In a certain electric grid conditions,multiple re-ignitions and severe over voltage may be generated at the time when breaking high frequency current.
在一定的电网条件下,在开断高频电流的过程中可能引起多次重燃和严重的过电压。
Through the tests, the re-ignition rates of arc under various structures are obtained.
以国产CJ20-40接触器为研究对象,设计了多种结构的触头灭弧系统,用积分方程法计算了触头区域的吹弧磁场,通过试验得到了电弧在各种结构下的重燃率,研究了在不同的自励吹弧磁场作用下,多纵缝灭弧室的缝宽、缝数对电弧运动和熄灭的影响,确定了CJ20-40接触器的最佳触头灭弧系统。
At present the re-ignition of vacuum switchgear in capacitor banks is one of the most important tasks need to be solved in domestic.
真空开关投切电容器组重燃问题是当前国内真空开关行业急待解决的关键问题之一。
Analysis and Countermeasures for Restrike During Capacitor Switching when Using VCB;
真空开关投切电容器组重燃问题的分析与对策
By programming based on the TACS, the simulation of the process of the breakers restrike and the process of the breakdown of capacitors is carried out.
断路器重燃过程和电容器击穿过程的模拟通过自动暂态控制开关(TACS)编程实现,3种故障原因的仿真波形图与故障录波图吻合,从而确定故障的真正原因是并联均压电容本身的绝缘缺陷未能承受正常的操作过电压而多次击穿。
Based on investigation on the situation of type test and conditioning test of switching capacitor using vacuum circuit breaker, this paper analyses the factors that influence on restrike and presents a method to reduce the restriking rate.
根据真空断路器投切电容器组型式试验与老炼试验情况的调查,分析了影响重燃的因素,提出了降低重燃率的方法和对策。
In this paper,the action of water mist on PVC fires in a cone calorimeter under different external radiant heat fluxes was studied and the reignition of the PVC fires was analyzed.
利用锥形量热仪和单流体细水雾系统研究了细水雾抑制PVC火的过程,并观察了重燃现象的发生,测量了实验中热释放速率及O2,CO2,CO和烟气的浓度变化,并对不同细水雾工作压力及不同热辐射流量下的结果进行了比较。
In this range, the probability of reignition is lower and the post zero withstand-voltage is higher.
不同开距下的试验结果表明,35kV真空灭弧室存在着一个最佳的开距范围,在此范围内,弧后重燃次数较少,且弧后耐压水平较高。
Vacuum breaker is widely applied in the reactive power compensation as the switch of shunt capacitor banks, which will cause reignition and over-voltage after the switching performance gets deteriorated.
进行无功补偿时广泛使用真空断路器作为并联电容器组的开关控制元件,其操作性能劣化后,突出的表现就是极易发生重燃和操作过电压危害。
The reason of arc restriking overvoltage is analyzed in view of the restriking condition when the 35kV vacuum circuit breaker breaks the reactive compensation device.
针对35kV真空断路器开断无功补偿装置时发生重燃的实际情况,分析了其电弧重燃产生过电压的机理。
Study on the technology of heating asphalt by heavy burning oil;
重燃油加热沥青技术的研究
Technology and Equipm ent of Asphalt Heating Method Using Heavy Burning Oil;
采用重燃油火管式加热沥青法的工艺及设备