外壳具备绝缘防护和提供集电器行走轨道的双重作用。
| 相数 | 型号 | 截面积mm2 | 额定载流量A | 电阻Ω/km | 阻抗Ω/km | 质量kg/m |
| 四 | DHG-4-10 | 10 | 50 | 1.912 | 1.921 | 2.25 |
| DHG-4-15 | 15 | 80 | 1.195 | 1.204 | 2.40 | |
| DHG-4-25 | 25 | 125 | 0.765 | 0.781 | 2.65 | |
| DHG-4-35 | 35 | 140 | 0.546 | 0.568 | 2.95 | |
| DHG-4-50 | 50 | 170 | 0.382 | 0.411 | 3.50 | |
| DHG-4-70 | 70 | 210 | 0.273 | 0.310 | 4.13 | |
| 五 | DHG-5-15 | 15 | 80 | 1.195 | 1.205 | 2.79 |
| DHG-5-25 | 25 | 125 | 0.765 | 0.780 | 3.22 | |
| DHG-5-35 | 35 | 140 | 0.546 | 0.567 | 3.63 | |
| DHG-5-50 | 50 | 170 | 0.382 | 0.410 | 4.30 | |
| DHG-5-70 | 70 | 210 | 0.273 | 0.310 | 5.10 | |
| 六 | DHG-6-10 | 10 | 50 | 1.912 | 1.921 | 2.33 |
| DHG-6-35 | 35 | 140 | 0.546 | 0.572 | 6.24 | |
| DHG-6-50 | 50 | 170 | 0.382 | 0.417 | 7.02 | |
| DHG-6-70 | 70 | 210 | 0.273 | 0.318 | 8.07 | |
| 七 | DHG-7-10 | 10 | 50 | 1.912 | 1.921 | 2.40 |
| DHG-7-35 | 35 | 140 | 0.546 | 0.571 | 6.56 | |
| 八 | DHG-8-10 | 10 | 50 | 1.912 | 1.948 | 3.16 |
| DHG-8-15 | 15 | 80 | 1.195 | 1.254 | 3.55 | |
| DHG-8-25 | 25 | 125 | 0.765 | 0.867 | 4.21 |