SIST EN IEC 61897:2020

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Nadzemni vodi - Zahteve in preskusi za dušilnike vetrnih vibracijOverhead lines - Requirements and tests for Aeolian vibration dampers29.240.20DaljnovodiPower transmission and distribution linesICS:Ta slovenski standard je istoveten z:prEN IEC 61897:2019oSIST prEN IEC 61897:2019en,fr,de01-april-2019oSIST prEN IEC 61897:2019SLOVENSKI

IEC TC 11 : OVERHEAD LINES SECRETARIAT: SECRETARY: South Africa Mr John Dlamini OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD: TC 7,TC 122

Other TC/SCs are requested to indicate their interest, if any, in this CDV to the secretary. FUNCTIONS CONCERNED:

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The CENELEC members are invited to vote through the CENELEC online voting system.

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2 FOREWORD .......................................................................................................................... 5 3 1 Scope ............................................................................................................................. 6 4 2 Normative references ...................................................................................................... 6 5 3 Definitions....................................................................................................................... 7 6 3.1 stockbridge-type aeolian vibration damper ............................................................. 7 7 3.2 spiral aeolian vibration damper (SVD) .................................................................... 7 8 3.3 elastomeric aeolian vibration damper ..................................................................... 7 9 4 General requirements ..................................................................................................... 7 10 4.1 Design.................................................................................................................... 7 11 4.2 Materials ................................................................................................................ 8 12 4.3 Mass, dimensions and tolerances ........................................................................... 8 13 4.4 Protection against corrosion ................................................................................... 8 14 4.5 Manufacturing appearance and finish ..................................................................... 8 15 4.6 Marking .................................................................................................................. 8 16 4.7 Installation instructions ........................................................................................... 8 17 5 Quality assurance ........................................................................................................... 8 18 6 Classification of tests ...................................................................................................... 9 19 6.1 Type tests .............................................................................................................. 9 20 6.1.1 General ........................................................................................................... 9 21 6.1.2 Application ...................................................................................................... 9 22 6.2 Sample tests .......................................................................................................... 9 23 6.2.1 General ........................................................................................................... 9 24 6.2.2 Application ...................................................................................................... 9 25 6.2.3 Sampling, acceptance criteria ......................................................................... 9 26 6.3 Routine tests .......................................................................................................... 9 27 6.3.1 General ........................................................................................................... 9 28 6.3.2 Application and acceptance criteria ................................................................. 9 29 6.4 Table of tests to be applied .................................................................................. 10 30 7 Test methods ................................................................................................................ 10 31 7.1 Visual examination ............................................................................................... 10 32 7.2 Verification of dimensions, materials and mass .................................................... 11 33 7.3 Corrosion protection tests .................................................................................... 11 34 7.3.1 Hot dip galvanized components (other than messenger cable wires) ............. 11 35 7.3.2 Ferrous components protected from corrosion by methods other than hot dip 36 galvanizing.................................................................................................... 11 37 7.3.3 Hot dip galvanized messenger cable wires .................................................... 11 38 7.4 Non-destructive tests ........................................................................................... 11 39 7.5 Clamp slip test ..................................................................................................... 12 40 7.6 Breakaway bolt test .............................................................................................. 13 41 7.7 Clamp bolt tightening test ..................................................................................... 14 42 7.8 Attachment of weights to messenger cable test .................................................... 14 43 7.9 Attachment of clamp to messenger cable test ....................................................... 15 44 oSIST prEN IEC 61897:2019

11/260/CDV 7.10 Corona and radio interference voltage (RIV) tests ................................................ 15 45 7.11 Damper performance tests ................................................................................... 16 46 7.11.1 Performance test variants ............................................................................. 16 47 7.11.2 Damper characteristic test ............................................................................ 16 48 7.11.2.1 Stockbridge or elastomeric dampers only ................................... 16 49 7.11.2.2 High Temperature Conductors (HTC) – Elastomeric Dampers Only50

