Electrical Testing Reference

Data record tests.winding-resistance.ieeec57-12-90.readings

Verified 2026-10-24 Confidence: High

Clause 5.3.1 of IEEE C57.12.90-2021 takes readings only after the current and voltage have settled, averages several readings, limits the test current to a stated fraction of the rated winding current so that heating does not change the resistance, and magnetizes the core to saturation with direct current first so that a cold measurement and a hot measurement start from the same residual flux.

ProvenanceIEEE C57.12.90-2021 supports data record tests.winding-resistance.ieeec57-12-90.readings, which is cited on the entry Winding Resistance.SOURCEIEEE C57.12.90-2021IEEE C57.12.90-2021Licensed standard, clause 5.3.1DATA RECORDtests.winding-resistance.ieeec57-12-90.readingstests.winding-resistance..Verified 2026-10-24ENTRYWinding ResistanceWinding ResistanceNo revisions
Provenance. Where this record comes from and where it is used: the cited source, the record itself and the entry that cites it.
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StepItemDetail
SourceIEEE C57.12.90-2021Licensed standard, clause 5.3.1
Data recordtests.winding-resistance.ieeec57-12-90.readingsVerified 2026-10-24
EntryWinding ResistanceNo revisions
Subject
Winding Resistance (Test methods)
Kind
Method fact
Source
IEEE C57.12.90-2021, clause 5.3.1, Test Code for Liquid-Immersed Distribution, Power and Regulating Transformers, IEEE.

History

Every recorded change to this data record, oldest first.
DateChange
2026-10-24created
2026-10-24revised
2026-10-24review_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.winding-resistance.ieeec57-12-90.readings." Electrical Testing Reference. 2026-10-24. https://www.electricaltestingreference.com/data/tests.winding-resistance.ieeec57-12-90.readings/.