1、BRITISH STANDARD BS EN 61897:1999 IEC61897:1998 Overhead lines Requirements and tests for Stockbridge type aeolian vibration dampers The European Standard EN 61897:1998 has the status of a BritishStandard ICS 29.240.20BSEN 61897:1999 This British Standard, having been prepared under the directionof
2、the Electrotechnical Sector Committee, was publishedunder the authority ofthe Standards Committee andcomes into effect on 15February 1999 BSI 05-1999 ISBN 0 580 30937 1 National foreword This British Standard is the English language version of EN 61897:1998. It is identical with IEC 61897:1998. The
3、UK participation in its preparation was entrusted to Technical Committee PEL/11, Overhead lines, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep t
4、he UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number.
5、 For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an a
6、nnex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Corre
7、spondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does no
8、t of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 18, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments i
9、ncorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN61897:1999 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61897 5ii blankEUROPEAN STANDARD NORME EUROPENNE EUROP
10、ISCHE NORM EN 61897 October 1998 ICS 29.240.20 Descriptors: Overhead electrical line, electrical conductor, damping, vibration, requirement, design, quality assurance, classification, test, effectiveness, visual examination, protection against corrosion, non-destructive test, verification of dimensi
11、on, mechanical test, fatigue test English version Overhead lines Requirements and tests for Stockbridge type aeolian vibration dampers (IEC 61897:1998) Lignes ariennes Exigences et essais applicables aux amortisseurs de vibrationsoliennes Stockbridge (CEI 61897:1998) Freileitungen Anforderungen und
12、Prfungenfr Schwingungsdmpfer TypStockbridge (IEC 61897:1998) This European Standard was approved by CENELEC on1998-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard w
13、ithout any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other lan
14、guage made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, Franc
15、e, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Cent
16、ral Secretariat: rue de Stassart 35, B-1050 Brussels 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61897:1998 EEN61897:1998 BSI 05-1999 2 Foreword The text of document 11/140/FDIS, future edition1of IEC 61897, prepared by IEC
17、 TC 11, Overhead lines, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61897 on 1998-10-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this
18、standard, Annex A , Annex C and Annex ZA are normative and Annex B is informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC61897:1998 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 5 2
19、 Normative references 5 3 Definitions 5 4 General requirements 5 4.1 Design 5 4.2 Materials 6 4.3 Mass, dimensions and tolerances 6 4.4 Protection against corrosion 6 4.5 Manufacturing appearance and finish 6 4.6 Marking 6 4.7 Installation instructions 6 5 Quality assurance 6 6 Classification of tes
20、ts 6 6.1 Type tests 6 6.1.1 General 6 6.1.2 Application 6 6.2 Sample tests 6 6.2.1 General 6 6.2.2 Application 6 6.2.3 Sampling, acceptance criteria 6 6.3 Routine tests 7 6.3.1 General 7 6.3.2 Application and acceptance criteria 7 6.4 Table of tests to be applied 7 7 Test methods 8 7.1 Visual examin
21、ation 8 7.2 Verification of dimensions, materials andmass 8 7.3 Corrosion protection tests 8 7.3.1 Hot dip galvanized components (other thanmessenger cable wires) 8 7.3.2 Ferrous components protected from corrosionby methods other than hot dip galvanizing 8 7.3.3 Hot dip galvanized messenger cable w
22、ires 8 7.4 Non-destructive tests 8 7.5 Clamp slip test 8 7.6 Breakaway bolt test 9 7.7 Clamp bolt tightening test 9 7.8 Attachment of weights to messenger cable 9 7.9 Attachment of clamp to messenger cable test 9 latest date by which the ENhas to be implemented atnational level by publication of an
23、identical national standard or by endorsement (dop) 1999-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2001-07-01EN 61897:1998 BSI 05-1999 3 Page 7.10 Corona and radio interference voltage(RIV)tests 9 7.11 Damper performance tests 9 7.11.1 Perfo
24、rmance test variants 9 7.11.2 Damper characteristic test 10 7.11.3 Damper effectiveness evaluation 11 7.11.3.1 Methods of evaluation 11 7.11.3.2 Laboratory test 11 7.11.3.3 Field test 12 7.11.3.4 Analytical method 12 7.12 Damper fatigue test 12 7.12.1 Test methods 12 7.12.2 Swept frequency method 12
25、 7.12.3 Resonant frequency method 12 7.12.4 Acceptance criteria 13 Annex A (normative) Minimum technicaldetailstobe agreed between purchaserand supplier 14 Annex B (informative) Examples of graphsrelevantto damper characteristic test 15 Annex C (normative) Wind power input curve 16 Annex ZA (normati
26、ve) Normative referencestointernationalpublications withtheircorresponding European publications Inside back cover Bibliography 18 Figure 1 Test rig for laboratory testofdampereffectiveness 13 Figure B.1 Examples of graphs relevant todamper characteristic test (damper withtworesonant frequencies) 15
27、 Figure C.1 Wind power input curve 16 Table 1 Tests on dampers 7 Table 2 Acceptance criteria 104 blankEN 61897:1998 BSI 05-1999 5 1 Scope This International Standard applies to Stockbridge type aeolian vibration dampers intended for single conductors or earth wires or conductor bundles where dampers
28、 are directly attached to each subconductor. The purchaser may adopt part(s) of this standard when specifying requirements for other types of aeolian vibration dampers or for Stockbridge dampers used on conductors or cables different from those mentioned above (e.g. optical ground wires, all dielect
29、ric self-supporting optical cables). In many 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 standa
