过电压

An earthing device of overtension protection will be introduced.

并详细介绍了作者设计的一种过电压保护接地装置。

For switching capacitances group overvoltage, vacuum circuit breaker refining technics requires strengthening, and chamber reignition probability might be confined in minimum extension.

为减小开断电容器组过电压的危害，应加强真空断路器的老炼工艺，将灭弧室的重击穿概率限制在最小的范围内。

For switching capacitancesgroup overvoltage,vacuum circuit breaker refining technics requires strengthening,andchamber reignition probability might be confined in minimum extension.

为减小开断电容器组过电压的危害，应加强真空断路器的老炼工艺，将灭弧室的重击穿概率限制在最小的范围内。

If at, or in the proximity of, the origin of the electrical installation, Overvoltage Category IV.

如果位于电气装置上或在电气装置附近，其过电压等级为IV级。

The laws of the over-voltages during restrikes and of the ground-fault currents are shown.

给出了重燃弧暂态过电压和接地故障电流的规律，并给出了物理解释。

While the switching overvoltage is 1.8 pu,the minimum air clearance of upper space and lower space on ±660 kV DC double-circuit transmission line tower is 4.8 m and 4.9 m respectively at the attitude below 1 000 m, when at the attitude of 2 000 m, the minimum air clearance of upper and lower spaces is 5.4 m and 5.5 m respectively.

最后，结合宁东-山东直流输电工程的实际情况，在1.8pu操作过电压下，对于海拔1000m及以下地区，±660kV同塔双回塔头的上层空气间隙距离建议为4.8m，下层空气间隙距离建议为4.9m；当海拔为2000m时，这2个距离分别建议为5.4m和5.5m。

The method conquers overvoltage of commutation and inrush current of transformer when the breaker is closed.

该方法能够克服在换相过程中极易产生的过电压和合闸涌流对牵引变压器的冲击。

Research on transient over voltage during operation of 500 kV GIS disconnecting switch.

杨凌辉，张嘉旻。500 kVGIS隔离闸刀操作暂态过电压的研究。

The high frequency circuit model of transformer windings is indispensable in analyzing the transients particularly caused by the very fast transients which occur at the time of disconnecting switch operations in GIS.

变压器绕组的高频模型对于分析特快速暂态过电压对变压器的影响是非常重要的。从易于高频测量的散射参数出发，提出了一种建立变压器绕组高频电路模型的方法。

Modern EHV arresters must be capable of discharging these high-energy switching surges.

现代超高压避雷器必须能在这些高能量的操作过电压下放电。

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。