| Technical specification |
| No. | Item | Unit | Data |
| 1 | Rated frequency | Hz | 50 |
| 2 | Rated voltage | kV | 12 |
| 3 | Rated current | A | 630/1250 |
| 4 | Rated short-time power frequency withstand voltage | Interphase, to earth(wet) | kV/min | 42/1 |
| Interphase, to earth(dry) | 48/1 |
| Break(dry) | 34/1 |
| Secondary circuit to earth | 2/1 |
| 5 | Rated lightning impulse withstand voltage | Interphase, to earth | kV | 75 |
| Break | 85 |
| 6 | Rated short-circuit breaking current | kA | 20/25 |
| 7 | Rated short-circuit making current(peak) | | 50/63 |
| 8 | Rated short-time withstand current and duration | kA/s | (20/25)/4 |
| 9 | Rated peak withstand current | kA | 50/63 |
| 10 | Rated short-circuit breaking current breaking times | Times | 30 |
| 11 | Rated operating voltage and rated voltage of the auxiliary circuit | V | AC/DC220,DC48,DC24 |
| 12 | Main circuit resistance | Without isolation | μΩ | ≤80 |
| With isolation | | ≤120 |
| 13 | Mechanical life | Times | 10000 |
| Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate. |
Complaint
