1、BRITISH STANDARD BS EN 50289-3-13: 2003 Communication cables Specifications for test methods Part 3-13: Mechanical test methods Aeolian vibration The European Standard EN 50289-3-13:2003 has the status of a British Standard ICS 33.120.10 BS EN 50289- 3-13:2003 This British Standard, was published un
2、der the authority of the Standards Policy and Strategy Committee on 8 September 2003 BSI 8 September 2003 ISBN 0 580 42582 7 National foreword This British Standard is the official English language version of EN 50289-3-13:2003. The UK participation in its preparation was entrusted by Technical Comm
3、ittee EPL/46, Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories, to Subcommittee EPL/46/1, Communication cables, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cros
4、s-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of
5、British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pr
6、esent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, a
7、n inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50289-3-13 NORME EUROPENNE EUR
8、OPISCHE NORM August 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form a
9、nd by any means reserved worldwide for CENELEC members. Ref. No. EN 50289-3-13:2003 E ICS 33.120.10 English version Communication cables - Specifications for test methods Part 3-13: Mechanical test methods - Aeolian vibration Cbles de communication - Spcification des mthodes dessais Partie 3-13: Mth
10、odes dessais mcaniques - Vibration olienne Kommunikationskabel - Spezifikationen fr Prfverfahren Teil 3-13: Mechanische Prfverfahren - Seilschwingen This European Standard was approved by CENELEC on 2003-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipu
11、late the conditions for giving this European Standard the status of a national standard without 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 Standar
12、d exists in three official versions (English, French, German). A version in any other language 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
13、 electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EN 50289-3-13:2003 2 Foreword This Euro
14、pean Standard was prepared by the Technical Committee CENELEC TC 46X, Communication cables. The text of the draft was submitted to the Unique Acceptance Procedure and was accepted by CENELEC as EN 50289-3-13 on 2003-04-01. The following dates were fixed: - latest date by which the EN has to be imple
15、mented at national level by publication of an identical national standard or by endorsement (dop) 2004-04-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-04-01 This European Standard has been prepared under the European Mandate M/212 given to
16、CENELEC by the European Commission and the European Free Trade Association. _ 3 EN 50289-3-13:2003 Contents 1 Scope. 4 2 Normative references . 4 3 Definitions 4 4 Test method. 4 4.1 Sample. 4 4.2 Equipment.4 4.3 Procedure.5 4.4 Details to be specified . 6 5 Requirements. 6 6 Test report 6 Figure 1
17、Typical test arrangement for aeolian vibration test. 8 EN 50289-3-13:2003 4 1 Scope This Part 3-13 of EN 50289 details the method of test to determine the ability of exposed overhead cables used in analogue and digital communication systems to withstand dynamic stresses similar to those imposed by l
18、aminar wind flow induced vibrations in overhead lines. It is to be read in conjunction with Part 3-1 of EN 50289, which contains essential provisions for its application. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. The
19、se normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undat
20、ed references the latest edition of the publication referred to applies (including amendments). EN 50289-3-1 2001 Communication cables Specifications for test methods Part 3-1: Mechanical test methods General requirements EN 50290-1-2 1)Communication cables Part 1-2: Definitions 3 Definitions For th
21、e purposes of this European Standard the definitions of EN 50290-1-2 apply. 4 Test method 4.1 Sample The minimum length of the test sample shall be 50 m unless otherwise define in the relevant specification. The cable ends are prepared in order to allow transmitted electrical or optical power contro
22、l in one or several fibres (as specified in the relevant specification) or in conductors during the test. The minimum test length of the optical fibres shall be 100 m. If necessary, fibres have to be spliced at the cable ends. 4.2 Equipment The apparatus consists of test set up (a typical arrangemen
23、t is shown in Figure 1), electronically controlled shaker, dynamometer, load cell, calibrated beam or other device to measure cable tension. 1)At draft stage. 5 EN 50289-3-13:2003 Optical cables Light source with a nominal wavelength of 1 550 nm or 1 310 nm in conjunction with a light power meter, a
