不同环境温度下载流量修正系数导体工作温度（ºC）环境温度（ºC）（空气中）101520253035404550501.701.621.521.421.321.221.000.75-601.581.501.411.321.221.111.000.860.73651.481.411.341.261.181.091.000.890.77701.411.351.291.221.151.081.000.910.81801.321.271.221.171.111.061.000.930.86901.261.221.181.141.091.041.000.940.89不同环境温度下载流量修正系数导体工作温度（ºC）环境温度（ºC）（土壤中）101520253035501.261.181.101.000.890.77601.201.131.071.000.930.85651.171.121.061.000.940.88701.151.111.051.000.940.88801.131.091.041.000.950.90901.111.071.041.000.960.92电缆在空气中并列敷设时载流量修正系数根数载流量修正系数1236468912S=1d1.000.900.850.800.820.80---S=2d1.000.980.900.950.900.850.800.80S=3d1.001.000.980.980.980.900.850.85不同土壤热阻系数的载流量修正系数电压（KV）截面范围（mm2）土壤热阻系数ρT=(ºC-M/W)0.81.01.21.51.82.0.53.0135及以下50~120150~300400及以上1.061.000.950.890.840.810.750.711.081.000.940.870.800.770.700.651.081.000.930.860.790.760.690.641.091.000.930.850.790.760.680.6335及以下1.01.00.90.90.80.80.70.71050~120150~300400及以上505042601.061.000.940.880.820.800.730.681.071.000.940.870.810.780.710.661.071.000.930.870.810.770.710.65电线电缆穿管敷设于空气中载流量修正系数（参考值）穿管根数修正系数2~40.805~80.609~120.5012以上0.45注：1、穿管电缆根数系指有负荷且发热的导线根数。中性线或保护线可不计。2、一般情况下，穿管根数体积占管内体积的40%左右。3、当管子并列敷设时乘以0.95的修正系数。三芯或三个单芯电缆平行成组直埋于土壤中载流量修正系数（参考值）电缆间距组数23456相互接触70~100(mm)220~250(mm)0.790.6690.630.580.550.850.750.680.640.600.870.970.750.720.69电缆在桥架上无间距配置多层并列时持续载流量的校正系数叠置电缆层数水平排列1234梯架0.800.660.550.50托盘0.700.550.500.45不同埋地深度时载流量修正系数电压（KV）深度L（mm）修正系数L=7001.001.0070012修正系数0.800.600.500.45桥架修正系数叠置层数1234梯架0.800.650.550.50托盘0.700.550.500.45BV、BLV型绝缘线穿半硬塑料管、波纹管管径选择单位：mm导线截面（mm2）导线根数234567891011121.01.51620252.52532420625324010324050162540506335505063709563120注:半硬塑料管、波纹管的公称管径指外径。BV、BLV型绝缘线穿电线管管径选择单位：mm导线截面（mm2）导线根数234567891011121.0191.51619252.51941962532381038511632382538516435505164767095647612015018576注:1.电线管的管径指外径。2.电线管规格根据GB3640-83。BV、BLV型绝缘线穿钢管管径选择单位：mm导线截面（mm2）导线根数234567891011121.01.515202.546202510253240162540253240503550504065705065658095120658010015080185240100注:1.钢管的管径指内径。2.钢管规格根据GB3092-82《低压流体输送用焊接钢管》。BV、BLV型绝缘线穿硬塑料管（轻型）管径选择单位：mm导线截面（mm2）导线根数234567891011121....
