1、ASD STANDARD NORME ASD ASD NORM prEN 3475-514 Edition P 1 September 2006 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 763 3565 - www.asd-stan.orgICS: 49.060 Descriptors: Aerospace indust
2、ry, aircraft equipment, electrical cable test ENGLISH 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 de
3、s brins aluminium Luft- und Raumfahrt Elektrische Leitungen fr Luftfahrtverwendung Prfverfahren Teil 514: Porositt von Einzeldrhten aus Aluminium mit einer Kupferauflage This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries A
4、ssociation of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed
5、to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) fo
6、r formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 30 Septembe
7、r 2006 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2006 by ASD-STAN Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permi
8、tted without license from IHS-,-,-prEN 3475-514:20062 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Applicability3 4 Preparation of specimens.3 5 Method 4 6 Requirements.4 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inq
9、uiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo
10、reproduction or networking permitted without license from IHS-,-,-prEN 3475-514:20063 1 Scope This standard specifies 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 use
11、d together with EN 3475-100. 2 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) applie
12、s. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General. ASTM B 298, Standard specification for silver-coated soft or annealed copper wire. 1)ASTM B 355, Standard specification for nickel-coated soft or annealed copper wire. 1)ASTM B 566-93, Standard specific
13、ation for copper-clad aluminum wire. 1)3 Applicability This test method 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 be
14、fore stranding; a complete conductor; a strand taken for a stranded conductor; 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
15、shall be of (2,30 10) % meters length and shall not be touched with bare fingers. The surface of the sample shall be free of oil or other contaminants. Degrease the specimen in a suitable organic solvent for at least 2 mn (such as alcohol/ether 50/50) without damaging it and dry it carefully in the
16、air. 1) Published by: American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, USA. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or netw
17、orking permitted without license from IHS-,-,-prEN 3475-514:20064 In order to limit curve stress, wrap it: 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 fro
18、m the windings in a length of about 0,15 meter. 5 Method 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 meters centre part of the specimen shall be immersed for 1 mn +010s
19、 in a pure solution of hydrochloric acid which has a density of 1,088 g/cm3at 20 C. In no case the ends of the specimen must be immersed in the solution. During the immersion the specimen shall be examined carefully with the naked eye. If the copper is porous the hydrochloric acid solution will come
20、 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 caused by a bad handling of th
21、e 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. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
