他说，接地棒是最基本的，避雷器成本可能高达400美元或以上，但或许更大的开支是组织和维护这个系统。

While grounding rods are basic and surge protectors can cost as much as $400 or more, a perhaps bigger expense is to organize and maintain the system, he said.

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连接的电气元件有断路器、隔离开关与接地开关、电流互感器、电压互感器、避雷器、母线等。

The electrical elements connected include circuit breaker disconnector and earthing switch current transformer voltage transformer lightning arrester bus etc.

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输电线路的接地电阻，线路档距等因素对线路型避雷器的应用有影响。

Tower grounding resistance, distance between towers, etc can affect the function of line-surge arrester.

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