1、BRITISH STANDARD AEROSPACE SERIES BS EN 3475-801:2002 Cables, electrical, aircraft use Test methods Part 801: Capacitance per unit length The European Standard EN 3475-801:2002 has the status of a British Standard ICS 49.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN
2、 3475-801:2002 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 3 July 2002 BSI 3 July 2002 ISBN 0 580 39961 3 National foreword This British St
3、andard is the official English language version of EN 3475-801:2002. 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 orga
4、nizations 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 Sta
5、ndards 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 Stan
6、dard 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 international and Europe
7、an 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 last issued. Amendme
8、nts issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3475801 June2002 ICS49.060 Englishversion AerospaceseriesCables,electrical,aircraftuseTest methodsPart801:Capacitanceperunitlength SriearospatialeCbleslectriquesusage aronautiqueMthodesdessaisPartie80
9、1:Capacit linique LuftundRaumfahrtElektrischenLeitungenfrLuftfahrt VerwendungPrfverfahrenTeil801:Betriebskapazitt ThisEuropeanStandardwasapprovedbyCENon20January2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofa
10、nationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undert
11、heresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spai
12、n,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3475801:2002EEN34758
13、01:2002(E) 2 Foreword Thisdocument(EN3475801:2002)hasbeenpreparedbytheEuropeanAssociationofAerospace Manufacturers(AECMA). AfterenquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountrieso
14、f AECMA,priortoitspresentationtoCEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyDecember2002,andconflictingnationalstandardsshallbe withdrawnatthelatestbyDecember2002. AccordingtotheCEN/CENELECInternalRegulations,the
15、nationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway, Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdomEN3475801:2002(E) 3 1 Scop
16、e Thisstandardspecifiesamethodformeasuringthecapacitanceperunitlengthofacable. ItshallbeusedtogetherwithEN3475100. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepubl
17、icationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN3475100 AerospaceseriesCables,electrical,aircraf
18、tuseTestmethodsPart100:General 3 Preparationofspecimens Theseshallbestrippedandpreparedsoastogivethemeasurementsbetweenthedifferentpointsspecified in4. 4 Method Capacitanceperunitlengthshallbemeasuredonasampleofalengthofonemetreormore,atafrequency between800Hzand1000Hz,toanaccuracyof 1%. 4.1 Coaxial
19、structure Thecapacitanceshallbemeasuredbetweentheinnerandouterconductors. 4.2 Unscreenedpair Thecapacitanceshallbemeasuredbetweenthetwoconductors.EN3475801:2002(E) 4 4.3 Screenedpair Performthefollowingmeasurements: C a : Capacitancebetweenelement1and element2connectedtoscreening C b : Capacitancebe
20、tweenelement2and element1connectedtoscreening C c : Capacitancebetweenelement1and element2joinedandscreening Thesecapacitancesshallbeexpressedinpicofarads. Theeffectivecapacitanceperunitlengthofthepair,expressedinpicofaradspermetre,isobtainedfromthe formula: L C C C 4 ) ( 2 c b a - + where Listhelen
21、gthofthesampleexpressedinmetres. 4.4 Caseofamultipaircable Ifthepairsareindividuallyscreened,themethoddescribedin4.1shallbeusedforeachpair. Ifthepairshavenoindividualscreening,themethodin4.3shallbeused,connectingtothescreeningall wiresnotbelongingtothepairbeingtested. 5 Requirement Theeffectivecapac
22、itanceperunitlength,expressedinpicofaradspermetre,shallliebetweenthelimits indicatedintheproductstandard.BS EN 3475-801:2002 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
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