854663593332S734526624QS53血3923006-321864W7旗$87$90晴2677625心2押9800120*531注J】•甘我量离允许盘度6SCr空气中«»＜环嘴淞度25C,2.草芯电装电規不用于交«««＞裂列为血濾t2-32金(«.fg)ttmi：OOftfiS/mm厳丸允怖电流/A/mm■大九许电涼/A«叫«»eS613511>51653542<17170皿186354M82051W19伯5S3010280215207355701336S2&0217906101444534522840650154953匆251005780注，叢中量大允许电浚・为70C.删用空气41厦为押C・如果实际空气《1攻不是33C.金K«l粳的敷MIS*以下炭中的校正累敦・周厦空弋赳度/C510115202530枚正豪數1.3613111.2$LZO1.131.07幅厲空代unr/e3S401,05S&正簾数1.000・930.850.760・&6«2J3尊线量髙允详廻度i殆境潟廈々/U/1/C一50+5+10+15420+701291.24L21.1SLIS1.05+902.141.9S1.141.111.071.04导拔■翦允许風度+25+30+35+4G+45+50+7010.940,880⑻0.740.67+901G.960・帥5貼0.$30・79<2-35Wftft大软迭便育和微閒逸择年最大负術址讲电海唐度j-/