1、BRITISH STANDARD AEROSPACE SERIES BS EN 3841-401:2004 Circuit breakers Test methods Part 401: Sand and dust The European Standard EN 3841-401:2004 has the status of a British Standard ICS 49.060 BS EN 3841-401:2004 This British Standard was published under the authority of the Standards Policy and S
2、trategy Committee on 22 February 2005 BSI 22 February 2005 ISBN 0 580 45532 7 National foreword This British Standard is the official English language version of EN 3841-401:2004. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fib
3、re 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 referre
4、d 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 provisio
5、ns 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, or
6、 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. The
7、 BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3841401 December2004 ICS49.060 Englishversion AerospaceseriesCircuitbreakersTestmethodsPart401: San
8、danddust SriearospatialeDisjoncteursMthodesdessais Partie401:Sableetpoussires LuftundRaumfahrtSchutzschalterPrfverfahrenTeil 401:SandundStaub ThisEuropeanStandardwasapprovedbyCENon10September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthis
9、Europe an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherl
10、anguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Irelan
11、d,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexp
12、loitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3841401:2004:E EN 3841-401:2004 (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 3841-401:2004 (E) 3 Foreword This document (EN 3841-401:20
13、04) 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 Official Services of the m
14、ember 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 withdrawn at the latest by June 2
15、005. 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, Iceland, Ireland, Italy, Latvi
16、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 3841-401:2004 (E) 4 1 Scope This standard specifies a method of verifying the ability of circuit breakers to withstand sand and dust. It shall be used togethe
17、r 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 (including any amendments) applies. ISO 71
18、37, Aircraft Environmental conditions and test procedures for airborne equipment EN 3841-100, Aerospace series Circuit breakers Test methods Part 100: General 3 Method 3.1 Mounting The circuit breakers shall be mounted on a support in the test chamber so that they are completely exposed to the air f
19、low. 3.2 Procedure The circuit breakers (at no load) shall be in the ON position for the first and in the OFF position for the second cycle. They shall be subjected to the sand and dust test according to test procedure 1.7 of ISO 7137. The test shall be carried out exposing all six surfaces of the c
20、ircuit breakers to the sand stream, except that the test duration is fixed for 2 h for each surface. 3.3 Requirement Requirements in accordance with technical specification and product standard. blankBS EN 3841-401:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI i
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