The protective relays used in modern industrial installations are complex microprocessor-based devices. Some of them deserve to be called protection programmable logic controllers (PLCs) due to their complexity and flexibility. The impressive abilities of these relays require the careful design and documentation of the intended functions and philosophies underlying them. Interrelay communications for high-speed zone-selective interlocking and complex control interlocking and intertripping add further complexities, as does the common practice of having multiple design entities working on different portions of the same facility. This article considers documentation schemes developed for two recent projects that included complex protection equipment. Protection philosophies and narratives, communications scheme documentation, and programmable logic documentation are discussed in an effort to illustrate a complete approach that will be useful to both specialists and field personnel for understanding protection systems.

中文翻译：

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基于微处理器的保护继电器配置：工业应用中的有效文档


现代工业装置中使用的保护继电器是基于微处理器的复杂设备。其中一些由于其复杂性和灵活性而值得被称为保护可编程逻辑控制器（PLC）。这些继电器令人印象深刻的能力需要对其预期功能和原理进行仔细设计和记录。用于高速区域选择性联锁和复杂控制联锁和互跳的中继间通信进一步增加了复杂性，就像让多个设计实体在同一设施的不同部分工作的常见做法一样。本文考虑为最近两个项目开发的文档方案，其中包括复杂的保护设备。讨论了保护原理和叙述、通信方案文档和可编程逻辑文档，以说明一种完整的方法，该方法对于专家和现场人员理解保护系统都有用。