不同环境温度下电缆载流量修正系数.doc

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1、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）101520253035404550501.701.621.521.421.321.221.000.75-601.581.501.411.321.221.111.000.860.73651.481.411.341.261.181.091.000.890.77701.411.351.291.221.151.081.000.910.81801.321.271.221.171.111.061.000.930.86901.261.221.181.141.091.04

2、1.000.940.89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.

3、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)0.81.01.21.51.82.0.53.0　1　　35及以下50~120150~300400及以上1.061.000.950.890.840.810.750.711.081.000.940.870.800.770.700.651.081.000.930.8

4、60.790.760.690.641.091.000.930.850.790.760.680.63　10　　35及以下50~120150~300400及以上1.051.000.950.900.840.820.760.701.061.000.940.880.820.800.730.681.071.000.940.870.810.780.710.661.071.000.930.870.810.770.710.65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

5、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

6、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=7001.001.00700

7、0.760.690.620.60220~250mm-0.770.720.680.67环境温度修正系数导体温度环境温度（空气中）环境温度（土壤中）101520253035404550101520253035501.701.621.521.421.321.221.000.75-1.261.181.101.000.890.77601.581.501.411.321.221.111.000.890.731.201.131.071.000.930.85651.481.411.341.261.181.091.000.890.771.171.1

8、21.061.000.940.87701.411.351.291.221.151.081.000.910.811.151.111.051.000.940.88801.321.271.221.171.111.061.000.930.861.131.0