IEEE Standard Test Code for Dry-Type Distribution and Power Transformers

Name: IEEE Standard Test Code for Dry-Type Distribution and Power Transformers
Creator: Transformer Testing Reference
License: https://www.transformertestingreference.com/license/

Updated 2026-10-13

Edition timeline. Editions recorded for this standard from the publisher's catalog. The filled dot marks the edition listed as current.

Edition timeline: edition years from the publishers' catalogs; editions without a four-digit year are listed but not plotted.
Standard	Edition	Kind	Current	Record
IEEE Standard Test Code for Dry-Type Distribution and Power Transformers	2020	Edition		std.ieee-c57-12-91.edition.2020

Data records

IEEE C57.12.91-2020 is the designation of the document titled IEEE Standard Test Code for Dry-Type Distribution and Power Transformers. Value: IEEE C57.12.91-2020. Source: IEEE C57.12.91-2020. Verified 2026-10-13. Record std.ieee-c57-12-91.designation
IEEE C57.12.91-2020 is the 2020 edition of the IEEE document titled IEEE Standard Test Code for Dry-Type Distribution and Power Transformers, published on 2021-01-28. Value: 2020. Source: IEEE C57.12.91-2020. Verified 2026-10-13. Record std.ieee-c57-12-91.edition.2020
The test code describes test procedures for dry-type distribution and power transformers, and it leaves performance requirements and pass criteria to other standards or to user specifications. Source: IEEE C57.12.91-2020. Verified 2026-10-13. Record std.ieee-c57-12-91.scope
The IEEE catalog lists IEEE C57.12.91-2020 with the status Superseded Standard, superseded by C57.12.91-2026. Value: Superseded Standard. Source: IEEE C57.12.91-2020. Verified 2026-10-13. Record std.ieee-c57-12-91.status
The publisher catalog gives the full title of IEEE C57.12.91-2020 as IEEE Standard Test Code for Dry-Type Distribution and Power Transformers. Value: IEEE Standard Test Code for Dry-Type Distribution and Power Transformers. Source: IEEE C57.12.91-2020. Verified 2026-10-13. Record std.ieee-c57-12-91.title

Sources

IEEE C57.12.91-2020, IEEE Standard Test Code for Dry-Type Distribution and Power Transformers, 2020 edition, IEEE. Held as: Public page. Publisher page

Obtaining the documents

IEEE C57.12.91-2020: publisher catalog or sales page

Changelog (9 entries)

Date	Revision	Change
2026-10-13		created (std.ieee-c57-12-91.designation)
2026-10-13		created (std.ieee-c57-12-91.edition.2020)
2026-10-13		reviewed (std.ieee-c57-12-91.edition.2020)
2026-10-13		created (std.ieee-c57-12-91.scope)
2026-10-13		reviewed (std.ieee-c57-12-91.scope)
2026-10-13		created (std.ieee-c57-12-91.status)
2026-10-13		reviewed (std.ieee-c57-12-91.status)
2026-10-13		created (std.ieee-c57-12-91.title)
2026-10-13		reviewed (std.ieee-c57-12-91.title)

Cite this page

Cite the governing standard for the fact itself; cite this page as the finding aid.

"IEEE Standard Test Code for Dry-Type Distribution and Power Transformers." Transformer Testing Reference. 2026-10-13. https://www.transformertestingreference.com/standards/ieee-c57-12-91/.

Transformer Testing Reference, IEEE Standard Test Code for Dry-Type Distribution and Power Transformers (Oct. 13, 2026), https://www.transformertestingreference.com/standards/ieee-c57-12-91/.

@misc{etr-standards-ieee-c57-12-91,
  title = {IEEE Standard Test Code for Dry-Type Distribution and Power Transformers},
  howpublished = {\url{https://www.transformertestingreference.com/standards/ieee-c57-12-91/}},
  organization = {Transformer Testing Reference},
  publisher = {Transformer Testing Reference},
  year = {2026},
  note = {last substantive change 2026-10-13}
}

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