1、BRITISH STANDARD AEROSPACE SERIES BS EN 3745-508:2002 Fibres and cables, optical, aircraft use Test methods Part 508: Torsion The European Standard EN 3745-508:2002 has the status of a British Standard ICS 49.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 3745-508:20
2、02 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 25 June 2002 BSI 25 June 2002 ISBN 0 580 39901 X National foreword This British Standard is
3、the official English language version of EN 3745-508:2002. 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 has the responsibility
4、to: 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 publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled
5、“International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance w
6、ith 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 the UK interests informed; monitor related intern
7、ational and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was la
8、st issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3745508 June2002 ICS49.060 Englishversion AerospaceseriesFibresandcables,optical,aircraftuseTest methodsPart508:Torsion SriearospatialeFibresetcblesoptiquesusage aronautiqueMthodesde
9、ssaisPartie508:Torsion LuftundRaumfahrtFaseroptischeLeitungenfr LuftfahrzeugePrfverfahrenTeil508:Torsion ThisEuropeanStandardwasapprovedbyCENon1March2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstan
10、dardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibi
11、lityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Swi
12、tzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3745508:2002EEN3745508:2002(E) 2
13、 Foreword Thisdocument(EN3745508:2002)hasbeenpreparedbytheEuropeanAssociationofAerospace Manufacturers(AECMA). AfterenquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountriesof AECMA,prio
14、rtoitspresentationtoCEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyDecember2002,andconflictingnationalstandardsshallbe withdrawnatthelatestbyDecember2002. AccordingtotheCEN/CENELECInternalRegulations,thenationalstan
15、dardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway, Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN3745508:2002(E) 3 1 Scope Thisstand
16、ardspecifiesamethodofcheckingtheresistancetodamageundertorsionofanopticalcablefor aerospaceapplications. 2 Normativesreferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsa
17、relisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN2591100 AerospaceseriesElementsofelectricalandopticalconn
18、ectionTestmethods Part100:General 1) EN 3745100 AerospaceseriesFibresandcables,optical,aircraftuseTestmethods Part100:General 2) EN 3745201 AerospaceseriesFibresandcables,optical,aircraftuseTestmethods Part201:Visualexamination EN 3745301 AerospaceseriesFibresandcables,optical,aircraftuseTestmethods
19、 Part301:Att enuation EN 3745505 AerospaceseriesFibresandcables,optical,aircraftuseTestmethods Part505:Tensilestr ength 2) 3 Preparationofspecimens 3.1 ThespecimensshallbeterminatedwithaconnectingsystemallowingconnectiontotheLight LaunchSystem(LLS)andLightDetectionSystem(LDS)asdefinedinEN2591100. If
20、notyetatstandardtestconditions,thespecimensshallbesubjectedtostandardtestconditionsand stabilizedattheseconditionsfor24hasdefinedinEN3745100. 3.2 Unlessspecifiedinthetechnicalspecification,thefollowingdetailsshallbestated: typeandlengthofcable; numberofcyclesifnot100; loadtobeapplied; maximumpermiss
21、iblevariationofattenuation; maximumvalueofinsertionloss; minimumvalueofthepullingtestofthespecimenattheendofthetorsiontest; d i s t a n c e ( L)betweentherotatinggripandthefixedgrip. 1) PublishedasAECMAPrestandardatthedateofpublicationofthisstandard 2) Inpreparationatthedateofpublicationofthisstanda
22、rdEN3745508:2002(E) 4 4 Apparatus Theapparatusshallcomprise: aLightLaunchSystem(LLS)asdefinedinEN2591100; aLightDetectionSystem(LDS)asdefinedinEN2591100; atestsetupcapableofapplyingthetorsionloadrequiredbythetestspecification. Atypicalarrangementisshowninfigure1. Figure1 5 Method 5.1 Procedure Insta
23、llthecableinthetestequipment,atazeroangleoftorsion. ConnectthespecimentoLLSandLDS. ZerotheLDS. Unlessotherwisestatedintheproductstandard,thefollowingtestshallapply: thecableshallberotatedfirst360inonedirectionthenat720intheoppositedirection.Itshallthen bereturnedtothestartingposition(360inthefirstdi
24、rection).Thisdefinesonecycle; thenumberofcyclesshallbe100; thecyclicrateshallbe6cycles/min. Theattenuation(EN3745301,methodC)shallbemonitoredthroughoutthetest. 5.2 Finalmeasurementsandrequirements EN3745201 EN3745505BS EN 3745-508:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards I
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