Data record `instr.transformer-turns-ratio-tester.vector-group-detection`

Verified 2026-10-27 Confidence: High

Three-phase turns ratio test sets detect the three-phase transformer connection type automatically from a catalog of types covering the ANSI, IEC and Australian conventions, display winding polarity alongside ratio, phase angle and excitation current, and provide control of an on-load tap changer.

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	Doble (Vanguard Instruments) product page	Manufacturer page
Data record	instr.transformer-turns-ratio-tester.vector-group-detection	Verified 2026-10-27
Entry	Transformer turns ratio tester	No revisions

Subject: Transformer turns ratio tester (Instrument classes)
Kind: Instrument fact
Source: Doble (Vanguard Instruments) product page, web page edition, TRF-250 automatic 3-phase transformer turns ratio test set with LTC control, Doble Engineering Company. Publisher page

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-27	created
2026-10-27	revised
2026-10-27	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 instr.transformer-turns-ratio-tester.vector-group-detection." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/data/instr.transformer-turns-ratio-tester.vector-group-detection/.

Test Instrument Reference, Data record instr.transformer-turns-ratio-tester.vector-group-detection (Oct. 27, 2026), https://www.testinstrumentreference.com/data/instr.transformer-turns-ratio-tester.vector-group-detection/.

@misc{etr-data-instr-transformer-turns-ratio-tester-vector-group-detection,
  title = {Data record instr.transformer-turns-ratio-tester.vector-group-detection},
  howpublished = {\url{https://www.testinstrumentreference.com/data/instr.transformer-turns-ratio-tester.vector-group-detection/}},
  organization = {Test Instrument Reference},
  publisher = {Test Instrument Reference},
  year = {2026},
  note = {last substantive change 2026-10-27}
}

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