Test Instrument Reference

Data record instr.winding-resistance-meter.tap-changer-stepping

Verified 2026-10-27 Confidence: High

When winding resistance is measured by winding on a transformer with an on-load tap changer, the test current is kept flowing while the tap changer is stepped through its positions, so every tap is measured from one connection, the core stays saturated after the first reading, and an interruption of the current during a tap change reveals a tap changer that fails to make before it breaks.

ProvenanceMegger product page supports data record instr.winding-resistance-meter.tap-changer-stepping, which is cited on the entry Winding resistance meter.SOURCEMegger product pageMegger product pageManufacturer pageDATA RECORDinstr.winding-resistance-meter.tap-changer-steppinginstr.winding-resistance..Verified 2026-10-27ENTRYWinding resistance meterWinding resistance meterNo revisions
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StepItemDetail
SourceMegger product pageManufacturer page
Data recordinstr.winding-resistance-meter.tap-changer-steppingVerified 2026-10-27
EntryWinding resistance meterNo revisions
Subject
Winding resistance meter (Instrument classes)
Kind
Instrument fact
Source
Megger product page, web page edition, TRAX Multifunction transformer and substation test system, Megger. Publisher page

History

Every recorded change to this data record, oldest first.
DateChange
2026-10-27created
2026-10-27revised
2026-10-27review_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 instr.winding-resistance-meter.tap-changer-stepping." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/data/instr.winding-resistance-meter.tap-changer-stepping/.