NBN EN 62271-2 : 2003

FOREWORD
1 Scope and object
2 Normative references
3 Definitions
4 Seismic qualification requirements
  4.1 Preliminary analysis
5 Severities
6 Qualification by test
  6.1 Introduction
  6.2 Mounting
  6.3 External load
  6.4 Measurements
  6.5 Frequency range
  6.6 Test severity
  6.7 Testing
7 Qualification by combined test and analysis
  7.1 Introduction
  7.2 Vibrational and functional data
  7.3 Analysis
8 Evaluation of the seismic qualification
  8.1 Combination of stresses
  8.2 Acceptance criteria of the seismic test
  8.3 Functional evaluation of the test results
  8.4 Allowable stresses
9 Documentation
  9.1 Information for seismic qualification
  9.2 Test report
  9.3 Analysis report
Annex A (normative) - Characterization of the test-set
Annex B (informative) - Criteria for seismic adequacy
         of gas-insulated metal-enclosed switchgear
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Applies to all switchgear and their assemblies for alternating current of rated voltages of 72,5 kV and above for indoor and outdoor installation, including their supporting structure rigidly connected to the ground. Where switchgear and their assemblies are not ground mounted, e.g. in a building, conditions for application are subject to agreement between users and manufacturers.