BS EN 3475-303-2002 Aerospace series - Cables electrical aircraft use - Test methods - Insulation resistance《航空航天系列 航空器用电缆 试验方法 绝缘电阻》.pdf

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1、BRITISH STANDARD AEROSPACE SERIES BS EN 3475-303:2002 Cables, electrical, aircraft use Test methods Part 303: Insulation resistance The European Standard EN 3475-303:2002 has the status of a British Standard ICS 49.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 3475-

2、303:2002 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 11 February 2002 BSI 11 February 2002 ISBN 0 580 38370 9 National foreword This Britis

3、h Standard is the official English language version of EN 3475-303:2002. 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 o

4、f 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 “Internation

5、al 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 Britis

6、h 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 devel

7、opments 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 last issued. Amendments issu

8、ed since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3475303 January2002 ICS49.060 Englishversion AerospaceseriesCables,electrical,aircraftuseTest methodsPart303:Insulationresistance SriearospatialeCbleslectriquesusage aronautiqueMthodesdessaiPartie303:Rsistanc

9、e disolement LuftundRaumfahrtElektrischeLeitungenfrLuftfahrt, VerwendungPrfverfahrenTeil303: Isolationswiderstand ThisEuropeanStandardwasapprovedbyCENon5August2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofana

10、tionalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation underthe

11、responsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,

12、Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3475303:2002EEN3475303

13、:2002(E) 2 Foreword Thisdocument(EN3475303:2002)hasbeenpreparedbytheEuropeanAssociationofAerospace Manufacturers(AECMA). AfterenquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountriesof

14、AECMA,priortoitspresentationtoCEN ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyJuly2002,andconflictingnationalstandardsshallbewithdrawnatthe latestbyJuly2002. AccordingtotheCEN/CENELECInternalRegulations,thenationalsta

15、ndardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway, Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN3475303:2002(E) 3 1 Scope Thisstan

16、dardspecifiesamethodofmeasuringtheinsulationresistanceoffinishedcables. ItshallbeusedtogetherwithEN3475100. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublication

17、sarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN3475100 AerospaceseriesCables,electrical,aircraftuseTes

18、tmethodsPart100:General 3 Preparationofspecimens Thespecimens,ofatleast10mlength,shallbetakenfromfinishedcables. Thesolutionusedfortheimmersiontestshallhavethefollowingcomposition: sodiumchloride 30g; distilledwater 1000g; wettingagent 2g. 4 Immersiontest Thespecimensshallbeimmersedinthesolutiondefi

19、nedin3withtheirendsprotrudingatleast150mm. TheimmersedlengthLshallbeknownandshallexceed10m. Afteronehoursimmersionattesttemperature(20 2)Cand(95 2)C,avoltageofbetween200Vd.c. and500Vd.c.,shallbeappliedfor1minasshownbelow: insulatedconductor:betweensolutionandconductor; screenedandjacketedcables:betw

20、eensolutionandscreen. Theinsulationresistance,inM .kmcalculatedfromtheformula 000 1 RL whereRistheresistanceofL(m) shallbeatleastequalto: insulatedconductor:thevaluestatedinthetechnicalspecification; screenedandjacketedcables:thevalueshownforthejacketinthetechnicalspecification.EN3475303:2002(E) 4 5

21、 Drytest TheinsulationresistanceshallbemeasuredbetweeneachinsulatedconductoroflengthLandalltheothers connectedtogetherandtothescreenifpresent.Avoltageofbetween200Vd.c.and500Vd.c.,shallbe appliedfor1minatambienttemperature. TheinsulationresistanceinM .kmcalculatedfromtheformula 000 1 RL whereRisthere

22、sistanceoflength L(m),shallbeatleastequaltothevaluegiveninthetechnicalspecification.BS EN 3475-303:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in

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