1、BRITISH STANDARD AEROSPACE SERIES BS EN 3841-307:2004 Circuit breakers Test methods Part 307: Performance with a locked tripping system The European Standard EN 3841-307:2004 has the status of a British Standard ICS 49.060 BS EN 3841-307:2004 This British Standard was published under the authority o
2、f the Standards Policy and Strategy Committee on 21 February 2005 BSI 21 February 2005 ISBN 0 580 45530 0 National foreword This British Standard is the official English language version of EN 3841-307:2004. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospac
3、e avionic electrical 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 E
4、uropean publications 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 includ
5、e all the necessary 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 enquiri
6、es on the interpretation, 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 6, an inside back
7、 cover and a back 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 EN3841307 December2004 ICS49.060 Englishversion AerospaceseriesCircuitbre
8、akersTestmethodsPart307: Performancewithalockedtrippingsystem SriearospatialeDisjoncteursMthodesdessais Partie307:Comportementavecmcanismebloqu LuftundRaumfahrtSchutzschalterPrfverfahrenTeil 307:VerhaltenmitblockiertemAuslsesystem ThisEuropeanStandardwasapprovedbyCENon10September2004. CENmembersareb
9、oundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. Thi
10、sEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,C
11、yprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISC
12、HESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3841307:2004:EEN 3841-307:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Method 4 3.1 General conditions
13、4 3.2 Test mounting 4 3.3 Test circuit4 3.4 Procedure .6 3.5 Requirement.6 EN 3841-307:2004 (E) 3 Foreword This document (EN 3841-307:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance wit
14、h the rules of this Association, this Standard has received the approval of the National Associations 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 ide
15、ntical text or by endorsement, at the latest by June 2005, and conflicting national standards shall 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 Standar
16、d: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 3841-307:2004 (E) 4 1
17、Scope This standard specifies a method of verifying the performance of circuit breakers with a locked tripping system. It shall be used together with EN 3841-100. The test is intended to estimate the consequences of a trip failure in the case of a short-circuit. 2 Normative references The following
18、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. EN 3841-100, Aerospace series Circuit breakers Test methods Par
19、t 100: General 3 Method 3.1 General conditions The mechanism shall be locked in order to simulate a welding of the power contacts with no direct action on the bimetal. For three-pole circuit breakers, only one pole shall be tested, other circuits shall be unloaded. 3.2 Test mounting The circuit brea
20、kers shall be mounted as specified in EN 3841-100, in connection with the applicable technical specification. 3.3 Test circuit According to Figure 1 with d.c. and a.c., single-pole. According to Figure 2 with a.c., three-pole. EN 3841-307:2004 (E) 5L1, L2, L3 : a.c. phases N : neutral P1 : test spec
21、imen (circuit breaker) Ug : voltage at circuit breakers terminals U k: test chamber (for explosion proofness) F1, F2 : fuses 0,1 A S1 : main switch L : inductance R : loading resistor W or M : converter or shunt for current measurement Where Figure 1 Figure 2 EN 3841-307:2004 (E) 6 3.4 Procedure The
22、 circuit breakers at no load shall be placed in an oven for 2 h at 90 C. Afterwards the circuit breakers shall be tested within 5 min after being removed from the oven. The circuit breakers poles shall carry the test currents under the test voltage specified in the technical specification until circ
23、uit interruption occurs. 3.5 Requirement Circuit opening by destruction of circuit breakers without bursting, flaming or thick smoke, in accordance with the maximum duration specified in technical specification. blankBS EN 3841-307:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards
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