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。
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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