Analyse the problems of electromagnetical relay used in transformer substation, inroduce system configuration of transformer substation reform , characteristic of technology.

分析了变电站原用电磁式继电器存在的问题，综合自动化改造的系统结构，技术特点。

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This paper Outlines the computer monitoring system and relay protection system of Shuiquan Bay pumping station for level ground water diversion project, and system configuration and main function.

概述了坪上输水工程水泉湾泵站的计算机监控系统、继电保护系统以及系统的配置和主要功能。

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A distributive configuration PLC system was used as control terminal of the detection device, while a relay loop as a redundancy control system.

设计一种基于光电池的核废料沉淀罐沉淀界面位置检测装置，采用分布式组态plc系统作为控制终端，继电器控制回路作为冗余控制系统。

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