Data record `tests.polarity-test.ieeec57-12-90.phase-relation`

Verified 2026-10-24 Confidence: Medium

Clause 6.3 of IEEE C57.12.90-2021 determines the angular displacement and phase sequence of polyphase transformers by phasor-diagram methods; polarity and phase relation carry no tolerance, since the result either matches the nameplate or does not.

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, 6.3
Data record	tests.polarity-test.ieeec57-12-90.phase-relation	Verified 2026-10-24
Entry	Polarity Test	No revisions

Subject: Polarity Test (Test methods)
Kind: Method fact
Source: IEEE C57.12.90-2021, clause 6, 6.3, 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	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 tests.polarity-test.ieeec57-12-90.phase-relation." Electrical Testing Reference. 2026-10-24. https://www.electricaltestingreference.com/data/tests.polarity-test.ieeec57-12-90.phase-relation/.

Electrical Testing Reference, Data record tests.polarity-test.ieeec57-12-90.phase-relation (Oct. 24, 2026), https://www.electricaltestingreference.com/data/tests.polarity-test.ieeec57-12-90.phase-relation/.

@misc{etr-data-tests-polarity-test-ieeec57-12-90-phase-relation,
  title = {Data record tests.polarity-test.ieeec57-12-90.phase-relation},
  howpublished = {\url{https://www.electricaltestingreference.com/data/tests.polarity-test.ieeec57-12-90.phase-relation/}},
  organization = {Electrical Testing Reference},
  publisher = {Electrical Testing Reference},
  year = {2026},
  note = {last substantive change 2026-10-24}
}

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