Power Quality Reference

Data record gloss.swell.ieee1159.definition

Verified 2026-10-27 Confidence: High

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.

ProvenanceIEEE 1159-2019 supports data record gloss.swell.ieee1159.definition, which is cited on the entry Swell.SOURCEIEEE 1159-2019IEEE 1159-2019Licensed standard, clause 4.4.2.3DATA RECORDgloss.swell.ieee1159.definitiongloss.swell.ieee1159.def..Verified 2026-10-27ENTRYSwellSwellNo revisions
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StepItemDetail
SourceIEEE 1159-2019Licensed standard, clause 4.4.2.3
Data recordgloss.swell.ieee1159.definitionVerified 2026-10-27
EntrySwellNo revisions
Subject
Swell (Glossary)
Kind
Definition
Source
IEEE 1159-2019, clause 4.4.2.3, Recommended Practice for Monitoring Electric Power Quality, IEEE. Publisher pagePublisher information page

History

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

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