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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 49.060 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01
2、:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-314:1998 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 January 1998 BSI 04-1999 ISBN 0 580 29479 X Nationa
3、l foreword This British Standard is the English language version of EN 2591-314:1997. The UK participation in its 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 responsibil
4、ity to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries 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
5、 organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention 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 publi
6、cations. The British Standards which implement international or European publications referred to in this document 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 Ca
7、talogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British 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 c
8、omprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4 and a back cover. This 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 si
9、nce publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-314:1998 BSI 04.1999i Contents Page National forewordInside front cover Foreword2 Text of EN 2591-3143 Licensed Copy: sheffieldun sheffieldun, na
10、, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-314 October 1997 ICS 49.060 Descriptors: Aircraft industry, a
11、ircraft equipment, connecting equipment, test English version Aerospace series Elements of electrical and optical connection Test methods Part 314: Immersion at low air pressure Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 314: Immersion basse pression dair Luft-
12、 und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 314: Tauchen bei Unterdruck This European Standard was 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 Stan
13、dard 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 member. This European Standard exists in three official versions (English., French
14、, 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 members are the national standards bodies of Austria, Belgium, Czech Republic, Denma
15、rk, 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 Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B
16、-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-314:1997 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-314:1997 BSI 04.1999 2 Foreword
17、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 membe
18、r 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 199
19、8. 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
20、Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Preparation of specimens3 4Apparatus3 5Method3 Figure 1 Test cycle4 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-
21、314:1997 BSI 04.19993 1 Scope This standard 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 EN 2591. 2 Normative references This European Standard incorporates by dated or undated ref
22、erence 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 European Standard only when incorpor
23、ated 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. EN 2591-101, Aerospace series Elements of electrical and optical connection Test method
24、s Part 101: Visual examination. EN 2591-206, 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,
25、 Aerospace series Elements of electrical and optical connection Test methods Part 311: Low air pressure1). 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 max
26、imum diameter, evenly distributed. Unwired 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 us
27、ed. 3.2 Unless specified in the technical 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 (if applicable); method according to EN
28、 2591-206 and minimum insulation resistance value; method according to EN 2591-207 and voltage value; pressure value if different from that given in 5.2.2.1; final measurements and requirements (if applicable). 4 Apparatus 4.1 Low air pressure chamber It shall be of sufficient size to house the cont
29、ainer holding the specimen immersed in the salt solution. Its volume shall not exceed 1 m3. 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
30、 shall be prepared by dissolving 5 % by mass 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.
31、 The cables shall be taken out along the specimen 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 2 kPa, unless otherwise
32、specified, within 5 min to 15 min and maintained for (30) min. 5.2.2.2 The chamber pressure shall then be increased to ambient within 1 min and maintained for (30 ) min. This constitutes one cycle (see Figure 1). 1) Published as AECMA Prestandard at the date of publication of this standard + 5 0 + 5
33、 0 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-314:1997 4 BSI 04.1999 5.2.2.3 Three cycles shall be carried out. The specimens shall remain in the salt solution during measurements. The container with the immersed specimens may b
34、e 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 be subjected to the following test sequence: EN 2591-206; EN 2591-207: the test voltage shall be applied for a minimum of 5 s. Specimen
35、s shall then be removed from the salt solution, drained, carefully unmated and be tested to EN 2591-101 with particular attention to salt water ingress and the condition of the seals. Figure 1 Test cycle Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Cop
36、y, (c) BSI 5blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:01:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-314:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards
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