主要内容包括：工频暂时过电压，潜供电流，操作过电压，金属氧化物避雷器主要参数，特高压电气设备的绝缘水平等。
Paper covers temporary overvoltages, second arc current, switching overvoltage, major parameters of MOA and insulation level of UHV AC apparatus.
如果输出电压大于预定的电压电平，则跨导放大器产生使过电压标志置位的电流。
If the output voltage is less than the predetermined voltage level, a transconductance amplifier generates a current that sets an overload flag.
如果输出电压大于预定的电压电平，则跨导放大器产生使过电压标志置位的电流。
If the output voltage is less than the predetermined voltage level, a transconductance amplifier generates a current that sets an overload flag.
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