Protective Relay Reference

Data record std.ieee-c37-112.bands-not-tolerance

Verified 2026-10-24 Confidence: High

IEEE C37.112-2018 states in clause 3.4 that its conformance bands are templates for classifying the shape of a curve and are not tolerance bands for timing accuracy or repeatability; the standard gives no timing-accuracy figure, which remains a manufacturer claim for each relay.

ProvenanceIEEE C37.112-2018 supports data record std.ieee-c37-112.bands-not-tolerance, 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 3.4DATA RECORDstd.ieee-c37-112.bands-not-tolerancestd.ieee-c37-112.bands-n..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
Data recordstd.ieee-c37-112.bands-not-toleranceVerified 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, IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays, IEEE.

History

Every recorded change to this data record, oldest first.
DateChange
2026-10-24created
2026-10-24review_status unreviewed -> software_reviewed

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"Data record std.ieee-c37-112.bands-not-tolerance." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/std.ieee-c37-112.bands-not-tolerance/.