Protective Relay Reference

Data record std.ieee-c37-112.curve-families

Verified 2026-10-24 Confidence: High

Table 1 of IEEE C37.112-2018 lists the trip constants and the optional reset constant of three standard characteristics named moderately inverse, very inverse and extremely inverse; the standard defines no other curve families, so short-time, definite-time and IEC shapes lie outside it.

ProvenanceIEEE C37.112-2018 supports data record std.ieee-c37-112.curve-families, 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 3.4, Table 1DATA RECORDstd.ieee-c37-112.curve-familiesstd.ieee-c37-112.curve-f..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 3.4, Table 1
Data recordstd.ieee-c37-112.curve-familiesVerified 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 3.4, Table 1, 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.curve-families." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/std.ieee-c37-112.curve-families/.