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IEC 61558-2-2

IEC 61558-2-2:2022
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-2: Particular requirements and tests for control transformers and power supply units incorporating control transformers
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.
Redline version

All the changes between the new edition and previous edition of the publication are highlighted with track changes mode.

Extended version

Contains the references made to another standard inserted appropriately into its content and highlighted for easy identification.


Technical committee

TC 96 Transformers, reactors, power supply units, and combinations thereof


Horizontal standard - Safety - Group Safety
Publication typeInternational Standard
Publication date2022-10-19


Stability date2025
ISBN number9782832258095
File size722.18 KB
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