1、BRITISH STANDARDBS EN 3475-506:2007Aerospace series Cables, electrical, aircraft use Test methods Part 506: Plating continuityThe European Standard EN 3475-506:2007 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44
2、g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3475-506:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2007 BSI 2007ISBN 978 0 580 55882 5National forewordT
3、his British Standard is the UK implementation of EN 3475-506:2007. It supersedes BS EN 3475-506:2002 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Panel ACE/6/-/2, Aerospace Cables.A
4、list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from le
5、gal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3475-506August 2007ICS 49.060 Supersedes EN 3475-506:2002 English VersionAerospace series - Cables, electrical, aircraft use - Testmethods - Part 506: Plating continuitySrie aro
6、spatiale - Cbles lectriques usagearonautique - Mthodes dessais - Partie 506 : Continuitdu revtementLuft- und Raumfahrt - Elektrische Leitungen frLuftfahrtverwendung - Prfverfahren - Teil 506:Gleichmaigkeit des berzugsThis European Standard was approved by CEN on 21 June 2007.CEN members are bound to
7、 comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Mana
8、gement 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as th
9、eofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia,
10、Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN
11、national Members.Ref. No. EN 3475-506:2007: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Preparation of specimens.4 4 Method 5 5 Requirements.5 EN 3475-506:20073 Foreword This document (EN 3475-506:2007) has been prepared by the Aerospace and Defence Industries Association of Euro
12、pe - 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 Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Stan
13、dard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2008, and conflicting national standards shall be withdrawn at the latest by February 2008. Attention is drawn to the possibility that some of the elements o
14、f 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 3475-506:2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following cou
15、ntries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Sp
16、ain, Sweden, Switzerland and the United Kingdom. EN 3475-506:20074 1 Scope This standard specifies a method of verifying the continuity of plating on strands which are: either checked before stranding or screening, or checked after stranding or screening It shall be used together with EN 3475-100. 2
17、 Normative references The following referenced documents are indispensable for the application of this document. 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 seri
18、es Cables, electrical, aircraft use Test methods Part 100: General. ASTM B 33-81, Standard specification for tinned soft or annealed copper wire for electrical purposes. 1)ASTM B 298-99, Standard specification for silver-coated soft or annealed copper wire. 1)ASTM B 355-95, Standard specification fo
19、r nickel-coated soft or annealed copper wire. 1)3 Preparation of specimens 3.1 General The ASTM B 33 or ASTM B 298 or ASTM B 355 plating continuity test method applies to single end wires taken before stranding or before screening. Thus the applicability of the polysulfide test is restricted by the
20、ASTM in recognition of the abrasion to the wire inherent in the stranding or in the screening process. 3.2 Strands before stranding or screening 3.2.1 Copper strands Prepare three strands at least 150 mm long as specimens and carefully straighten them by hand. Degrease the strands without damaging t
21、hem and wipe them with a clean dry cloth. After cleaning, the strands shall not be touched with bare fingers. The length of the specimen which is immersed shall be at least 110 mm. 3.2.2 Copper-clad aluminum strands Prepare three strands at least 150 mm long as specimens. Degrease the strands withou
22、t damaging them and wipe them with a clean dry cloth. After cleaning, the strands shall not be touched with bare fingers. 1) Published by: American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, USA. EN 3475-506:20075 By using gloves,
23、wind five turns of each strand on a mandrel which the diameter is about 12 times the strand diameter. NOTE Due to hardness differences between, aluminium, copper and coating (particularly nickel) materials and possible associated drawbacks during strand drawings after plating, turns are necessary to
24、 reveal possible weakness. 3.3 Strands after stranding or screening 3.3.1 General Due to the above restriction by the ASTM in recognition of the abrasion to the wire inherent in the stranding or in the screening process, the following preparation of specimens apply when testing stranded or screened
25、product: 1) Unilay or Concentric constructions to be tested as the whole conductor. 2) Two members from each layer of rope constructions to be tested after they have been carefully removed from the finished rope. 3) Screen to be tested as whole conductor after it has been carefully separated from ca
26、ble jacket and from inner core(s). 3.3.2 Copper conductors or copper screens Prepare three samples at least 150 mm long as specimens. Degrease the specimens without damaging them and wipe them with a clean dry cloth. After cleaning, the specimens shall not be touched with bare fingers. The length of
27、 the specimen which is immersed shall be at least 110 mm. 3.3.3 Copper-clad aluminum conductors Prepare three samples at least 150 mm long as specimens. Degrease the specimens without damaging them and wipe them with a clean dry cloth. After cleaning, the specimens shall not be touched with bare fin
28、gers. By using gloves, wind five turns of each conductor on a mandrel which diameter is about 12 times the conductor diameter. 4 Method Place the specimens for 30 s in a sodium polysulphide solution which has a density of 1,142 g/cm3at 20 C, then wash them carefully in distilled water. In addition,
29、for silver plating, the samples shall then be immersed for 15 s in a solution of hydrochloric acid which has a density of 1,088 g/cm3at 20 C. The specimens shall then be washed carefully again in distilled water. 5 Requirements Examination shall occur immediately after the solution cycle. There shal
30、l be no adherent or distinctly visible black spots when examined with the naked eye. Any blackening occurring less than 15 mm from each end shall be disregarded. EN 3475-506:2007BS EN 3475-506:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national b
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