Data record `tests.insulation-power-factor-dissipation-factor.ieeec57-12-90.connections`

Verified 2026-10-24 Confidence: High

Table 4 of IEEE C57.12.90-2021 lists the insulation power-factor test connections for two-winding and three-winding transformers, with and without a guard circuit, and its footnote treats permanently connected windings such as those of autotransformers and regulators as a single winding.

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 10.10.4, Table 4
Data record	tests.insulation-power-factor-dissipation-factor.ieeec57-12-90.connections	Verified 2026-10-24
Entry	Insulation Power Factor Dissipation Factor	No revisions

Subject: Insulation Power Factor Dissipation Factor (Test methods)
Kind: Method fact
Source: IEEE C57.12.90-2021, clause 10.10.4, Table 4, 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

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

"Data record tests.insulation-power-factor-dissipation-factor.ieeec57-12-90.connections." Electrical Testing Reference. 2026-10-24. https://www.electricaltestingreference.com/data/tests.insulation-power-factor-dissipation-factor.ieeec57-12-90.connections/.

Electrical Testing Reference, Data record tests.insulation-power-factor-dissipation-factor.ieeec57-12-90.connections (Oct. 24, 2026), https://www.electricaltestingreference.com/data/tests.insulation-power-factor-dissipation-factor.ieeec57-12-90.connections/.

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

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