Data record `tests.relay-25-sync-check-test.ieee1547.synchronization`

Verified 2026-10-24 Confidence: High

For distributed energy resources that produce a fundamental voltage before connecting, such as synchronous generators, grid-forming inverters and self-excited induction generators, clause 4.10.4 and Table 5 of IEEE 1547-2018 set maximum frequency, voltage and phase angle differences at the moment of paralleling, tiered by aggregate DER rating, and limit the voltage step the paralleling may cause at the point of common coupling; the area electric power system operator may waive the differences where paralleling meets the rapid voltage change limit of clause 7.2.

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 4.10.4, Table 5
Data record	tests.relay-25-sync-check-test.ieee1547.synchronization	Verified 2026-10-24
Entry	Relay 25 Sync Check Test	No revisions

Subject: Relay 25 Sync Check Test (Test methods)
Kind: Method fact
Source: IEEE 1547-2018, clause 4.10.4, Table 5, 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	review_status unreviewed -> software_reviewed

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

"Data record tests.relay-25-sync-check-test.ieee1547.synchronization." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/tests.relay-25-sync-check-test.ieee1547.synchronization/.

Protective Relay Reference, Data record tests.relay-25-sync-check-test.ieee1547.synchronization (Oct. 24, 2026), https://www.protectiverelayreference.com/data/tests.relay-25-sync-check-test.ieee1547.synchronization/.

@misc{etr-data-tests-relay-25-sync-check-test-ieee1547-synchronization,
  title = {Data record tests.relay-25-sync-check-test.ieee1547.synchronization},
  howpublished = {\url{https://www.protectiverelayreference.com/data/tests.relay-25-sync-check-test.ieee1547.synchronization/}},
  organization = {Protective Relay Reference},
  publisher = {Protective Relay Reference},
  year = {2026},
  note = {last substantive change 2026-10-24}
}

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