IEC 61558-2-2:20 22作为IEC 61558-2-2:20 22 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。 IEC 61558-2-2:20 22涉及控制变压器和包含控制变压器的电源单元的安全性。包含电子电路的变压器也包括在本文件中。这第三版取消并取代了2007年出版的第二版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: -根据IEC 61558-1:20 17调整结构和参考文献； -控制变压器的新通用符号； -输出电压线性调节的电源单元的新符号。 根据IEC指南104，它具有团体安全出版物的地位。

IEC 61558-2-2:2022 is available as IEC 61558-2-2:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61558-2-2:2022 deals with the safety of control transformers and power supply units incorporating control transformers. Transformers incorporating electronic circuits are also covered by this document. This third edition cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- adjustment of structure and references in accordance with IEC 61558-1:2017;
- new general symbol for control transformers;
- new symbol for power supply unit with linearly regulated output voltage.
It has the status of a group safety publication in accordance with IEC Guide 104.