避雷器

Because concerned code lack monitoring and guidance for the arresters, it is necessary to carry through monitoring for 27.5 kV arrester.

有关规程缺乏对这类避雷器的监控指导，因此有必要对27.5 kV避雷器进行监测。

The arrestor can be divided into two types of power source arrester and signal arrester. This paper is researching on the design and test for a power source arrester.

避雷器分为电源避雷器和信号避雷器，本研究就是设计电源避雷器及其测试。

The proper series gaps are determined. The voltage distribution of arrester with series gap supported by insulator is completed. The key part of the arrester electrical field distribution is presented.

为了进一步保证避雷器运行的稳定性和可靠性，论文还对带绝缘支撑件间隙避雷器的电场分布进行了模拟计算，以校核关键部位的电位和电场分布。

It is beneficial to develop transmission line arresters. The development of the transmission line arrester is reviewed in this paper. Base on the over-voltage of 220kV transmission line, the nominal discharge current of 220kV transmission line arresters with series gap is analyzed, and the technical parameter of ZnO blocks is confirmed.

本文介绍了线路避雷器的发展状况，根据220kV输电线路的雷电过电压情况，计算了220kV有外串间隙线路避雷器的标称放电电流，确定了氧化锌电阻片的主要技术参数，特别是避雷器本体直流1mA的确定，保证了避雷器的灭弧电压大于220kV系统的最大工频电压。

In order to study the function of line surge arrester at line lightning protection equivalent circuit of line surge operation had been built considering conditions of straight lightning strike on tower top and round strike to conductor .

为了研究线路避雷器在防雷中的作用，根据雷电直击杆塔顶部及绕击导线两种情况，建立线路避雷器动作时的等值电路，推导出考虑残压影响的线路避雷器对雷电流的分流计算公式。

The accidents statistics from 2000 to 2003 are analyzed in this paper.Based on the tradition lightning conductor,ATPsoftware is used to stimulate the operation of zinc oxide surge arresters,and good effect is taken according to the data of the stimulation.Our plan is to install zinc oxide surge arresters on the power grid and the pole where there are easily destroyed by the lightning.The work from July 2004 to May 2005 is finished.

对2000～2003年来雷击事故进行了统计分析，在传统避雷线、杆塔接地装置防雷设施基础上，采用ATP软件对安装线路氧化锌避雷器进行仿真计算，依据仿真结果，确定了在架空线路易击段、易击杆塔、特殊地形地貌杆塔安装线路型氧化锌避雷器方案，并从2004年7月至2005年5月在35kV、110kV架空线路上安装了线路型氧化锌避雷器。

For reducing the LEMP lighting electromagnetic pulse radiation, the electrical source uses the Box-type power supply arrester, the power supply arrester and the modular power supply arrester as the third SPD surge protection device. The Low-voltage surge arrester or spark gap is laid between the compute net and equipotential grounding grids for avoiding signal interference and counterattack of ground voltage. The parameter and model of the signal lighting-protector of lines of communication are chosen according to the transfer rate, work level and characteristic impedance.

对控制房和DCS柜采用避雷针、独立针的直接雷防护；系统电源分别采用箱式电源避雷器、电源避雷器、模块式电源避雷器作为三级电源保护，减少LEMP雷电电磁脉冲辐射；计算机网络与等电位地网间设置低压避雷器或火花隙防止信号干扰和避免地电压反击；根据传输速率、工作电平、特性阻抗等，选择通信线路的信号防雷保护器的参数和型号。

The inner structure and insulation of arrester unit are investigated by test, by utilizing the single-unit arrester, the arrester becomes more compacter.

采用单节结构使避雷器结构紧凑化；并通过合理的工艺消除了避雷器内绝缘气隙，使避雷器本体局部放电量远小于标准规定值。

Corresponding to the requirements and tasks overvoltage protection devices are faced with in their installation location, they are divided into lightning arresters, surge arresters and combined.

重要的是要考虑到所有产生过压的原因。根据对过压防护设备及其安装部位的要求和任务，将它们分成雷电避雷器、电涌避雷器和组合避雷器。

When strategically placed on the electric grid, the arrestors carry the lightning surges away to the ground – after which the arrestors return to their role as insulators.

当把避雷器安装在电网上时，可以将闪电通过避雷器导入地面——完成这个过程以后，避雷器又转变成绝缘体。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。