Data record `tests.relay-81-frequency-test.ieee1547.trip-requirements`

Verified 2026-10-24 Confidence: High

For distributed energy resources, clause 6.5.1 and Table 18 of IEEE 1547-2018 set mandatory frequency tripping through two overfrequency functions and two underfrequency functions, with one set of defaults and allowable ranges shared by all three abnormal performance categories; the area electric power system operator specifies the settings after coordinating with the regional reliability coordinator, and the function applies only while the fundamental voltage exceeds a threshold the clause states.

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 6.5.1, Table 18
Data record	tests.relay-81-frequency-test.ieee1547.trip-requirements	Verified 2026-10-24
Entry	Relay 81 Frequency Test	No revisions

Subject: Relay 81 Frequency Test (Test methods)
Kind: Method fact
Source: IEEE 1547-2018, clause 6.5.1, Table 18, 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-81-frequency-test.ieee1547.trip-requirements." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/tests.relay-81-frequency-test.ieee1547.trip-requirements/.

Protective Relay Reference, Data record tests.relay-81-frequency-test.ieee1547.trip-requirements (Oct. 24, 2026), https://www.protectiverelayreference.com/data/tests.relay-81-frequency-test.ieee1547.trip-requirements/.

@misc{etr-data-tests-relay-81-frequency-test-ieee1547-trip-requirements,
  title = {Data record tests.relay-81-frequency-test.ieee1547.trip-requirements},
  howpublished = {\url{https://www.protectiverelayreference.com/data/tests.relay-81-frequency-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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