The experimental result shows that the designed digital relay has the characteristics of good real-time, high EMC, small volume, low cost and simple implementation.

实验结果表明，所设计继电器不仅实时性好、电磁兼容性强，而且体积小、成本低、容易实现。

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Introduction was made to the composition and working principle of a power-off time delay relay which adopts CMOS digital circuit, digital dial disc for switch setting and without auxiliary power.

介绍了一种采用CMOS数字电路、数字拨盘开关整定、无辅助电源的断电延时继电器的组成及工作原理。

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The paper introduces the designing method of the digital time-delay relay and gives the detailed electric circuit picture.

阐述了数字式时间继电器的设计方法，给出了详细的电路图。

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