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Scope

The insulation characteristics of protective relays and their associated auxiliaries have been the concern of relay engineers since the early 1920a??s. Until about 1954, relays utilized principally electromechanical construction. Some investigations were made during this period on the effects of surges on these relays. This has been reported in the literature. The development of the transistor resulted in semiconductor components being used in both relay and communication equipment. Field experience indicated that these components are sensitive to certain electrical surges. Since about 1960, considerable amount of investigation has been done relating to the nature of these surges and methods for their control in relation to static relaying. The results of some of these studies are given in Refs [4] through [17]. These investigations and others were used as a basis by the IEEE Relay Committeea??s Working Group on Static Relay Surge Protection to develop the surge withstand capability (SWC) test for relays.

Abstract

New IEEE Standard - Superseded. 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.
 

Document History

  1. IEEE C37.90.1-2012


    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

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

    • Historical Version