AECMA PREN 3475-201-1992 Aerospace Series Cables Electrical Aircraft Use Test Methods Part 201 - Visual Examination Issue P 1《航天系列 飞行器用的电缆试验方法.第201部分.表观检验》.pdf

1、ASD STANDARD NORME ASD ASD NORM prEN 3475-100 Edition P 3 October 2005 PUBLISHED BY THE AEROSPACE AND DEFENSE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8111 - www.asd-stan.orgICS: 49.060 Will supersede EN 3475-100:2002

2、 Descriptors: ENGLISH VERSION Aerospace series Cables, electrical, aircraft use Test methods Part 100: General Srie arospatiale Cbles lectriques usage aronautique Mthodes dessais Partie 100 : Gnralits Luft- und Raumfahrt Elektrische Leitungen fr Luftfahrtverwendung Prfverfahren Teil 100: Allgemeines

3、 This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-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 of the concerned Domain

4、following member comments. Subsequent to the publication of this pre-standard, 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 users and formal agreemen

5、t of ASD-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 the status of a nationa

6、l standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 31 October 2005 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2005 by ASD-STAN Copyright Association Europeene des Construc

7、teurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-100:20052 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and vot

8、es carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. Contents Page 1 Scope . 3 2 Normative references 3 3 Terms, definitions and symbols 3 4 Symbols and abbreviations 6 5 Test conditions. 6 6 List of

9、 test methods. 6 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-100:20053 1 Scope This standard gives general information and the list of te

10、st methods for the different characteristics required for cables used in aircraft electrical circuits. 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 l

11、atest edition of the referenced document (including any amendments) applies. EN 3475*, Aerospace series Cables, electrical, aircraft use Test methods. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 conductor the conducting element of a cable

12、 formed from one or more strands 3.2 strand metallic cylindrical component of uniform section used to form the conductor or shielding 3.3 plated strand strand covered by a thin metallic layer in order to improve performance or facilitate connections 3.4 jacket external covering of a cable containing

13、 one or more screened or unscreened conductor(s) 3.5 insulation the part of the cable surrounding the conductor and consisting of insulating material 3.6 sheath protective envelope added to the insulated conductor when necessary to improve its properties of mechanical resistance or resistance to flu

14、ids NOTE It may also be added to provide a surface to facilitate marking. 3.7 screen conducting envelope applied to the cable or conductors so as to reduce electromagnetic or electrostatic interference * All parts quoted in this standard. Copyright Association Europeene des Constructeurs de Materiel

15、 Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-100:20054 3.8 concentric conductor assembly comprising several strands, all arranged in the form of a spiral, in regular layers NOTE The directions of lay

16、 of the strand, passing from one stranded layer to the next layer is either alternate or the same. The lay for the various layers may be different or the same. 3.9 bunched conductor assembly of several strands, all arranged in the form of a spiral, in the same direction and with the same lay 3.10 ro

17、pe stranded conductor assembly comprising a certain number of concentric or bunched conductors arranged in the form of a spiral and in regular layers, the different layers being laid in opposite directions 3.11 specimen a portion of conductor or cable of defined length, taken from a particular secti

18、on of cable 3.12 insulated conductor the whole of the conductor and its insulation which makes up a complete cable with one or more conductors 3.13 cable, electrical an assembly consisting of conductor, insulation and, where applicable, sheath, screen and jacket 3.14 airframe cable cable suitable fo

19、r open aircraft wiring and engine compartments without additional protection 3.15 fire-resistant cable cable which is capable of maintaining a defined performance during the application of a standard 1 100 C flame for a period of 5 min 3.16 fire proof cable cable which is capable of maintaining a de

20、fined performance during the application of a standard 1 100 C flame for a period of 15 min 3.17 conductor cross-sectional areas the sums of the cross-sectional areas of the component strands of the conductor 3.18 conductor size number used to define the gauge of the conductor, this number correspon

21、ds approximately to the American Wire Gauge number 3.19 direction of cabling (or lay) a “lefthand“ direction of lay is shown in the sketch below Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networki

