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About This Item

 

Full Description

Scope

This standard specifies design tests for relays and relay systems that relate to the immunity of this equipment to repetitive electrical transients. Two types of tests are specified. The oscillatory and fast transient SWC tests are defined as distinct tests. However, it is not intended to prohibit a combined test, provided all requirements of the individual SWC tests are met. The application of SWC tests to equipment other than relays and relay systems is the responsibility of those specifying the testing.

Purpose

This standard establishes a common and reproducible basis for evaluating the performance of relays and relay systems when subjected to repetitive transients on supply, signal, control, and communication lines or connections. This standard establishes that an evaluation is performed during both normal (non-tripped) and abnormal (tripped) relay operating conditions.

Abstract

Revision Standard - Active. Two types of design tests for relays and relay systems that relate to the immunity of this equipment to repetitive electrical transients are specified. Test generator characteristics, test waveforms, selection of equipment terminals on which tests are to be conducted, test procedures, criteria for acceptance and documentation of test results are described. This standard has been harmonized with IEC standards where consensus could be reached. An errata is available for this standard at http://standards.ieee.org/findstds/errata/C37.90.1-2012.pdf
 

Document History

  1. IEEE C37.90.1-2012

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    IEEE Standard for Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus

    • Most Recent
  2. IEEE C37.90.1-2002


    IEEE Standard Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus

    • Historical Version
  3. IEEE C37.90.1-1989


    IEEE Standard Surge Withstand Capability (SWC) Tests for Protective Relays and Relay Systems

    • Historical Version
  4. IEEE C37.90.1-1974


    IEEE Standard Surge Withstand Capability Test For Protective Relays and Relay Systems

    • Historical Version