a. 第1种实芯导体20℃导体电阻值:
标称截面积/mm2 | 20℃时导体直流电阻最大值(Ω/km) | 圆形退火铜导体 | 铝导体和铝合金导体,圆形或成型 | 不镀金属 | 镀金属 | 0.5 | 36.0 | 36.7 | - | 0.75 | 24.5 | 24.8 | - | 1 | 18.1 | 18.2 | - | 1.5 | 12.1 | 12.2 | - | 2.5 | 7.41 | 7.56 | - | 4 | 4.61 | 4.70 | - | 6 | 3.08 | 3.11 | - | 10 | 1.83 | 1.84 | - | 16 | 1.15 | 1.16 | - | 因第1种实芯导体日常最多涉及以上规格,故16mm2以上规格不再表述,如有需要可查GB/T3956 |
b.第2种绞合导体最少根数及20℃导体电阻值:
标称截面积/mm2 | 导体的最少单线根数 | 20℃时导体最大电阻(Ω/km) | 圆形 | 紧压圆形 | 成形 | 退火铜导体 | 铝或铝合金导体 | 铜 | 铝 | 铜 | 铝 | 铜 | 铝 | 不镀金属 | 镀金属 | 0.5 | 7 | — | — | — | — | — | 36.0 | 36.7 | — | 0.75 | 7 | — | — | — | — | — | 24.5 | 24.8 | — | 1.0 | 7 | — | — | — | — | — | 18.1 | 18.2 | — | 1.5 | 7 | — | 6 | — | — | — | 12.1 | 12.2 | — | 2.5 | 7 | — | 6 | — | — | — | 7.41 | 7.56 | — | 4 | 7 | — | 6 | — | — | — | 4.61 | 4.70 | — | 6 | 7 | — | 6 | — | — | — | 3.08 | 3.11 | — | 10 | 7 | 7 | 6 | 6 | — | — | 1.83 | 1.84 | 3.08 | 16 | 7 | 7 | 6 | 6 | — | — | 1.15 | 1.16 | 1.91 | 25 | 7 | 7 | 6 | 6 | 6 | 6 | 0.727 | 0.734 | 1.20 | 35 | 7 | 7 | 6 | 6 | 6 | 6 | 0.524 | 0.529 | 0.868 | 50 | 19 | 19 | 6 | 6 | 6 | 6 | 0.387 | 0.391 | 0.641 | 70 | 19 | 19 | 12 | 12 | 12 | 12 | 0.268 | 0.27 | 0.443 | 95 | 19 | 19 | 15 | 15 | 15 | 15 | 0.193 | 0.195 | 0.320 | 120 | 37 | 37 | 18 | 15 | 18 | 15 | 0.153 | 0.154 | 0.253 | 150 | 37 | 37 | 18 | 15 | 18 | 15 | 0.124 | 0.126 | 0.206 | 185 | 37 | 37 | 30 | 30 | 30 | 30 | 0.0991 | 0.100 | 0.164 | 240 | 37 | 37 | 34 | 34 | 34 | 30 | 0.0754 | 0.0762 | 0.125 | 300 | 61 | 61 | 34 | 34 | 34 | 30 | 0.0601 | 0.0607 | 0.100 | 400 | 61 | 61 | 53 | 53 | 53 | 53 | 0.0470 | 0.0475 | 0.0778 | 500 | 61 | 61 | 53 | 53 | 53 | 53 | 0.0366 | 0.0369 | 0.0605 | 630 | 91 | 91 | 53 | 53 | 53 | 53 | 0.0283 | 0.0286 | 0.0469 | 800 | 91 | 91 | 53 | 53 | — | — | 0.0221 | 0.0224 | 0.0367 | 1000 | 91 | 91 | 53 | 53 | — | — | 0.0176 | 0.0177 | 0.0291 |
c.第5种绞合导体最小单丝直径及20℃导体电阻值:
