SIST EN IEC 61897:2021

SLOVENSKI STANDARD
oSIST prEN IEC 61897:2019
01-april-2019
Nadzemni vodi - Zahteve in preskusi za dušilnike vetrnih vibracij
Overhead lines - Requirements and tests for Aeolian vibration dampers
Ta slovenski standard je istoveten z: prEN IEC 61897:2019
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
oSIST prEN IEC 61897:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 61897:2019

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oSIST prEN IEC 61897:2019
11/260/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61897 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-02-01 2019-04-26
SUPERSEDES DOCUMENTS:
11/253/CD,11/257A/CC

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:

EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.

TITLE:
Overhead lines - Requirements and tests for Aeolian vibration dampers

PROPOSED STABILITY DATE: 2025

NOTE FROM TC/SC OFFICERS:

Copyright © 2018 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

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oSIST prEN IEC 61897:2019
IEC CDV 61897/Ed2 © IEC 2019 – 2 –   11/260/CDV
1 CONTENTS
2
3 FOREWORD . 5
4 1 Scope . 6
5 2 Normative references . 6
6 3 Definitions. 7
7 3.1 stockbridge-type aeolian vibration damper . 7
8 3.2 spiral aeolian vibration damper (SVD) . 7
9 3.3 elastomeric aeolian vibration damper . 7
10 4 General requirements . 7
11 4.1 Design. 7
12 4.2 Materials . 8
13 4.3 Mass, dimensions and tolerances . 8
14 4.4 Protection against corrosion . 8
15 4.5 Manufacturing appearance and finish . 8
16 4.6 Marking . 8
17 4.7 Installation instructions . 8
18 5 Quality assurance . 8
19 6 Classification of tests . 9
20 6.1 Type tests . 9
21 6.1.1 General . 9
22 6.1.2 Application . 9
23 6.2 Sample tests . 9
24 6.2.1 General . 9
25 6.2.2 Application . 9
26 6.2.3 Sampling, acceptance criteria . 9
27 6.3 Routine tests . 9
28 6.3.1 General . 9
29 6.3.2 Application and acceptance criteria . 9
30 6.4 Table of tests to be applied . 10
31 7 Test methods . 10
32 7.1 Visual examination . 10
33 7.2 Verification of dimensions, materials and mass . 11
34 7.3 Corrosion protection tests . 11
35 7.3.1 Hot dip galvanized components (other than messenger cable wires) . 11
36 7.3.2 Ferrous components protected from corrosion by methods other than hot dip
37 galvanizing. 11
38 7.3.3 Hot dip galvanized messenger cable wires . 11
39 7.4 Non-destructive tests . 11
40 7.5 Clamp slip test . 12
41 7.6 Breakaway bolt test . 13
42 7.7 Clamp bolt tightening test . 14
43 7.8 Attachment of weights to messenger cable test . 14
44 7.9 Attachment of clamp to messenger cable test . 15

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45 7.10 Corona and radio interference voltage (RIV) tests . 15
46 7.11 Damper performance tests . 16
47 7.11.1 Performance test variants . 16
48 7.11.2 Damper characteristic test . 16
49 7.11.2.1 Stockbridge or elastomeric dampers only . 16
50 7.11.2.2 High Temperature Conductors (HTC) – Elastomeric Dampers Only
51 . 17
52 7.11.3 Damper effectiveness evaluation . 18
53 7.11.3.1 Methods of evaluation . 18
54 7.11.3.2 Laboratory test . 18
55 7.11.3.3 Field test . 20
56 7.11.3.4 Analytical method . 20
57 7.12 Damper fatigue test . 21
58 7.12.1 Test methods . 21
59 7.12.2 Swept frequency method . 21
60 7.12.3 Resonant frequency method. 21
61 7.12.4 Acceptance criteria . 21
62 7.12.5 Fatigue test method – for spiral aeolian vibration dampers (SVD) . 22
63
64 Annex A (normative)  Minimum technical details to be agreed between purchaser
65 and supplier 22
66 Annex B (informative)  Examples of graphs relevant to damper characteristic test. 23
67 Annex C (normative)   Wind power input curve . 24
68 Annex D (informative)  Description of HT conductors as given in CIGRE TB 695-2017……26
69 Bibliography . 27

