Data record `std.ieee-c57-12-90.structure.polarity`

Verified 2026-10-24 Confidence: High

Clause 6 of IEEE C57.12.90-2021 covers polarity and phase relation: Figures 2 and 3 define subtractive and additive polarity, the single-phase polarity methods are in clause 6.2 and the polyphase angular displacement and phase sequence methods are in clause 6.3.

Provenance. Where this record comes from and where it is used: the cited source, the record itself and the entry that cites it.

Provenance: the chain from source to entry.
Step	Item	Detail
Source	IEEE C57.12.90-2021	Licensed standard, clause 6
Data record	std.ieee-c57-12-90.structure.polarity	Verified 2026-10-24
Entry	IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers	No revisions

Subject: IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers (Standards)
Kind: Standard scope
Source: IEEE C57.12.90-2021, clause 6, Test Code for Liquid-Immersed Distribution, Power and Regulating Transformers, IEEE.

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-24	created
2026-10-24	revised
2026-10-24	review_status unreviewed -> software_reviewed

Cite this page

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

"Data record std.ieee-c57-12-90.structure.polarity." Transformer Testing Reference. 2026-10-24. https://www.transformertestingreference.com/data/std.ieee-c57-12-90.structure.polarity/.

Transformer Testing Reference, Data record std.ieee-c57-12-90.structure.polarity (Oct. 24, 2026), https://www.transformertestingreference.com/data/std.ieee-c57-12-90.structure.polarity/.

@misc{etr-data-std-ieee-c57-12-90-structure-polarity,
  title = {Data record std.ieee-c57-12-90.structure.polarity},
  howpublished = {\url{https://www.transformertestingreference.com/data/std.ieee-c57-12-90.structure.polarity/}},
  organization = {Transformer Testing Reference},
  publisher = {Transformer Testing Reference},
  year = {2026},
  note = {last substantive change 2026-10-24}
}

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