Swell
Updated 2026-10-27
Data records
- In IEEE 1159-2019 a swell is an increase of the rms voltage or current above the nominal range that lasts within the short-duration band of clause 3; swells are rarer than sags, arise on the unfaulted phases during a single line-to-ground fault, from switching off a large load or from energizing a large capacitor bank, and the term momentary overvoltage is deprecated as a synonym.
Sources
- IEEE 1159-2019, Recommended Practice for Monitoring Electric Power Quality, 2019 edition, IEEE. Cited: clause 4.4.2.3. Held as: Purchased single-user copy. Publisher page for IEEE 1159-2019Publisher information page
Obtaining the documents
- IEEE 1159-2019: available from the publisher
Changelog (1 entry)
| Date | Revision | Change |
|---|---|---|
| 2026-10-27 | created (gloss.swell.ieee1159.definition) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"Swell." Power Quality Reference. 2026-10-27. https://www.powerqualityreference.com/glossary/swell/.
Power Quality Reference, Swell (Oct. 27, 2026), https://www.powerqualityreference.com/glossary/swell/.
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title = {Swell},
howpublished = {\url{https://www.powerqualityreference.com/glossary/swell/}},
organization = {Power Quality Reference},
publisher = {Power Quality Reference},
year = {2026},
note = {last substantive change 2026-10-27}
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