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IEC 61897
Edition 2.0 2020-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Overhead lines – Requirements and tests for stockbridge type aeolian vibration
dampers
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IEC 61897
Edition 2.0 2020-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Overhead lines – Requirements and tests for stockbridge type aeolian vibration
dampers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.20 ISBN 978-2-8322-7964-9
– 2 – IEC 61897:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General requirements . 8
4.1 Design . 8
4.2 Materials . 8
4.3 Mass, dimensions and tolerances . 8
4.4 Protection against corrosion . 8
4.5 Manufacturing appearance and finish . 8
4.6 Marking . 9
4.7 Installation instructions . 9
5 Quality assurance . 9
6 Classification of tests. 9
6.1 Type tests . 9
6.1.1 General . 9
6.1.2 Application . 9
6.2 Sample tests . 9
6.2.1 General . 9
6.2.2 Application . 9
6.2.3 Sampling, acceptance criteria . 10
6.3 Routine tests. 10
6.3.1 General . 10
6.3.2 Application and acceptance criteria . 10
6.4 Table of tests to be applied . 10
7 Test methods . 11
7.1 Visual examination . 11
7.2 Verification of dimensions, materials and mass . 11
7.3 Corrosion protection tests . 12
7.3.1 Hot dip galvanized components (other than messenger cable wires) . 12
7.3.2 Ferrous components protected from corrosion by methods other than
hot dip galvanizing . 12
7.3.3 Hot dip galvanized messenger cable wires . 12
7.4 Non-destructive tests . 12
7.5 Clamp slip test . 13
7.6 Breakaway bolt test . 14
7.7 Clamp bolt tightening test . 15
7.8 Attachment of weights to messenger cable test . 15
7.9 Attachment of clamp to messenger cable test . 16
7.10 Corona and radio interference voltage (RIV) tests . 16
7.11 Damper performance tests . 16
7.11.1 Performance test variants . 16
7.11.2 Damper characteristic test . 17
7.11.3 Damper effectiveness evaluation . 19
7.12 Damper fatigue test . 22
7.12.1 Test methods . 22
7.12.2 Swept frequency method . 23
7.12.3 Resonant frequency method . 23
7.12.4 Acceptance criteria . 23
7.12.5 Fatigue test method – for spiral aeolian vibration dampers (SVD) . 24
Annex A (normative) Minimum technical details to be agreed between purchaser and
supplier . 25
Annex B (informative) Examples of graphs relevant to damper characteristic test . 26
Annex C (normative) Wind power input curve . 27
Annex D (informative) Description of HT conductors as given in
CIGRE TB 695‑2017 [6] . 29
Bibliography . 30
Figure 1 – Test rig for laboratory test of damper effectiveness (see 7.11.3.2) . .
Figure 1 – Test arrangement for longitudinal slip tests . 14
Figure 2 – Test arrangement for attachment of weights to messenger cable test . 16
Figure 3 – Test arrangement for attachment of clamp to messenger cable test . 16
Figure 4 – Test arrangement for damper characteristic test . 19
Figure 5 – Example of test rig for laboratory test of damper effectiveness . 19
Figure B.1 – Examples of graphs relevant to damper characteristic test (damper with
two resonant frequencies) . 26
Figure C.1 – Wind power input curve . 27
Table 1 – Tests on dampers . 11
Table 2 – Load criteria (for standard and high temperature conductors) . 14
Table 2 3 – Acceptance criteria . 18
– 4 – IEC 61897:2020 RLV © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
OVERHEAD LINES –
REQUIREMENTS AND TESTS FOR AEOLIAN VIBRATION DAMPERS
FOREWORD
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