Vacuum Interrupter JUCA-40.5KV 2000A 31.5KA (JUC61070) for circuit breaker from JUCRO EleCTric
Main technical parameters |
Items | Value | Rated voltage | 40.5kV | Rated current | 2000A | Rated frequency | 50Hz | Rated power frequency withstand voltage | 95kV | Rated lightning impulse withstand voltage | 185kV | 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(4s) | 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 | 200±60N | Force required to hold contacts opening at full stroke | 300±60N | Circuit resistance at lowest rated contacts force | ≤20μΩ | Storage life | 20 years | Limiting abrasion of contacts | 3mm | Weight of moveable parts | 3.5kg |
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Model No.: JUCA-40.5/2000-31.5(JUC61070) Mechanical requirements of vacuum circuit breaker
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Items | Value |
Clearance between opening contacts | 19±1mm |
Average opening speed | 1.7±0.3 m/s |
Average closing speed | 1±0.2 m/s |
Rated contacts pressure | 3600±300N |
Contacts bouncing duration at closing operation | ≤3ms |
Contacts re-bouncing clearance at opening operation | ≤3mm |
Synchronism of three phases | ≤3mm |