This paper describes the operation principle of a simple phase sequence relay, its parameter calculating method, and the correlative relationship and optimization problem on element parameters.
本文阐述了一种简单的相序保护器的工作原理及其参数计算原则，讨论了元件参数之间的相对关系和优化问题。
This system optimizes the test and replacement sequence of the aviation relay by using reasoning, and the costs are reduced by as much as 50%.
该系统利用推理对航空继电器检测和替换顺序进行了优化，节约费用约50％。
It mainly focuses on analysis and determining method of zero sequence power direction relay.
重点介绍零序功率方向继电器的分析及判定方法。
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