1、BS EN 3745-517:2017Aerospace series Fibres and cables, optical, aircraft use T e s t m e t h o d sPart 517: Cable tie clamping testBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 3745-517:2017 BRITISH STANDARDNational forewordThis British Standard is the UK imp
2、lementation of EN 3745-517:2017. It supersedes BS EN 3745-517:2012 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.A list of organizations represented on this committee can be obtained on r
3、equest to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 94213 6 ICS 49.090 Compliance with a Britis
4、h Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 3745-517:2017EUROPEAN STANDARD NORME EUROPE
5、NNE EUROPISCHE NORM EN 3745-517 March 2017 ICS 49.090 Supersedes EN 3745-517:2012English Version Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 517: Cable tie clamping test Srie arospatiale - Fibres et cbles optiques usage aronautique - Mthodes dessais - Partie 517
6、: Essai de serrage par colliers de frettage Luft- und Raumfahrt - Faseroptische Leitungen fr Luftfahrzeuge - Prfverfahren - Teil 517: Klemmprfung mit Kabelbindern This European Standard was approved by CEN on 29 July 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whi
7、ch 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 CEN-CENELEC Management Centre or to any CEN member. This Eu
8、ropean Standard exists in three official versions (English, French, 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
9、are the national standards bodies of 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, Netherlands, Norway, Poland, Portugal,
10、Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any
11、 form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3745-517:2017 EBS EN 3745-517:2017EN 3745-517:2017 (E) 2 Contents Page European foreword 3 1 Scope 4 2 Normative references 4 3 Preparation of specimens 4 4 Apparatus. 5 5 Method 6 BS EN 3745-517:2017EN 3745-517:2017 (E)
12、 3 European foreword This document (EN 3745-517:2017) has been prepared 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 N
13、ational Associations and the Official Services of the member countries 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 September 2017, and conflicting nat
14、ional standards shall be withdrawn at the latest by September 2017. Attention 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. This document supe
15、rsedes EN 3745-517:2012. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic
16、of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 3745-517:2017EN 3745-517:2017 (E) 4 1 Scope This
17、 European Standard specifies a method of determining the attenuation variation of an optical cable when clamped to a mandrel with cable ties, simulating the condition in an installed harness. 2 Normative references The following documents, in whole or in part, are normatively referenced in this docu
18、ment 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 connection Test methods Par
19、t 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, optical, aircraft use Test methods Part 301: Attenuation EN 4056-003, Aerospace series Cable ties for harnesses Part 003: P
20、lastic cable ties, operating temperatures 65 C to 105 C and 65 C to 150 C Product standard 3 Preparation of specimens 3.1 The fibre ends shall conform to the fibre end preparation criteria specified in EN 2591-100. 3.2 The length of fibre to be tested shall be in accordance with the applicable produ
21、ct standard. 3.3 The specimens shall be subjected to standard test conditions and stabilized at these conditions for 24 h as defined in EN 2591-100. 3.4 The following details shall be specified if not already included in the product standard. Minimum number of cable ties, 6. Spacing between the cabl
22、e ties shall be defined. If not the distance shall be 150 mm. Setting of the cable tie fitting tool. Mandrel diameter. Number of specimens (minimum 3) The wavelengths to be measured if not 1300 nm and 850 nm. BS EN 3745-517:2017EN 3745-517:2017 (E) 5 4 Apparatus A Light Launch System (LLS) and Light
23、 Detection System (LDS) as defined in EN 2591-100. A mandrel with a diameter specified in the applicable product standard. A typical arrangement is shown in Figure 1. Key 1 Fibre optic cable 2 Cable tie 3 Mandrel Figure 1 Cross sectional view Key 1 Mandrel 2 Fibre optic cable 3 Head of cable tie sha
24、ll be positioned on the mandrel Figure 2 BS EN 3745-517:2017EN 3745-517:2017 (E) 6 5 Method 5.1 Procedure a) Measure and record the optical transmittance of the specimen for both wavelengths 850 nm and 1300 nm while the specimen is aligned on the test mandrel to establish a reference measurement. b)
25、 Apply the specified number of cable tie type EN 4056-003 type 1, size code S or equivalent to the cable sample under test and mandrel, as shown in Figure 2. The cable ties are to be positioned at distance specified in the product standard or at 150 mm if not specified. c) Using the applicable fitti
26、ng tool specified in MS 90387 for the size of cable tie being used, tighten the cable tie to the required tension as detailed in the product standard. The head of the cable tie shall be located according to Figure 2. d) Leave the assembly to stand for 15 minutes (to allow the cable tie to relax) the
27、n measure and record the final optical transmittance of the specimen at both wavelengths 850 nm and 1300 nm. e) After completing section d), remove the cable ties and measure the final optical transmittance of the specimen at both wavelengths 850 nm and 1300 nm when the specimen is removed from the
28、test fixture. 5.2 Final measurements and requirements Measure the initial and residual attenuation variation using EN 3745-301, method C. Starting with a reference measurement before setting up the test assembly. After the period of test remove the specimen from the test fixture and take a second me
29、asurement within one minute. Take a final reading after 1 h to determine residual attenuation, if any. Perform a visual examination according to EN 3745-201. This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications
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