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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-209:1996 Elements of electrical and optical connection Test methods Part 209: Current temperature derating The European Standard EN 2591-209:1996 has the status of a British Standard ICS 49.060 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:
2、01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-209:1996 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 June 1996 BSI 01-2000 The following BSI references r
3、elate to the work on this standard: Committee reference ACE/6 Draft for comment 92/84576 DC ISBN 0 580 25959 5 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 technolog
4、y, upon which the following bodies were represented: British Airways British Cable Makers Confederation British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division) Federation of the Electronics Industry Ministry of Defence Society of British Aerospace Companies Amendme
5、nts issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-209:1996 BSI 01-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative refere
6、nces3 3Preparation of specimens3 4Apparatus3 5Method3 Figure 14 Figure 24 Figure 34 Figure 45 Figure 55 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-209:1996 ii BSI 01-2000 National foreword
7、This British Standard has been prepared by Technical Committee ACE/6 and is the English language version of EN 2591-209:1996 Aerospace series Elements of electrical and optical connection Test methods Part 209: Current temperature derating, published by the European Committee for Standardization (CE
8、N). It supersedes BS EN 2591-B9:1994 which is withdrawn. BS EN 2591-209:1996 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards ar
9、e responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred toCorresponding British Standard IEC (50) 302BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, l
10、ighting and colour terms Part 1 Terms common to power, telecommunications and electronics Group 04:1986 Elements of electrical and optical connection. Test methods. General EN 2591BS EN 2591:1992 Elements of electrical and optical connection. Test methods. General Summary of pages This document comp
11、rises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 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. L
12、icensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-209 February 1996 ICS 49.060Supersedes EN 2591-B9:1993 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, tests,
13、temperature rise, electric current strength, variation curves English version Aerospace series Elements of electrical and optical connection Test methods Part 209: Current temperature derating Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 209: Taux de rduction de
14、lintensit en fonction de lchauffement d au courant Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 209: Bestimmung der Strom-Temperatur-Belastungsminderung This European Standard was approved by CEN on 1993-12-16. CEN members are bound to comply with the CEN/CENELE
15、C 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 national standards may be obtained on application to the Central Secretariat or to any CEN
16、 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 notified to the Central Secretariat has the same status as the official versions. CEN me
17、mbers are the national standards bodies of Austria, Belgium, 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 Normalisation Europis
18、ches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 2591-209:1996 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-209:1996 BSI 01-2000 2 Foreword This
19、European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). The alphanumerical designation of the Parts of EN 2591 has been abandoned for a numerical designation in line with the Internal Regulations of CEN/CENELEC. This European Standard is the integral repro
20、duction of the European Standard EN 2591-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 identical text or by endorsement, at the latest by August
21、1996, and conflicting national standards shall be withdrawn at the latest by August 1996. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germ
22、any, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-209:1996 BSI 01-20003 1 Scope This standard specifies a m
23、ethod for establishing current-temperature derating curves1) for elements of connection depending on the various contact arrangements. It shall be used together with EN 2591. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications.
24、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 un
25、dated references the latest edition of the publication 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.
26、1 Specimens shall be wired, contacts connected in series 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 between 250 mm and 300 mm. The length of th
27、e supply cable shall be appropriate to the test set-up. The 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 tempera
28、ture; maximum operating temperature (Tmax.); number of specimens; housing (shell) size and contact arrangement. 4 Apparatus The class of apparatus to be used shall be at least equal to 0,5 see IEC 50(302). A regulated power supply shall be capable of delivering the specified current to 1 % during th
29、e whole test. 5 Method The test shall be performed with: direct current or alternating current r.m.s., 40 Hz to 60 Hz. 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-h
30、eat-reflecting screens which shall not affect the temperature rise. They shall be so installed as to allow a 250 mm to 300 mm clearance around the specimen. The ambient temperature (Tu) shall be measured in the vicinity of the test set-up outside the screens. After the current has been maintained fo
31、r one hour at each current value (I1, I2, I3. . . IN) the temperature of the specimen (T1, T2, T3. . . TN), which shall be Tmax. and the ambient temperature Tu, shall be recorded. The temperature of the specimen may be recorded after less than one hour if it has stabilised. The current curve shall b
32、e plotted as follows: a) Plot along the X-axis the maximum operating temperature of the specimen (Tmax.) (Figure 1). b) Plot along Y-axis the test currents I1, I2, I3, (Figure 2). c) Starting from the maximum operating temperature (Tmax.) plot the temperature rises calculated (%T1, %T2, %T3) for eac
33、h test current I1, I2, I3 (Figure 3). %T = Tmax. Tu d) Connect the points of intersection (1, 2, 3) of the current curve which ends at Tmax. 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 curr
34、ent value of the basic curve to 0,8 I (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. Licensed Copy: sheffieldun sheffieldu
35、n, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-209:1996 4 BSI 01-2000 Figure 1 Figure 2 Figure 3 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-209:1996 BSI 01-20005 Figure 4 Figure 5 Licensed Copy: sh
36、effieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-209:1996 BSI 01-2000 List of references See national foreword. Licensed Copy: sheffi
37、eldun sheffieldun, na, Thu Nov 02 17:56:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-209:1996 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards
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