24、ble to perform optical power measurements. Light source with a nominal wavelength of 1 550 nm or 1 310 nm in conjunction with a light power meter, able to measure power oscillation in the bandwidth range of 0 Hz to 300 Hz minimum. OTDR, if required in the detail specification. Copper cables Network
25、analyser in the frequency range of interest. Tester for continuity. 4.3 Procedure The test sample shall be terminated at both ends prior to tensioning in a manner such that the cable elements are maintained in a condition representative of the normal installation conditions. A dynamometer, load cell
26、, calibrated beam or other device shall be used to measure cable tension. Some means should be provided to maintain constant tension to allow for temperature fluctuations during the testing. The cable shall be loaded to approximately 15 % to 25 % of the rated maximum tensile load for the cable as gi
27、ven in the relevant specification unless otherwise stated in accordance with particular use conditions. The overall span between system terminations shall be a minimum of 30 m. The minimum active span should be approximately 20 m, with a suitable suspension assembly located approximately two thirds
28、of the distance between the two dead-end assemblies. Longer active and / or back spans may be used. It shall be supported at a height such that the static sag angle of the cable to horizontal is (1,5 0,5) in the active span. Means shall be provided for measuring and monitoring the mid-loop (antinode
29、) vibration amplitude at a free loop, not a support loop. An electronically controlled shaker shall be used to excite the cable in the vertical plane. The shaker armature shall be securely fastened to the cable so it is perpendicular to the cable in the vertical plane. The shaker should be located i
30、n the span to allow for a minimum of six vibration loops between the suspension assembly and the shaker. The test shall be carried out at one or more resonance frequencies in the frequency range for the given wind conditions. Aeolian vibration is normally experienced under laminar wind flows of 0,5
31、m/s to 7 m/s. The following equations (1) and (2) apply. EN 50289-3-13:2003 6 The frequency of vibration f (Hz) is proportional to the wind velocity v (m/s) and inversely proportional to the cable diameter D (m) and is given by the formula: f = k v/D Hz (1) where k is Strouhal constant (0,2 for aeri
32、al cables and conductors). The wavelength () of vibration (equal to 2 loop lengths) is given by: = 1/f T/m m (2) where T is the cable tension (N); m is the mass / unit length (kg/m). NOTE If required due to the nature of cable design an overtension should be applied to ensure the cable is free of in
33、itial stresses. Therefore, in the initial stages the test span requires continuous attention and monitoring of the test parameters until the test span is stabilised. 4.4 Details to be specified The detail specification shall include the following: a) length of spans; b) characteristics of the suspen
34、sion and anchoring devices used; c) cable installation tension, including any overtension if applied during the first phase; d) frequency or wavelength at which optical monitoring is conducted; e) mass / unit length and diameter of the cable. 5 Requirements The acceptance criteria for the test shall
35、 be stated in the relevant specification. Typical failure modes include any temporary or permanent damage to the cable or any of the component parts, or change, in optical or electrical characteristics greater than the value specified in the relevant specification. 6 Test report The test report shal
36、l include the following: characteristics of the vibration test stand; length of spans; characteristics of the suspension and anchoring devices used; cable installation tension, including any overtension coefficient if applied during the first phase; length of cable and fibres tested (characteristics
37、 of the splices between fibres if they exist); frequency or wavelength at which power monitoring is conducted; 7 EN 50289-3-13:2003 vibration mode / characteristics maintained during the test; preparation of ends; characteristics of measuring equipment including the type of measuring sets and launch
38、ing conditions; ambient temperature and humidity during the test; pass/fail criteria. EN 50289-3-13:2003 8 Minimum 20 m Minimum 30 m Minimum 10 m 7 8 2 4 1 3 5 A 6 B 4 3 C 1Key 1 End abutment 7 Meter - in 2 Load cell 8 Meter - out 3 Intermediate abutment 4 Dead end assembly A Active span 5 Suitable
39、shaker B Back span 6 Suspension assembly C Fibre splice Figure 1 Typical test arrangement for aeolian vibration test blankBS EN 50289-3-13: 2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards
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