过电压

The over voltage induced in motor terminal has great hazard on safety and reliability of system operation.

电机端过电压对系统的安全可靠运行产生很大的危害。

This can lead to over-voltages in inductive circuit.

这可能会在电感电路中导致过电压。

Resistor R21 and capacitor C24 form a snubber network that suppresses transient overvoltage ringing at diode D1 caused by transformer T1 leakage inductance and diode D1 junction capacitance.

电阻R21和电容C24的形成缓冲网络，抑制瞬态过电压在由变压器T1的漏感和二极管D1的结电容二极管D1引起振铃。

In addition,theprecondition of valid protection in the substation is discussed,only with the lightning arrester at the overhead-line entrance.

另外还对在哪些条件下可仅在线路入口处装避雷器即可对整个变电站内的雷电过电压提供有效保护进行了探讨。

Electrical equipment and the main parameters of models, mine and over-voltage protection equipment design, from the substation the size of the design, select the number and height of the lightning rod, lightning arrester models and mine grounding way.

主要电气设备型号及参数的确定，防雷及过电压保护装置的设计，从变电站设计的面积出发，选择了避雷针的个数及高度、避雷器的型号以及防雷接地的方式。

The results show that the overvoltage on substation equipments will increase with increases of the pole height,the pole surge ground-resistance in incoming lines and the distance between the position of lightning arrester and substation equipment.

仿真结果表明：随着进线段杆塔高度的增加、冲击接地电阻的增大以及避雷器与被保护设备间距离的增长，设备所遭受的过电压值随之增大。

Zinc Oxide Lightning Arrester has good current voltage characteristic, protective value, impulse response features, multiply thunder resistant, smear resistant and has the ability of running overvoltage. The product safely protects transform equipment and has the features of simple structure, convenient installation and maintenance and long use life.

一、特点 Features 本公司生产的氧化锌避雷器具有良好的伏安特性和优异的保护性能及冲击响应特性、高耐受多重雷及操作过电压能力、良好的耐污性能等优点，并且结构简单，安装维护方便，使用周期长，能对输变电设备提供最佳保护。

Considering some factors,including the different operation mode and lightning strike location,also calculates and analyzes the infection of the impulse grounding resistance of transmission tower,the lightning arrester s arranging and parameter for protection effect.

采用PSCAD/EMTDC程序计算分析了西北电网兰州东-银川东输变电工程750kV银川东变电站330kV线路雷电侵入波过电压保护，考虑了不同运行方式、不同雷击点的情况，还计算分析了杆塔冲击接地电阻、避雷器的布置及参数对保护效果的影响。

When lightning strikes a phase conductor of transmission line, the current will encounter the surge impedance of the conductor so that overvoltage will be built up and propagate to the substation along the transmission line in wave form.

当雷电击到输电线路的相导线上，电流遇到导线的波阻抗，这样就产生过电压，并以波的形式沿线路传至变电站。

In this paper, a brief analysis of the mechanism of overhead insulating conductor broken by lightning was introduced, and some detail information about the structure and principle of some anti-lightning broken device, such as over-voltage protector, arc-protection hardware and FLC-B lightning-protection hardware. And some electrical tests and analysis were done to these devices, after multi-comparison of those devices' performance, some specific measures are proposed against lightning broken.

本文简要分析了架空绝缘导线雷击断线的机理，详细介绍了过电压保护器、防弧金具和FLC-B型防雷金具等常用防止架空绝缘导线雷击断线装置的结构和工作原理，并对这些装置进行各种电气试验与分析，综合比较各种装置的性能之后，提出了10kV架空绝缘导线防雷击断线的具体措施。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。