.................................................................................................. 17 51 7.11.3 Damper effectiveness evaluation .................................................................. 18 52 7.11.3.1 Methods of evaluation ................................................................ 18 53 7.11.3.2 Laboratory test ........................................................................... 18 54 7.11.3.3 Field test .................................................................................... 20 55 7.11.3.4 Analytical method ....................................................................... 20 56 7.12 Damper fatigue test .............................................................................................. 21 57 7.12.1 Test methods ................................................................................................ 21 58 7.12.2 Swept frequency method ............................................................................... 21 59 7.12.3 Resonant frequency method.......................................................................... 21 60 7.12.4 Acceptance criteria ....................................................................................... 21 61 7.12.5 Fatigue test method – for spiral aeolian vibration dampers (SVD) ................. 22 62

Examples of graphs relevant to damper characteristic test............ 23 66 Annex C (normative)

Wind power input curve ................................................................ 24 67 Annex D (informative)

HT conductors as given in CIGRE TB 695-2017……26 68 Bibliography ...................................................................................................................... 27 69 oSIST prEN IEC 61897:2019

11/260/CDV INTERNATIONAL ELECTROTECHNICAL COMMISSION 1 ––––––––––– 2 OVERHEAD LINES – 3 Requirements and tests for aeolian vibration dampers 4

5 FOREWORD 6 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising 7 all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote 8 international co-operation on all questions concerning standardization in the electrical and electronic fields. To 9 this end and in addition to other activities, the IEC publishes International Standards. Their preparation is 10 entrusted to technical committees; any IEC National Committee interested in the subject dealt with may 11 participate in this preparatory work. International, governmental and non-governmental organizations liaising 12 with the IEC also participate in this preparation. The IEC collaborates closely with the International 13 Organization for Standardization (ISO) in accordance with conditions determined by agreement between the 14 two organizations. 15 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an 16 international consensus of opinion on the relevant subjects since each technical committee has representation 17 from all interested National Committees. 18 3) The documents produced have the form of recommendations for international use and are published in the form 19 of standards, technical reports or guides and they are accepted by the National Committees in that sense. 20 4) In order to promote international unification, IEC National Committees undertake to apply IEC International 21 Standards transparently to the maximum extent possible in their national and regional standards. Any 22 divergence between the IEC Standard and the corresponding national or regional standard shall be clearly 23 indicated in the latter. 24 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any 25 equipment declared to be in conformity with one of its standards. 26 6)

Attention is drawn to the possibility that some of the elements of this International Standard may be the subject 27 of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. 28 International Standard IEC 61897 has been prepared by Maintenance Team MT1: 29 Maintenance of TC 11 documents, of IEC Technical Committee 11: Overhead lines. 30

31 This second edition cancels and replaces the first edition published in 1998. This edition 32 constitutes a technical revision. 33

34 This edition includes the following significant technical changes with respect to the 35 previous edition: 36

37 a) Consider, in addition to Stockbridge type aeolian vibration dampers, also Spiral 38 aeolian vibration dampers and Elastomeric aeolian vibration dampers 39

40 b) Consider the application of dampers on high temperature conductors, specifying 41 additional high temperature tests in clamp slip tests 42

Introduce test at low temperature on fastener components such as break away bolts

50 f) Include figures showing the test arrangements for the main mechanical tests 51

52 Annexes A and C form an integral part of this standard. 53 Annex B and D are for information only. 54 oSIST prEN IEC 61897:2019

55 The text of this standard is based on the following documents: 56 FDIS Report on voting 11/140/FDIS 11/142/RVD

57 Full information on the voting for the approval of this standard can be found in the report on 58 voting indicated in the above table. 59 This document has been drafted in accordance with the ISO/IEC Directives, Part 2. 60

61 The committee has decided that the contents of this document will remain unchanged until 62 the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data 63 related to the specific document. At this date, the document will be 64

65 reconfirmed, 66 withdrawn, 67 replaced by a revised edition, or 68 amended 69 70 oSIST prEN IEC 61897:2019

