1. Altitude: ≤2000m; Earthquake intensity: not more than eight
2. Air temperature: not higher than +40℃, not less than -30℃. The daily average of relative humidity not more than 90%, monthly average not more than 90%.
3. The installation site with frequent and violent vibration is not suitable for the installation site with water vapor, gas, chemical corrosive deposition, salt spray, dust and dirt, fire and explosion hazards that obviously affect the performance of the mechanism.
| Content | Unit | Parameter |
| Rated Voltage | KV | 12 |
| Rated frequency | Hz | 50 |
| Rated current | A | 630 |
| Rated short-time withstand current | KA | 20/25 |
| Rated peak withstand current | KA | 63 |
| Rated short-circuit duration | s | 2 |
| Rated short circuit closing cu「rent | KA | 63 |
| Mechanical life | Time | 10000 |
| Opening contact renounce amplitude | mm | ≤2 |
| Opening Tri-phase Discontinuity | ms | ≤2 |
| Closing Tri-phase Discontinuity | ms | ≤2 |
| Average opening speed | m/s | |
| Average closing speed (full open distance) | m/s | |
| Contact opening distance | mm | |
| Overtravel | mm | |
| Contract pressure | N | |
| Circuit breaker resistance | μΩ | |
| Air break frequency withstand voltage | kV/Min | |
| Closing contact bounce time | ms | ≤2 |
| Overall local discharger | PC | ≤20 |
