1、BRITISH STANDARD AEROSPACE SERIES BS EN 3841-303:2004 Circuit breakers Test methods Part 303: Dielectric strength The European Standard EN 3841-303:2004 has the status of a British Standard ICS 49.060 BS EN 3841-303:2004 This British Standard was published under the authority of the Standards Policy
2、 and Strategy Committee on 22 February 2005 BSI 22 February 2005 ISBN 0 580 45526 2 National foreword This British Standard is the official English language version of EN 3841-303:2004. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical a
3、nd 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 r
4、eferred 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 pr
5、ovisions 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 European committee any enquiries on the interpretation, or proposa
6、ls 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 BSI cop
7、yright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3841303 December2004 ICS49.060 Englishversion AerospaceseriesCircuitbreakersTestmethodsPart303: Dielectrics
8、trength SriearospatialeDisjoncteursMthodesdessais Partie303:Rigiditdilectrique LuftundRaumfahrtSchutzschalterPrfverfahrenTeil 303:Spannungsfestigkeit ThisEuropeanStandardwasapprovedbyCENon10September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgi
9、vingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversionina
10、nyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Icelan
11、d,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrig
12、htsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3841303:2004:EEN 3841-303:2004 (E) 2 Contents Page 1 Scope 4 2 Normative references 4 3 Method 4 EN 3841-303:2004 (E) 3 Foreword This document (EN 3841-303:2004) has been prepared by the European Association of
13、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 member countries of AECMA, prior to its presentation t
14、o 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 2005. According to the CEN/CENELEC Internal Regulation
15、s, 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
16、 Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 3841-303:2004 (E) 4 1 Scope This standard specifies a method of verifying the dielectric strength of circuit breakers. It shall be used together with EN 3841-100. 2 Normative references The following referenced
17、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 Part 100: Gene
18、ral 3 Method 3.1 Procedure The tests shall be taken after stabilization at environmental conditions specified in EN 3841-100. The a.c. test voltage (50 Hz) shall be applied progressively with a maximum rate of increase of 250 V/s. Measurements shall be taken in the closed and open positions between
19、all the points as indicated below according to the values defined in the product standard. When these voltages have been reached, they shall be maintained for 1 min. The circuit breakers shall be monitored for leakage current and possible breakdown. Measuring points: Measurements shall be taken with
20、 the circuit breakers in the “on” setting (closed position): between the terminals of each individual pole and all other connections including signal contacts; between all connections including signal contacts and earth (mounting). Measurements shall be taken with the circuit breakers in the “off” s
21、etting (open position): between each connection and all other connections including signal contacts; between all connections including signal contacts and earth. 3.2 Requirement For all admissible temperatures at ground and max. altitude, the values recorded shall meet the requirements of the produc
22、t standard. There shall be no leakage current 1 mA, breakdown or defect. blankBS EN 3841-303:2004 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 view on standards in Europ
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