1、Cables, electrical, aircraft use Test methods Part 803 : Capacitance variation The European Standard EN 3475-803:2002 has the status of a British Standard ICs 49.060 BS EN 3475-803 12002 BS EN 3475-803:2002 National foreword This British Standard is the official English language version of The UKpar
2、ticipation in its preparation was 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 3475-80312002. This British Standard, having been prepared under the direction of the En
3、gineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 25 June 2002 - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and k
4、eep 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. Cros s-r e ferenc es The British Standards which implement international or Eu
5、ropean 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 British Standard does not purport to include all the ne
6、cessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, p
7、ages 2 and 3 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd.No. I Date I Comments O BSI 25 June 2002 ISBN O 580 3991 1 7 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3475-803 June 2002 I
8、Cs 49.060 English version Aerospace series - Cables, electrical, aircraft use - Test methods - Part 803: Capacitance variation Srie arospatiale - Cbles lectriques usage aronautique - Mthodes dessais - Partie 803: Ecart de capacit Luft- und Raumfahrt - Elektrischen Leitungen fr Luftfahrt Verwendung -
9、 Prfverfahren -Teil 803: Kapazittsabweichung This European Standard was approved by CEN on 20 January 2002 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 alteratio
10、n. 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 translation
11、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, Italy, Lu
12、xembourg, 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 any form
13、 and by any means reserved worldwide for CEN national Members. Ref. No. EN 3475-803:2002 E EN 3475-80312002 (E) Foreword This document (EN 3475-803:2002) has been prepared by the European Association of Aerospace Manufacturers (AECMA). After enquiries and votes carried out in accordance with the rul
14、es 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 identical te
15、xt or by endorsement, at the latest by December 2002, and conflicting national standards shall be withdrawn at the latest by December 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 3475-80312002 (E) 1 Scope This standard specifies a method for measuring the capacitance va
17、riation in a cable (multipair cables). 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 publicati
18、ons 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 Aero
19、space series - Cables, electrical, aircraft use - Test methods - Part 100: General EN 3475-801 Aerospace series - Cables, electrical, aircraft use - Test methods - Part 801: Capacitance per unit length 3 Preparation of specimens These shall be stripped and prepared for connection to the measuring de
20、vice. 4 Method The effective capacitances per unit length of each pair shall be measured as described in EN 3475-801. The mean effective capacitance per unit length C, is the arithmetic mean of the values for effective capacitance C per unit length of each pair. The capacitance variation AC expresse
21、d as a percentage shall be obtained from the formula : c - cn AC=IOOT The length of the sample shall be specified in the product standard. 5 The maximum value for capacitance variation shall be below the value specified in the product standard. Req u i remen t 3 BS EN 3475-803 12002 B SI 389 Chiswic
22、k 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 in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated b
23、y amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Stan
24、dard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive
25、 the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi
26、-. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standa
27、rds through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 71 11. Fax: +44 (0)20 8996 7048. Email: infomi-. Subscribing me
28、mbers of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details ofthese and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 700 1. Email: membershipbsi-. Information regardi
29、ng online access to British Standards via British Standards Online can be found at http:/www.bsi- Further information about BSI is available on the BSI website at http:/www.bsi-. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the
30、 international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means - electronic, photocopying, recording or otherwise -without prior written permission from
31、 BSI. This does not preclude the free use, in the course ofimplementing the standard, ofnecessary details such as symbols, and size, type or grade designations. Ifthese details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.
