EN 60255-21-3:1995

FOREWORD
1 Scope and object
2 Normative references
3 Definitions
  3.1 Single axis sine sweep seismic test
  3.2 Biaxial test
  3.3 Biaxial multi-frequency random seismic test
  3.4 Standard response spectrum
  3.5 Damping
  3.6 Zero period acceleration
  3.7 Random motion sample
  3.8 Time-history
  3.9 Strong part of the time-history
4 Requirements for single axis sine sweep seismic
  test (method A)
  4.1 Main parameters
  4.2 Test apparatus and mounting
  4.3 Test severity classes
5 Requirements for biaxial multi-frequency random
  seismic test (method B)
  5.1 Main parameters
  5.2 Test apparatus and mounting
  5.3 Test severity classes
  5.4 Biaxial conditioning
6 Selection of test severity classes
  6.1 Recommendations for selection of test classes
  6.2 identification of test method and severity class
7 Test procedures
8 Criteria for acceptance
Annex A (informative) Seismic tests choice criteria
ANNEX ZA (normative) OTHER INTERNATIONAL PUBLICATIONS QUOTED
                       IN THIS STANDARD WITH THE REFERENCES OF
                       THE RELEVANT EUROPEAN PUBLICATIONS

Specifies the vibration, shock, bump and seismic tests applicable to electromechanical and static measuring relays and protection equipment, with or without output contacts.