IEEE DRAFT C37.90.1 : D6 2000

1 Overview
      1.1 Scope
      1.2 Purpose
2 Definitions
3 Test wave shapes
      3.1 Oscillatory Waveform
      3.2 Fast transient test waveform
4 Test generator characteristics
      4.1 Oscillatory SWC test
      4.2 Fast transient SWC test
      4.3 Common characteristics for all SWC test
             generators
      4.4 Verification of test generator characteristics
5 Equipment to be tested
      5.1 Test intent
      5.2 System
      5.3 Application
      5.4 Protective relay communications equipment
      5.5 Test Points
6 Application of test wave
      6.1 External connection groups
      6.2 Point of application of tests
      6.3 Conditions of test
7 Test procedures
      7.1 Test types
      7.2 Common mode tests
      7.3 Transverse mode tests
8 Criteria for acceptance
      8.1 Application of criteria
      8.2 Conditions to be met
      8.3 Equipment functioning
      8.4 Exceptions
9 Test records
Annex A (normative) Verification of test generator
                    characteristics
      A.1 - Measuring system requirements
      A.2 - SWC waveform validity tests
      A.3 - SWC test generator performance verification
      A.4 - Alternative voltage measuring scheme
Annex B (informative) Test waveform delivery
      B.1 - Waveform delivery principles
      B.2 - Verification of the waveform delivery system
            characteristics
Annex C (informative) Balanced/unbalanced transformer
                      impedance matching network examples
      C.1 - Introduction
      C.2 - Balanced/Unbalanced transmission line transformer
      C.3 - Transmission line based impedance matching
            transformer
Annex D (informative) Communication interface equipment and
                      communication system equipment
Annex E (informative) Comparison with IEC standard 60255-22-1
                      1988 and 60255-22-4 1992
      E.1 - Severity classes
      E.2 - Application of test
      E.3 - Current input circuits
      E.4 - Maximum test lead length
      E.5 - Coupling network
      E.6 - Acceptance criteria

Describes design tests for relays and relay systems relative to the immunity of this equipment to repetitive electrical transients. Two types of tests are specified.