Data record `tests.relay-27-undervoltage-test.ieee1547.trip-requirements`

Verified 2026-10-24 Confidence: Medium

For distributed energy resources, clause 6.4.1 of IEEE 1547-2018 sets mandatory undervoltage tripping through two functions, UV1 and UV2, each with a default voltage, a default clearing time and a range of allowable settings that depends on the abnormal performance category (Table 11, Table 12 or Table 13, the last as amended by IEEE 1547a-2020). Under clause 4.3 the undervoltage functions respond to whichever applicable voltage is lowest in relation to nominal.

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 1547-2018	Licensed standard, clause 6.4.1, 4.3
Data record	tests.relay-27-undervoltage-test.ieee1547.trip-requirements	Verified 2026-10-24
Entry	Relay 27 Undervoltage Test	No revisions

Subject: Relay 27 Undervoltage Test (Test methods)
Kind: Method fact
Source: IEEE 1547-2018, clause 6.4.1, 4.3, Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces, IEEE.

History

Every recorded change to this data record, oldest first.
Date	Change
2026-10-24	created
2026-10-24	revised
2026-10-24	review_status unreviewed -> software_reviewed

Cite this page

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

"Data record tests.relay-27-undervoltage-test.ieee1547.trip-requirements." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/tests.relay-27-undervoltage-test.ieee1547.trip-requirements/.

Protective Relay Reference, Data record tests.relay-27-undervoltage-test.ieee1547.trip-requirements (Oct. 24, 2026), https://www.protectiverelayreference.com/data/tests.relay-27-undervoltage-test.ieee1547.trip-requirements/.

@misc{etr-data-tests-relay-27-undervoltage-test-ieee1547-trip-requirements,
  title = {Data record tests.relay-27-undervoltage-test.ieee1547.trip-requirements},
  howpublished = {\url{https://www.protectiverelayreference.com/data/tests.relay-27-undervoltage-test.ieee1547.trip-requirements/}},
  organization = {Protective Relay Reference},
  publisher = {Protective Relay Reference},
  year = {2026},
  note = {last substantive change 2026-10-24}
}

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