Data record `instr.primary-injection-test-set.ct-ratio-and-polarity`

Verified 2026-10-27 Confidence: High

For a current transformer, current is injected into the primary winding and the resulting secondary current is measured, which gives the ratio, polarity and phase angle under real loading; the set reads the turns ratio directly and a switch box lets several secondary taps be measured in turn.

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	Megger product page	Manufacturer page
Data record	instr.primary-injection-test-set.ct-ratio-and-polarity	Verified 2026-10-27
Entry	Primary injection test set	No revisions

Subject: Primary injection test set (Instrument classes)
Kind: Instrument fact
Source: Megger product page, web page edition, ODEN AT primary current injection test system, Megger. Publisher page

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-27	created
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.primary-injection-test-set.ct-ratio-and-polarity." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/data/instr.primary-injection-test-set.ct-ratio-and-polarity/.

Test Instrument Reference, Data record instr.primary-injection-test-set.ct-ratio-and-polarity (Oct. 27, 2026), https://www.testinstrumentreference.com/data/instr.primary-injection-test-set.ct-ratio-and-polarity/.

@misc{etr-data-instr-primary-injection-test-set-ct-ratio-and-polarity,
  title = {Data record instr.primary-injection-test-set.ct-ratio-and-polarity},
  howpublished = {\url{https://www.testinstrumentreference.com/data/instr.primary-injection-test-set.ct-ratio-and-polarity/}},
  organization = {Test Instrument Reference},
  publisher = {Test Instrument Reference},
  year = {2026},
  note = {last substantive change 2026-10-27}
}

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