1、ASD STANDARD NORME ASD ASD NORM prEN 3475-100 Edition P 4 June 2009 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.orgICS: Supersedes edition P 3 of Octobe
2、r 2005 and will supersede EN 3475-100:2002 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 Leitungenfr Luftfahrtverw
3、endung Prfverfahren Teil 100: Allgemeines This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technical
4、ly 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 to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After e
5、xamination 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) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at natio
6、nal 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 10 June 2009 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2009 by ASD-ST
7、AN prEN 3475-100:20092 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Terms and definitions .3 4 Symbols and abbreviations 6 5 Test conditions 6 6 List of test methods.6 Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANs Electrical Domain. After inqu
8、iries 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. prEN 3475-100:20093 1 Scope This standard gives general information and the list of test methods for the different characteristic
9、s 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 latest edition of the referenced document (i
10、ncluding any amendments) applies. EN 3475 (all series), 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 formed from one or more strand
11、s 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 one or more screened or unscre
12、ened 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 fluids NOTE It may also be added t
13、o 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 prEN 3475-100:20094 3.8 concentric conductor assembly comprising several strands, all arranged in the form of a spiral, in regula
14、r layers NOTE The directions of lay 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 dire
15、ction and with the same lay 3.10 rope 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 le
16、ngth, taken from a particular section 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.
17、14 airframe cable cable suitable for 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 w
18、hich is capable of maintaining a defined 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 t
19、he conductor, this number corresponds 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 prEN 3475-100:20095 Lefthand lay Equivalence of terms and designations Core Multicore twisted, screened andjacketed cabl
20、e (example 3 cores)Core Conductor Insulation Sheath Core or insulated conductorCore Cabled cores Inner sheath Outer jacket Screen: braid or spiral screen prEN 3475-100:20096 Conductor Concentric stranded conductor Rope lay strand Bunched conductor 4 Symbols and abbreviations = numerical value of Cel
21、sius temperature for which Rwill be calculated 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
22、 a test procedure method 5 Test conditions Unless 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 tem
23、perature and humidity shall remain constant during a series of measurements. 6 List of test methods See Tables 1 to 7. Strand prEN 3475-100:2009 7 Table 1 General tests EN 3475- Designation of the test 201 Visual examination 202 Mass 203 Dimensions Table 2 Electrical tests EN 3475- Designation of th
24、e test 301 Ohmic resistance per unit length 302 Voltage proof test 303 Insulation resistance 304 Surface resistance 305 Overload resistance 306 Continuity of conductors 307 Corona extinction voltage Table 3 Environmental tests EN 3475- Designation of the test 401 Accelerated ageing 402 Shrinkage and
25、 delamination 403 Delamination and blocking 404 Thermal shock 405 Bending at ambient temperature 406 Cold bend test 407 Flammability 408 Fire resistance 409 Air-excluded ageing 410 Thermal endurance 411 Resistance to fluids 412 Humidity resistance 413 Wrap back test 414 Differential scanning calorim
26、eter (DSC test) 415 Rapid change of temperature 416 Thermal stability 417 Fire resistance of cables confined inside a harness 418 Thermal endurance for conductors prEN 3475-100:20098 Table 4 Mechanical tests EN 3475- Designation of the test 501 Dynamic cut-through 502 Notch propagation 503 Scrape ab
27、rasion 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 insulation, sheath and jacket material 511 Cable-to-cable abrasion 512 Flexure endurance 513 Deformati
28、on resistance (Installation with plastic cable ties) 514 Porosity of copper cladding on aluminium strands 515 Crush resistance Table 5 Sundry tests EN 3475- Designation of the test 601 Smoke density 602 Toxicity 603 Resistance to wet arc tracking 604 Resistance to dry arc propagation 605 Wet short c
29、ircuit 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 Contrast measurement 706 Laser markability prEN 3475-100:2009 9 Table 7 High f
30、requency tests EN 3475- Designation 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 810 Structural return loss 811 Unbalance attenuation 812 Return loss (VSWR) 813 Power rating
