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      负荷开关用真空灭弧室
      TF-12/630-20(JUC702)

      TF-12/630-20(JUC702) vacuum interrupter for load break switch

      主要项目的技术参数 Main technical parameters

      Items

      Value

      额定电压 

      Rated voltage

      12KV

      额定电流 

      Rated current

      630A

      额定频率 

      Rated frequency

      50Hz

      额定短时工频耐受电压(1min)

      Rated power frequency withstand voltage

      42kV

      额定雷电冲击耐受电压

      Rated lightning impulse withstand voltage

      75kV

      额定短时耐受电流

      Rated short time withstand current

      20KA

      额定峰值耐受电流

      Rated withstand current(peak value)

      50KA

      额定短路关合电流(峰值)

      Rated short circuit making current(peak value)

      50KA

      额定闭环开断电流

      Rated closed-loop breaking current

      630A

      额定有功负载开断电流

      Rated active load breaking current

      630A

      额定电缆充电开断电流

      Rated cable charging breaking current

      10A

      额定短路持续时间

      Rated duration of short circuit

      4s

      机械寿命

      Mechanical life

      10000 times

      触头自闭力

      Closing force due to bellows and atmosphere

      70±20N

      额定开距下触头反力

      Force required to hold contacts opening at full stroke

      120±30N

      额定触头压力下限时的回路电阻

      Circuit resistance at minimum contacts force

      40μΩ

      贮存期

      Storage life

      20 years

      触头允许磨损厚度

      Limiting abrasion of contacts

      3mm

      配用的真空负荷开关的机械参数 Mechanical requirements of vacuum load break switch

      Items

      Value

      触头开距

      Clearance between opening contacts

      6±1 mm

      平均分闸速度(触头闭合位置~75%开距)

      Average opening speed(Contacts closing position~75% contacts opening distance)

      1.0±0.2 m/s

      平均合闸速度(30%开距~触头闭合位置)

      Average closing speed(30% contacts opening distance~ contacts closing position)

      0.6±0.2 m/s

      额定触头压力

      Rated contacts pressure

      900±100 N

      触头合闸弹跳时间

      Contacts bouncing duration at closing operation

      ≤2 ms

      触头分闸反弹幅值

      Contacts re-bouncing clearance at opening operation

      ≤2 mm

      三相同期性

      Synchronism of three phases

      ≤1ms


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