1、BRITISH STANDARD Communication cables - Specifications for test methods - Part 3-2: Mechanical test methods - Tensile strength and elongation for conductor The European Standard EN 50289-3-2:2001 has the status of a British Standard ICs 33.120.10 BS EN 50 289-3-2 :20 O 1 NO COPYING WITHOUT BSI PERMI
2、SSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 50289-3-2:ZOOl National foreword This British Standard is the official English language version of The UK participation in its preparation was entrusted by Technical Committee EPL46, Cables, wire and waveguides, RF connectors, and accessories for comm
3、unication and signalling, to Subcommittee EPL/46/1, Communication cables, which has the responsibility to: EN 50289-3-2:2001. - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interest
4、s informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications ref
5、erred to in this document may be found in the BSI Standards Catalogue under the section entitled lnternational Standards Correspondence 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
6、contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having Summary of pages This document comprises a front cover, an inside front cover, the EN title
7、page, been prepared under the direction of the Electrotechnical Sector policv and Strategy Committee, was published under the authority ofthe Standards policy and pages 2 to 5 and a back cover. The BSI copyright date displayed in this document indicates when the Strategy Committee on 14 November 200
8、1 document was last issued. Amendments issued since publication Amd. No. IDate I Comments Q BSI 14 November 2001 ISBN O 580 38687 2 EUROPEAN STANDARD EN 50289-3-2 NORME EUROPENNE EUROPISCHE NORM August 2001 ICs 33.120.10 English version Communication cables - Specifications for test methods Part 3-2
9、: Mechanical test methods - Tensile strength and elongation for conductor Cbles de communication - Spcification des mthodes dessais Partie 3-2: Mthodes dessais mcaniques - Rsistance la traction et allongement des conducteurs Kommuni kations ka bel - Spezifikationen fr Prfverfahren Teil 3-2: Mechanis
10、che Prfverfahren - Zugfestigkeit und Dehnung fr Leiter This European Standard was approved by CENELEC on 2001-07-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without
11、 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 language
12、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, France, Ger
13、many, 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 Central Se
14、cretariat: rue de Stascart 35, B - 1050 Brussels O 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 502893-2:2001 E EN 50289-3-212001 -2- Foreword This European Standard was prepared by the Technical Committee CENELEC TC 46X,
15、Communication cables. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50289-3-2 on 2001-07-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standa
16、rd or by endorsement (dop) 2002-08-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-08-01 This European Standard has been prepared under the European Mandate M212 given to CENELEC by the European Commission and the European Free Trade Associati
17、on. -3- EN 50289-3-2:2001 Contents 1 Scope . 4 2 Normative references . 4 3 Definitions . 4 4 Test method . 4 4 . I Tensile strength and elongation after break for metals 4 4 . I . I Principle . 4 4.1.2 Procedure 4 Tensile strength and elongation at break for metals . 5 4.2. I Principle . 5 4.2.2 Te
18、st equipment . 5 4.2.4 Expression of results . 5 4.2 4.2.3 Procedure 5 5 Test report . 5 EN 50289-3-2:2001 -4- 1 Scope This Part 3-2 of EN 50289 details the methods of test to determine the tensile strength and elongation of conductors of cables used in analogue and digital communication systems. It
19、 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. These normative references are cited at the appropriate plac
20、es 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 undated references the latest edition of the publication refer
21、red 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 Communication cables - Part 1-2: Definitions ISOIR402 Tensile testing of copper and copper alloy wire 3 Definitions
22、For the purposes of this European Standard the definitions of EN 50290-1-2 apply. 4 Test method 4. I Tensile strength and elongation after break for metals. 4.1 .I Principle The test determines the maximum load and the plastic extension of the solid conductor with high elongation. (e.g. aluminium, c
23、opper) 4.1 -2 Procedure At least five test specimens shall be tested in accordance with the method specified in ISOIR 402 with a rate of separation of the jaws of 1 O0 mm f 20 mmhin. ) At draft stage. -5- EN 50289-3-2:2001 4.2 Tensile strength and elongation at break for metals 4.2.1 Principle The t
24、est determines the percentage elongation at the time of break of a solid conductor with low elongation of about 1% (e.g. steel). 4.2.2 Test equipment An extensometer or other device suitable for measuring elongation of a gauge length of 250 mm shall be used. The equipment shall have a resolution not
25、 worse than 0,25 mm. 4.2.3 Procedure At least five test specimens shall tested. Each of them shall successively be fitted in the jaws of the testing machine and loaded to 10 percent of the minimum specified breaking load. An extensometer or other suitable device shall be attached to the test specime
26、n to measure the extension. The elongation versus the load shall be observed while applying a tensile load to the specimen. The reading of elongation and tensile load at break shall be recorded. The rate of separation of the jaws shall not be greater than 100 rnm f 20 mm/min. Tests in which the frac
27、ture occurs within 25 mm apart from the jaws or extensometer clamps shall be disregarded and a repeat test shall be carried out 4.2.4 Expression of results The elongation at break shall be expressed as a percentage of the original sample length. Tensile load shall be expressed in N/rnm2. 5 Test repo
28、rt The test report shall include: - temperature, - sample length, - - elongation of each of the specimens, breaking load for each of the specimens. BS EN 5 O 289-3-2:2 O0 1 BSI 389 Chiswick High Road London W4 4AL BSI - British Standards Institution BSI is the independent national body responsible f
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