钢芯铝绞线长期允许的载流量

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1、钢芯铝绞线长期允许的载流量标称截面积（ｍｍ２）计算载流量（A）标称截面积（ｍｍ２）计算载流量（A）＋70℃＋80℃＋90℃＋70℃＋80℃＋90℃10/216/325/435/66685111134781001311588711314918050/850/3016116619119521821870/1070/4019419623223026625795/1595/2095/55252233230306277270351319301120/7120/20120/25120/7028728526525835034831530140139936533

2、5150/8150/20150/25150/35323326331331395400407407454461469469185/10185/25185/30185/45372379373379458468460469528540531541210/10210/25210/35210/50397405409409490501507507565579586586240/30240/40240/55445440445552546554639633641300/15300/20300/25300/40300/50300/70495502505503504

3、512615624628628629641711722726728730745400/20400/25400/35400/50400/65400/95595584583592597608746730729741752767864845844857876895500/35500/45500/65670664676842834850977967983630/45630/55630/80763775774964979977112011361131800/55800/70800/10088788487811261121111313101301128814

4、00/100127215631808注1：最高允许温度分+70℃、+80℃、+90℃三种。注2：环境温度+40℃，日照1000W/m2，风速0.5m/s辐射散热系数与吸热系数为0.9条件计算的。裸导体载流量在不同海拔高度及环境温度下的综合校正系数导体最高允许温度（℃）适应范围海拔高度（ｍ）实际环境温度（℃）＋20＋25＋30＋35＋40＋45＋50＋70屋内矩形、槽形、管形导体和不计日照的屋外软导线 1.051.000.940.880.810.740.67＋80计及日照时屋外软导线1000及以下1.051.000.950.890.830.760.

5、6920001.010.960.910.850.79  30000.970.920.870.810.75  40000.930.890.840.770.71  计及日照时屋外管形导体1000及以下1.051.000.940.870.800.720.6320001.000.940.880.810.74  30000.950.900.840.760.69  40000.910.860.800.720.65  导线经济电流密度表                                         单位:A/mm2导 线 材 料最 大 负 荷

6、 年 利 用 小 时3000以下3000～50005000以上铝     线铜      线1.1~1.22.4~2.51.0~1.12.3~2.40.9~1.02.2~2.3用经济电流密度选择导线截面的公式是：式中S——导线截面mm2P——送电负荷kWUH——线路额定电压kVcosø——功率因数j——经济电流密度A／mm21．型号及规格标称截面mm2结构根数/直径n/mm计算截面（mm2）外径mm直流电阻不大于D.C.欧／km)计算拉断力KNkg/km交货长度不小于ｍ铝钢铝钢总计10/26/1.501/1.5010.61.7712.374.50

7、2.7064.1242.9300016/36/1.851/1.8516.32.6918.825.551.7796.1365.2300025/46/2.321/2.3225.364.2329.596.961.1319.29102.6300035/66/2.721/2.7234.865.8140.678.160.823012.63141.0300050/86/3.201/3.2048.258.0456.299.600.594616.87195.1200050/3012/2.327/2.3250.7329.5980.3211.600.569242.62

8、372.0300070/106/3.801/3.8068.0511.3479.3911.400.421723.39275.2200070