The monitor and protection device is made up of microprocessor and features stronger function, low cost and higher reliability.

基于对运行电流的各相序分量的分析，以微机构成监测保护装置，该装置功能强、成本低、可靠性高。

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And traditional flow chart linearity programme is adopted in most microprocessor-based protection device for the present, which makes some problems such as hard maintenance, hard upgrade and etc.

同时在目前运行的微机保护装置的软件的编程上采用的传统的流程图线性程序，造成了软件的不易维护，升级换代困难等问题。

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This paper introduces a comprehensive protection device of electric motor with single chip microprocessor in coal mines.

本文介绍了利用单片机实现的矿井数字式电动机综合保护装置。

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