EN 61897:1998

FOREWORD
1 Scope
2 Normative references
3 Definitions
4 General requirements
  4.1 Design
  4.2 Materials
  4.3 Mass, dimensions and tolerances
  4.4 Protection against corrosion
  4.5 Manufacturing appearance and finish
  4.6 Marking
  4.7 Installation instructions
5 Quality assurance
6 Classification of tests
  6.1 Type tests
       6.1.1 General
       6.1.2 Application
  6.2 Sample tests
       6.2.1 General
       6.2.2 Application
       6.2.3 Sampling, acceptance criteria
  6.3 Routine tests
       6.3.1 General
       6.3.2 Application and acceptance criteria
  6.4 Table of tests to be applied
7 Test methods
  7.1 Visual examination
  7.2 Verification of dimensions, materials and mass
  7.3 Corrosion protection tests
       7.3.1 Hot dip galvanized components (other than
               messenger cable wires)
       7.3.2 Ferrous components protected from corrosion
               by methods other than hot dip galvanizing
       7.3.3 Hot dip galvanized messenger cable wires
  7.4 Non-destructive tests
  7.5 Clamp slip test
  7.6 Breakaway bolt test
  7.7 Clamp bolt tightening test
  7.8 Attachment of weights to messenger cable
  7.9 Attachment of clamp to messenger cable test
  7.10 Corona and radio interference voltage (RIV) tests
  7.11 Damper performance tests
       7.11.1 Performance test variants
       7.11.2 Damper characteristic test
       7.11.3 Damper effectiveness evaluation
               7.11.3.1 Methods of evaluation
               7.11.3.2 Laboratory test
               7.11.3.3 Field test
               7.11.3.4 Analytical method
  7.12 Damper fatigue test
       7.12.1 Test methods
       7.12.2 Swept frequency method
       7.12.3 Resonant frequency method
       7.12.4 Acceptance criteria
Annex A (normative) Minimum technical details to be agreed
                       between purchaser and supplier
Annex B (informative) Examples of graphs relevant to damper
                       characteristic test
Annex C (normative) Wind power input curve
Annex ZA (normative) Normative references to international
                       publications with their corresponding
                       European publications
Bibliography

Applies to Stockbridge type aeolian vibration dampers intended for single conductors or earth wires or conductor bundles where dampers are direclty attached to each subconductor.