secondary relay nuclei 次级感觉接替核
secondary thermal relay 二次热敏继电器
scraper relay secondary valve 铲运机继电器二次阀
relay for secondary air pump 二次空气泵继电器
The relay control wiring, also known as"secondary wiring", plays an important part in the safely operating, running and maintaining in the power plant and the substation.
发电厂和变电所的继电控制接线，又称为“二次接线”，是发电厂和变电所安全生产、运行维护的重要组成部分。
The effects of PT secondary circuit on relay protection and measurement were analyzed by an example and the improving measures were set forward.
引用实例分析了PT二次回路对继电保护和计量的影响，并提出了改进措施。
Also, sufficient internal peripherals make the system be able to adjust secondary development for the relay protection network.
同时，丰富的片内资源使系统具备了面向继电保护网络化的二次开发能力。
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