使用者可将继电器接地故障跳闸电流设置为高于最高值几毫安，以准确测量系统充电。
User is able to set the ground fault trip current of the relay just milliamps above the highest level, to accurately measure the system charging.
击距法计算的绕击跳闸率较规程法计算值要严重；
The round-strike switching ratecalculated by strike distance method is more serious than that by regulationsmethod.
计人感应雷击计算的总跳闸次数更接近实际运行值。
The total lightning outage rate is closer to the the practical running result.
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