Modern EHV arresters must be capable of discharging these high-energy switchingsurges.
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。
2
Typically, surges are caused by switching operations or by lightning.
通常，冲击由投切操作或雷电引起。
3
With the much higher operating voltages now in use the projected voltage transients or surges due to switching i. e. the opening and closing of circuit breakers, have become the major consideration.