DC offset
Updated 2026-10-27
Data records
- In IEEE 1159-2019 dc offset is the presence of a dc voltage or current in an ac power system, arising from geomagnetic disturbances or half-wave rectification, and harmful because it drives transformer saturation and heating.
- IEEE 519-2022 does not allow current distortion that results in a dc offset, such as that from half-wave converters, in any of its current distortion limit tables.
- The term is written DC offset. Value: DC offset.
Sources
- Electrical Testing Reference editorial taxonomy, Electrical Testing Reference editorial taxonomy of test methods, 2026-10 edition, Electrical Testing Reference. Held as: Own observation.
- IEEE 1159-2019, Recommended Practice for Monitoring Electric Power Quality, 2019 edition, IEEE. Cited: clause 4.4.5.1. Held as: Purchased single-user copy. Publisher page for IEEE 1159-2019Publisher information page
- IEEE 519-2022, Harmonic Control in Electric Power Systems, 2022 edition, IEEE. Cited: clause 5.3. Held as: Purchased single-user copy. Publisher page for IEEE 519-2022Publisher information page
Obtaining the documents
- IEEE 1159-2019: available from the publisher
- IEEE 519-2022: available from the publisher
Changelog (3 entries)
| Date | Revision | Change |
|---|---|---|
| 2026-10-27 | created (gloss.dc-offset.ieee1159.definition) | |
| 2026-10-27 | created (gloss.dc-offset.ieee519.prohibition) | |
| 2026-10-27 | created (gloss.dc-offset.title) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"DC offset." Power Quality Reference. 2026-10-27. https://www.powerqualityreference.com/glossary/dc-offset/.
Power Quality Reference, DC offset (Oct. 27, 2026), https://www.powerqualityreference.com/glossary/dc-offset/.
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title = {DC offset},
howpublished = {\url{https://www.powerqualityreference.com/glossary/dc-offset/}},
organization = {Power Quality Reference},
publisher = {Power Quality Reference},
year = {2026},
note = {last substantive change 2026-10-27}
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