Vacuum Interrupter TD-12/1250-25(JUCA613) for circuit breaker from JUCRO EleCTric
Main technical parameters |
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Items | Value | Rated voltage | 12kV | Rated current | 1250A | Rated frequency | 50Hz | (1min) Rated power frequency withstand voltage
| 42kV | Rated lightning impluse withstand voltage | 75kV | Rated short circuit breaking current(peak value) | 25KA | Rated short circuit making current(peak value) | 63kA | Breaking operations under rated short circuit breaking current | 30 times | Rated short time withstand current | 25kA | Rated withstand current (peak value) | 63kA | Rated duration of the short circuit | 4s | Circuit resistance at lowest rated contacts force | ≤25μΩ | Mechanical life | 20000 times | Closing force due to bellows and atmosphere | 80±40N | Force required to hold contacts opening at full stroke | 120±50N | Limiting abrasion of contacts | 3mm | Storage life | 20 years | Moving mass of interruPTer | 0.84kg | Rated operating sequence | O-0.3s-CO-180s-CO |
Model No.: JUCA-12/1250-25(JUCA613) Mechanical requiements of vacuum circuit breaker |
Items | Value | Clearance between opening contacts | 11±1mm | Average opening speed | 1.1±0.2 m/s | Average closing speed | 0.6±0.2 m/s | Rated contacts pressure | 2000±200N | Contacts bouncing duration at closing operation | ≤2ms | Contacts re-bouncing clearance at opening operation | ≤2mm | Synchronism of three phases | ≤1ms |
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Note:
# Must contact with JUCRO.
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