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指出了因外电网相序变化而导致电源屏输出电压过高烧毁信号设备的问题,对其原因进行了分析,提出了调压屏相序监督和自动调整的方案。
The paper points out the problem that the output voltage of the power screen is too high and burns out the signal equipment due to the change of the phase sequence of the external power grid. The reason is analyzed, and the scheme of phase sequence supervision and automatic adjustment of the voltage regulating screen is proposed.