1、BS EN3475-515:2009ICS 49.060NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Cable, electrical,aircraft use TestmethodsPart 515: Crush resistanceThis British Standardwas published underthe authority of theStandards Policy andStrategy Committee on
2、 30September 2009 BSI 2009ISBN 978 0 580 59241 6Amendments/corrigenda issued since publicationDate CommentsBS EN 3475-515:2009National forewordThis British Standard is the UK implementation of EN 3475-515:2009.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, Aerospa
3、ce avionic electrical and fibre optictechnology.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a
4、 British Standard cannot confer immunityfrom legal obligations.BS EN 3475-515:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3475-515August 2009ICS 49.060English VersionAerospace series - Cable, electrical, aircraft use - Test methods- Part 515: Crush resistanceSrie arospatiale - Cbles lectri
5、ques usagearonautique - Mthodes dessais - Partie 515: Rsistance lcrasementLuft- und Raumfahrt - Elektrische Leitungen furLuftfahrtverwendung - Prufverfahren - Teil 515:QuerdruckfestigkeitThis European Standard was approved by CEN on 20 June 2009.CEN members are bound to comply with the CEN/CENELEC I
6、nternal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN me
7、mber.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members
8、 are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switz
9、erland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 347
10、5-515:2009: EBS EN 3475-515:2009EN 3475-515:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Preparation of specimens .4 4 Tests conditions 4 5 Apparatus .5 6 Method 5 BS EN 3475-515:2009EN 3475-515:2009 (E) 3 Foreword This document (EN 3475-515:2009) has been prepared by the
11、 Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD,
12、 prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2010, and conflicting national standards shall be withdrawn at the latest by February 2010. Attention is
13、 drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the fol
14、lowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sl
15、ovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3475-515:2009EN 3475-515:2009 (E) 4 1 Scope This standard specifies a method to determine the ability of an electrical cable to withstand crushing under specified environmental conditions (e.i. during maintenance operations). It shall
16、be used together with EN 3475-100. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
17、applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General. EN 3475-201, Aerospace series Cables, electrical, aircraft use Test methods Part 201: Visual examination. EN 3475-805, Aerospace series Cables, electrical, aircraft use Test methods Part 805: Char
18、acteristic impedance. EN 3475-806, Aerospace series Cables, electrical, aircraft use Test methods Part 806: Attenuation. EN 3475-812, Aerospace series Cables, electrical, aircraft use Test methods Part 812: Return loss (VSWR). 3 Preparation of specimens Connectors shall be fitted on each end of the
19、test specimens (coaxial cables) to be connected to the measuring device. Length of specimens: 2 m, unless otherwise defined in product standard. 4 Tests conditions Unless otherwise specified in the product standard, the following test conditions shall be applied: Temperature at which test is carried
20、 out = 20 C; Number of specimens: 3. The following requirements shall be specified in the product standard: The frequency band of the measurements (DC up to the maximum frequency of the standard if not specified otherwise); The compressive force to be applied; The duration of the application of the
21、load. BS EN 3475-515:2009EN 3475-515:2009 (E) 5 5 Apparatus The apparatus shall allow a sample to be crushed between a flat steel base plate and a movable steel plate which applies gradually, by any convenient method, the crushing force uniformly over a 100 mm length of the sample. The plates shall
22、be suitably radiused to prevent sharp edges digging into the specimen. Suitable apparatus is shown in Figure 1. Dimensions in millimetres Top view End view Key 1 Guide 2 Load 3 Specimen R = minimum bend radius as defined in the product standard of the cable under test. Figure 1 Test methods 6 Method
23、 6.1 Measurements Measurements, at specified frequency band, shall be performed according to their specific test standards, for: EN 3475-805: Characteristic impedance; EN 3475-806: Attenuation; EN 3475-812: Return loss. 6.2 Test procedure Place the specimen in the test fixture. Step 1 : With no load
24、 applied, obtain the initial measurement for each test. Step 2 : The load shall be applied at a constant rate of loading as specified in the product standard until the required applied load is obtained. Step 3 : The load shall be maintained for the specified period. 100 BS EN 3475-515:2009EN 3475-51
25、5:2009 (E) 6 Step 4 : Remove the load. Step 5 : When the load has been fully removed allow the specimen to recover for 15 min. The variation of the return loss (EN 3475-812), shall be monitored continuously throughout the test. 6.3 Final measurements Step 1 : the following tests should be carried ou
26、t: EN 3475-201: Visual examination EN 3475-805: Characteristic impedance; EN 3475-806: Attenuation; EN 3475-812: Return loss. 6.4 Requirements Characteristic impedance, attenuation and return loss, before (step 1) and after (step 5) test shall be within the requirements of the product standard. The
27、return loss values during the test (step 3 and step 4) shall be recorded. BS EN 3475-515:2009This page has been intentionally left blank BS EN3475-515:2009BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is th
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