1、BRITISH STANDARD AEROSPACE SERIES BS EN 3841-508:2004 Circuit breakers Test methods Part 508: Centrifugal acceleration The European Standard EN 3841-508:2004 has the status of a British Standard ICS 49.060 BS EN 3841-508:2004 This British Standard was published under the authority of the Standards P
2、olicy and Strategy Committee on 22 February 2005 BSI 22 February 2005 ISBN 0 580 45544 0 National foreword This British Standard is the official English language version of EN 3841-508:2004. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electri
3、cal and 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 publicati
4、ons referred 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 necessa
5、ry provisions 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 interpr
6、etation, 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
7、 cover. 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 EN3841508 December2004 ICS49.060 Englishversion AerospaceseriesCircuitbreakersTestmethodsP
8、art508: Centrifugalacceleration SriearospatialeDisjoncteursMthodesdessais Partie508:Acclrationcentrifuge LuftundRaumfahrtSchutzschalterPrfverfahrenTeil 508:Zentrifugalbeschleunigung ThisEuropeanStandardwasapprovedbyCENon10September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulations
9、whichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(En
10、glish,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,Franc
11、e, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassar
12、t,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3841508:2004:EEN 3841-508:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Method 4 3.1 Mounting.4 3.2 Procedure .4 4 Requirement.4 EN 3841-508:2004 (E) 3 F
13、oreword This document (EN 3841-508:2004) 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 Associatio
14、ns and the 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
15、 be withdrawn 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, Hu
16、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 3841-508:2004 (E) 4 1 Scope This standard specifies a method of verifying the capability of circuit breakers to withstand
17、 centrifugal acceleration. 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
18、document (including any amendments) applies. ISO 2669, Environmental tests for aircraft equipment Steady-state acceleration EN 3841-100, Aerospace series Circuit breakers Test methods Part 100: General 3 Method 3.1 Mounting The circuit breakers shall be mounted in the centrifuge on a rotating suppor
19、t according to 4.2 and 4.3 of EN 3841-100. The electrical connection shall be made with the cables of the section specified in EN 3841-100, Table 1. The connection cables shall be attached to the support approximately 100 mm from the terminals. The circuit breakers and the cables shall be mounted wi
20、th the torque indicated in the product standard. The circuit breakers shall be shielded from air flow by a screen. 3.2 Procedure The behaviour of the circuit breakers in steady-state acceleration shall be tested according to ISO 2669. The test shall be carried out for six planes of the main axis of
21、the circuit breakers. Two tests in each direction are required per circuit breaker: 1st test: 10 min in the open position; 2nd test: 10 min in the closed position, at 90 % of current rating. The acceleration value shall be specified in the technical specification. During the test, it shall be establ
22、ished that the contacts do not close for a period 10 s (circuit breakers in the open position) or open for a period 10 s (circuit breakers in the closed position). 4 Requirement Requirements in accordance with technical specification and product standard. blankBS EN 3841-508:2004 BSI 389 Chiswick Hi
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