Specifications of Embedded Pole
| Main Technical Specification | Unit | Specification | ||
| 1250 | 1250 | 630 | ||
| Rated voltage | kV | 12 | ||
| Rated current | A | 1250 | 1250 | 630 |
| Rated frequency | HZ | 50/60 | ||
| Short time power frequency withstand voltage(1min) | kV | 48 | ||
| Lightning impulse withstand voltage | kV | 95 | ||
| Rated short circuit breaking current | kA | 31.5 | 25 | 25 |
| Rated peak withstand current | kA | 80 | 63 | |
| Rated short circuit making current | kA | 80 | 63 | |
| Rated short time withstand current | kA | 31.5 | 25 | 25 |
| Rated duration of short circuit | S | 4 | ||
| Rated breaking current of single capacitor bank | A | 400 | ||
| Rated breaking current of back to back capacitor bank | A | 400 | ||
| Rated operating sequence | O-0.3s-CO180s-CO | |||
| Breaking operations of rated short circuit breaking current | Times | 30 | ||
| Rated mechanical endurance | Times | 20000 | ||
| Closing force due to bellow and atmosphere | N | 200±50 | ||
| Force required to hold contacts open at full stroke | N | 300±50 | ||
| Circuit resistance at lower limit of rated contact force | mΩ | ≤20 | ||
| Contacts limit erosion | mm | 3 | ||
| Gas pressure inside vacuum interrupter | Pa | ≤1x10?3 | ||
| Localize discharge | Pc | ≤5 | ||
Mechanical Data Required for the Matched Vacuum Switchgear
| Main Technical Specification | Unit | Specification | ||
| 1250 | 1250 | 630 | ||
| Clearance between open contacts | mm | 9±1 | ||
| Average opening speed | m/s | 1.2±0.2 | ||
| Average closing speed | m/s | 1.0±0.2 | 0.6±0.2 | |
| Rated of contact force | N | 2300±200 | 2000±200 | |
| Contact bouncing duration at closing operation | ms | ≤3 | ||
| Out of simultaneity of contact closing and opening | ms | ≤2 | ||
| Maximum rebound during opening | mm | ≤3 | ||
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