The operating value of earth leakage protection can be changed with the mains voltage, but the operating value of cables insulation resistance is held the line.

该设计可以根据电网电压的波动调整动作值，从而保证电缆绝缘电阻的动作值不变；

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The result shows, under different vibration mode, equivalent parallel capacitance and resistance are not constant value. There is negative damp effect in transducer system at the operating mode.

结果表明，在换能器不同振动模态下，等效并联电容电阻并非恒定值，而且实际支承工况下换能器系统工作时存在负阻尼效应。

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This paper is to demonstrate two parameters of earth-leakage protection relevant to safety-value of operating resistance and operating time.

本文的目的在于论述与安全有关的漏电保护的两个参数——动作电阻值和动作时间。

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