本指南旨在帮助读者有效应用继电器保护电力系统电气母线。所述总线保护仅指总线位置的保护，与远程位置的设备无关。其中包括美国使用的公共巴士安排和一些特殊安排。并非所有的母线保护系统或所有可能的母线布置都包括在内。

This guide has been prepared to assist the reader in the effective application of relays for protection of power system electrical buses. The bus protection described refers only to protection at the bus location, independent of equipment at remote locations. Common bus arrangements and some special arrangements used in the United States are covered. Not all bus protection systems or all possible bus arrangements are included.