1、BRITISH STANDARD AEROSPACE SERIES Cables, electrical, aircraft use Test methods Part 404: Thermal shock The European Standard EN 3475-404:2002 has the status of a British Standard ICs 49.060 BS EN 3475404:2002 BS EN 3475-40412002 Amd. No. National foreword Date Comments This British Standard, having
2、 been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 05 February 2002 This British Standard is the official English language version of The UKparticipation in its preparation wa
3、s entrusted by Technical Committee ACE/6, Aerospace, avionic, electrical and fibre optic technology, to Subcommittee ACE/6/2, Aerospace - Cables, which has the responsibility to: EN 3475-40412002. - - aid enquirers to understand the text; present to the responsible European committee any enquiries o
4、n 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. Cr oss-r e fer enc e s The
5、 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 Catalogue. A B
6、ritish 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 comprises a f
7、ront cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 05 February 2002 ISBN O 580 38364 4 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 347
8、5-404 January 2002 ICs 49.060 English version Aerospace series - Cables, electrical, aircraft use - Test methods - Part 404: Thermal shock Srie arospatiale - Cbles lectriques usage aronautique - Mthodes dessai - Partie 404: Chocs thermiques Luft- und Raumfahrt - Elektrische Leitungen fr Luftfahrt, V
9、erwendung - Prfverfahren -Teil 404: Thermischer Schock This European Standard was approved by CEN on 6 August 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any a
10、lteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tran
11、slation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I
12、taly, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2002 CEN All rights of exploitation in
13、any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3475-404:2002 E EN 3475-404:2002 (E) Foreword This document (EN 3475-404:2002) has been prepared by the European Association of Aerospace Manufacturers (AECMA). After enquiries and votes carried out in accordance with
14、 the rules of this Association, this Standard has received the approval of the National 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 ident
15、ical text or by endorsement, at the latest by July 2002, and conflicting national standards shall be withdrawn at the latest by July 2002. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard :
16、 Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 2 EN 3475-404:2002 (E) 1 Scope This standard specifies a method of evaluating the performance of
17、 a cable after exposure to a thermal shock. It shall be used together with EN 3475-100. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publ
18、ications 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 publication referred to applies. EN 3475-100
19、 Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100: General 3 Preparation of a specimen 3.1 Insulated conductor A specimen 1,5 m long shall be carefully prepared by stripping a length of 25 mm at each end. For the purpose of this test all the layers of material covering t
20、he conductor shall be removed. The insulation shall be cut perpendicular to the cable axis with a razor blade or equivalent tool to facilitate the stripping operation. The length of conductor exposed at each end shall be measured. 3.2 Cable jacket A specimen of cable 1,5 m long, shall be prepared by
21、 carefully removing 25 mm of jacket from each end of the cable. A razor blade or equivalent, held perpendicular to the axis of the cable, shall be used to cut the jacket for the removal operation. The length of exposed cores at each end of the specimen shall be measured. 4 Apparatus A support for th
22、e coiled cable and an oven shall be required for this test. 5 Method 5.1 The specimen shall be wound in a spiral of minimum diameter 0,3 m then arranged on a support for handling during the test. The specimen shall be placed in an oven for 30 min at the temperature stated in the product standard. Th
23、en the specimen shall be removed from the oven within 2 min and stored for 30 min at (- 55 f 2) OC. After this cycle the specimen shall be brought back to ambient temperature, for a minimum of 30 min. This cycle and the measurements are repeated three times making a total of four cycles. Remove the
24、specimen from the support and straighten it. Procedure (applicable for insulated conductors and jacketed cables) 3 EN 3475-404:2002 (E) 5.2 On completion of each cycle, the following measurements shall be made: distance between the insulation and the end of the conductor (for insulated conductor) or
25、 between the jacket and the core(s) shall be measured at each end. Any variation from the original measurement greater than the value stated in the product standard shall be considered a failure. Any flaring of any layer shall also constitute a failure. Req u i remen ts 4 BS EN 3475-40412002 BSI 389
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