BS EN IEC 61897:2020
$167.15
Overhead lines. Requirements and tests for Aeolian vibration dampers
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 34 |
IEC 61897:2020 is available as IEC 61897:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61897:2020 applies to aeolian vibration dampers intended for single conductors or earth wires or conductor bundles where dampers are directly attached to each subconductor. The purchaser may adopt part(s) of this document when specifying requirements for cables different from those mentioned above (e.g. optical ground wires (OPGW), all dielectric self-supporting optical cables (ADSS)). In some cases, test procedures and test values are left to agreement between the purchaser and the supplier and are stated in the procurement contract. Annex A lists the minimum technical details to be agreed between purchaser and supplier. Throughout this document, the word “conductor” is used when the test applies to dampers for conductors or earth wires. This second edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Consider, in addition to Stockbridge type aeolian vibration dampers, also spiral aeolian vibration dampers and elastomeric aeolian vibration dampers. b) Consider the application of dampers on high temperature conductors, specifying additional high temperature tests in clamp slip tests. c) Simplify the procedure of the damper effectiveness evaluation. d) Introduce test at low temperature on fastener components such as break away bolts and conical spring washers. e) Include figures showing the test arrangements for the main mechanical tests. Key words: Overhead Lines, Aeolian Vibration Dampers
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 7 | English CONTENTS |
| 9 | FOREWORD |
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms and definitions 4 General requirements 4.1 Design |
| 13 | 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 |
| 14 | 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 |
| 15 | 6.3 Routine tests 6.3.1 General 6.3.2 Application and acceptance criteria 6.4 Table of tests to be applied |
| 16 | 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) |
| 17 | 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 |
| 18 | 7.6 Breakaway bolt test Figures Figure 1 – Test arrangement for longitudinal slip tests |
| 19 | 7.7 Clamp bolt tightening test 7.8 Attachment of weights to messenger cable test |
| 20 | 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 Figure 2 – Test arrangement for attachment of weights to messenger cable test Figure 3 – Test arrangement for attachment of clamp to messenger cable test |
| 21 | 7.11.2 Damper characteristic test |
| 23 | 7.11.3 Damper effectiveness evaluation Figure 4 – Test arrangement for damper characteristic test Figure 5 – Example of test rig for laboratory test of damper effectiveness |
| 26 | 7.12 Damper fatigue test 7.12.1 Test methods 7.12.2 Swept frequency method 7.12.3 Resonant frequency method |
| 27 | 7.12.4 Acceptance criteria 7.12.5 Fatigue test method – for spiral aeolian vibration dampers (SVD) |
| 28 | Annex A (normative) Minimum technical details to be agreed between purchaser and supplier |
| 29 | Annex B (informative) Examples of graphs relevant to damper characteristic test Figure B.1 – Examples of graphs relevant to damper characteristic test (damper with two resonant frequencies) |
| 30 | Annex C (normative) Wind power input curve Figure C.1 – Wind power input curve |
| 32 | Annex D (informative) Description of HT conductors as given in CIGRE TB 695‑2017 [6] |
| 33 | Bibliography |
