Protective Relay Reference

Data record std.ieee-c37-112.time-dial-scaling

Verified 2026-10-24 Confidence: High

Clause 3.3 of IEEE C37.112-2018 states that the time dial scales the two trip constants and the reset constant together, each in direct proportion to the dial setting, and that a microprocessor relay holds the ratio of the two trip constants fixed whereas an induction relay may let it drift somewhat.

ProvenanceIEEE C37.112-2018 supports data record std.ieee-c37-112.time-dial-scaling, 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 3.3DATA RECORDstd.ieee-c37-112.time-dial-scalingstd.ieee-c37-112.time-di..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 3.3
Data recordstd.ieee-c37-112.time-dial-scalingVerified 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 3.3, 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
2026-10-24revised
2026-10-24review_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 std.ieee-c37-112.time-dial-scaling." Protective Relay Reference. 2026-10-24. https://www.protectiverelayreference.com/data/std.ieee-c37-112.time-dial-scaling/.