1、BRITISH STANDARD AEROSPACE SERIES BS EN 3475-305:2002 Cables, electrical, aircraft use Test methods Part 305: Overload resistance The European Standard EN 3475-305:2002 has the status of a British Standard ICS 49.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 3475-30
2、5:2002 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 15 February 2002 BSI 15 February 2002 ISBN 0 580 38368 7 National foreword This British
3、Standard is the official English language version of EN 3475-305:2002. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace, avionic, electrical and fibre optic technology, to Subcommittee ACE/6/2, Aerospace Cables, which has the responsibility to: A list of
4、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 “International
5、 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 with a British
6、Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European develop
7、ments 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 and 3 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Am
8、d. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3475305 February2002 ICS49.060 Englishversion AerospaceseriesCables,electrical,aircraftuseTest methodsPart305:Overloadresistance SriearospatialeCbleslectriquesusage aronautiqueMthodesdessaisPartie305:Tenueaux surcharges LuftundRaum
9、fahrtElektrischeLeitungenfrLuftfahrt, VerwendungPrfverfahrenTeil305:berlastbarkeit ThisEuropeanStandardwasapprovedbyCENon5August2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalterat
10、ion.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoi
11、tsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKing
12、dom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3475305:2002EEN3475305:2002(E) 2 Foreword Thisdocumen
13、t(EN3475305:2002)hasbeenpreparedbytheEuropeanAssociationofAerospace Manufacturers(AECMA). AfterinquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountriesof AECMA,priortoitspresentationtoC
14、EN. ThisEuropeanStandardshallbegiventhestatusofanationalstandards,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyAugust2002,andconflictingnationalstandardsshallbewithdrawnat thelatestbyAugust2002. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthef
15、ollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway, Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN3475305:2002(E) 3 1 Scope Thisstandardspecifiesamethodofmea
16、suringtheresistancetooverloadoffinishedcables. ItshallbeusedtogetherwithEN3475100. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelisted hereafter.Ford
17、atedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN3475100 AerospaceseriesCables,electrical,aircraftuseTestmethodsPart100:General 3
18、 Preparationofspecimens Eachspecimenhaving0,75mto1musefullengthbetweenthesupports,shallbeinstalledhorizontallyin frontofascreenandlightlystretchedattheendstoavoidanyslackduringthetest. Thetestshallbecarriedoutatambienttemperatureinachamberwherethewholeunitshallbesheltered fromdraughts.Anextractionsh
19、allbeprovidedbutonlyoperatedaftercompletionofthetest. Toidentifytheappearanceofsmoke,ascreenwithblackandwhitehorizontalbandsoranyotherdevice shallbeused. 4 Method Thepurposeofthistestshallbetocheckthatthereisnosmokeemissionforanoverloadlevelbringingthe conductortoatemperatureT 1 ,andthatforanoverloa
20、dbringingtheconductortoatemperatureT 2 ,thereis neitherignitionnordisappearanceoftheinsulation.ThetemperaturesT 1 andT 2 shallbespecifiedinthe productstandard. Thetestshallbeperformedonsize0,60mm 2 only. Thetemperaturesshallbedeterminedbymeasuringthevariationofthevoltagedropinthecentralpartofthe cab
21、le(2/3oftheusefullengthmaximum)betweenthevoltageapplicationpoints. 20 U U = 20 R R =1 0,004( 20) Firstregulatethecurrenttoavalue I 1 ,whichraisesthetemperatureoftheconductortoT 1 ,foraperiodof 30min(temperaturedefinedintheproductstandard). Thecurrentshallthenbeincreasedtoasecondvalue I 2 for15min,br
22、ingingthetemperatureofthe conductortoT 2 (temperaturedefinedintheproductstandard). 5 Requirements AtT 1 : novisiblesmokeorsmellorappreciablechangeofcolour; AtT 2 : novisibledeteriorationoftheinsulation(peeling,cracking,strippingoftheconductor)no spontaneouscombustionandnovisiblesmoke.BS EN 3475-305:
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