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IEEE C57.12.91-2026
IEEE Standard Test Code for Dry-Type Distribution and Power Transformers
Revision Active STD To reflect current practice in the testing procedures of dry-type transformers, substantive changes to Clause 5, Clause 8, Clause 9, Clause 10, Clause 11,and Clause 12 of IEEE Std C57.12.91™-2020 have been made in this revision. Transformer requirements and specific test criteria are not addressed; rather, they are contained in appropriate standards such as IEEE Std C57.12.01™ or in user specifications.
Institute of Electrical and Electronics Engineers [ieee]