Data record `tests.relay-81-frequency-test.ieee1547-1.type-test-requirements`

Verified 2026-10-24 Confidence: Medium

Clause 5.5.1.5 of IEEE 1547.1-2020 requires that the rate of change of frequency during the test transitions stay below the category limit of IEEE 1547-2018 Table 21 or within the unit's demonstrated capability, and that the power level be high enough to separate the trip response from the frequency droop response; the pass criterion has the same form as the voltage trip criterion, and tripping inside the regions where IEEE 1547-2018 Annex H.3 allows either ride-through or trip is accepted.

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 1547.1-2020	Licensed standard, clause 5.5.1.5, 5.5.2.5
Data record	tests.relay-81-frequency-test.ieee1547-1.type-test-requirements	Verified 2026-10-24
Entry	Relay 81 Frequency Test	No revisions

Subject: Relay 81 Frequency Test (Test methods)
Kind: Method fact
Source: IEEE 1547.1-2020, clause 5.5.1.5, 5.5.2.5, Conformance Test Procedures for Equipment Interconnecting Distributed Energy Resources, 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.ieee1547-1.type-test-requirements." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/tests.relay-81-frequency-test.ieee1547-1.type-test-requirements/.

Protective Relay Reference, Data record tests.relay-81-frequency-test.ieee1547-1.type-test-requirements (Oct. 24, 2026), https://www.protectiverelayreference.com/data/tests.relay-81-frequency-test.ieee1547-1.type-test-requirements/.

@misc{etr-data-tests-relay-81-frequency-test-ieee1547-1-type-test-requirements,
  title = {Data record tests.relay-81-frequency-test.ieee1547-1.type-test-requirements},
  howpublished = {\url{https://www.protectiverelayreference.com/data/tests.relay-81-frequency-test.ieee1547-1.type-test-requirements/}},
  organization = {Protective Relay Reference},
  publisher = {Protective Relay Reference},
  year = {2026},
  note = {last substantive change 2026-10-24}
}

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