ASD-STAN PREN 2234-2010 Aerospace series Cable electrical fire resistant Technical specification (Edition P 3).pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 2234 Edition P 3 November 2010 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 Editio

2、n P2 October 2001 Descriptors: ENGLISH VERSION Aerospace series Cable, electrical, fire resistant Technical specification Srie arospatiale Cbles lectriques rsistant au feu Spcification technique Luft- und Raumfahrt Elektrische Leitungen, feuerbestndig Technische Lieferbedingungen This “Aerospace Ser

3、ies“ 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 of the concerned Domain following

4、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 users and formal agreement of ASD-ST

5、AN, 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 national standard

6、and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1 November 2010 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2010 by ASD-STAN prEN 2234:2010 (E) 2 Contents Page Foreword2 1 Scope 3

7、2 Normative references 3 3 Definitions and symbols .3 4 Materials and construction .3 5 Required characteristics.5 6 Tests method5 7 Quality assurance8 8 Identification marking 10 9 Packaging, labelling, and delivery lengths 10 Foreword This standard was reviewed by the Domain Technical Coordinator

8、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 2234:2010 (E) 3 1 Scope This standard specifies the required characteristics and test

9、procedures for fire resistant or fire-proof electrical cables for use in aircraft electrical systems. These cables shall also maintain a specific surface resistance when they are subjected to a flame of 1 100 C after 5 minutes (fire resistant) or 15 minutes (fire-proof) exposure. They shall be rated

10、 at an a.c. voltage of 600 V r.m.s., a frequency of maximum 2 000 Hz and a long term temperature of up to 260 C (ambient temperature plus temperature rise in conductor). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refere

11、nces, 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 tests o

12、n user-applied markings on aircraft electrical cables EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts ISO 2574, Aircraft Electrical cables Identification marking ISO 8815, Aircraft Electrical cables and cable harnesses Vocabulary IEC 60028:19

13、25 , International standard of resistance for copper 3 Definitions and symbols For the purposes of this document, the definitions and symbols given in ISO 8815 and EN 3475-100 apply. 4 Materials and construction 4.1 Conductors 4.1.1 Materials The individual strands used for the conductors shall be c

14、ylindrical and shall be: of nickel clad copper alloy for nominal cross section of 0,4 mm2; of nickel clad copper for nominal sections 0,6 mm2. prEN 2234:2010 (E) 4 The copper shall meet the requirements of IEC 28 and the copper alloy the requirements of this standard. The nickel shall not represent

15、less than 27 % of the total mass of the individual strand. Individual strands shall show the following minimum breaking strength: 280 N/mm2for nickel clad copper; 315 N/mm2for nickel clad copper alloy. 4.1.2 Lay length Up to 9 mm2cross section inclusive (code 090), concentric or unilay conductors ar

16、e 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 areas between 14 mm2and 68 mm2(codes 140 to 680), the conductor comprises concentric or bunched conductors

17、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 concentric (or bunched) conductors, measured over the outer layer of the conductor, shall be between 8 times

18、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 conductors may, however, include soldered or brazed joints. For strands with a diameter of 0,25 mm or greater

19、, 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 deformation of the strands or damage to the plating is not permitted. 4.2 Construction Finished cables The insulation sh

20、all 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 effect and the risk of blistering and heat corrosion due to voids and gaseous discharges. The insulation shall be

21、 neither too tight nor too loose, so as to provide satisfactory mechanical characteristics and be easily removable using commercially available tools. (See 6.45) The protective sheath shall be of a material, which takes on the round shape of the insulated conductor lying under it. It shall provide a

22、dequate protection from mechanical damage and contamination by liquids, as specified in the product standard. The outer surface shall be smooth and suitable for identification marking. The protective sheath shall not have a corrosive effect on the screen and shall be resistant to fungus and other. p

23、rEN 2234:2010 (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 product standard. 6 Tests method See Table 1. Table 1 Tests: methods, application, requirements Tests Each delivery No. Desc

24、ription EN 3475- (and/or particulars) Qualification 1) (Clause 7).aOn all cables (7.2.1 and 7.2.2)Priorto deliverPeriodic every three years (7.2.4) Requirements (and/or particulars) 6 Test conditions 100 X X X X 6.1 Visual examination 201 3 X Product standard 6.2 Mass 202 minimum length 0,5 m 3 X Pr

25、oduct standard 6.3 Dimensions 203 3 X X X Product standard 6.4 Ohmic resistance per unit length 301 3 X Product standard6.5 Voltage proof test: 302 immersion test; 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

26、 3 For 1 km length 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 Overload resistance 305T1 and T2: product standard 3 X Applicable to code 006 only 6.9 Continuity of conductors 306 X X Applicable 6.10 Accelerated ageing 401Mandrel diameter and test load

27、: Table 4 3 X 6.11 Shrinkage and delamination 402 bTemperature: product standard 3 X Product standard continued prEN 2234:2010 (E) 6 Table 1 Tests: methods, application, requirements (continued) Tests Each delivery No. Description EN 3475- (and/or particulars) Qualification (Clause 7.1).aOn all cabl

28、es(7.2.1 and 7.2.2)Prior to deliver Periodic everythree years(7.2.4) Requirements (and/or particulars) 6.12 Delamination and blocking 403 Mandrel diameter: Table 4 Temperature: product standard 3 X Product standard 6.13 Thermal shock 404 Temperature: product standard 3 X Product standard 6.14 Bendin

29、g at ambient temperature 405 Mandrel diameter: Table 4 3 X 6.15 Cold bend test 406 Mandrel diameter and test load: Table 4 Temperature: product standard 3 X Product standard 6.16 Flammability 407 3 X Product standard 6.17 Fire resistance 408 Per fluid tested 1 X Without fluid immersion for tests pri

