Protective Relay Reference

Data record std.ieee-c37-112.constants-basis

Verified 2026-10-24 Confidence: Medium

The constants in Table 1 of IEEE C37.112-2018 represent the mean of the induction-relay characteristics analyzed in Annex A, and their digits are chosen so that a change in the last digit moves the relative operate time by only a small fraction over the stated range of multiples of pickup.

ProvenanceIEEE C37.112-2018 supports data record std.ieee-c37-112.constants-basis, which is cited on the entry IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays.SOURCEIEEE C37.112-2018IEEE C37.112-2018Licensed standard, clause Table 1, Annex ADATA RECORDstd.ieee-c37-112.constants-basisstd.ieee-c37-112.constan..Verified 2026-10-24ENTRYIEEE Standard for Inverse-Time Characteristics Equations for Overcurrent RelaysIEEE Standard for Invers..No revisions
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StepItemDetail
SourceIEEE C37.112-2018Licensed standard, clause Table 1, Annex A
Data recordstd.ieee-c37-112.constants-basisVerified 2026-10-24
EntryIEEE Standard for Inverse-Time Characteristics Equations for Overcurrent RelaysNo revisions
Subject
IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays (Standards)
Kind
Standard scope
Source
IEEE C37.112-2018, clause Table 1, Annex A, IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays, IEEE.

History

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DateChange
2026-10-24created
2026-10-24review_status unreviewed -> software_reviewed

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"Data record std.ieee-c37-112.constants-basis." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/std.ieee-c37-112.constants-basis/.