TD 12kv 1250A 25KA (JUC613) Vacuum Interrupter F - Other Classified Ads in Yichang

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Main technical parameters
Rated voltage: 12 KV
Rated current: 1250A
Rated power frequency withstand voltage: 42 KV
Rated lightning impulse withstand voltage: 75 KV
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: 25KA
Rated withstand current(peak value): 63KA
Rated duration of short circuit: 4S
Mechanical life: 20,000 times
Closing force due to bellows and atmosphere: 12050N
Force required to hold contacts opening at full stroke: 19050N
Circuit resistance at lowest rated contacts force: ?20??
Storage life: 20 years
Limiting abrasion of contacts: 3 mm

Mechanical requiements of vacuum circuit breaker
Clearance between opening contacts: 111mm
Average opening speed(Contacts closing position~75% contacts opening distance): 1.10.2 m/s
Average closing speed(30% contacts opening distance~contacts closing position): 0.60.2 m/s
Rated contacts pressure: 2000200N
Contacts bouncing duration at closing operation: ?2ms
Contacts re-bouncing clearance at opening operation: ?2mm
Synchronism of three phases: ?1ms
January 21, 2019
4#Road Xiannv Zhijiang City, Yichang, China
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TD 12kv 1250A 25KA (JUC613) vacuum interrupter f