JUCA-40.5/1250/1600-25 (JUC61177A/JUC611771A)

主要项目的技术参数 Main technical parameters

项目Items	参数Value
额定电压 Rated voltage	40.5kV
额定电流 Rated current	1250/1600A
额定频率 Rated frequency	50/60Hz
额定短时工频耐受电压(1min) Rated power frequency withstand voltage	95kV*
额定雷电冲击耐受电压(峰值) Rated lightning impulse withstand voltage(Peak value)	185KV*
额定短路开断电流 Rated short circuit breaking current	25KA
额定短路关合电流 Rated short circuit making current	63KA
额定短路开断电流开断次数 Breaking operations under rated short circuit breaking current	30 times
额定短时耐受电流 Rated short time withstand current	25kA
额定峰值耐受电流(峰值) Rated withstand current(peak value)	63kA
额定短路持续时间 Rated duration of short circuit	4s
机械寿命 Mechanical life	20000 times
触头自闭力 Closing force due to bellows and atmosphere	125±25N
额定开距下触头反力 Force required to hold contaCTs opening at full stroke	210±25N
额定触头压力下限时的回路电阻 Circuit resistance at lowest rated contacts force	≤25μΩ
贮存期 Storage life	20 years

触头允许磨损厚度

Limiting abrasion of contacts

3mm

质量/动触头质量

Total weight/ The weight of moveable contact

5.3/1.4kg

配用的真空开关的机械参数 Mechanical requirements of vacuum circuit breaker

项目Items	参数Value
触头开距 Clearance between opening contacts	19±1mm
触头接触行程 Over-travel distance after making	6±2mm
平均分闸速度(0~8mm 行程) Average opening speed(0~8mm stroke)	1.4~2.0 m/s
平均合闸速度(8mm 开距~ 触头闭合) Average closing speed(8mm opening distance~ contacts making)	0.80~1.2 m/s
额定触头压力 Rated contacts pressure	2400_-200⁺¹³⁰⁰N
触头合闸弹跳时间 Contacts bouncing duration at closing operation	≤5ms
触头分闸反弹幅值 Contacts re-bouncing clearance at opening operation	≤2mm
三相同期性 Synchronism of three phases	≤2ms