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Hubei Dayu Hanguang Vacuum Electric Co.,Ltd.
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Home Page > VI for outdoor circuit breakers > Vacuum interrupter for outdoor circuit breaker TD4
Vacuum interrupter for outdoor circuit breaker TD4
  • Product name:

    Vacuum interrupter for outdoor circuit breaker TD4

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    Category: VI for outdoor circuit breakers
    Model: VITD24/1250-20
Product details
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Main Technical Parameter
Rated voltage24kV
Rated current1250A
Rated frequency50Hz
Rated short-time Power frequency withstand voltage79kV
Rated lightning impulse withstand voltage145kV
Rated short-circuit breaking current20kA
Rated short-circuit making current(peak)50kA
Breaking operations of rated short circuit breaking current20 times
Rated breaking current of single capacitor bank400A
Rated short-time withstand current20kA
Rated peak withstand current50kA
Rated duration of short-circuit4 s
Mechanical endurance10000 times
Closing force due to bellow and atmosphere120±50N
Force required to hold contacts open at full storke190±60N
Circuit resistance at lowest rated contact force≤30μΩ
Storage life20 years
Contacts limit erosion3mm
Weight of movable parts≤1.5 kg
MECHANICAL DATA REQUIRED FOR THE MATCHED VACUUM SWITCHGEAR
Clearance between open contacts13±1 mm
Contact connection stroke3.5±0.5mm
Average opening speed(average of 75% contact gap)1.5±0.2m/s
Average closing speed(average of last 30% contact gap)0.8±0.2m/s
Rated added extemal contact final force2500±200N
Contact bouncing duration at closing operation≤2 ms
Closing and opening non-simultaneity of three-phase contacts≤1 ms

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