ASD-STAN PREN 2234-2016 Aerospace series Cable electrical fire resistant Technical specification (Edition P 4).pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 2234 Edition P 4 September 2016 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Supersedes edition

2、P 3 of November 2010 and will supersede EN 2234:2012 Descriptors: ENGLISH VERSION Aerospace series Cable, electrical, fire resistant Technical specification Luft- und Raumfahrt Elektrische Leitungen, feuerbestndig Technische Lieferbedingungen Srie arospatiale Cbles lectriques rsistant au feu Spcific

3、ation technique 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 technically approved by the experts

4、 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 examination and review by u

5、sers and formal agreement of ASD-STAN, the ASD-STAN prEN 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 b

6、y giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. ASD-STAN Technical Committee approves that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary, a

7、nd its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelle

8、d. ASD-STAN invites you to send your written comments or any suggestions that may arise. All rights reserved. No parts of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, witho

9、ut prior written permission of ASD-STAN. Order details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1st September 2016 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2016 ASD-STAN prE

10、N 2234:2016 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Terms, definitions and symbols . 3 4 Materials and construction . 3 5 Required characteristics 5 6 Tests method 5 7 Quality assurance 8 8 Identification marking 10 10 Packaging, labelling and delivery lengths 11 Foreword

11、 This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries 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. prEN 2234:2016 (E) 3 1 Scop

12、e This standard specifies the required characteristics and test procedures for fire resistant or fire-proof electrical cables for use in aircraft electrical systems. These cables should also maintain a specific surface resistance when they are subjected to a flame of 1 100 C after 5 minutes (fire re

13、sistant) or 15 minutes (fire-proof) exposure. The insulation of these cables is designed to withstand aircraft voltages at a frequency not exceeding 2 000 Hz. Unless specified by individual product standards the maximum demonstrated ac voltage of rating of these cables is 115 V rms (phase to neutral

14、) and 200 V rms (phase to phase) and a long term temperature of up to 260 C (ambient temperature plus temperature rise in conductor). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated

15、references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3475-100 (all parts), Aerospace series Cables, electrical, aircraft use Test methods Part 100: General EN 3838, Aerospace series Requirements and t

16、ests on user-applied markings on aircraft electrical cables EN 9102, Aerospace series Quality systems First article inspection EN 9133, Aerospace series Quality Management Systems Qualification Procedure for Aerospace Standard Products ISO 2574, Aircraft Electrical cables Identification marking ISO

17、8815, Aircraft Electrical cables and cable harnesses Vocabulary IEC 60028:1925, International standard of resistance for copper 3 Terms, definitions and symbols For the purposes of this document, the terms, definitions and symbols given in ISO 8815 and EN 3475-100 apply. 4 Materials and construction

18、 4.1 Conductors 4.1.1 Materials The individual strands used for the conductors shall be cylindrical and shall be: of nickel clad copper alloy for nominal cross section of 0,25 mm2 and 0,4 mm2; of nickel clad copper for nominal sections 0,6 mm2. The copper shall meet the requirements of IEC 60028 and

19、 the copper alloy the requirements of this standard. prEN 2234:2016 (E) 4 The nickel shall not represent less than 27 % of the total mass of the individual strand. Individual strands shall show the following minimum breaking strength: 280 N/mm2 for nickel clad copper; 315 N/mm2 for nickel clad coppe

20、r alloy. 4.1.2 Lay length Up to 9 mm2 cross section inclusive (code 090), concentric or unilay conductors are used. The lay for the stranded conductor, checked over the outside layer of a test piece 1 m long, shall be between 8 times and 16 times the maximum diameter of this conductor. For sectional

21、 areas between 14 mm2 and 68 mm2 (codes 140 to 680), the conductor comprises concentric or bunched conductors twisted together. The lay of the strands for the basic concentric or bunched conductors shall not exceed 30 times the diameter of the concentric or bunched conductor in question. The lay for

22、 concentric (or bunched) conductors, measured over the outer layer of the conductor, shall be between 8 times and 16 times the maximum conductor diameter. In all cases the lay of the outer layer shall be left-hand. 4.1.3 Joints The conductors shall be free from any joints. Each strand comprising the

23、 conductors may, however, include soldered or brazed joints. For strands with a diameter of 0,25 mm or greater, butt joints shall be used. The distance between two joints in individual strands shall exceed 3 m, measured between different strands. 4.1.4 Compaction Compaction of the causing deformatio

