| Item | Unit | Data | ||
| Rated voltage | kV | 12 | ||
| 4S thermal stability current | kA | 25、31.5、40 | ||
| Dynamic stability current | kA | 80、100 | ||
| Short circuit closing current | kA | 80、100 | ||
| Rated insulation level | 1min working withstand voltage | kV | Pole-to-ground and pole-to-pole | 42 |
| Lightning impulse withstand voltage | 75 | |||
| Center distance between poles | mm | 210、230、250、275 | ||
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