1、BRITISH STANDARD AEROSPACE SERIES BS EN 3841-405:2004 Circuit breakers Test methods Part 405: Fluid resistance The European Standard EN 3841-405:2004 has the status of a British Standard ICS 49.060 BS EN 3841-405:2004 This British Standard was published under the authority of the Standards Policy an
2、d Strategy Committee on 21 February 2005 BSI 21 February 2005 ISBN 0 580 45535 1 National foreword This British Standard is the official English language version of EN 3841-405:2004. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and
3、fibre optic technology, to Subcommittee ACE/6/5, Circuit breakers, which has the responsibility 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 refe
4、rred to in this document may be found in the BSI Catalogue under the section 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 provi
5、sions of a contract. Users are responsible for its correct application. Compliance 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,
6、 or proposals for change, and keep the UK interests informed; monitor related international 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.
7、The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3841405 December2004 ICS49.060 Englishversion AerospaceseriesCircuitbreakersTestmethodsPart405:
8、Fluidresistance SriearospatialeDisjoncteursMthodesdessais Partie405:Rsistanceauxfluides LuftundRaumfahrtSchutzschalterPrfverfahrenTeil 405:BestndigkeitgegenFlssigkeiten ThisEuropeanStandardwasapprovedbyCENon10September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulat
9、etheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,
10、German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Gr
11、eece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brus
12、sels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3841405:2004:E EN 3841-405:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Method 4 3.1 Mounting.4 3.2 Procedure .4 3.3 Requirement.4 EN 3841-405:2004 (E) 3 Foreword Th
13、is document (EN 3841-405:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the
14、 Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2005, and conflicting national standards shall be withdr
15、awn at the latest by June 2005. 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, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ice
16、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 3841-405:2004 (E) 4 1 Scope This standard specifies a method of verifying the circuit breakers ability to withstand fluids as defin
17、ed in EN 3909. It shall be used together with EN 3841-100. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (in
18、cluding any amendments) applies. EN 3841-100, Aerospace series Circuit breakers Test methods Part 100: General EN 3909, Aerospace series Test fluids for electric components and sub-assemblies 1)3 Method 3.1 Mounting The circuit breakers shall be submitted to the test in the closed position. 3.2 Proc
19、edure One circuit breaker shall be used for each fluid as defined in EN 3909 and wetted using a brush. The circuit breakers shall remain wet for 24 h at ambient temperature except for the fire extinguishing agent. 3.3 Requirement Manual verification of the mechanical function after wetting; then, af
20、ter the drying phase the tests in accordance with technical specification and product standard shall be carried out. The current rating marking shall still be legible. A change in colour and of the other markings is acceptable. 1) Published as AECMA Prestandard at the date of publication of this sta
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