标称截面积/mm2 | 导体内最大单线直径/mm | 20℃时导体最大电阻(Ω/km) | 不镀金属单线 | 镀金属单线 | 0.5 | 0.21 | 39.0 | 40.1 | 0.75 | 0.21 | 26.0 | 26.7 | 1 | 0.21 | 19.5 | 20.0 | 1.5 | 0.26 | 13.3 | 13.7 | 2.5 | 0.26 | 7.98 | 8.21 | 4 | 0.31 | 4.95 | 5.09 | 6 | 0.31 | 3.30 | 3.39 | 10 | 0.41 | 1.91 | 1.95 | 16 | 0.41 | 1.21 | 1.24 | 25 | 0.41 | 0.78 | 0.795 | 35 | 0.41 | 0.554 | 0.565 | 50 | 0.41 | 0.386 | 0.393 | 70 | 0.51 | 0.272 | 0.277 | 95 | 0.51 | 0.206 | 0.21 | 120 | 0.51 | 0.161 | 0.164 | 150 | 0.51 | 0.129 | 0.132 | 185 | 0.51 | 0.106 | 0.108 | 240 | 0.51 | 0.0801 | 0.0817 | 300 | 0.51 | 0.0641 | 0.0654 | 400 | 0.51 | 0.0486 | 0.0495 | 500 | 0.61 | 0.0384 | 0.0391 | 630 | 0.61 | 0.0287 | 0.0292 |
d.第6种绞合导体最小单丝直径及20℃导体电阻值: 标称截面积/mm2 | 导体内最大单线直径/mm | 20℃时导体最大电阻(Ω/km) | 不镀金属单线 | 镀金属单线 | 0.5 | 0.16 | 39.0 | 40.1 | 0.75 | 0.16 | 26.0 | 26.7 | 1 | 0.16 | 19.5 | 20.0 | 1.5 | 0.16 | 13.3 | 13.7 | 2.5 | 0.16 | 7.98 | 8.21 | 4 | 0.16 | 4.95 | 5.09 | 6 | 0.21 | 3.30 | 3.39 | 10 | 0.21 | 1.91 | 1.95 | 16 | 0.21 | 1.21 | 1.24 | 25 | 0.21 | 0.78 | 0.795 | 35 | 0.21 | 0.554 | 0.565 | 50 | 0.41 | 0.386 | 0.393 | 70 | 0.41 | 0.272 | 0.277 | 95 | 0.41 | 0.206 | 0.21 | 120 | 0.41 | 0.161 | 0.164 | 150 | 0.41 | 0.129 | 0.132 | 185 | 0.41 | 0.106 | 0.108 | 240 | 0.41 | 0.0801 | 0.0817 | 300 | 0.41 | 0.0641 | 0.0654 |
e.温度换算系数:
1 | 2 | 1 | 2 | 测量时导体温度t/℃ | 校正系数k1对所有导体 | 测量时导体温度t/℃ | 校正系数k1对所有导体 | 0 | 1.087 | 21 | 0.996 | 1 | 1.082 | 22 | 0.992 | 2 | 1.078 | 23 | 0.988 | 3 | 1.073 | 24 | 0.984 | 4 | 1.068 | 25 | 0.98 | 5 | 1.064 | 26 | 0.977 | 6 | 1.059 | 27 | 0.973 | 7 | 1.055 | 28 | 0.969 | 8 | 1.050 | 29 | 0.965 | 9 | 1.046 | 30 | 0.962 | 10 | 1.042 | 31 | 0.958 | 11 | 1.037 | 32 | 0.954 | 12 | 1.033 | 33 | 0.951 | 13 | 1.029 | 34 | 0.947 | 14 | 1.025 | 35 | 0.943 | 15 | 1.020 | 36 | 0.94 | 16 | 1.016 | 37 | 0.936 | 17 | 1.012 | 38 | 0.933 | 18 | 1.008 | 39 | 0.929 | 19 | 1.004 | 40 | 0.926 | 20 | 1.000 |
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