| Message: | 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: 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: 3 mm
Mechanical requiements of vacuum circuit breaker
Clearance between opening contacts: 11±1mm
Average opening speed(Contacts closing position~75% contacts opening distance): 1.1±0.2 m/s
Average closing speed(30% contacts opening distance~contacts closing position): 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
Items Value
Rated voltage 12KV
Rated current 1250A
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 25kA
Rated withstand current(peak value) 63kA
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
|
my account
