本指南为不同类型的移相变压器（PST）提供保护方法，并讨论保护和PST运行条件之间的相互作用。提出了用于确定继电保护功能短路电流的PST模型。包括用于保护PST的保护电流互感器的尺寸和位置问题。本指南提供了适当继电器应用和设置的示例。

This guide provides protection methods for different types of phase shifting transformers (PSTs) and discusses the interaction between protection and operating conditions of PSTs. Models representing PSTs to determine short circuit currents for relaying functions are presented. Sizing and location issues of protection current transformers employed in the protection of PSTs are included. This guide provides examples of appropriate relay applications and settings.