1、BSI Standards PublicationBS EN 3475-514:2014Aerospace series Cables,electrical, aircraft use TestmethodsPart 514: Porosity of copper cladding onaluminium strandsBS EN 3475-514:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3475-514:2014.It supersedes BS EN
2、 3475-514:2007 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purpo
3、rt to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 83450 9ICS 49.060Compliance with a British Standard cannot confer immunity fromlegal obligations.Thi
4、s British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2014.Amendments issued since publicationDate Text affectedBS EN 3475-514:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3475-514 April 2014 ICS 49.060 Supersedes EN 3475-514:2007Eng
5、lish Version Aerospace series - Cables, electrical, aircraft use - Test methods - Part 514: Porosity of copper cladding on aluminium strands Srie arospatiale - Cbles lectriques usage aronautique - Mthodes dessais - Partie 514: Porosit dun revtement cuivre sur des brins aluminium Luft- und Raumfahrt
6、- Elektrische Leitungen fr Luftfahrtverwendung - Prfverfahren - Teil 514: Porositt von Einzeldrhten aus Aluminium mit einer Kupferauflage This European Standard was approved by CEN on 12 October 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi
7、tions 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists
8、 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national stand
9、ards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slo
10、venia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserve
11、d worldwide for CEN national Members. Ref. No. EN 3475-514:2014 EBS EN 3475-514:2014EN 3475-514:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Applicability 4 4 Preparation of specimens .4 5 Method (see note) .5 6 Requirements .5 BS EN 3475-514:2014EN 3475-514:2014 (E) 3 Fo
12、reword This document (EN 3475-514:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associ
13、ations and the Official Services of the member countries of ASD, prior to its presentation to CEN. 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 October 2014, and conflicting national standards
14、shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 3475-514
15、:2007. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fran
16、ce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 3475-514:2014EN 3475-514:2014 (E) 4 1 Scope This European Standard specifi
17、es an assessment method of the copper porosity on copper clad aluminium strands with or without external coating or on nickel or silver copper clad aluminium conductors. It shall be used together with EN 3475-100. 2 Normative references The following documents, in whole or in part, are normatively r
18、eferenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3475-100, Aerospace series - Cables, electrical, aircraft use - Tes
19、t methods - Part 100: General ASTM B 2981), Standard specification for silver-coated soft or annealed copper wire ASTM B 3551), Standard specification for nickel-coated soft or annealed copper wire ASTM B 566-931), Standard specification for copper-clad aluminum wire 3 Applicability This test method
20、 is applicable to any copper-clad aluminium wire or strand, that is to say: applicable to any class of copper-clad aluminium wire (class as defined by ASTM B 566-93). applicable to: a strand during its manufacturing process or before stranding; a complete conductor; a strand taken for a stranded con
21、ductor; a strand taken from a member belonging to a rope-lay conductor. it is applicable to any nickel or silver-coating class (class as defined respectively by ASTM B 298 or ASTM B 355). 4 Preparation of specimens Test specimen shall be of 2,30 m 10 % length and shall not be touched with bare finge
22、rs. The surface of the sample shall be free of oil or other contaminants. If necessary, clean it by wiping the specimen using a clean lint free material and an organic solvent (such as alcohol/ether 50/50). In order to limit curve stress, wrap it: 1) Published by: ASTM National (US) American Society
23、 for Testing and Materials http:/www.astm.org/. BS EN 3475-514:2014EN 3475-514:2014 (E) 5 on a mandrel of 40 mm for strands alone and then remove the mandrel, or around a minimum diameter of about 200 times its strand diameter for a stranded conductor. The ends should be removed from the windings in
24、 a length of about 0,15 m. 5 Method (see note) NOTE This method is coming from works lead separately by the Company FSP-one and above all by Drahtwerk Waidhaus GmbH at the origin of the “equation” bubbles = troubles. The 2 m centre part of the specimen shall be immersed in a pure solution of hydroch
25、loric acid which has a density of 1,088 g/cm3at 20 C: For strand: +01060 s; For complete conductor: +015 s. In no circumstances shall the specimen ends be immersed in the solution. During the immersion the specimen shall be examined carefully with the naked eye. If the copper is porous the hydrochlo
26、ric acid solution will come in contact with the aluminium metal and, as consequence of an active reaction, bubbles will appear immediately rising from the specimen surface to the surface of the test solution. The presence of some visible adherent bubbles on the conductor surface might already be cau
27、sed by a bad handling of the samples or surface contaminant and is not enough evidence that the nickel and copper layers of the sample have been damaged down to the aluminium core. 6 Requirements There shall be no bubbles rising from the specimen surface to the surface of the test solution. This pag
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