扇形线芯的结构和重量计算
1.扇形线芯有两芯180°、三芯120°和四芯3*100°+1*60°
线芯高度与相当圆直径的关系
表8
标称 截面 mm2 | 计算截面mm2 | 半圆及扇形线芯 高度h(mm) | 线芯相当圆直径 mm2 | 绝缘后半圆及扇形线芯高度h(mm) | ||||
半圆 2芯 180° | 扇形 3芯、120° | 扇形 3+1芯 100° | 半圆 2芯 180° | 扇形 3芯、120° | 扇形 3+1芯 100° | |||
25 | 24.2 | 4.2 | 4.9 | 5.7 | 6.68 | 4.2+2t | 4.9+2.155t | 5.7+2.31t |
35 | 34 | 5.0 | 5.8 5.9 | 6.5 6.6 | 7.97 | 5.0+2t | 5.8+2.155t 5.9+2.155t | 6.5+2.31t 6.6+2.31t |
50 | 48.4 | 6.0 | 7.0 7.1 | 7.9 | 9.54 | 6.0+2t | 7.0+2.155t 7.1+2.155t | 7.9+2.31t |
70 | 67.8 | 7.2 | 8.5 | 9.3 9.4 | 11.15 | 7.2+2t | 8.5+2.155t | 9.3+2.31t 9.4+2.31t |
95 | 92 | 8.5 | 9.8 9.9 | 11.3 | 13.05 | 8.5+2t | 9.8+2.155t 9.9+2.155t | 11.3+2.31t |
120 | 116.5 | 9.6 | 11.2 | 12.3 | 14.64 | 9.6+2t | 11.2+2.155t | 12.3+2.31t |
150 | 145.2 | 10.7 | 12.8 | 13.7 | 16.55 | 10.7+2t | 12.8+2.155t | 13.7+2.31t |
185 | 179.5 | 14.2 14.3 | 15.1 | 18.45 | 14.2+2.115t 14.3+2.155t | 15.1+2.31t | ||
240 | 233 | 16.2 | 21.00 | 16.2+2.155t |
注:t—绝缘厚度 毫米
2.扇形线芯重量计算:
绞线 W=F*r*N*η*K1m*K2m (kg/km)
独根扇形线 W= F*r*N* K2m (kg/km)
(符号同紧压圆形线芯)