Undervoltage
Updated 2026-10-27
Data records
- In IEEE 1159-2019 an undervoltage is a long-duration decrease of the rms voltage below the nominal range, caused by the opposite events to those that cause overvoltage, such as a load switching on, a capacitor bank switching off or an overloaded circuit; the term brownout is deprecated.
Sources
- IEEE 1159-2019, Recommended Practice for Monitoring Electric Power Quality, 2019 edition, IEEE. Cited: clause 4.4.3.2. 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.undervoltage.ieee1159.definition) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"Undervoltage." Power Quality Reference. 2026-10-27. https://www.powerqualityreference.com/glossary/undervoltage/.
Power Quality Reference, Undervoltage (Oct. 27, 2026), https://www.powerqualityreference.com/glossary/undervoltage/.
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title = {Undervoltage},
howpublished = {\url{https://www.powerqualityreference.com/glossary/undervoltage/}},
organization = {Power Quality Reference},
publisher = {Power Quality Reference},
year = {2026},
note = {last substantive change 2026-10-27}
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