Limited circumstances permanent fault, automatic re-closing devices on the move after the opening relay action Zaitao to identify reasons, be excluded from the power supply.

少数情况属永久性故障，自动重合闸装置动作后靠继电保护动作再跳开，查明原因，予以排除在送电。

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This paper introduces the application of micro-controller in automatic tester for general relay. Hardware design about NC power and dada storing is described in detail.

本文介绍了单片机在继电器自动测试仪中的应用。文中详细论述了硬件的设计：数控电源改造、稳合电压检测、数据存储等。

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A design scheme of multi-rate energy meter based on the broadband carrier of power lines and its automatic relay routing algorithm are proposed.

提出了基于电力线宽带载波的复费率电能表设计方案及自动中继路由算法。

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