22、ng permitted without license from IHS-,-,-prEN 3475-100:20055 Lefthand lay Equivalence of terms and designations Core Conducteur isol Ader Multicore twisted, screened and jacketed cable (example 3 cores) Cble multiconducteurs torsad, blind et gain (exemple 3 conducteurs) Mehradrig verseilte, geschir

23、mte und ummantelte Leitungen (Beispiel 3-adrig) Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-100:20056 Conductor Conducteur Leiter Concent

24、ric stranded conductorConducteur toronn ou toronKonzentrischer Leiter Rope lay strand Conducteur toronn cbl Seil (schenkelverseilter Leiter)Bunched conductor Conducteur tordonn ou tordonVerwrgter Leiter 4 Symbols and abbreviations = numerical value of Celsius temperature for which Rwill be calculate

25、d R= resistance per unit length at C R20 = resistance per unit length at 20 C (reference value) U= voltage drop at C U20= voltage drop at 20 C T1, T2, etc. = successive temperatures mentioned in a test procedure method I1, I2, etc. = currents mentioned in a test procedure method 5 Test conditions Un

26、less otherwise stated in the test method, the technical specification, or the product standard, the test conditions shall be: temperature: (20 5) C; atmospheric pressure: 86 kPa to 106 kPa (860 mbar to 1 060 mbar); relative humidity: 45 % to 75 %. The temperature and humidity shall remain constant d

27、uring a series of measurements. 6 List of test methods See Tables 1 to 7. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-100:20057 Table 1 G

28、eneral tests EN 3475- Designation of the test 201 Visual examination 202 Mass 203 Dimensions Table 2 Electrical tests EN 3475- Designation of the test 301 Ohmic resistance per unit length 302 Voltage proof test 303 Insulation resistance 304 Surface resistance 305 Overload resistance 306 Continuity o

29、f conductors 307 Corona extinction voltage Table 3 Environmental tests EN 3475- Designation of the test 401 Accelerated ageing 402 Shrinkage and delamination 403 Delamination and blocking 404 Thermal shock 405 Bending at ambient temperature 406 Cold bend test 407 Flammability 408 Fire resistance she

30、ath and jacket material 409 Air-excluded ageing 410 Thermal endurance 411 Resistance to fluids 412 Humidity resistance sheath and jacket material 413 Wrap back test 414 Differential scanning calorimeter (DSC test) 415 Rapid change of temperature 416 Thermal stability 417 Fire resistance of cables co

31、nfined inside a harness 418 Thermal endurance for conductors Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-100:20058 Table 4 Mechanical tes

32、ts EN 3475- Designation of the test 501 Dynamic cut-through 502 Notch propagation 503 Scrape abrasion 504 Torsion 505 Tensile test on conductors and strands 506 Plating continuity 507 Adherence of plating 508 Plating thickness 509 Solderability 510 Tensile strength and elongation of extruded insulat

33、ion, sheath and jacket material 511 Cable-to-cable abrasion 512 Flexure endurance 513 Deformation resistance (Installation with plastic cable ties) 514 Porosity of copper cladding on aluminium strands Table 5 Sundry tests EN 3475- Designation of the test 601 Smoke density 602 Toxicity 603 Resistance

34、 to wet arc tracking 604 Resistance to dry arc propagation 605 Wet short circuit test Table 6 Handling tests EN 3475- Designation of the test 701 Strippability and adherence of insulation to the conductor 702 Screen pushback capability 703 Permanence of manufacturers marking 704 Flexibility 705 Cont

35、rast measurement 706 Laser markability Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-100:20059 Table 7 High frequency tests EN 3475- Design

36、ation of the test 801 Capacitance per unit length 802 Capacitance unbalance 803 Capacitance variation 804 Velocity of propagation 805 Characteristic impedance 806 Attenuation 807 Transfer impedance 808 Cross-talk 809 Resistance unbalance (DC) 810 Structural return loss 811 Unbalance attenuation Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-