1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 3745-516:2012Aerospace series Fibres andcables, optical, aircraft use Test methodsPart 516: Severe cable bend testCopyright European Committee for Standardization Provided
2、by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-516:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3745-516:2012.The UK participation in its preparation was entrusted to TechnicalCo
3、mmittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplicat
4、ion. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 77591 8ICS 49.090Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on
5、31 July 2012.Amendments issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-516:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE
6、NORM EN 3745-516 July 2012 ICS 49.090 English Version Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 516: Severe cable bend test Srie arospatiale - Fibres et cbles optiques usage aronautique - Mthodes dessais - Partie 516: Essai de courbure svre Luft- und Raumfahrt
7、 - Faseroptische Leitungen fr Luftfahrzeuge - Prfverfahren - Teil 516: Schwere Kabelbiegeprfung This European Standard was approved by CEN on 23 March 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the
8、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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French
9、, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, C
10、roatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey an
11、d United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3745-5
12、16:2012: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-516:2012EN 3745-516:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Preparation of spec
13、imens .44 Apparatus .45 Method 6Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-516:2012EN 3745-516:2012 (E) 3 Foreword This document (EN 3745-516:2012) has been prepa
14、red by the 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 countri
15、es of ASD, 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 January 2013, and conflicting national standards shall be withdrawn at the latest by January 2013. Atte
16、ntion is 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 organisations of
17、 the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Neth
18、erlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3
19、745-516:2012EN 3745-516:2012 (E) 4 1 Scope This European Standard specifies a method of checking the break resistance and attenuation variation recovery of an optical cable subjected to severe bending under load. 2 Normative references The following documents, in whole or in part, are normatively re
20、ferenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2591-100, Aerospace series Elements of electrical and optical connec
21、tion Test methods Part 100: General EN 3745-100, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 100: General EN 3745-201, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 201: Visual examination EN 3745-301, Aerospace series Fibres and cables,
22、optical, aircraft use Test methods Part 301: Attenuation 3 Preparation of specimens 3.1 If not yet at standard test conditions, the specimens shall be subjected to standard test conditions and stabilized at these conditions for 24 h as defined in EN 2591-100. Type and length of fibre or cable. Load
23、mass M to be applied to ensure contact between the cable and the edge of the metal bar. Radius(s) R of the bending edge. Number of turns N to rotate the cable 180 after each bend test. 4 Apparatus A Light Launch System (LLS) as defined in EN 2591-100. A Light Detection System (LDS) as defined in EN
24、2591-100. A flat metal bar with radius edge and loads required by the applicable product standard. A typical arrangement is shown in Figure 1. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license
25、from IHS-,-,-BS EN 3745-516:2012EN 3745-516:2012 (E) 5 Key 1 Extra restraining clamp (25,4 1,3) mm 2 Fibre optic cable 3 LLS 4 10 mm to 20 mm thick flat metal bar with radius edge R 5 Typical radius R = (127 25,4) m 6 Clamp 7 Load 8 LDS Figure 1 Copyright European Committee for Standardization Provi
26、ded by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-516:2012EN 3745-516:2012 (E) 6 5 Method 5.1 Procedure a) Connect the specimen to the LLS and LDS. b) Attach the load mass (M) to the specimen as specified in the applicable
27、product standard prior to mounting the specimen on the bend fixture. c) Zero the LDS to establish a reference measurement. d) Mount the specimen on the bend fixture and gently apply the load to the specimen. e) After one (1) minute, measure the attenuation variation (EN 3745-301, method C) to ensure
28、 no fibber breakage. f) Remove the load from the cable and rotate the cable 180. g) Repeat steps d) through f) for the number of rotations required by the applicable product standard. h) Straighten specimen and measure the attenuation variation after one (1) minute. 5.2 Final measurements and requir
29、ements Measure the residual attenuation variation (EN 3745-301, method C) after removing the specimen from the test fixture to ensure no fibber breakage. Perform a visual examination according to EN 3745-201. Copyright European Committee for Standardization Provided by IHS under license with CENNot
30、for ResaleNo reproduction or networking permitted without license from IHS-,-,-This page deliberately left blankCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BSI is the indepen
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