Test Instrument Reference

Data record instr.phase-sequence-indicator.before-connecting-motors

Verified 2026-10-27 Confidence: High

Phase rotation is verified at the supply before a motor is connected and again after a transformer bank or meter base is changed, because a motor run in reverse can destroy the driven equipment, as with a screw compressor whose internal oil pump does not pump backwards.

ProvenanceFluke application article supports data record instr.phase-sequence-indicator.before-connecting-motors, which is cited on the entry Phase sequence indicator.SOURCEFluke application articleFluke application articleManufacturer pageDATA RECORDinstr.phase-sequence-indicator.before-connecting-motorsinstr.phase-sequence-ind..Verified 2026-10-27ENTRYPhase sequence indicatorPhase sequence indicatorNo revisions
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.
StepItemDetail
SourceFluke application articleManufacturer page
Data recordinstr.phase-sequence-indicator.before-connecting-motorsVerified 2026-10-27
EntryPhase sequence indicatorNo revisions
Subject
Phase sequence indicator (Instrument classes)
Kind
Instrument fact
Source
Fluke application article, web page edition, Don't run it backwards (phase rotation testing in utility power distribution systems), Fluke. Publisher page

History

Every recorded change to this data record, oldest first.
DateChange
2026-10-27created
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.phase-sequence-indicator.before-connecting-motors." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/data/instr.phase-sequence-indicator.before-connecting-motors/.