Vacuum Interrupter TD-12KV 2000A 25KA (JUC629B) for circuit breaker from JUCRO EleCTric
Main technical parameters |
Items | Value | Rated voltage | 12kV | Rated current | 2000A | Rated frequency | 50Hz | Rated power frequency withstand voltage | 42kV | Rated lightning impulse withstand voltage | 75kV | Rated short circuit breaking current | 25KA | Rated short circuit making current(peak value) | 63KA | Breaking operations under rated short circuit breaking current | 30 times | Rated short time withstand current(4s) | 25kA | Rated withstand current(peak value) | 63kA | Rated duration of short circuit | 4s | Mechanical life | 20000 times | Closing force due to bellows and atmosphere | 100±30N | Force required to hold contacts opening at full stroke | 200±30N | Circuit resistance at lowest rated contacts force | ≤20μΩ | Storage life | 20 years | Limiting abrasion of contacts | 3mm | Weight of moveable parts | 1.2kg |
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Mechanical requiements of vacuum circuit breaker |
Items | Value |
Clearance between opening contacts | 9±1mm |
Average opening speed | 1.0±0.25 m/s |
Average closing speed | 0.65±0.15 m/s |
Rated contacts pressure | 3100±200N |
Contacts bouncing duration at closing operation | ≤2ms |
Contacts re-bouncing clearance at opening operation | ≤2mm |
Synchronism of three phases | ≤1ms |