Model：VITF12/630-20
Category：VI for load breaking switches
| Main Technical Parameter | ||
| Rated voltage | 12KV | |
| Rated current | 630A | |
| Rated frequency | 50Hz | |
| Rated short-time Power frequency withstand voltage | 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-charging breaking current | 10A | |
| Rated breaking current of single capacitor bank | 400A | |
| Mechanical endurance | 10000 times | |
| Closing force due to bellow and atmosphere | 80±30N | |
| Force required to hold contacts open at full storke | 140±40N | |
| Circuit resistance at lowest rated contact force | ≤45μΩ | |
| Storage life | 20 years | |
| Contacts limit erosion | 3mm | |
| Weight of movable parts | ≤0.7kg | |
| MECHANICAL DATA REQUIRED FOR THE MATCHED VACUUM SWITCHGEAR | ||
| Clearance between open contacts | 9±1 mm | |
| Contact connection stroke | 3±0.5mm | |
| Average opening speed | 1.0±0.2m/s | |
| Average closing speed | 0.6±0.2m/s | |
| Rated added extemal contact final force | 900±50N | |
| Contact bouncing duration at closing operation | ≤2 ms | |
| Closing and opening non-simultaneity of three-phase contacts | ≤2 ms | |
| Maximum rebound durning opening | ≤1.5 mm | |
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