35kV真空断路器操作过电压分析和35kV组合式氧化锌避雷器

本文对现有的以35kV真空断路器为主控开关的电炉炼钢系统曾多次因操作过电压而造成的电力设备绝缘损坏事故进行了分析,并在对现场实测结果做了认真研究的基础上,提出了一种新型的组合式氧化锌避雷器;文中对它的原理和结构作了介绍,经20多台的运行考核,效果良好。

The Analysis of Switching Overvoltage for 35kV Vacuum Breaker And 35kV Surge Arrester for Limiting Overvoltage.

The electri furnace steelmaking system,using 35kV vacuum breaker as main central device, take places overvoltage time and again in operation and makes the insulation of transformer and breaker damage. Through the field masurments, it is show that the phase-phase overvoltage is higher. We think, it is a new problem and have to be consided in insulation protection. A composite surge arrester, which having a new structure not only protect the phase-ground but phase-phase, was designed.