1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-204:1996 Elements of electrical and optical connection Test methods Part 204: Discontinuity of contacts in the microsecond range The European Standard EN 2591-204:1996 has the status of a British Standard ICS 49.060BSEN 2591-204:1996 This British Standard
2、, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15June1996 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment 92/84571 DC I
3、SBN 0 580 25954 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/6, Aerospace avionic, electrical and fibre-optic technology, upon which the following bodies were represented: British Airways British Cable Makers Con
4、federation British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division) Federation of the Electronics Industry Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBSEN 2591-204:1996 BSI 11-1999 i Contents
5、Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Preparation of specimens 3 4 Apparatus 3 5 Method 3 Figure 1 4 Figure 2 4 Table 1 3 List of references Inside back coverBSEN 2591-204:1996 ii BSI 11-1999 National foreword This British
6、 Standard has been prepared by Technical Committee ACE/6 and is the English language version of EN 2591-204:1996 Aerospace series Elements of electrical and optical connection Test methods Part 204: Discontinuity of contacts in the microsecond range, published by the European Committee for Standardi
7、zation (CEN). It supersedes BS EN2591-B4:1994 which is withdrawn. BS EN 2591-204:1996 was produced as a result of international discussions in which the UnitedKingdom took an active part. Cross-reference The British Standard corresponding to the European Standard referred to in the text is identical
8、 in number and title with that given in clause2. 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 oblig
9、ations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theENtitle page, pages2 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amend
10、ment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-204 February 1996 ICS 49.060 Supersedes EN 2591-B4:1993 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, tests, measurements, electrical resistance, contact resistance, tests durat
11、ion English version Aerospace series Elements of electrical and optical connection Test methods Part 204: Discontinuity of contacts in the microsecond range Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 204: Discontinuit des contacts dans la gamme des microseconde
12、s Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 204: Kontaktunterbrechung im Mikrosekundenbereich This European Standard was approved by CEN on 1993-12-16. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions fo
13、r 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 member. This European Standard exists in three official
14、 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 members are the national standards bodies of Austria, Belg
15、ium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stass
16、art 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 2591-204:1996 EEN 2591-204:1996 BSI 11-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). The alphanumerical designation of the Parts of EN2591 has been ab
17、andoned for a numerical designation in line with the Internal Regulations of CEN/CENELEC. This European Standard is the integral reproduction of the European Standard EN2591-B4 after application of this decision, without any other modification than the change in numbering. This European Standard sha
18、ll be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August1996, and conflicting national standards shall be withdrawn at the latest by August1996. According to the CEN/CENELEC Internal Regulations, the national standards organ
19、izations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.EN 2591-204:1996 BSI 11-1999 3 1 Scope This
20、 standard specifies a method for measuring the duration of discontinuity across a pair of mated contacts. It shall be used together with EN2591. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are
21、 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 undated references the latest ed
22、ition 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 They shall be fitted with their contacts wired in accordance with the technical specification and mated. 3.2 Unless indicated in
23、the technical specification, the following details shall be specified: maximum duration of discontinuity; method to be used (A or B); test duration; mechanical stresses; climatic stresses. 4 Apparatus Tests shall be carried out with an appropriate apparatus or measuring device (seeFigure 1 and Figur
24、e 2). 5 Method A d.c. current from10mA to100mA shall flow across every contact. The current shall be applied during the whole test and discontinuities, if any, shall be recorded. 5.1 Number of contacts to be measured per size SeeTable 1. Table 1 5.1.1 Method A All mated contacts (seeTable 1) shall b
25、e measured separately and simultaneously. Number of contacts of the same size in an element of connection:N Minimum percentage to be measured:% N k 5 100 5 130 10 a a The result shall, if necessary, be rounded up to the next full number.EN 2591-204:1996 4 BSI 11-1999 5.1.2 Method B All wired contact
26、s (seeTable 1) of the element of connection shall be measured in series. 5.2 Requirement During the test there shall not be any duration of discontinuity greater than or equal to that specified. Figure 1 Figure 2 BSEN 2591-204:1996 BSI 11-1999 List of references See national foreword.BS EN 2591-204:
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