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oSIST prEN IEC 61897:2019
IEC CDV 61897/Ed2 © IEC 2019 – 4 –   11/260/CDV
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 –––––––––––
3 OVERHEAD LINES –
4 Requirements and tests for aeolian vibration dampers
5
6 FOREWORD
7 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
8 all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
9 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
10 this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
11 entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
12 participate in this preparatory work. International, governmental and non-governmental organizations liaising
13 with the IEC also participate in this preparation. The IEC collaborates closely with the International
14 Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
15 two organizations.
16 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
17 international consensus of opinion on the relevant subjects since each technical committee has representation
18 from all interested National Committees.
19 3) The documents produced have the form of recommendations for international use and are published in the form
20 of standards, technical reports or guides and they are accepted by the National Committees in that sense.
21 4) In order to promote international unification, IEC National Committees undertake to apply IEC International
22 Standards transparently to the maximum extent possible in their national and regional standards. Any
23 divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
24 indicated in the latter.
25 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
26 equipment declared to be in conformity with one of its standards.
27 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
28 of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
29 International Standard IEC 61897 has been prepared by Maintenance Team MT1:
30 Maintenance of TC 11 documents, of IEC Technical Committee 11: Overhead lines.
31
32 This second edition cancels and replaces the first edition published in 1998. This edition
33 constitutes a technical revision.
34
35 This edition includes the following significant technical changes with respect to the
36 previous edition:
37
38 a) Consider, in addition to Stockbridge type aeolian vibration dampers, also Spiral
39 aeolian vibration dampers and Elastomeric aeolian vibration dampers
40
41 b) Consider the application of dampers on high temperature conductors, specifying
42 additional high temperature tests in clamp slip tests
43
44 c) Simplify the procedure of the damper effectiveness evaluation
45
46 d) Introduce test at low temperature on fastener components such as break away bolts
47 and conical spring washers
48
49 e) Update the normative references
50
51 f) Include figures showing the test arrangements for the main mechanical tests
52
53 Annexes A and C form an integral part of this standard.
54 Annex B and D are for information only.

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55
56 The text of this standard is based on the following documents:
FDIS Report on voting
11/140/FDIS 11/142/RVD
57
58 Full information on the voting for the approval of this standard can be found in the report on
59 voting indicated in the above table.
60 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
61
62 The committee has decided that the contents of this document will remain unchanged until
63 the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
64 related to the specific document. At this date, the document will be
65
66 reconfirmed,
67 withdrawn,
68 replaced by a revised edition, or
69 amended
70

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71 OVERHEAD LINES –
72 REQUIREMENTS AND TESTS FOR AEOLIAN VIBRATION DAMPERS
73
74 1 Scope
75 This International Standard applies to aeolian vibration dampers intended for single
76 conductors or earth wires or conductor bundles where dampers are directly attached to each
77 subconductor.
78 The purchaser may adopt part(s) of this standard when specifying requirements for cables
79 different from those mentioned above (e.g. optical ground wires (OPGW), all dielectric self-
80 supporting optical cables (ADSS)).
81 In some cases, test procedures and test values are left to agreement between the purchaser
82 and the supplier and are stated in the procurement contract.
83 Annex A lists the minimum technical details to be agreed between purchaser and supplier.
84 Throughout this standard, the word “conductor” is used when the test applies to dampers for
85 conductors or earth wires.
86 2 Normative references
87 The following normative documents contain provisions which, through reference in this text,
88 constitute provisions of this International Standard. At the time of publication, the editions
89 indicated were valid. All normative documents are subject to revision, and parties to
90 agreements are encouraged to investigate the possibility of applying the most recent editions
91 of the normative documents indicated below. Members of IEC and ISO maintain registers of
92 currently valid International Standards.
93
94 IEC 60050(466):1990, International Electrotechnical Vocabulary (IEV) – Chapter 466:
95 Overhead lines
96 IEC 61284:1997, Overhead lines – Requirements and tests for fittings
97 IEC 60888:1987, Zinc-coated steel wires for stranded conductors
98 IEC 62567: 2013, Methods for testing self-damping characteristics of stranded conductors for
99 overhead lines
100 ISO 1461: 2009, — Hot dip galvanized coatings on fabricated iron and steel articles -
101 Specifications and test methods
102 ISO 2859-1:1999, Sampling procedures for inspection by attributes – Part 1: Sampling
103 schemes indexed by acceptable quality limit (AQL) for lot-by-lot inspection + Ammendment 1
104 (2011)
105
106