24、n of the strands or damage to the plating is not permitted. 4.2 Construction Finished cables The insulation shall be of a material, which takes on the circular shape of the conductor throughout its length. It shall closely cover the conductor without adhering to it, so that it reduces the corona eff

25、ect and the risk of blistering and heat corrosion due to voids and gaseous discharges. The insulation shall be neither too tight nor too loose, so as to provide satisfactory mechanical characteristics and be easily removable using commercially available tools. (See Table 1, 6.45). The protective she

26、ath shall be of a material, which takes on the round shape of the insulated conductor lying under it. It shall provide adequate protection from mechanical damage and contamination by liquids, as specified in the product standard. The outer surface shall be smooth and suitable for identification mark

27、ing. The protective sheath shall not have a corrosive effect on the screen and shall be resistant to fungus and other. prEN 2234:2016 (E) 5 5 Required characteristics The characteristics of the cables, tested according to the methods described hereafter shall comply with the values given in the prod

28、uct standard. 6 Tests method See Table 1. Table 1 Tests: methods, application, requirements (1 of 4) No. Tests Requirements (and/or particulars) Description EN 3475- (and/or particulars) Qualification a (see 7.1). Firstarticle inspection(see 7.2.5)Each delivery Periodic everythree years(7.2.4)On all

29、cables (7.2.1 and7.2.2) Prior to delivery(7.2.3)6 Test conditions 100 X X X X X 6.1 Visual examination 201 3 3 X Product standard 6.2 Mass 202 minimum length 0,5 m 3 3 X Product standard 6.3 Dimensions 203 3 3 X X X Product standard 6.4 Ohmic resistance per unit length 301 3 3 X Product standard 6.1

30、.5 Voltage proof test: 302 immersion test; 3 3 X 2,5 KV r.m.s. dry test; X 5 KV r.m.s. or dry impulse test. Alternative to dry test X 8 KV peak voltage 6.6 Insulation resistance 303 3 3 For a length of 1 km: at (20 2) C; X 500 M at (95 2) C. X 1 M 6.7 Surface resistance 304 3 Minimum: 1 250 m mm 6.8

31、 Overload resistance 305 T1 and T2: product standard 3 X Applicable to code 006 only 6.9 Continuity of conductors 306 X X X 6.10 Accelerated ageing 401 Mandrel diameter and test load: Table 5 3 3 X prEN 2234:2016 (E) 6 Table 1 Tests: methods, application, requirements (2 of 4) No. Tests Requirements

32、 (and/or particulars) Description EN 3475- (and/or particulars) Qualification a (see 7.1). Firstarticle inspection(see 7.2.5)Each delivery Periodic everythree years(7.2.4)On allcables (7.2.1 and7.2.2) Prior to delivery(7.2.3)6.11 Shrinkage and delamination 402 Temperature: product standard 3 3 X Pro

33、duct standard 6.12 Delamination and blocking 403 Mandrel diameter: Table 5 Temperature: product standard 3 3 X Product standard 6.13 Thermal shock 404 Temperature: product standard 3 3 X Product standard 6.14 Bending at ambient temperature 405 Mandrel diameter: Table 5 3 X 6.15 Cold bend test 406 Ma

34、ndrel diameter and test load: Table 5 Temperature: product standard 3 3 X Product standard 6.16 Flammability 407 3 X Product standard 6.17 Fire resistance 408 Per fluid tested 1 X X Without fluid immersion for tests prior to delivery. 6.18 Air-excluded ageing 409 Temperature and time: product standa

35、rd 3 X 6.19 Thermal endurance 410 Temperature and time: product standard X Product standard Applicable to code 006 only. 4 10 samples 6.20 Resistance to fluids 411 Per fluid tested 1 X 6.21 Humidity resistance 412 Method A or B as requested in product standard 3 X 6.22 Wrap back test 413 3 3 X Appli

36、cable to cables 5 mm2 prEN 2234:2016 (E) 7 Table 1 Tests: methods, application, requirements (3 of 4) No. Tests Requirements (and/or particulars) Description EN 3475- (and/or particulars) Qualification a (see 7.1). Firstarticle inspection(see 7.2.5)Each delivery Periodic everythree years(7.2.4)On al

