1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-311:1998 Elements of electrical and optical connection Test methods Part 311: Low air pressure The European Standard EN2591-311:1997 has the status of a British Standard ICS 49.060BSEN2591-311:1998 This British Standard, having been prepared under the dir
2、ection of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 January 1998 BSI 05-1999 ISBN 0 580 29485 4 National foreword This British Standard is the English language version of EN 2591-311:1997. The UK participation in its preparatio
3、n was entrusted by Technical Committee ACE/6, Aerospace avionic, electrical and fibre optic technology, to Subcommittee ACE/6/3, Aerospace connectors, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on t
4、he interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is d
5、rawn to the fact that CEN and CENELEC Standards normally incude an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards
6、 Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for t
7、heir correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 and 3 and a back cover. This standard has been updated (see
8、 copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN2591-311:1998 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 2591-
9、311 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-311 October 1997 ICS49.060 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, test. English version Aerospace series Elements of electrical and optical connection Test methods Part 311: Low air pressure Sri
10、e arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 311: Basse pression atmosphrique Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 311: Niedriger Luftdruck This European Standard was approved by CEN on 22 June 1997. CEN members are boun
11、d to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Ce
12、ntral Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status a
13、s the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standard
14、ization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-311:1997 EEN2591-311:1997 BSI05-1999 2 Forewor
15、d This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries 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 mem
16、ber 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 April 1998, and conflicting national standards shall be withdrawn at the latest by April 1
17、998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
18、 Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Preparation of specimens 3 4 Apparatus 3 5 Method 3 Table 1 3EN 2591-311:1997 BSI05-1999 3 1 Scope This standard specifies a method of assessing the ability of elements of conn
19、ection to operate at low air pressure. It shall be used together with EN2591. This method forms part of test EN2591-302. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriat
20、e places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication
21、 referred to applies. EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. EN 2591-207, Aerospace series Elements of electrical and optical connection Test methods Part 207: Voltage proof test. EN 2591-302, Aerospace series Elements of electrical and optical
22、connection Test methods Part 302: Climatic sequence 1) . 3 Preparation of specimens 3.1 Specimens shall be prepared according to the technical specification. Unless otherwise specified,50% of cables shall be of the minimum diameter,50% of the maximum diameter, evenly distributed. 3.2 Unless specifie
23、d in the technical specification, the following details shall be stated: specimen mated or unmated and fitted with protective cover (if applicable); mounting method, type of cable and definition of specimen wiring; preconditioning and initial measurements (if applicable); method according to EN2591-
24、207 and voltage value. 4 Apparatus The test chamber shall have provisions for sealing of electrical cables going in and out of the chamber. The volume of the chamber shall not exceed1m 3 . 5 Method 5.1 Preconditioning and initial measurements (if applicable) They shall be carried out as specified. 5
25、.2 Severity It shall be selected from the values listed inTable 1. Table 1 5.3 Procedure 5.3.1 The chamber pressure shall be reduced from ambient to the specified value within5min to15min and maintained for30min. 5.3.2 Intermediate measurements and requirements The test EN2591-207 shall be carried o
26、ut using the specified method and voltage value. 5.3.3 The chamber pressure shall then be returned to the ambient pressure level within1min. 1) Published as AECMA Prestandard at the date of publication of this standard Altitude Corresponding pressure m kPa mbar 15000 21000 30000 12,1 4,7 1,1 121 47
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