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                                              固封极柱用真空灭弧室
                                              TD-24/1250-25(JUC619B)

                                              TD-24/1250-25(JUC619B) vacuum interrupter for circuit breaker

                                              主要项目的技术参数 Main technical parameters

                                              Items

                                              Value

                                              额定电压 

                                              Rated voltage

                                              24KV

                                              额定电流 

                                              Rated current

                                              1250A

                                              额定频率 

                                              Rated frequency

                                              50Hz

                                              额定短时工频耐受电压(1min)*

                                              Rated power frequency withstand voltage

                                              79kV

                                              额定雷电冲击耐受电压(峰值)*

                                              Rated lightning impulse withstand voltage(Peak value)

                                              145kV

                                              额定短路开断电流

                                              Rated short circuit breaking current

                                              25KA

                                              额定短路关合电流(峰值)

                                              Rated short circuit making current(peak value)

                                              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

                                              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

                                              10000 times

                                              触头自闭力

                                              Closing force due to bellows and atmosphere

                                              120±50N

                                              额定开距下触头反力

                                              Force required to hold contacts opening at full stroke

                                              190±50N

                                              额定触头压力下限时的回路电阻

                                              Circuit resistance at minimum contacts force

                                              ≤20μΩ

                                              贮存期

                                              Storage life

                                              20 years

                                              触头允许磨损厚度

                                              Limiting abrasion of contacts

                                              3mm

                                              Model No.: TD-24/1250-25(JUC619B)

                                              配用的真空断路器的机械参数 Mechanical requirements of vacuum circuit breaker

                                              Items

                                              Value

                                              触头开距

                                              Clearance between opening contacts

                                              13±1mm

                                              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)

                                              1.3±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)

                                              0.7±0.2 m/s

                                              额定触头压力

                                              Rated contacts pressure

                                              2500±200N

                                              触头合闸弹跳时间

                                              Contacts bouncing duration at closing operation

                                              ≤2ms

                                              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

                                              ≤1ms

                                              Remarks:

                                              1. * 需外绝缘?;?。

                                              * It Needs additional insultating protection.


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