Vacuum Interrupter TD-12/1600-31.5(JUC618A) for circuit breaker from JUCRO EleCTric
MAIN TECHNICAL PARAMETERS | Items | Value | Rated voltage | 12KV | Rated current | 1250A/1600 | Rated frequency | 50Hz | Rated power frequency withstand voltage | 42kV | Rated lightning impulse withstand voltage | 75kV | Rated short circuit breaking current | 31.5KA | Rated short circuit making current(peak value) | 80KA | Breaking operations under rated short circuit breaking current | 30 times | Rated short time withstand current | 31.5kA | Rated withstand current(peak value) | 80kA | Rated duration of short circuit | 4s | Mechanical life | 20000 times | Closing force due to bellows and atmosphere | 120±50N | Force required to hold contacts opening at full stroke | 190±50N | Circuit resistance at lowest rated contacts force | ≤20μΩ | Storage life | 20 years | Limiting abrasion of contacts | 3mm | Weight of moveable parts | 12KV |
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MECHANICAL REQUIREMENTS 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 | 3150±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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