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  • IEEE C37.112 : 1996

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    INVERSE-TIME CHARACTERISTIC EQUATIONS FOR OVERCURRENT RELAYS

    Available format(s):  Hardcopy, PDF

    Superseded date:  02-05-2018

    Language(s):  English

    Published date:  01-01-1996

    Publisher:  Institute of Electrical & Electronics Engineers

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    Table of Contents - (Show below) - (Hide below)

    1 Overview
      1.1 Scope
      1.2 Purpose
    2 References
    3 Definitions
    4 The time-current equation
      4.1 Coordination of inverse time-current characteristics
      4.2 The analytic equation
      4.3 Time dial
      4.4 Standard time-current characteristics
    Annex A (Informative) - Derivation of the induction
                            characteristic
    Annex B (Informative) - Bibliography

    Abstract - (Show below) - (Hide below)

    Reviews various existing analytic techniques for representation of relay operating characteristic curved shapes and gives typical operating characteristic curve shapes for standardizing available inverse-time relay characteristics in microprocessor or computer relay applications.

    General Product Information - (Show below) - (Hide below)

    Document Type Standard
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    IEEE C37.113-1999 GUIDE FOR PROTECTIVE RELAY APPLICATIONS TO TRANSMISSION LINES
    IEEE DRAFT C37.91 : D7.0 2006 PROTECTING POWER TRANSFORMERS
    IEEE C37.91 : 2008 PROTECTING POWER TRANSFORMERS
    IEEE 421.5 : 2005 RECOMMENDED PRACTICE FOR EXCITATION SYSTEM MODELS FOR POWER SYSTEM STABILITY STUDIES

    Standards Referencing This Book - (Show below) - (Hide below)

    IEEE C37.90-2005 IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus
    IEC 60255-3:1989 Electrical relays - Part 3: Single input energizing quantity measuring relays with dependent or independent time
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