Data record `std.ieee-1159.structure.imbalance`

Verified 2026-10-27 Confidence: High

Clause 4.4.4 of IEEE 1159-2019 prefers the negative to positive sequence ratio as the definition of imbalance, acknowledges that many instruments use the ANSI C84.1 maximum deviation from the average of phase-to-phase voltages, gives equations that compute the sequence ratio from phase-to-phase rms magnitudes alone where zero sequence is absent, and cautions the reader to check which definition a monitor uses.

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	IEEE 1159-2019	Licensed standard, clause 4.4.4
Data record	std.ieee-1159.structure.imbalance	Verified 2026-10-27
Entry	IEEE Recommended Practice for Monitoring Electric Power Quality	No revisions

Subject: IEEE Recommended Practice for Monitoring Electric Power Quality (Standards)
Kind: Standard scope
Source: IEEE 1159-2019, clause 4.4.4, Recommended Practice for Monitoring Electric Power Quality, IEEE. Publisher page Publisher information page

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-27	created

Cite this page

Cite the governing standard for the fact itself; cite this page as the finding aid.

"Data record std.ieee-1159.structure.imbalance." Power Quality Reference. 2026-10-27. https://www.powerqualityreference.com/data/std.ieee-1159.structure.imbalance/.

Power Quality Reference, Data record std.ieee-1159.structure.imbalance (Oct. 27, 2026), https://www.powerqualityreference.com/data/std.ieee-1159.structure.imbalance/.

@misc{etr-data-std-ieee-1159-structure-imbalance,
  title = {Data record std.ieee-1159.structure.imbalance},
  howpublished = {\url{https://www.powerqualityreference.com/data/std.ieee-1159.structure.imbalance/}},
  organization = {Power Quality Reference},
  publisher = {Power Quality Reference},
  year = {2026},
  note = {last substantive change 2026-10-27}
}

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