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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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