1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-312:1998 Elements of electrical and optical connection Test methods Part 312: Air leakage The European Standard EN 2591-312:1997 has the status of a British Standard ICS 49.060BSEN 2591-312:1998 This British Standard, having been prepared under the direct
2、ionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes into effect on 15 January 1998 BSI 04-1999 ISBN 0 580 29481 1 National foreword This British Standard is the English lanugage version of EN2591-312:1997. The UK participation in its preparation was e
3、ntrusted 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 the inte
4、rpretation, 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 drawn to
5、 the fact that CEN and CENELEC Standards normally include 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 Catal
6、ogue 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 their c
7、orrect 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 to 4 and a back cover. This standard has been updated (see copyri
8、ght 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 CommentsBSEN 2591-312:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 2591-312 3i
9、i blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN2591-312 October1997 ICS49.060 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, test English version Aerospace series Elements of electrical and optical connection Test methods Part 312: Air leakage Srie arospatiale
10、Organes de connexion lectrique et optique Mthodes dessais Partie 312: Etanchit lair Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 312: Luftdichtheit This European Standard was approved by CEN on 22 June 1997. CEN members are bound to comply with the CEN/CENELEC I
11、nternal 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 Central Secretariat or to any CEN me
12、mber. 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 as the official versions. CEN membe
13、rs 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 Standardization Comit Europen de Normalisa
14、tion 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 2591-312:1997 EEN 2591-312:1997 BSI 04-1999 2 Foreword This European Standard has bee
15、n 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 member countries of AECMA, prior to
16、 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 April1998, and conflicting national standards shall be withdrawn at the latest by April 1998. According to the CEN/CENELEC
17、 Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switze
18、rland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative reference 3 3 Preparation of specimens 3 4 Apparatus 3 5 Methods 4 Figure 1 Example of test apparatus 3EN 2591-312:1997 BSI 04-1999 3 1 Scope This standard specifies a method of checking air leakage of the seals at the inte
19、rfaces between: mounting panel and receptacle; housing (shell) and insulator; insulator and contacts; insulator and cables; receptacle and plug; of elements of connection subjected to an air pressure difference. It shall be used together with EN2591. 2 Normative reference This European Standard inco
20、rporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate 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 Euro
21、pean Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. 3 Preparation of specimens 3.1 Specimens shall be prepa
22、red according to the technical specification. Unless otherwise specified, 50% of cables shall be of the minimum diameter, 50% of the maximum diameter, evenly distributed. The receptacle shall be mounted on a test setup which allows pressure to be applied in either direction. 3.2 Unless specified in
23、the technical specification, the following details shall be stated: mounting method, type of cable and definition of wiring of specimen; preconditioning: temperature and duration (ifapplicable); applicable test methods (A, B or C); value of pressure difference; maximum limit of leakage rate for each
24、 method. 4 Apparatus The leakage rate shall be measured by means of an appropriate apparatus (seeFigure 1). Figure 1 Example of test apparatusEN2591-312:1997 4 BSI 04-1999 5 Methods 5.1 Preconditioning (if applicable) It shall be carried out as specified. 5.2 Procedure 5.2.1 Method A Leakage through
25、 sealed receptacles The ends of the cables shall be blanked off. The specified pressure difference shall be established between the two faces of the receptacle, for30min, in either direction in turn. The leakage rate shall be measured. NOTEIt shall be ensured that any possible leakages at the mounti
26、ng of the receptacle are not taken into account in the measurement. 5.2.2 Method B Leakage through and at the coupling of plugs and protective covers The ends of the cables shall be blanked off. The plug or protective cover shall be mated with the receptacle from which one central contact has been r
27、emoved. The specified pressure difference shall be established for30min between the two faces of the receptacle mounting panel in either direction in turn. The leakage rate shall be measured. NOTEIt shall be ensured that any possible leakages at the mounting of the receptacle are not taken into acco
28、unt in the measurement. 5.2.3 Method C Leakage of the mounting of receptacles Precautions shall be taken so that only the device for sealing the mounting of the receptacle is tested. The specified pressure difference shall be established for30min between the two faces of the receptacle mounting pane
29、l in either direction in turn. The leakage rate shall be measured. 5.3 Requirement The leakage rate measured shall not exceed the specified value.5 blankBS EN 2591-312:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for pr
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