1、BRITISH STANDARD AEROSPACE SERIESBS EN3745-513:2005Fibres and cables, optical, aircraft use Test methods Part 513: Crush resistanceThe European Standard EN 3745-513:2005 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g
2、54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3745-513:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48648 6National forewordThi
3、s British Standard is the official English language version of EN 3745-513:2005. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Subcommittee ACE/6/-/10, Aerospace Fibre optic systems and equipment, which
4、 has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the secti
5、on entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Com
6、pliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related i
7、nternational and European developments and promulgate them in the UK.Summary of pagesThis 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 notice displayed in this document indicates when the document wa
8、s last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3745-513November 2005ICS 49.060English VersionAerospace series - Fibres and cables, optical, aircraft use - Testmethods - Part 513: Crush resistanceSrie arospatiale - Fibres et cb
9、les optiques usagearonautique - Mthodes dessais - Partie 513 : Rsistance lcrasementLuft- und Raumfahrt - Faseroptische Leitungen frLuftfahrzeuge - Prfverfahren - Teil 513:QuerdruckfestigkeitThis European Standard was approved by CEN on 19 September 2005.CEN members are bound to comply with the CEN/C
10、ENELEC Internal 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 Central Secretariat or to any
11、CEN member.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 Central Secretariat has the same status as the officialversions.CEN mem
12、bers are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and Unit
13、ed Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3745-513:2005: E
14、2 Contents Foreword 3 1 Scope .4 2 Normative references .4 3 Preparation of specimens 4 4 Apparatus 4 5 Method .6 EN 3745-513:20053 Foreword This European Standard (EN 3745-513:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquir
15、ies and votes carried out in accordance with the rules of this Association, this Standard has re-ceived the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a nation
16、al standard, either by publication of an identical text or by endorsement, at the latest by May 2006, and conflicting national standards shall be withdrawn at the latest by May 2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
17、 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 following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
18、 Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3745-513:20054 1 Scope This standard specifies a method to d
19、etermine the ability of an optical fibre cable to withstand crushing under specified environmental conditions. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated referenc
20、es, the latest edition of the referenced document (including any amendments) applies. EN 2591-100, Aerospace series Elements of electrical and optical connection Test methods Part 100: General EN 3745-100, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 100: General1)EN 3
21、745-201, 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 3 Preparation of specimens 3.1 If not at standard test conditions, the specimens shal
22、l be subjected to standard test conditions and stabilized at these conditions for 24 h as defined in EN 3745-100. 3.2 The following details shall be specified if not already included in the product standard: temperatures at which test is to be carried out; humidity at which test is to be carried out
23、; number and length of specimens; the compressive force to be applied; diameter of mandrel if used; maximum permissible variation in attenuation during and after test; duration of application of the load. 4 Apparatus The apparatus shall allow a sample to be crushed between a flat steel base plate an
24、d a movable steel plate which applies the crushing force uniformly over a 100 mm length of the sample. The plates shall be suitably radiused to prevent sharp edges digging into the specimen. A mandrel can be used instead of the steel plate if 1) In preparation at the date of publication of this stan
25、dard. EN 3745-513:20055 required. Suitable apparatus is shown in Figure 1. The Light Launch System (LLS) and the Light Detector System (LDS) are defined in EN 2591-100. A suitable oven capable of temperature control 2 C, and if necessary, capable of controlling the relative humidity during the test.
26、 Dimensions in millimetres Side view End view Plate Mandrel Key 1 Guide 2 Load 3 Specimen 4 Mandrel Figure 1 Test methods EN 3745-513:20056 5 Method 5.1 Procedure The variation of attenuation (EN 3745-301, method C) shall be monitored continuously throughout the test. Connect the specimen to the LLS
27、 and the LDS. Place the specimen in the test fixture. With no load applied, obtain a reference power measurement on the LDS. The load shall then be applied gradually avoiding shock to the specimen. Maintain the load for the specified time. Take a power measurement on the LDS. Remove the load. When t
28、he load has been fully removed allow the specimen to recover for 15 min. Measure the final attenuation in accordance with EN 3745-301, method C. 5.2 Final measurements and requirements After removal of the load the following tests should be carried out: EN 3745-201: Visual examination; EN 3745-301:
29、Attenuation, method C, maximum change in attenuation shall be within that specified. EN 3745-513:2005blankBS EN 3745-513:2005BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view
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