1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-314:1998 Elements of electrical and optical connection Test methods Part 314: Immersion at low air pressure The European Standard EN 2591-314:1997 has the status of a British Standard ICS 49.060BS EN2591-314:1998 This British Standard, having been prepare
2、d under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15 January 1998 BSI 04-1999 ISBN 0 580 29479 X National foreword This British Standard is the English language version of EN 2591-314:1997. The UK participation in its
3、 preparation 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 enq
4、uiries 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. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Att
5、ention is drawn to 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 international or European publications referred to in this documen
6、t may be found in the BSI Standards 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 Brit
7、ish Standards are responsible for their 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 to 4 and a back cover. T
8、his standard has been updated (see 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 CommentsBS EN2591-314:1998 BSI 04.1999 i Contents Page National foreword Inside fron
9、t cover Foreword 2 Text of EN 2591-314 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-314 October 1997 ICS 49.060 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, test English version Aerospace series Elements of electrical and optical connection Test met
10、hods Part 314: Immersion at low air pressure Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 314: Immersion basse pression dair Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 314: Tauchen bei Unterdruck This European Standard was
11、approved by CEN on 22 June 1997. CEN members are bound 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 nation
12、al standards may be obtained on application to the Central 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 not
13、ified to the Central Secretariat has the same status as 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 a
14、nd United Kingdom. CEN European Committee for Standardization 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.
15、EN 2591-314:1997 EEN2591-314:1997 BSI 04.1999 2 Foreword 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 Nat
16、ional 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 identical text or by endorsement, at the latest by April 1998, and conflicting nationa
17、l standards shall be withdrawn at the latest by April 1998. According to the CEN/CENELEC 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, I
18、celand, Ireland, Italy, Luxembourg, Netherlands, Norway, 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 Figure 1 Test cycle 4EN2591-314:1997 BSI 04.1999 3 1 Scope This stan
19、dard specifies a method of assessing the sealing ability of elements of connection immersed in salt water and exposed to low air pressure. It shall be used together with EN2591. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publication
20、s. 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 European Standard only when incorporated in it by amendment or revision. For
21、 undated references the latest edition of the publication referred to applies. EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. EN 2591-101, Aerospace series Elements of electrical and optical connection Test methods Part 101: Visual examination. EN 2591-
22、206, Aerospace series Elements of electrical and optical connection Test methods Part 206: Measurement of insulation resistance. EN 2591-207, Aerospace series Elements of electrical and optical connection Test methods Part 207: Voltage proof test. EN 2591-311, Aerospace series Elements of electrical
23、 and optical connection Test methods Part 311: Low air pressure 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. Unwir
24、ed cavities shall be fitted with filler plugs. A conductor shall be connected to the housing (shell) to allow measurements to be carried out. For specimens with an unprotected cable termination area (e.g. with solder contacts) a means of protection shall be used. 3.2 Unless specified in the technica
25、l specification, the following details shall be stated: specimens mated or unmated and fitted with protective cover; mounting method, type of cable and definition of specimen wiring; initial measurements and requirements (ifapplicable); method according to EN2591-206 and minimum insulation resistanc
26、e value; method according to EN2591-207 and voltage value; pressure value if different from that given in5.2.2.1; final measurements and requirements (if applicable). 4 Apparatus 4.1 Low air pressure chamber It shall be of sufficient size to house the container holding the specimen immersed in the s
27、alt solution. Its volume shall not exceed 1m 3 . The low air pressure chamber shall also be provided with a window for visual observation of the specimens. A vacuum pump shall be capable of maintaining the specified pressure. 4.2 Salt solution Salt solution shall be prepared by dissolving 5% by mass
28、 of sodium chloride in deionized water. 5 Method 5.1 Initial measurements and requirements (if applicable) The initial measurements shall be carried out as specified. 5.2 Test procedure 5.2.1 Immersion The specimens shall be fully immersed in the solution. The cables shall be taken out along the spe
29、cimen axis without any mechanical stress and arranged to project from the solution. Unsealed cable ends shall be located inside the chamber. 5.2.2 Low air pressure cycle 5.2.2.1 The chamber pressure shall be reduced from ambient to 2kPa, unless otherwise specified, within5min to 15min and maintained
30、 for(30)min. 5.2.2.2 The chamber pressure shall then be increased to ambient within 1min and maintained for(30 ) min. This constitutes one cycle (seeFigure 1). 1) Published as AECMA Prestandard at the date of publication of this standard +5 0 +5 0EN2591-314:1997 4 BSI 04.1999 5.2.2.3 Three cycles sh
31、all be carried out. The specimens shall remain in the salt solution during measurements. The container with the immersed specimens may be removed from the chamber between two cycles. 5.3 Final measurements and requirements After the third cycle, and while the specimens are still immersed, they shall
32、 be subjected to the following test sequence: EN 2591-206; EN 2591-207: the test voltage shall be applied for a minimum of5s. Specimens shall then be removed from the salt solution, drained, carefully unmated and be tested to EN2591-101 with particular attention to salt water ingress and the conditi
33、on of the seals. Figure 1 Test cycle5 blankBS EN 2591-314:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is
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