30、rd, the word “conductor” is used when the test applies to Stockbridge dampers for conductors or earth wires. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publica
31、tion, the editions indicated were valid. All normarive documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and I
32、SO maintain registers of currently valid International Standards. IEC 60050(466):1990, International Electrotechnical Vocabulary (IEV) Chapter466:Overhead lines. IEC 61284:1997, Overhead lines Requirements and tests for fittings. IEC 60888:1987, Zinc-coated steel wires for stranded conductors. ISO 1
33、461, Hot dip galvanized coatings on fabricated ferrous products Specifications 1) . ISO 2859-1:1989, Sampling procedures for inspection by attributes Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. ISO 2859-2:1985, Sampling procedures for inspection by att
34、ributes Part 2: Sampling plans indexed by limiting quality level (LQ) for isolated lot inspection. ISO 3951:1989, Sampling procedures and charts for inspection by variables for percent nonconforming. 3 Definitions For the purpose of this International Standard, the definitions of the International E
35、lectrotechnical Vocabulary (IEV) apply, in particular IEC60050(466). Those which differ or do not appear in the IEV are given below. stockbridge-type aeolian vibration damper device comprising a messenger cable with a weight at each end and one bolted clamp, attachable to a conductor for the purpose
36、 of damping aeolian vibration 4 General requirements 4.1 Design The damper shall be designed so as to damp aeolian vibration; withstand mechanical loads imposed during installation, maintenance and specified service conditions; avoid damage to the conductor under specified service conditions; be cap
37、able of being removed and re-installed without damage to the conductor; be free from unacceptable levels of corona and radio interference under all service conditions; be suitable for safe and easy installation. The clamp design shall retain all parts when opened for attachment to conductor. Further
38、more, the clamp design shall be such that the damper, during installation, can be suspended on the conductor before tightening the clamp; ensure that individual components will not become loose in service; maintain its function over the entire service temperature range; avoid audible noise; prevent
39、water collection. NOTEOther desirable characteristics which are not essential to the basic functions of the damper but which may be advantageous include: verification of proper installation from the ground; ease of installation and removal from energized lines. In the case of vibration dampers for c
40、onductors or earth wires containing integral fibre optic elements (or an externally applied optical cable wrapped around the earth wire) account should be made of the possible effects of the damper on these fibre optic elements. 1) To be published.EN 61897:1998 6 BSI 05-1999 4.2 Materials The materi
41、als shall conform to the requirements of IEC 61284. 4.3 Mass, dimensions and tolerances Damper mass and significant dimensions, including appropriate tolerances, shall be shown on contract drawings. 4.4 Protection against corrosion In addition to the applicable requirements of IEC61284, the messenge
42、r cable (including cut ends if applicable) shall be protected against corrosion, e.g. in accordance with IEC 60888 for hot dip galvanized steel wire. 4.5 Manufacturing appearance and finish The dampers shall be free of defects and irregularities; they shall have all outside surfaces smooth and all e
43、dges and corners well-rounded. 4.6 Marking The fitting marking requirements of IEC 61284 shall be applied to all clamp assemblies including those using breakaway bolts. 4.7 Installation instructions The supplier shall provide a clear and complete description of the recommended installation procedure
44、 including in-span positions. 5 Quality assurance A quality assurance programme taking into account the requirements of this standard can be used by agreement between the purchaser and the supplier to verify the quality of the vibration dampers during the manufacturing process. Detailed information
45、on the use of quality assurance is given in ISO 9000-1 1, ISO 9001 2, ISO90023, ISO 9003 4 and ISO 9004-1 5 2) . It is recommended that test equipment used to verify compliance to this standard is routinely maintained and calibrated in accordance with a relevant quality standard. 6 Classification of
46、 tests 6.1 Type tests 6.1.1 General Type tests are intended to establish design characteristics. They are normally made once and repeated only when the design or the material of the damper components is changed. The results of type tests are recorded as evidence of compliance with design requirement
47、s. 6.1.2 Application Dampers shall be subjected to type tests as per Table 1. Unless otherwise specified, each type test shall be performed on three test samples which are identical in all essential respects with dampers to be supplied under contract to the purchaser. All units shall pass the tests.
48、 The dampers used for tests during which no damage occurs to the units or their components may be used in subsequent tests. 6.2 Sample tests 6.2.1 General Sample tests are required to verify that the dampers meet the performance specifications of the type test samples. In addition, they are intended
49、 to verify the quality of material and workmanship. 6.2.2 Application Dampers shall be subjected to sample tests as per Table 1. The samples to be tested shall be selected at random from the lot offered for acceptance. The purchaser has the right to make the selection. The dampers used for tests during which no damage occurs to the units or their components may be used in subsequent tests. 6.2.3 Sampling, acceptance criteria. The sampling plan procedures according to ISO2859-1 and ISO 2859-2 (i
