本指南讨论了电源母线保护的概念。考虑断路器、电流传感装置和隔离开关的可用性和位置，以及母线切换场景，以及它们对母线保护选择和应用的影响。介绍了几种母线保护方案；讨论了各种公交安排的充分性、复杂性、优势和局限性；提供了具体的应用指南。断路器故障（BF）保护与母线保护有关。还包括针对损坏的继电器输入信号保护总线保护方案的方法。

Concepts of power bus protection are discussed in this guide. Consideration is given to availability and location of breakers, current sensing devices, and disconnect switches, as well as bus-switching scenarios, and their impact on the selection and application of bus protection. A number of bus protection schemes are presented; their adequacy, complexity, strengths, and limitations with respect to a variety of bus arrangements are discussed; specific application guidelines are provided. Breaker failure (BF) protection is discussed as pertaining to bus protection. Means of securing bus protection schemes against corrupted relay input signals are also included.