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 computer protection system in the electrified railway can use computers to supervise and control its external secondary wiring, which improves the intelligence of computer protection.
论述了目前电气化铁道计算机继电保护系统在运行中如何利用计算机对其外部二次线路进行监控的问题，能提高计算机继电保护智能化的程度。
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