1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-209:1996 Elements of electrical and optical connection Testmethods Part 209: Current temperature derating The European Standard EN 2591-209:1996 has the status of a British Standard ICS 49.060BSEN2591-209:1996 This British Standard, having been prepared u
2、nder the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15June1996 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment 92/84576 DC ISBN 0 580 25959 5 Commit
3、tees responsible for this BritishStandard 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 Confederation British Rubber
4、 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 CommentsBSEN2591-209:1996 BSI 01-2000 i Contents Page Committees responsibl
5、e 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 Figure 3 4 Figure 4 5 Figure 5 5 List of references Inside back coverBSEN2591-209:1996 ii BSI 01-2000 National foreword This British Sta
6、ndard has been prepared by Technical Committee ACE/6 and is the English language version of EN2591-209:1996 Aerospace series Elements of electrical and optical connection Test methods Part 209: Current temperature derating, published by the European Committee for Standardization (CEN). It supersedes
7、 BS EN2591-B9:1994 which is withdrawn. BS EN2591-209:1996 was produced as a result of international discussions in which the UnitedKingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for th
8、eir correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard IEC (50) 302 BS4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour
9、terms Part 1 Terms common to power, telecommunications and electronics Group 04:1986 Elements of electrical and optical connection. Test methods. General EN 2591 BS EN2591:1992 Elements of electrical and optical connection. Test methods. General Summary of pages This document comprises a front cover
10、, an inside front cover, pages i and ii, theEN title page, pages2 to 6, 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 amendment table on the inside front cover.EUROPEAN STANDARD NORME
11、 EUROPENNE EUROPISCHE NORM EN 2591-209 February 1996 ICS 49.060 Supersedes EN 2591-B9:1993 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, tests, temperature rise, electric current strength, variation curves English version Aerospace series Elements of electrical and optica
12、l connection Test methods Part 209: Current temperature derating Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 209: Taux de rduction de lintensit en fonction de lchauffement d au courant Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren
13、 Teil 209: Bestimmung der Strom-Temperatur-Belastungsminderung This European Standard was approved by CEN on1993-12-16. 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
14、 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, German). A version in any other language made
15、 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
16、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 Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. E
17、N 2591-209:1996 EEN2591-209:1996 BSI 01-2000 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 abandoned for a numerical designation in line with the Internal Regulations
18、of CEN/CENELEC. This European Standard is the integral reproduction of the European Standard EN2591-B9 after application of this decision, without any other modification than the change in numbering. This European Standard shall be given the status of a national standard, either by publication of an
19、 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 organizations of the following countries are bound to implement this European S
20、tandard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.EN2591-209:1996 BSI 01-2000 3 1 Scope This standard specifies a method for establishing current-temperature derating
21、curves 1)for elements of connection depending on the various contact arrangements. 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 cited at the appropria
22、te 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 publicatio
23、n referred to applies. IEC 50(302), International electrotechnical vocabulary Chapter 302:Electrical measuring instruments. EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. 3 Preparation of specimens 3.1 Specimens shall be wired, contacts connected in ser
24、ies and mated. The cross-section and the type of wires connecting the contacts together shall be appropriate to the expected test current and temperature. The length of wire between two contacts shall be between250mm and300mm. The length of the supply cable shall be appropriate to the test set-up. T
25、he freely hanging specimen shall be fitted with temperature sensors. 3.2 Unless indicated in the technical specification, the following details shall be specified: cross section and type of wires; points for measurement of the specimen temperature; maximum operating temperature (T max. ); number of
26、specimens; housing (shell) size and contact arrangement. 4 Apparatus The class of apparatus to be used shall be at least equal to0,5 see IEC50(302). A regulated power supply shall be capable of delivering the specified current to 1% during the whole test. 5 Method The test shall be performed with: d
27、irect current or alternating current r.m.s., 40Hz to 60Hz. The sensors used shall not affect the temperature rise in the specimen or lead to errors in measurement. During the test, the specimen shall be protected from draughts by four non-heat-reflecting screens which shall not affect the temperatur
28、e rise. They shall be so installed as to allow a250mm to300mm clearance around the specimen. The ambient temperature (T u ) shall be measured in the vicinity of the test set-up outside the screens. After the current has been maintained for one hourat each current value (I 1 , I 2 , I 3 . I N ) the t
29、emperature of the specimen (T 1 , T 2 , T 3 . T N ), which shall be T max.and the ambient temperature T u , shall be recorded. The temperature of the specimen may be recorded after less than one hour if it has stabilised. The current curve shall be plotted as follows: a) Plot along the X-axis the ma
30、ximum operating temperature of the specimen (T max. ) (Figure 1). b) Plot along Y-axis the test currents I 1 , I 2 , I 3 , (Figure 2). c) Starting from the maximum operating temperature (T max. ) plot the temperature rises calculated (%T 1 , %T 2 , %T 3 ) for each test current I 1 , I 2 , I 3(Figure
31、 3). %T = T max. T u d) Connect the points of intersection (1, 2, 3) of the current curve which ends at T max.along the X-axis (Figure 4). This curve is the basic curve for plotting the current derating curve. The current derating curve is obtained by reducing the current value of the basic curve to
32、0,8I (generally agreed experimental coefficient) (Figure 5). In no case shall the rated current for the contact or the cable be exceeded. 1) These curves can only give mean values, considering the high number of factors involved.EN2591-209:1996 4 BSI 01-2000 Figure 1 Figure 2 Figure 3 EN2591-209:199
33、6 BSI 01-2000 5 Figure 4 Figure 5 6 blankBSEN2591-209:1996 BSI 01-2000 List of references See national foreword.BS EN 2591-209:1996 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the
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