1、AECMA STANDARD NORME AECMA AECMA NORM prEN 3475-51 I Edition P 1 July 1997 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 6-1 200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs : Descriptors : ENGLISH VERSION Aerospace series Cables, electrical
2、, aircraft use Test methods Part 51 1 : Cable-to-cable abrasion Srie arospatiale Luft- und Raumfahrt Mthodes dessais Prfverfahren Cbles lectriques 21 usage aronautique Elektrischen Leitungen fr Luftfahrt Verwendung Teil 51 1 : Abried Leitung gegen Leitung Partie 51 1 : Abrasion cble-cble This “Aeros
3、pace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by th
4、e Member countries. 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 signature of the AECMA Standard Checking Ce
5、ntre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921
6、38 ISSY-LES-MOULINEAUX CEDEX I Comments should be sent within six months after the date of publication to I Edition approved for publication 1997-07-31 AECMA Gulledelle 94 B-1200 BRUXELLES C2 Chairman Mr Pezzetta 0 aecma 1997 STD-AECMA PREN 3475-533-ENGL 1997 30323L3 0033395 57T Page 3 prEN 3475-51
7、1 : 1997 1 Scope This standard specifies a procedure for measuring cable-to-cable abrasion resistance. 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 a
8、re cited at the appropriate places in the text and the publications 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
9、edition of the publication referred to applies. EN 3475-100 Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100 : General 1) 3 Preparation of specimens Sufficiently long test specimens are sampled from insulated conductors and are placed on the device described on figure 1.
10、 This test defines the deterioration caused by the electrical cable rubbing against another cable in a vibratory environment. This deterioration is revealed by the wear caused of the different materials. Therefore, this test makes it possible to determine the effect of the roughness of the different
11、 insulators used when mixed together in a bundle. Generally, the test is run on gauge 20 cables. This test is run at ambient temperature. 4 Apparatus The principle of the test apparatus principle is described in figure 1. Cable B Weight Figure 1 1) Published as AECMA Prestandard at the date of publi
12、cation of this standard Previous page is blank Page 4 prEN 3475-5 1 1 : 1 997 The first cable A shall be installed on a support fixed to an exciter generating (6,35 f 25) mm dual amplitude 1 O HZ vibrations. The second cable B to be tested shall be suspended from a fixed part and shall be in contact
13、 with the first part in compliance with figure 1. A weight holds the cable in tension. As the contact point is approximately in the middle of cable A, the angle and 22O. shall be between 20 This device shall be fitted with a short-circuit detection system, mounted between the two cables being tested
14、, which slaves the operation of a clock. 5 Method Test samples are installed with weight M, the value of which is specified in the product standard. A previous test run will make it possible to adjust the distance between the pulley and this weight so as to avoid any possible resonance. The test can start when the short-circuit detection system is connected and the counter reset to zero. 6 Requirements The minimum duration between the beginning of the test and stopping caused by triggering of the detection system shall be greater than the value specified in the product standard.