37、lcables (7.2.1 and7.2.2) Prior to delivery(7.2.3)6.23 Differential scanning calorimeter (DSC test) 414 3 3 X 6.24 Rapid change of temperature 415 Not applicable 6.25 Thermal stability 416 Not applicable 6.26 Fire resistance of cable inside shielded harness 417 X Product standard 6.27 Dynamic cut-thr

38、ough 501 Temperature: product standard 3 3 X Product standard 6.28 Notch propagation 502 Cut depth: product standard 3 3 X 6.29 Scrape abrasion 503 Load : product standard 3 3 X Requirement to be considered at 20 C unless otherwise specified 6.30 Torsion 504 Test load: Table 5 T3 and T4: product sta

39、ndard 3 X Applicable to 5 mm2 6.31 Tensile test on conductors and strands 505 3 X X See 4.1 of this standard. 6.32 Plating continuity 506 3 X X 6.33 Adherence of plating 507 3 X X 634 Plating thickness 508 3 X X 6.35 Solderability 509 3 X X Product standard 6.36 Tensile strength and elongation of ex

40、truded insulation, sheath and jacket materials 510 4 X X Product standard 6.37 Cable-to-cable abrasion 511 1 X Product standard 6.38 Flexure endurance 512 3 X Product standard 6.39 Deformation resistance (Installation with plastic cable ties) 513 Not applicable prEN 2234:2016 (E) 8 Table 1 Tests: me

41、thods, application, requirements (4 of 4) No. Tests Requirements (and/or particulars) Description EN 3475- (and/or particulars) Qualification a (see 7.1). Firstarticle inspection(see 7.2.5)Each delivery Periodic everythree years(7.2.4)On allcables (7.2.1 and7.2.2) Prior to delivery(7.2.3)6.40 Smoke

42、density 601 X Product standard 6.41 Toxicity 602 X Product standard 6.42 Resistance to wet arc tracking and electric arc propagation 603 X X b Product standard 6.43 Resistance to dry arc tracking and electric arc propagation 604 X X b Product standard 6.44 Wet short circuit test 605 X X b Product st

43、andard 6.45 Strippability and adherence of insulation to the conductor 701 3 3 X Adherence force minimum: Table 5 6.46 Screen pushback capability 702 NOT APPLICABLE 6.47 Permanence of manufacturers marking 703 3 3 X Product standard 6.48 Flexibility 704 2 X Product standard 6.49 Permanence of user-a

44、pplied marking EN 3838 X Product standard Contrast measurement 705 Laser parameters: 706 X X X X Product standard a Number of specimens per cross section for each test unless otherwise specified. b By means of tests or theoretical justification. 7 Quality assurance 7.1 Qualification 7.1.1 General re

45、quirements See EN 9133 and EN 9102. prEN 2234:2016 (E) 9 7.1.2 Qualification conditions The cables shall be submitted for qualification tests on drums, spools or in coils in sufficient lengths, wound evenly and uniformly. Each drum, spool or coil shall have a label containing information given in 9.

46、1. 7.1.3 Qualification tests See Table 1. 7.1.4 Extension of qualification The qualification granted may be applicable to adjacent cross-sections in accordance with Table 2 and Table 3. Table 2 Qualified cables and extension to qualification Single core Qualified cables Cables covered by the same qu

47、alification Nominal cross-section AWG a Nominal cross section AWG a mm2 mm2 0,4 22 0,25 to 0,4 24 to 22 0,6 20 0,6 to 1 20 to 18 2 14 1,2 to 5 16 to 10 9 8 9 to 34 8 to 2 53 0 42 to 68 1 to 00 a Closest American Wire Gage. For cross-sections 9 mm2 to 68 mm2, different reference cross-section may be

48、selected after agreement with the mandated body. Table 3 Qualified cables and extension to qualification Multicore unshielded Number of conductors Qualified cables Cables covered by the same qualification Nominal cross-section AWG a Number of conductors Nominal cross-section AWG a mm2 mm2 2 0,6 20 2

49、 and 3 0,25 - 0,4 - 0,6 - 1 - 1,2 - 2 24-22 - 20 - 18 - 16 - 14 a Closest American Wire Gage. prEN 2234:2016 (E) 10 7.2 Acceptance tests 7.2.1 Required conditions 7.2.1.1 General See Table 1. The acceptance tests shall be carried out on cables delivered against an order to check that the cable characteristics are maintained. 7.2.1