SN EN 61954 : 1999 AMD 1 2003

1 Scope
2 Normative references
3 Definitions
4 General requirements for type and optional tests
      4.1 Summary of tests
      4.2 Objectives of tests
             4.2.1 Dielectric tests
             4.2.2 Operational tests
             4.2.3 Electromagnetic interference tests
             4.2.4 Production tests
             4.2.5 Optional tests
      4.3 Guidelines for the performance of type and
             optional tests
      4.4 Test conditions
             4.4.1 General
             4.4.2 Valve temperature at testing
             4.4.3 Redundant thristor levels
      4.5 Permissible component failures during type
             testing
      4.6 Documentation of test results
             4.6.1 Test reports to be issued
             4.6.2 Contents of a type test report
5 Type tests on TCR and TSR valves
      5.1 Dielectric tests between valve terminals and
             earth
             5.1.1 AC test
             5.1.2 Lightning impulse test
      5.2 Dielectric tests between valves (MVU only)
             5.2.1 AC test
             5.2.2 Lightning impulse test
      5.3 Dielectric tests between valve terminals
             5.3.1 AC test
             5.3.2 Switching impulse test
      5.4 Operational tests
             5.4.1 Periodic firing and extinction test
             5.4.2 Minimum a.c. voltage test
             5.4.3 Temperature rise test
6 Type tests on TSC valves
      6.1 Dielectric tests between valve terminals and
             earth
             6.1.1 AC-DC test
             6.1.2 Lightning impulse test
      6.2 Dielectric tests between valves (for MVU only)
             6.2.1 AC-DC test
             6.2.2 Lightning impulse test
      6.3 Dielectric tests between valve terminals
             6.3.1 AC-DC test
             6.3.2 Switching impulse test
      6.4 Operational tests
             6.4.1 Overcurrent tests
             6.4.2 Minimum a.c. voltage test
             6.4.3 Temperature rise test
7 Electromagnetic interference tests
      7.1 Objectives
      7.2 Test procedures
             7.2.1 Switching impulse test
             7.2.2 Non-periodic firing test
8 Production tests
      8.1 Visual inspection
      8.2 Connection check
      8.3 Voltage-dividing/damping circuit check
      8.4 Voltage withstand check
      8.5 Check of auxiliaries
      8.6 Firing check
      8.7 Cooling system pressure test
9 Optional tests on TCR and TSR valves
      9.1 Overcurrent test
             9.1.1 Overcurrent with subsequent blocking
             9.1.2 Overcurrent without blocking
      9.2 Positive voltage transient during recovery test
             9.2.1 Objectives
             9.2.2 Test values and waveshapes
             9.2.3 Test procedures
      9.3 Non-periodic firing test
             9.3.1 Objectives
             9.3.2 Test values and waveshapes
             9.3.3 Test procedures
10 Optional tests on TSC valves
      10.1 Positive voltage transient during recovery test
             10.1.1 Test objective
             10.1.2 Test values and waveshapes
             10.1.3 Test procedures
      10.2 Non-periodic firing test
             10.2.1 Objectives
             10.2.2 Test values and waveshapes
             10.2.3 Test procedures
Figure 1 - TSC branch
Figure 2 - One-loop overcurrent
Figure 3 - Two-loop overcurrent
Table 1 - List of type tests and operational tests
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications