1、AECMA STANDARD NORME AECMA AECMA NORM prEN 3475-501 Edition P 2 March 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: 49.060Will supersede EN 3475-501:2002 Desc
2、riptors: ENGLISH VERSION Aerospace series Cable, electrical, aircraft use Test methods Part 501: Dynamic cut-through Srie arospatiale Cbles lectriques usage aronautique Mthodes dessais Partie 501 : Rsistance la coupure Luft- und Raumfahrt Elektrische Leitungen fr Luftfahrtverwendung Prfverfahren Tei
3、l 501: Kerbfestigkeit This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts o
4、f the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by use
5、rs and formal agreement of AECMA-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for 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
6、 the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 31 March 2005 Comments should be sent within six months after the date of publication to AECMA-STAN Electrical Domain Copyright 2005 by AECMA-STAN Page 2 prEN 3475-5
7、01:2005Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA-STANs General Process Manual, this standard has received approval for Publication. Conten
8、ts Page 1 Scope 3 2 Normative references. 3 3 Preparation of specimens. 3 4 Apparatus 3 5 Method. 4 6 Requirements 4 Page 3 prEN 3475-501:20051 Scope This standard specifies a method of measuring the resistance to cut-through of an insulated conductor or jacket. This test is limited to cables smalle
9、r than code 140 (gauge size 6) and insulations with a thickness of 0,38 mm or less. It shall be used 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
10、undated references, the latest edition of the referenced document (including any amendments) applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General. 3 Preparation of specimens The test specimen shall be a single 450 mm length of insulated cable. Remove
11、 sufficient insulation from one end of the specimen for connection to the detection circuit. 4 Apparatus A tensile tester (or equivalent apparatus) shall operate in a compression mode and be equipped with a means to record the force necessary to drive the cutting edge through the insulation of a fin
12、ished cable specimen. The cutting edge shall be positioned across the specimen at 90 to its longitudinal axis and shall have the dimensions shown in Figure 1. The tester shall also be equipped with a chamber that allows the test to be performed after stabilisation at elevated temperatures, and a low
13、 voltage detection circuit shall stop the tester when the edge cuts through the insulation and contacts the conductor. Page 4 prEN 3475-501:2005Figure 1 Needle holder 5 Method Carry out the test at the temperature specified in the applicable product standard. At elevated temperatures the apparatus m
14、ust be stabilised prior to each test which may require up to one hour (1 h) depending upon chamber and specimen size. Move the cutting edge through the insulation at a constant rate of loading of (1 0,1) N/s at the specimen until contact with the conductor occurs. Move the specimen longitudinally a
15、minimum of 25 mm and rotate it 90 between each test, keeping the direction of movement and rotation constant. Perform eight individual tests on the specimen. Record the force at cut-through for each test. 6 Requirements The arithmetic mean value of the eight measured cut-through results shall exceed the value given in the product standard.
