Protective Relay Reference

Standards

The standards, specifications and codes that govern electrical testing, with edition history, status and scope recorded from the publishers.

Edition timelineIEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays: 1996, 20182000200520102015IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent RelaysIEEE C37.112-2018IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays1996IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays2018
Edition timeline. Editions recorded for each standard, from the publishers' catalogs. The filled dot marks the edition the publisher lists as current.
Edition timeline: edition years from the publishers' catalogs; editions without a four-digit year are listed but not plotted.
StandardEditionKindCurrentRecord
IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays1996Revision ofstd.ieee-c37-112.revision-of
IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays2018Approvalstd.ieee-c37-112.approved
  1. IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays

    In IEEE C37.112-2018 the time dial is the relay setting that fixes the integral quantity at which the relay operates, and so sets the time scale of the whole operate curve.