| Main Technical Specification |
| VOLTAGE RATINGS |
| Rated voltage(Ur) | kV | 1.14 |
| Rated short-time(1min)power-frequency withstand voltage(Ud) | kV | 21 |
| Rated lightning impulse withstand voltage(Peak)(Up) | kV | 40 |
| Rated frequency(fr) | Hz | 50 |
| CURRENT RATINGS |
| Rated current(Ir) | A | 1250 |
| Circuit resistance at lowest rated contact force | μΩ | ≤60 |
| Rated short-time withstand current(lk) | kA | 10 |
| Rated duration of short-circuit(tk) | s | 4 |
| Rated peak withstand current(lp) | kA | 10 |
| Rated making current | kA | 6.3 |
| Limit breaking current | A | 10 |
| MECHANICAL DATA |
| Weight of movable parts | kg | ≤0.6 |
| Closing force due to bellow and atmosphere | N | 70±30 |
| Force required to hold contacts open at full stroke | N | 120±40 |
| MECHANICAL REQUIREMENTS |
| Clearance between open contacts | mm | 3±1 |
| Average opening speed (average of first 75% contact gap) | m/s | 0.4-0.5 |
| Average closing speed (average of last 30% contact gap) | m/s | 0.15-0.25 |
| Rated added external contact final force | N | 250±50 |
| Contact bouncing duration at closing operation | ms | ≤2 |
| Closing and opening non-simultaneity of three-phase contacts | ms | ≤2 |
| Maximum rebound during opening | mm | ≤1 |
| LIFE |
| Storage life | years | 20 |
| Rated mechanical endurance | Times | 300000 |
| Contacts limit erosion | mm | 3 |
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