30、or to delivery. 6.18 Air-excluded ageing 409 Temperature and time: product standard 3 X 6.19 Thermal endurance 410Temperature 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

31、 A or B as requested in product standard 3 X 6.22 Wrap back test 413 3 X Applicable to cables 5 mm26.23 Differential scanning calorimeter (DSC test) 414 3 X 6.24 Rapid change of temperature 415 Not applicable 6.25 Thermal stability 416 Not applicable continued prEN 2234:2010 (E) 7 Table 1 Tests: met

32、hods, application, requirements (continued) Tests Each delivery No. Description EN 3475- (and/or particulars) Qualification(Clause 7.1).aOn all cables(7.2.1 and 7.2.2)Prior to deliver Periodic everythree years(7.2.4) Requirements (and/or particulars) 6.27 Dynamic cut-through 501 Temperature: product

33、 standard 3 X Product standard 6.28 Notch propagation 502 Cut depth: product standard 3 X 6.29 Scrape abrasion 503 Load : product standard 3 X Requirement to be considered at 20 C unless otherwise specified 6.30 Torsion 504 Test load: Table 4 T3 and T4: product standard 3 X Applicable to 5 mm26.31 T

34、ensile test on conductors and strands 505 3 X See 4.1 of this standard. 632 Plating continuity 506 3 X 6.33 Adherence of plating 507 3 X 634 Plating thickness 508 3 X 6.35 Solderability 509 3 X Product standard 6.36 Tensile strength and elongation of extruded insulation, sheath and jacket materials

35、510 4 X Product standard6.37 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 6.40 Smoke density 601 X X Product standard 6.41 Toxicity 602 X X Product standard 6.42

36、Resistance to wet arc tracking and electric arc propagation 603 X X Product standard6.43 Resistance to dry arc tracking and electric arc propagation 604 X X Product standard 6.44 Wet short circuit test 605 X X Product standard 6.45 Strippability and adherence of insulation to the conductor 701 3 X P

37、roduct standardcontinued prEN 2234:2010 (E) 8 Table 1 Tests: methods, application, requirements (concluded) Tests Each delivery No. Description EN 3475- (and/or particulars) Qualification(Clause 7.1).a On all cables(7.2.1 and 7.2.2)Prior to deliver Periodic everythree years(7.2.4) Requirements (and/

38、or particulars) 6.46 Screen pushback capability 702 NOT APPLICABLE 6.47 Permanence of manufacturers marking 703 3 X Product standard 6.48 Flexibility 704 2 X Product standard 6.49 Contrast measurement 705 and EN 3838 X X Product standard 6.50 Laser markability 706 X X Product standard aNumber of spe

39、cimens per cross section for each test unless otherwise specified. 7 Quality assurance 7.1 Qualification 7.1.1 General requirements See EN 9133. 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 u

40、niformly. Each drum, spool or coil shall have a label containing information given in 9.1. 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-a and Table 2-b. prEN 2234:2010 (E) 9 T

41、able 2-a Qualified cables and extension to qualification Single core Qualified cables Cables covered by the same qualification Nominal cross-section AWG a Nominal cross section AWG a mm2mm20,4 22 0,4 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 aClosest

42、 American Wire Gage. For cross-sections 9 mm2 to 68 mm2, different reference cross-section may be selected after agreement with the design authority. Table 2-b Qualified cables and extension to qualification Multicore unshielded Qualified cables Cables covered by the same qualification Nominal cross

43、-section AWG a Number of conductors Nominal cross-section AWG a Number of conductors mm2mm22 0,6 20 2 and 3 0,4 - 0,6 - 1 - 1,2 - 2 22 - 20 - 18 - 16 - 14 aClosest American Wire Gage. 7.2 Acceptance tests 7.2.1 Required conditions 7.2.1.1 General See Table 1. The acceptance tests shall be carried ou

44、t on cables delivered against an order to check that the cable characteristics are maintained. 7.2.1.2 Tests to be carried out on all cables The cables which fail any of the tests specified in 7.2.2 shall be rejected. 7.2.1.3 Random sampling tests: retest If any of the specimen fails one of the test

45、 specified in 7.2.3, that test shall be repeated on another set of specimens of the same cross-section selected at random from the same batch. If one of these new specimens fails the test, the batch submitted for acceptance shall be rejected. prEN 2234:2010 (E) 10 7.2.2 Production routine tests The

46、tests shall be carried out on all cables delivered. See Table 1. 7.2.3 Tests prior to delivery They shall be carried out by sampling on each delivery batch. 7.2.4 Periodic tests They shall be carried out by sampling at least every three years. See Table 1. 8 Identification marking Unless otherwise s

47、pecified, the type, cross-section and a reference for the identification of country of origin, manufacturer, and the year of manufacture shall be indelibly marked on the cables, in accordance with ISO 2574. 9 Packaging, labelling, and delivery lengths 9.1 Packaging and labelling Cables supplied on d

48、rums, spools or in coils shall be wound evenly and uniformly. All cables ends shall be easily accessible and protected where necessary. Each drum, spool or coil shall have a label indicating: manufacturers name and designation; cable designation; batch number; date of manufacture; inspector mark; to

49、tal length and length of each piece of cable in meters from inside to out side. 9.2 Delivery lengths They shall conform to Table 3 and Table 4 unless otherwise specified. prEN 2234:2010 (E) 11 Table 3 Minimum acceptable continuous lengths Nominal cross-section for cables AWG afor at least 85 % of cables delivered for not more than 15 % of cables delivered mm2m m 0,4 to 1 22 to 18 150 30 1,2 to 3 16 to 12 100 20 5 to 14 10 to 6 50 15 22 to 68 4 to 00