| 土壤电阻率ρ (Ω·m) |
≤100 |
100~500 |
500~1000 |
1000~2000 |
≥2000 |
| 接地电阻规程值(Ω) |
10 |
15 |
20 |
25 |
30 |
| 110 kV耐雷水平(kA) |
70 |
46 |
35 |
28 |
23.3 |
| (与设计值70 kA比值) |
100% |
65.70% |
50% |
40% |
33.30% |
| 220 kV耐雷水平(kA) |
120 |
80 |
60 |
48 |
40 |
| (与设计值90 kA比值) |
133% |
88.90% |
66.70% |
53.30% |
44.40% |
| 500 kV耐雷水平(kA) |
220 |
146.7 |
110 |
88 |
73.3 |
| (与设计值150 kA比值) |
146.70% |
97.80% |
73.30% |
58.70% |
48.90% |