The device can solve the problem of over current in electromotor start up process, and has the digital displaying of fault such as under voltage, over voltage and over current, etc.

该系统解决了电动机启动中电流过大的问题，并且实现电动机的过压、过流、欠压等各种故障的数字显示。

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With a typical fault analysis about the produce mechanism of resonance over-voltage, some practical restrain measures are put forward.

以一起典型事故分析谐振过电压的产生机理，并提出一些具体实际的抑制措施。

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When the output voltage is over 40v the product is protected. When the fault is excluded or is start working again the power supply is working normally.

当输出电压超过40v时，产品进入保护状态，当故障排除或重新起机时，电源工作正常。

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