11/260/CDV OVERHEAD LINES – 71 REQUIREMENTS AND TESTS FOR AEOLIAN VIBRATION DAMPERS 72

73 1 Scope 74 This International Standard applies to aeolian vibration dampers intended for single 75 conductors or earth wires or conductor bundles where dampers are directly attached to each 76 subconductor. 77 The purchaser may adopt part(s) of this standard when specifying requirements for cables 78 different from those mentioned above (e.g. optical ground wires (OPGW), all dielectric self-79 supporting optical cables (ADSS)). 80 In some cases, test procedures and test values are left to agreement between the purchaser 81 and the supplier and are stated in the procurement contract. 82 Annex A lists the minimum technical details to be agreed between purchaser and supplier. 83 Throughout this standard, the word “conductor” is used when the test applies to dampers for 84 conductors or earth wires. 85 2 Normative references 86 The following normative documents contain provisions which, through reference in this text, 87 constitute provisions of this International Standard.

All normative documents are subject to revision, and parties to 89 agreements are encouraged to investigate the possibility of applying the most recent editions 90 of the normative documents indicated below.

Members of IEC and ISO maintain registers of 91 currently valid International Standards. 92

93 IEC 60050(466):1990, International Electrotechnical Vocabulary (IEV) – Chapter 466: 94 Overhead lines 95 IEC 61284:1997, Overhead lines – Requirements and tests for fittings 96 IEC 60888:1987, Zinc-coated steel wires for stranded conductors 97 IEC 62567: 2013, Methods for testing self-damping characteristics of stranded conductors for 98 overhead lines 99 ISO 1461: 2009, — Hot dip galvanized coatings on fabricated iron and steel articles - 100 Specifications and test methods

101 ISO 2859-1:1999, Sampling procedures for inspection by attributes – Part 1: Sampling 102 schemes indexed by acceptable quality limit (AQL) for lot-by-lot inspection + Ammendment 1 103 (2011) 104

11/260/CDV ISO 2859-2:1985, Sampling procedures for inspection by attributes – Part 2: Sampling plans 107 indexed by limiting quality level (LQ) for isolated lot inspection 108 ISO 3951-1:2013, Sampling procedures for inspection by variables -- Part 1: Specification for 109 single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a 110 single quality characteristic and a single AQL 111 ISO 3951-2:2013, Sampling procedures for inspection by variables -- Part 2: General 112 specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot 113 inspection of independent quality characteristics 114 ISO

9001:2015, Quality management systems – Requirements 116 ISO 9004:2018, Managing for the sustained success of an organization – A quality 117 management approach 118 ISO 10684:2008, Fasteners – Hot dip galvanized coatings 119 3 Definitions 120 For the purpose of this International Standard, the definitions of the International 121 Electrotechnical Vocabulary (IEV) apply, in particular IEC 60050(466). Those which differ or 122 do not appear in the IEV are given below. 123 3.1 stockbridge-type aeolian vibration damper 124 Device comprising a steel cable with a weight at each end and one bolted clamp or a helical rod 125 attachment, attachable to a conductor, for the purpose of damping aeolian vibration 126 3.2 spiral aeolian vibration damper (SVD) 127 Device made of helical plastic which wraps around the conductor for purposes of damping aeolian 128 vibration (these are commonly used on earth wires, OPGW and ADSS cables). 129 3.3 elastomeric aeolian vibration damper 130 Device comprising suspended weights connected to elastomeric articulations and one bolted clamp or 131 a helical rod attachment, attachable to a conductor for the purpose of damping aeolian vibration. 132 1.1 3.4 high temperature conductors (HTC) 133 1.2 conductors which are designed to have a maximum continuous operating temperature 134 over 95°C. 135 3.5 maximum continuous operating temperature 136 conductor temperature specified by the manufacturer and measured at the outer wire layers 137 4 General requirements 138 4.1 Design 139 The damper shall be designed so as to 140 – damp aeolian vibration; 141 – withstand mechanical loads imposed during installation, maintenance and specified 142 service conditions; 143 – avoid damage to the conductor under specified service conditions; 144 – be capable of being removed and re-installed without damage to the conductor; 145 – be free from unacceptable levels of corona and radio interference under all service 146 conditions, when installed on phase conductors; 147 – be suitable for safe and easy installation. The clamp design shall retain all parts when 148 opened for attachment to conductor. Furthermore, the clamp design shall be such that the 149 oSIST prEN IEC 61897:2019

