1、BRITISH STANDARD 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 BS EN 50289-3-5:200 1 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PER
2、MITTED BY COPYRIGHT LAW - BS EN 50289-3-52001 Amd. No. National foreword Date Comments 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 EPL146, Cables, wire and waveguides, RF connectors,
3、 and accessories for communication and signalling, to Subcommittee EPL/46/1, Communication cables, which has the responsibility to: - - 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 in
4、terests 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 publicatio
5、ns 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 Cat alo gue . A British Standard does not purport to include all the necessary provisi
6、ons 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. This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strateg
7、y Committee, was published under the authority of the Standards Policy and Strategy Committee on 13 November 2001 O BSI 13 November 2001 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 copy
8、right date displayed in this document indicates when the document was last issued. Amendments issued since publication ISBN O 580 38688 O EUROPEANSTANDARD EN 50289-3-5 NORME EUROPENNE EUROPISCHE NORM August 2001 ICs 33.120.10 English version Communication cables - Specifications for test methods Par
9、t 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: Mechanische Prfverfahren - Querdruckbestndigke
10、it des Kabels This European Standard was approved by CENELEC on 2001-05-01. CENELEC members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bi
11、bliographical 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 made by translation under the responsibi
12、lity 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, Germany, Greece, Iceland, Ireland, Italy, L
13、uxembourg, 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 Centrai Secretariat: rue de Stassart 35, B - 1050
14、Brussels O 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 EN 50289-3-512001 -2- Foreword This European Stanc-rd was prepared by the Technical Committee CENELEC TC 46X, Communication cables. The text of the d
15、raft was submitted to 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
16、 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 and the European Free Trade Association. -3- EN50289-3-5:2001 Contents 1 Scope 4 2 Normati
17、ve references 4 3 Definitions . 4 4 Test method . 4 4.1 Equipment . 4 4.2 Test sample . 4 4.3 Procedure 5 4.4 Requirements 5 4.4. I Coaxial cables . 5 4.4.2 Symmetrical cables . . 5 4.4.3 Optical cables . 6 5 Test report . 6 EN 50289-3-5:2001 -4- 1 Scope This Part 3-5 of EN 50289 details the method
18、of test to determine the crush resistance 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 undate
19、d reference, provisions from other 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 in
20、corporated in it by amendment or 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” Commu
21、nication cables - Part 1-2: Definitions 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 cr
22、ushing force uniformly over a 100 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 I. 4.2 Test sample The sample shall be of a length sufficient t
23、o carry out the test specified. 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
24、 the cable. ) At drafi stage. -5- 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).
25、 The load (F) as indicated in the 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 :I If requested in the relevant specification, an additional or alternative test m
26、ay be performed by inserting one or more steel mandrels (25 mm in diameter unless otherwise specified in the detail specification) perpendicular to the sample, to represent particular operational conditions. 2F / Cable under test radius o I V 100 mm Figure 1 - Crushing test 4.4 Requ i remen ts 4.4.1
27、 Coaxial cables After the load has been removed the magnitude of the impedance 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 c
28、ables After the test, the transmission characteristics shall be within the limiting values specified in the relevant specification. EN 50289-3-512001 -6- 4.4.3 Optical cables After the test, the transmission characteristics shall be within the limiting values specified in the relevant specification.
29、 5 Test report The test report shall include: value of the force F, distance of the crushed region to the end of the sample, electrical loptical tests and their requirements, number of tests performed, temperature, sample length, passlfail criteria. BS EN 50289-3-5:2001 BSI 389 Chiswick High Road Lo
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