BS EN 50289-3-5-2001 Communication cables - Specifications for test methods - Mechanical test methods - Crush resistance of the cable《通信电缆 试验方法规范 机械试验方法 电缆抗破碎性》.pdf

1、BRITISH STANDARD BS EN 50289-3-5:2001 Communication cables Specifications for test methods Part 3-5: Mechanical test methods Crush resistance of the cable The European Standard EN 50289-3-5:2001 has the status of a British Standard ICS 33.120.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED

2、BY COPYRIGHT LAWBS EN 50289-3-5:2001 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 2001 BSI 13 November 2001 ISBN 0 580 3868

3、8 0 National foreword This British Standard is the official English language version of EN 50289-3-5:2001. The UK participation in its preparation was entrusted by Technical Committee EPL/46, Cables, wire and waveguides, RF connectors, and accessories for communication and signalling, to Subcommitte

4、e 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 referred to in this document may be f

5、ound 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 of a contract. Users of British Standa

6、rds 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 interpretation, or proposals for change, and keep

7、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 cover. The BSI copyright date displayed in

8、 this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50289-3-5 NORME EUROPENNE EUROPISCHE NORM August 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechn

9、ique 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 50289-3-5:2001 E ICS 33.120.10 English version Communication cab

10、les - Specifications for test methods Part 3-5: Mechanical test methods - Crush resistance of the cable Cbles de communication - Spcifications des mthodes dessai Partie 3-5: Mthodes dessais mcaniques - Rsistance lcrasement du cble Kommunikationskabel - Spezifikationen fr Prfverfahren Teil 3-5: Mecha

11、nische Prfverfahren - Querdruckbestndigkeit des Kabels This European Standard was approved by CENELEC on 2001-05-01. 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 withou

12、t 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

13、 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, Ge

14、rmany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN 50289-3-5:2001 - 2 - Foreword This European Standard was prepared by the Technical Committee CENELEC TC 46X, Communication cables. The text of the draft was submitted t

15、o the formal vote and was approved by CENELEC as EN 50289-3-5 on 2001-05-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-04-01 latest date by which the national stand

16、ards 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 and the European Free Trade Association.- 3 - EN50289-3-5:2001 Contents 1 Scope 4 2 Normative references 4 3 Defini

17、tions . 4 4 Test method. 4 4.1 Equipment. 4 4.2 Test sample. 4 4.3 Procedure 5 4.4 Requirements 5 4.4.1 Coaxial cables 5 4.4.2 Symmetrical cables. 5 4.4.3 Optical cables. 6 5 Test report . 6EN 50289-3-5:2001 - 4 - 1 Scope This Part 3-5 of EN 50289 details the method of test to determine the crush re

18、sistance of the cable used in analogue and digital communication 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 othe

19、r publications. These 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

20、revision. For undated 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: Def

21、initions 3 Definitions For the purposes of this European Standard the definitions of EN 50290-1-2 apply. 4 Test method 4.1 Equipment The apparatus shall allow a sample of cable to be crushed between a flat steel base plate and a movable steel plate which applies the crushing force uniformly over a 1

22、00 mm length of the sample. The edges of the movable plate shall be rounded with a radius of about 5 mm. They are not included in the 100 mm flat part of this plate. A suitable apparatus is shown in Figure 1. 4.2 Test sample The sample shall be of a length sufficient to carry out the test specified.

23、 For small cables (less than 5 mm outer diameter) the cables may be tested forming a loop (top of Figure 1) in this case the force to be applied is twice the specified force. The radius of the loop shall be large enough not to affect the transmission characteristics of the cable.1)At draft stage.- 5

24、 - EN50289-3-5:2001 4.3 Procedure The cable sample shall be mounted on the base plate of the test apparatus so that lateral movement is prevented. The cable specimen is compressed by a parallel flat movable steel plate with rounded edges applying a load (see Figure 1). The load (F) as indicated in t

25、he relevant cable specification shall be applied gradually without any abrupt change for a duration of 2 minutes. If incremental loading is used the steps shall not exceed a ratio of 1,5 :1 If requested in the relevant specification, an additional or alternative test may be performed by inserting on

26、e or more steel mandrels (25 mm in diameter unless otherwise specified in the detail specification) perpendicular to the sample, to represent particular operational conditions. Figure 1 - Crushing test 4.4 Requirements 4.4.1 Coaxial cables After the load has been removed the magnitude of the impedan

27、ce irregularity introduced by the test shall be measured by a pulse or TDR method. After the test, the reflection characteristics shall be within the limiting values specified in the detail specification. 4.4.2 Symmetrical cables After the test, the transmission characteristics shall be within the l

28、imiting values specified in the relevant specification.EN 50289-3-5:2001 - 6 - 4.4.3 Optical cables After the test, the transmission characteristics shall be within the limiting values specified in the relevant specification. 5 Test report The test report shall include: - value of the force F, - dis

29、tance of the crushed region to the end of the sample, - electrical /optical tests and their requirements, - number of tests performed, - temperature, - sample length, - pass/fail criteria.blankBS EN 50289-3-5:2001 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the

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