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107 ISO 2859-2:1985, Sampling procedures for inspection by attributes – Part 2: Sampling plans
108 indexed by limiting quality level (LQ) for isolated lot inspection
109 ISO 3951-1:2013, Sampling procedures for inspection by variables -- Part 1: Specification for
110 single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a
111 single quality characteristic and a single AQL
112 ISO 3951-2:2013, Sampling procedures for inspection by variables -- Part 2: General
113 specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot
114 inspection of independent quality characteristics
115 ISO 9000:2015, Quality management systems – Fundamentasl and vocabularies
116 ISO 9001:2015, Quality management systems – Requirements
117 ISO 9004:2018, Managing for the sustained success of an organization – A quality
118 management approach
119 ISO 10684:2008, Fasteners – Hot dip galvanized coatings
120 3 Definitions
121 For the purpose of this International Standard, the definitions of the International
122 Electrotechnical Vocabulary (IEV) apply, in particular IEC 60050(466). Those which differ or
123 do not appear in the IEV are given below.
124 3.1 stockbridge-type aeolian vibration damper
125 Device comprising a steel cable with a weight at each end and one bolted clamp or a helical rod
126 attachment, attachable to a conductor, for the purpose of damping aeolian vibration
127 3.2 spiral aeolian vibration damper (SVD)
128 Device made of helical plastic which wraps around the conductor for purposes of damping aeolian
129 vibration (these are commonly used on earth wires, OPGW and ADSS cables).
130 3.3 elastomeric aeolian vibration damper
131 Device comprising suspended weights connected to elastomeric articulations and one bolted clamp or
132 a helical rod attachment, attachable to a conductor for the purpose of damping aeolian vibration.
133 1.1 3.4 high temperature conductors (HTC)
134 1.2 conductors which are designed to have a maximum continuous operating temperature
135 over 95°C.
136 3.5 maximum continuous operating temperature
137 conductor temperature specified by the manufacturer and measured at the outer wire layers
138 4 General requirements
139 4.1 Design
140 The damper shall be designed so as to
141 – damp aeolian vibration;
142 – withstand mechanical loads imposed during installation, maintenance and specified
143 service conditions;
144 – avoid damage to the conductor under specified service conditions;
145 – be capable of being removed and re-installed without damage to the conductor;
146 – be free from unacceptable levels of corona and radio interference under all service
147 conditions, when installed on phase conductors;
148 – be suitable for safe and easy installation. The clamp design shall retain all parts when
149 opened for attachment to conductor. Furthermore, the clamp design shall be such that the

