Electrical Testing Reference

Data record tests.winding-resistance.ieeec57-12-90.cold-temperature

Verified 2026-10-24 Confidence: High

Clause 5.1 of IEEE C57.12.90-2021 lets the winding temperature for a resistance measurement be taken as the average liquid temperature only after the transformer has stood without excitation or load current for a stated settling period and the top-to-bottom liquid temperature difference is inside a stated limit; windings out of liquid take the average of several thermometers or thermocouples set among the coils and touching the conductors.

ProvenanceIEEE C57.12.90-2021 supports data record tests.winding-resistance.ieeec57-12-90.cold-temperature, which is cited on the entry Winding Resistance.SOURCEIEEE C57.12.90-2021IEEE C57.12.90-2021Licensed standard, clause 5.1DATA RECORDtests.winding-resistance.ieeec57-12-90.cold-temperaturetests.winding-resistance..Verified 2026-10-24ENTRYWinding ResistanceWinding ResistanceNo revisions
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StepItemDetail
SourceIEEE C57.12.90-2021Licensed standard, clause 5.1
Data recordtests.winding-resistance.ieeec57-12-90.cold-temperatureVerified 2026-10-24
EntryWinding ResistanceNo revisions
Subject
Winding Resistance (Test methods)
Kind
Method fact
Source
IEEE C57.12.90-2021, clause 5.1, 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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"Data record tests.winding-resistance.ieeec57-12-90.cold-temperature." Electrical Testing Reference. 2026-10-24. https://www.electricaltestingreference.com/data/tests.winding-resistance.ieeec57-12-90.cold-temperature/.