This paper describes the operation principle of a simple phase sequencerelay, 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。
2
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％。
3
It mainly focuses on analysis and determining method of zero sequence power direction relay.