The vacuum interrupter uses the wave ceramic as insulating shell, the contact material is CuCr alloy, the longitudinal magnetic field cup structure, with high breaking capacity, high insulation level, strong arc extinguishing ability, long life, small size and easy maintenance, No explosion risk, no pollution, low noise and so on.
| Main technical parameter | Value |
| Rated voltage | 12kV |
| Rated current | 630A |
| Rated frequency | 50Hz |
| Rated short-time power frequency withstand voltage (1 min) | 42kV |
| Rated lightning impulse withstand voltage | 75kV |
| Rated short-time withstand current | 20KA |
| Rated duration of short-circuit | 4 s |
| Rated peak withstand current | 50KA |
| Rated short-circuit making current （peak） | 50kA |
| Rated active load breaking current | 630A |
| Rated closed-loop breaking current | 630A |
| Rated cable-charing breaking current | 10A |
| Rated breaking current of single capacitor bank | 400A |
| Circuit resistance at lowest rated contact force | ≤45μΩ |
| Closing force due to bellow and atmosphere | 70±40N |
| Force required to hold contacts open at full storke | 120±40N |
| Contacts limit erosion | 3mm |
| Mechanical endurance | 10000 times |
| Weight of movable parts | ≤0.6kg |
| Storage life | 20 years |
| MECHANICAL DATA RQUIRED FOR THE MATCHEDVACUUM SWITCHGEAR | Value |
| Clearance between opening contacts | 8±1mm |
| Average opening speed | 1.0±0.2 m/s |
| Average closing speed | 0.6±0.2 m/s |
| Rated contacts pressure | 900±500N |
| Contacts bouncing duration at closing operation | ≤2ms |
| Synchronism of three phases | ≤2ms |
| Contacts re-bouncing clearance at opening operation | ≤3mm |
