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。

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Typically, surges are caused by switching operations or by lightning.

通常，冲击由投切操作或雷电引起。

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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.

目前随着更高工作电压的使用，由于断路器分闸、合闸操作所引起的电压暂态过程或过电压．已成为主要考虑的方面。

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