Data record `tests.transformer-turns-ratio.ieeec57-12-90.methods`

Verified 2026-10-24 Confidence: High

Clause 7.3 of IEEE C57.12.90-2021 gives three ratio methods: two voltmeters read simultaneously and then interchanged, comparison against a transformer of known ratio, and a ratio meter based on a resistance potentiometer circuit that can also indicate polarity, phase relation and phase sequence.

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 7.3
Data record	tests.transformer-turns-ratio.ieeec57-12-90.methods	Verified 2026-10-24
Entry	Transformer Turns Ratio	No revisions

Subject: Transformer Turns Ratio (Test methods)
Kind: Method fact
Source: IEEE C57.12.90-2021, clause 7.3, 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.transformer-turns-ratio.ieeec57-12-90.methods." Transformer Testing Reference. 2026-10-24. https://www.transformertestingreference.com/data/tests.transformer-turns-ratio.ieeec57-12-90.methods/.

Transformer Testing Reference, Data record tests.transformer-turns-ratio.ieeec57-12-90.methods (Oct. 24, 2026), https://www.transformertestingreference.com/data/tests.transformer-turns-ratio.ieeec57-12-90.methods/.

@misc{etr-data-tests-transformer-turns-ratio-ieeec57-12-90-methods,
  title = {Data record tests.transformer-turns-ratio.ieeec57-12-90.methods},
  howpublished = {\url{https://www.transformertestingreference.com/data/tests.transformer-turns-ratio.ieeec57-12-90.methods/}},
  organization = {Transformer Testing Reference},
  publisher = {Transformer Testing Reference},
  year = {2026},
  note = {last substantive change 2026-10-24}
}

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