11/260/CDV damper, during installation, can be suspended on the conductor before tightening the 150 clamp; 151 – ensure that individual components will not become loose in service; 152 – maintain its function over the entire service temperature range; 153 – avoid audible noise; 154 – prevent water collection. 155 NOTE – Other desirable characteristics which are not essential to the basic functions of the damper but which may 156 be advantageous include: 157 – verification of proper installation from the ground; 158 – easy installation and removal from energized lines. 159 In the case of vibration dampers for conductors or earth wires containing integral fibre optic elements (or an 160 externally applied optical cable wrapped around the earth wire) the possible effects of the damper on these fibre 161 optic elements should be accounted for. 162 4.2 Materials 163 The materials shall conform to the requirements of IEC 61284. 164 4.3 Mass, dimensions and tolerances 165 Damper mass and significant dimensions, including appropriate tolerances, shall be shown on 166 contract drawings. 167 4.4 Protection against corrosion 168 In addition to the applicable requirements of IEC 61284, the messenger cable (including cut 169 ends when exposed) shall be protected against corrosion, e.g. in accordance with IEC 60888 170 for hot dip galvanized steel wire. 171 4.5 Manufacturing appearance and finish 172 The dampers shall be free of defects and irregularities; they shall have all outside surfaces 173 smooth and all edges and corners well-rounded. 174 4.6 Marking 175 The fitting marking requirements of IEC 61284 shall be applied to all clamp assemblies 176 including those using breakaway bolts. On spiral dampers, the markings should be on the 177 plastic rod.

178 4.7 Installation instructions 179 The supplier shall provide a clear and complete description of the recommended installation 180 procedure including in-span positions. 181 5 Quality assurance 182 A quality assurance programme taking into account the requirements of this standard can be 183 used by agreement between the purchaser and the supplier to verify the quality of the 184 vibration dampers during the manufacturing process. 185 Detailed information on the use of quality assurance is given in a system as per ISO 9001 or 186 similar.

187 It is recommended that test equipment used to verify compliance to this standard is routinely 188 maintained and calibrated in accordance with a relevant quality standard. 189 oSIST prEN IEC 61897:2019

11/260/CDV 6 Classification of tests 190 6.1 Type tests 191 6.1.1 General 192 Type tests are intended to establish design characteristics. They are normally made once and 193 repeated only when the design or the material of the damper components is changed. The 194 results of type tests are recorded as evidence of compliance with design requirements. 195 6.1.2 Application 196 Dampers shall be subjected to type tests as per Table 1. 197 Unless otherwise specified, each type test shall be performed on three test samples which are 198 identical in all essential respects with dampers to be supplied under contract to the purchaser. 199 All units shall pass the tests. 200 The dampers used for tests during which no damage occurs to the units or their components 201 may be used in subsequent tests. 202 6.2 Sample tests 203 6.2.1 General 204 Sample tests are required to verify that the dampers meet the performance specifications of 205 the type test samples. In addition, they are intended to verify the quality of material and 206 workmanship. 207 6.2.2 Application 208 Dampers shall be subjected to sample tests as per Table 1. 209 The samples to be tested shall be selected at random from the lot offered for acceptance. The 210 purchaser has the right to make the selection. 211 The dampers used for tests during which no damage occurs to the units or their components 212 may be used in subsequent tests. 213 6.2.3 Sampling, acceptance criteria 214 The sampling plan procedures according to ISO 2859-1 and ISO 2859-2 (inspection by 215 attributes) and ISO 3951 (inspection by variables) and the detailed procedures (inspection 216 level, AQL, single, double or multiple sampling, etc.) shall be agreed between the purchaser 217 and the supplier for each different attribute or variable. 218 NOTE – Sampling inspection by variables is an acceptance sampling procedure to be used in place of inspection 219 by attributes when it is appropriate to measure on some continuous scale the characteristic(s) under consideration. 220 In the case of failure load tests and similar expensive tests, better distinction between acceptable quality and 221 objective quality is available with acceptance sampling by variables than by attributes for the same sample size. 222 The purpose of the sampling process may also be important in the choice between a variables or attributes plan. 223 For example, a purchaser may choose to use an attributes acceptance sampling plan to assure that parts in a 224 shipment lot are within a required dimensional tolerance; the manufacturer may make measurements under a 225 variables sampling plan of the same dimensions because he is concerned with gradual trends or changes which 226 may affect his ability to provide shipment lots which meet the AQL. 227 6.3 Routine tests 228 6.3.1 General 229 Routine tests are intended to prove conformance of vibration dampers to specific 230 requirements and are made on every damper. The tests shall not damage the dampers. 231 6.3.2 Application and acceptance criteria 232 Whole lots of dampers may be subjected to routine tests. Any damper which does not conform 233 to the requirements shall be discarded. 234 oSIST prEN IEC 61897:2019

