BS CECC 42000:1978

Foreword
Preface
Section 1 - Scope
Section 2 - General
2.1 Related documents
2.2 Units, symbols and terminology
2.3 Standard and preferred values
2.4 Marking
Section 3 - Quality assessment procedures
3.1 Primary stage of manufacture
3.2 Structural similarity
3.3 Qualification approval procedures
3.4 Quality conformance inspection
3.5 Certified test records
3.6 Delayed delivery
3.7 Alternative test methods
3.8 Release for delivery before the completion of
      Group B tests
Section 4 - Test and measurement procedures
4.1 Standard conditions for testing
4.2 Visual examination and check of dimensions
4.3 Voltage (or current) at reference current (or
      voltage)
4.4 Non-linearity
4.5 Temperature coefficient
4.6 Capacitance
4.7 Voltage proof (for insulated varistors only)
4.8 Insulation resistance (for insulated varistors
      only)
4.9 Robustness of the varistor body (for rod types
      only)
4.10 Soldering
4.11 Robustness of terminations
4.12 Rapid change of temperature
4.13 Bump
4.14 Shock
4.15 Vibration
4.16 Climatic sequence
4.17 Damp heat, steady state
4.18 Flammability
4.19 Electrical endurance, at room temperature
4.20 Electrical endurance, at upper category
      temperature
Section 5 - Sectional and blank detail specifications
Appendix A
Appendix B
Appendix C

A range of varistors with symmetrical voltage current characteristics, classified according to application and manufacturing technology.