Rated lightning impulse withstand voltage: L175KV;

额定雷电冲击耐受电压L175KV；

Operating voltage can seriously influence the over-voltage, arising from the transformer under the lightning impulse .

工作电压会严重地影响变压器遭受雷击时产生的过电压。

This paper deals with the selection lightning impulse insulation level of electrical apparatus in 500kv sub-stations by using the statistical method.

本文主要用统计方法对500千伏变电所电气设备，在雷击线路沿导线侵入雷电波情况下，雷电冲击绝缘水平的选择作了分析和探讨。

The discharging properties of air gap in natural ambience with different conditions under power frequency voltage and lightning impulse voltage are studied.

通过对该避雷器进行大量的雷电冲击放电试验，确定了间隙距离和安装位置。

There is not direct mathematical relations among virtual front time, virtual tail time and theoretical front time, theoretical tail time of lightning impulse.

雷电波的视在波头时间和视在波尾时间与理论波头时间和理论波尾时间没有直接的数学关系。