11/260/CDV 6.4 Table of tests to be applied 235 The following Table 1 indicates the tests which shall be performed. These are marked with an 236 "X" in the table. 237 However, the purchaser may specify additional tests which are included in the table and 238 marked with an "O". 239 Units or components damaged during the test shall be excluded from the delivery to the 240 customer. 241 Table 1 – Tests on dampers 242 Subclause Test Type test Sample test Routine test 7.1 Visual examination X X O 7.2 Verification of dimensions, materials and mass X X

1) Not applicable for earth wire dampers. NOTES: • The supplier should state in the tender quality plan, or other tender documentation, which testing is already complete (i.e. which type tests) and which tests (sample or routine) are included in the tender, subject to the approval or change required by the purchaser. • If conical washers are used on bolted clamps, embrittlement tests shall be performed in accordance with clause 7.5.2.2 of IEC 61854, Second edition.

243 7 Test methods 244 7.1 Visual examination 245 Type tests shall include visual examination to ascertain conformity of the dampers in all 246 essential respects, with the manufacturing or contract drawings. Deviations from the drawings 247 shall be subject to the approval of the purchaser and shall be appropriately documented as an 248 agreed concession. 249 Sample tests and, if required, routine tests shall include visual examination to ensure 250 conformity of manufacturing process, shape, coating and surface finish of the damper with the 251 contract drawings. Particular attention shall be given to markings required and to the finish of 252 surfaces which come into contact with the conductor. The sample test procedure and 253 acceptance criteria shall be agreed between the purchaser and the supplier. 254 For dampers subjected to corona type test, the sample test shall include a comparison of 255 shape and surface finish with one of the corona type test samples when specified by the 256 purchaser. 257 oSIST prEN IEC 61897:2019

11/260/CDV 7.2 Verification of dimensions, materials and mass 258 Type and sample tests shall include verification of dimensions to ensure that dampers are 259 within the dimensional tolerances stated on contract drawings. The purchaser may choose to 260 witness the measurement of selected dimensions or may inspect the supplier's documentation 261 when this is available. 262 Type and sample tests shall also include verification of materials to ensure that they are in 263 accordance with contract drawings and documents. This verification shall normally be carried 264 out by the purchaser inspecting the supplier's documentation relating to material 265 specifications, certificates of conformity or other quality documentation. 266 The total mass of the damper complete with all its components shall comply with the mass 267 shown on the contract drawing (within given tolerances). 268 7.3 Corrosion protection tests 269 7.3.1 Hot dip galvanized components (other than messenger cable wires) 270 Hot dip galvanized components other than messenger cable wires shall be tested in 271 accordance with the requirements specified in ISO 1461. 272 The coating thicknesses shall conform to tables 3 and 4 unless otherwise agreed between 273 purchaser and supplier. However, for the purpose of this standard, tables 3 and 4 in ISO 1461 274 shall apply to the following categories of items (and not to the categories specified in 275 ISO 1461). 276 Table 3 Coating thickness on all samples except 277

– small parts which are centrifuged (significant surface area <1 000 mm2). 285 7.3.2 Ferrous components protected from corrosion by methods other than hot dip 286 galvanizing 287 Ferrous components protected from corrosion by methods other than hot dip galvanizing shall 288 be tested in accordance with the requirements of relevant IEC/ISO standards agreed between 289 purchaser and supplier. 290 7.3.3 Hot dip galvani