1、BRITISH STANDARD BS EN 50289-3-4:2001 Communication cables Specifications for test methods Part 3-4: Mechanical test methods Tensile strength, elongation and shrinkage of insulation and sheath The European Standard EN 50289-3-4:2001 has the status of a British Standard ICS 33.120.10 NO COPYING WITHO
2、UT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 50289-3-4:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 13 November 200
3、1 BSI 13 November 2001 ISBN 0 580 38686 4 National foreword This British Standard is the official English language version of EN 50289-3-4:2001. The UK participation in its preparation was entrusted by Technical Committee EPL/46, Cables, wire and waveguides, RF connectors, and accessories for commun
4、ication and signalling, 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. Cross-references The British Standards which implement international or European publications
5、 referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International 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
6、of a 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. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretati
7、on, 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, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cove
8、r. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50289-3-4 NORME EUROPENNE EUROPISCHE NORM August 2001 CENELEC European Committee for Electrotechnical Standardization Comit
9、 Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50289-3-4:2001 E ICS 33.12
10、0.10 English version Communication cables - Specifications for test methods Part 3-4: Mechanical test methods - Tensile strength, elongation and shrinkage of insulation and sheath Cbles de communication - Spcifications des mthodes dessai Partie 3-4: Mthodes dessais mcaniques - Rsistance la traction,
11、 allongement et rtraction de lisolant et de la gaine Kommunikationskabel - Spezifikationen fr Prfverfahren Teil 3-4: Mechanische Prfverfahren - Schrumpf der Isolierung This European Standard was approved by CENELEC on 2001-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regu
12、lations which stipulate 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. Th
13、is European Standard 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 membe
14、rs are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN 50289-3-4:2001 - 2 - Foreword This European Standard wa
15、s prepared by the Technical Committee CENELEC TC 46X, Communication cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50289-3-4 on 2001-03-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publica
16、tion of an identical national standard or by endorsement (dop) 2002-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-04-01 This European Standard has been prepared under the European Mandate M/212 given to CENELEC by the European Commission an
17、d the European Free Trade Association.- 3 - EN 50289-3-4:2001 Contents 1 Scope.4 2 Normative references .4 3 Definitions .4 4 Test values.4 5 Applicability.4 6 Pre-conditioning 4 7 Test temperature5 8 Elongation .5 9 Tensile strength.5 10 Shrinkage.5 10.1 Sampling .5 10.1.1 Sample length.5 10.1.2 Pr
18、eparation of test pieces5 10.2 Procedure 5 10.3 Expression of results.5 11 Test report .6EN 50289-3-4:2001 - 4 - 1 Scope This Part 3-4 of EN 50289 details the method of test to determine the tensile strength, elongation and shrinkage of insulation and sheath of cables used in analogue and digital co
19、mmunication systems. 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. These normative references are cited
20、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 undated references the latest edition o
21、f 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 EN 60811-1-1 1995 Insulating and sheathing ma
22、terials of electric and optical cables - Common test methods - Part 1-1: General application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties 3 Definitions For the purposes of this European Standard the definitions of EN 50290-1-2 apply. 4 Test valu
23、es Full test conditions (such as temperature, duration, etc.) and full test requirements are not specified in this standard; it is intended that they should be specified by the standard dealing with the relevant type of material. 5 Applicability Conditioning values and testing parameters are specifi
24、ed for the most common types of insulating compounds. 6 Pre-conditioning The test shall be carried out not less than 16 h after the extrusion or cross linking of the insulation compound. If the test is carried out at ambient temperature, the test pieces shall be kept for at least 3 h at a temperatur
25、e of 23 C 5 C.1)At draft stage.- 5 - EN 50289-3-4:2001 7 Test temperature Unless otherwise specified, the test shall be carried out at ambient temperature. 8 Elongation Elongation tests shall be performed in accordance with clause 9 of EN 60811-1-1. 9 Tensile strength Tensile strength tests shall be
26、 performed in accordance with clause 9 of EN 60811-1-1. 10 Shrinkage 10.1 Sampling 10.1.1 Sample length One sample about 1,5 L in length of each core to be tested shall be taken at least 0,5 m away from each end of the cable length. L is the length given in the relevant cable standard. 10.1.2 Prepar
27、ation of test pieces Within an interval of not more than 5 min from the time of cutting the samples, a test length of L 5 mm shall be marked on the middle part of each piece of core. The distance between the marks shall be measured to an accuracy of 0,5 mm. Each test piece shall then be prepared by
28、cutting and removing the insulation from both ends of each sample up to positions between 2 mm and 5 mm away from the marks. 10.2 Procedure The test pieces shall be supported horizontally in an air oven by the bare ends of conductors or on the surface of a talc bath, to permit free movement of the i
29、nsulation. They shall be heated at the temperature and for the time specified in the standard for the type of cable. The test pieces shall then be allowed to cool in air to room temperature and the distance between the two marks on each piece measured again to the nearest 0,5 mm. 10.3 Expression of
30、results The difference between the marks before the heat treatment and after the heating and cooling shall be recorded as a percentage of the distance between the marks before the treatment.EN 50289-3-4:2001 - 6 - 11 Test report The test report shall include: - temperature, - sample length, - shrink
31、age - elongation, - tensile strength.blankBS EN 50289-3-4:2001 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. I
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