1、BRITISH STANDARD AEROSPACE SERIES BS EN 3841-301:2004 Circuit breakers Test methods Part 301: Voltage drop The European Standard EN 3841-301:2004 has the status of a British Standard ICS 49.060 BS EN 3841-301:2004 This British Standard was published under the authority of the Standards Policy and St
2、rategy Committee on 22 February 2005 BSI 22 February 2005 ISBN 0 580 45524 6 National foreword This British Standard is the official English language version of EN 3841-301:2004. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibr
3、e 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 referred
4、 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 provision
5、s 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 5 and a back cover. The BSI copyright notice d
7、isplayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3841301 December2004 ICS49.060 Englishversion AerospaceseriesCircuitbreakersTestmethodsPart301: Voltagedrop Sriearospatial
8、eDisjoncteursMthodesdessais Partie301:Chutedetension LuftundRaumfahrtSchutzschalterPrfverfahrenTeil 301:Spannungsabfall ThisEuropeanStandardwasapprovedbyCENon10September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthes
9、tatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslat
10、ion undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuan
11、ia,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandb
12、yanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3841301:2004:EEN 3841-301:2004 (E) 2 Contents Page 1 Scope 4 2 Normative references 4 3 Method 4 EN 3841-301:2004 (E) 3 Foreword This document (EN 3841-301:2004) has been prepared by the European Association of Aerospace Manufacturers - Stan
13、dardization (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 to CEN. This European Standard
14、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 Regulations, the national standards orga
15、nizations 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, Poland, Portugal, Slovakia, S
16、lovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3841-301:2004 (E) 4 1 Scope This standard specifies a method of verifying the voltage drop of circuit breakers. It shall be used together with EN 3841-100. 2 Normative references The following referenced documents are indispensable for t
17、he 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: General 3 Method 3.1 Main contacts at
18、 rated current test 3.1.1 Procedure This measurement shall be carried out after the circuit breaker has carried its rated current for a minimum period of 30 min in order to achieve thermal stabilization. The voltage drop shall be measured between the input and output terminal of each pole. Six measu
19、rements, each interrupted by one manual break operation and one manual make operation, shall be carried out at each circuit breaker pole. 3.1.2 Requirement The mean value of the six individual measurements shall not exceed the value specified in the product standard. 3.2 Main contacts at low current
20、 test 3.2.1 Procedure Measurement of the voltage drop at low current shall be carried out on circuit breakers which have not been subjected to any previous electrical test. The circuit breakers shall be loaded with the low current (d.c. only) specified in the product standard. Measurements shall be
21、carried out following a 1 min stabilization period. The voltage drop shall be measured between the input and output terminal of each pole. Six measurements shall be carried out at each circuit breaker pole. Each measurement shall be interrupted by one manual break operation and one manual make opera
22、tion. With d.c. measurements the current direction shall be inverted after three measurements. 3.2.2 Requirement The mean value of the six individual measurements shall not exceed the value indicated in the product standard. EN 3841-301:2004 (E) 5 3.3 Signal contacts 3.3.1 Procedure The signal conta
23、cts shall be loaded with the currents and voltages indicated in the technical specification. After stabilization, the voltage drop shall be measured between input and output terminals. Six measurements shall be taken with each contact. With d.c. measurements, the current direction shall be inverted
24、after three measurements (when the signal contact is not polarized). Each measurement shall be interrupted by one manual break operation and one manual make operation. 3.3.2 Requirement The mean value of the six individual measurements shall not exceed the value indicated in the product standard. BS
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