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150 damper, during installation, can be suspended on the conductor before tightening the
151 clamp;
152 – ensure that individual components will not become loose in service;
153 – maintain its function over the entire service temperature range;
154 – avoid audible noise;
155 – prevent water collection.
156 NOTE – Other desirable characteristics which are not essential to the basic functions of the damper but which may
157 be advantageous include:
158 – verification of proper installation from the ground;
159 – easy installation and removal from energized lines.
160 In the case of vibration dampers for conductors or earth wires containing integral fibre optic elements (or an
161 externally applied optical cable wrapped around the earth wire) the possible effects of the damper on these fibre
162 optic elements should be accounted for.
163 4.2 Materials
164 The materials shall conform to the requirements of IEC 61284.
165 4.3 Mass, dimensions and tolerances
166 Damper mass and significant dimensions, including appropriate tolerances, shall be shown on
167 contract drawings.
168 4.4 Protection against corrosion
169 In addition to the applicable requirements of IEC 61284, the messenger cable (including cut
170 ends when exposed) shall be protected against corrosion, e.g. in accordance with IEC 60888
171 for hot dip galvanized steel wire.
172 4.5 Manufacturing appearance and finish
173 The dampers shall be free of defects and irregularities; they shall have all outside surfaces
174 smooth and all edges and corners well-rounded.
175 4.6 Marking
176 The fitting marking requirements of IEC 61284 shall be applied to all clamp assemblies
177 including those using breakaway bolts. On spiral dampers, the markings should be on the
178 plastic rod.
179 4.7 Installation instructions
180 The supplier shall provide a clear and complete description of the recommended installation
181 procedure including in-span positions.
182 5 Quality assurance
183 A quality assurance programme taking into account the requirements of this standard can be
184 used by agreement between the purchaser and the supplier to verify the quality of the
185 vibration dampers during the manufacturing process.
186 Detailed information on the use of quality assurance is given in a system as per ISO 9001 or
187 similar.
188 It is recommended that test equipment used to verify compliance to this standard is routinely
189 maintained and calibrated in accordance with a relevant quality standard.

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

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235 6.4 Table of tests to be applied
236 The following Table 1 indicates the tests which shall be performed. These are marked with an
237 "X" in the table.
238 However, the purchaser may specify additional tests which are included in the table and
239 marked with an "O".
240 Units or components damaged during the test shall be excluded from the delivery to the
241 customer.
242 Table 1 – Tests on dampers
Subclause Test Type Sample Routine
test test test
7.1 Visual examination X X O
7.2 Verification of dimensions, materials and mass X X
7.3 Corrosion protection tests X X
7.4 Non-destructive tests O O O
7.5 Clamp slip test X O
7.6 Breakaway bolt test X X
7.7 Clamp bolt tightening test X X
7.8 Attachment of weights to messenger cable X X
7.9 Attachment of clamp to messenger cable test X X
1)
7.10 Corona and radio interference voltage (RIV) tests  X
7.11 Damper performance tests
7.11.2 – Damper characteristic test X O
7.11.3 – Damper effectiveness evaluation X
7.12 Damper fatigue test 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
244 7 Test methods
245 7.1 Visual examination
246 Type tests shall include visual examination to ascertain conformity of the dampers in all
247 essential respects, with the manufacturing or contract drawings. Deviations from the drawings
248 shall be subject to the approval of the purchaser and shall be appropriately documented as an
249 agreed concession.
250 Sample tests and, if required, routine tests shall include visual examination to ensure
251 conformity of manufacturing process, shape, coating and surface finish of the damper with the
252 contract drawings. Particular attention shall be given to markings required and to the finish of
253 surfaces which come into contact with the conductor. The sample test procedure and
254 acceptance criteria shall be agreed between the purchaser and the supplier.
255 For dampers subjected to corona type test, the sample test shall include a comparison of
256 shape and surface finish with one of the corona type test samples when specified by the
257 purchaser.

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258 7.2 Verification of dimensions, materials and mass
259 Type and sample tests shall include verification of dimensions to ensure that dampers are
260 within the dimensional tolerances stated on contract drawings. The purchaser may choose to
261 witness the measurement of selected dimensions or may inspect the supplier's documentation
262 when this is available.
263 Type and sample tests shall also include verification of materials to ensure that they are in
264 accordance with contract drawings and documents. This verification shall normally be carried
265 out by the purchaser inspecting the supplier's documentation relating to material
266 specifications, certificates of conformity or other quality documentation.
267 The total mass of the damper complete with all its components shall comply with the mass
268 shown on the contrac
...