EN 2234-2018 en Aerospace series - Cable electrical fire resistant - Technical specification.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Aerospace series - Cable, electrical, fire resistant - Technical specificationBS EN 2234:2018National forewordThis British Standard is the UK implementation of EN 2234:2018. It supersedes BS EN 2234:2012, which is withd

2、rawn.The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the nece

3、ssary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 99395 4ICS 49.060Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was

4、published under the authority of the Standards Policy and Strategy Committee on 31 May 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 2234:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2234May 2018ICS 49.060 Supersedes EN 2234:2012EUROPEAN COMMITTE

5、E FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN 2234:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersAerospace series - Cab

6、le, electrical, fire resistant - Technical specificationSrie arospatiale - Cbles lectriques rsistant au feu - Spcification techniqueLuft- und Raumfahrt - Elektrische Leitungen, feuerbestndig - Technische LieferbedingungenThis European Standard was approved by CEN on 6 November 2017.CEN members are b

7、ound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the

8、 CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre

9、 has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

10、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN 2234:2018 (E)European forewordThis document (EN 2234:2018) has been prepared by the Aerospace and Defence Industries Association of E

11、urope - Standardization (ASD-STAN).After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN.This European Sta

12、ndard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2018, and conflicting national standards shall be withdrawn at the latest by November 2018.Attention is drawn to the possibility that some of the elements o

13、f this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 2234:2012.According to the CEN CENELEC Internal Regulations, the national standards organizations of the following countries are bound to i

14、mplement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roma

15、nia, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.2BS EN 2234:2018EN 2234:2018 (E)European foreword 2European foreword 41 Scope . 52 Normative references 53 Terms, definitions and symbols 54 Materials and construction . 54.1 Conductors . 54.1.1 Materials . 54

16、.1.2 Lay length . 64.1.3 Joints . 64.1.4 Compaction . 64.2 Construction 65 Required characteristics 66 Tests method . 77 Quality assurance .117.1 Qualification . 117.1.1 General requirements .117.1.2 Qualification conditions 117.1.3 Qualification tests 117.1.4 Extension of qualification . 117.2 Acce

17、ptance tests . 127.2.1 Required conditions .127.2.2 Production routine tests. 127.2.3 Tests prior to delivery 127.2.4 Periodic tests 127.2.5 First article inspection tests 128 Identification marking 129 Packaging, labelling and delivery lengths .129.1 Packaging and labelling 129.2 Delivery lengths 1

18、33Contents PageBS EN 2234:2018EN 2234:2018 (E)European forewordThis document (EN 2234:2018) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN).After enquiries and votes carried out in accordance with the rules of this Association, this Standa

19、rd has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by

20、 November 2018, and conflicting national standards shall be withdrawn at the latest by November 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.T

21、his document supersedes EN 2234:2012.According to the CEN CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugosl

22、av Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.4BS EN 2234:2018EN 2234:2018 (E)1 ScopeThis

23、 document 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 resistan

24、t) 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) and 2

25、00 V rms (phase to phase) and a long term temperature of up to 260 C (ambient temperature plus temperature rise in conductor).2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated

26、 references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.EN 3475100, (all parts), Aerospace series Cables, electrical, aircraft use Test methods Part 100: GeneralEN 3838, Aerospace series Requirements and te

27、sts on user-applied markings on aircraft electrical cablesEN 9102, Aerospace series Quality systems First article inspectionEN 9133, Aerospace series Quality Management Systems Qualification Procedure for Aerospace Standard ProductsISO 2574, Aircraft Electrical cables Identification markingISO 8815,

28、 Aircraft Electrical cables and cable harnesses VocabularyIEC 60028:1925, International standard of resistance for copper3 Terms, definitions and symbolsFor the purposes of this document, the terms, definitions and symbols given in ISO 8815 and EN 3475100 apply.ISO and IEC maintain terminological da

29、tabases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 Materials and construction4.1 Conductors4.1.1 MaterialsThe individual strands used for the conductors shall be c

30、ylindrical and shall be: of nickel clad copper alloy for nominal cross section of 0,25 mm2and 0,4 mm2; of nickel clad copper for nominal sections 0,6 mm2.The copper shall meet the requirements of IEC 60028 and the copper alloy the requirements of this standard.5BS EN 2234:2018EN 2234:2018 (E)The nic

31、kel 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/mm2for nickel clad copper; 315 N/mm2for nickel clad copper alloy.4.1.2 Lay lengthUp to 9 mm2cross section inclusive (code 090), concentric or

32、 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 areas between 14 mm2and 68 mm2(codes 140 to 680), the conductor comprises concentric or

33、 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 concentric (or bunched) conductors, measured over the outer layer of the conductor, shall

34、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 JointsThe 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,

35、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 CompactionCompaction of the causing deformation of the strands or damage to the plating is not permitted.4.2 ConstructionFinished cablesThe ins

36、ulation 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 effect and the risk of blistering and heat corrosion due to voids and gaseous discharges.The insulation

37、 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 sheath shall be of a material, which takes on the round shape of the insulated conductor lying under it.

38、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 marking.The protective sheath shall not have a corrosive effect on the screen and shall be resistant to fu

39、ngus and other.5 Required characteristicsThe characteristics of the cables, tested according to the methods described hereafter shall comply with the values given in the product standard.6 BS EN 2234:2018EN 2234:2018 (E)6 Tests methodSee Table 1.Table 1 Tests: methods, application, requirements No.T

40、estsRequirements (and/or particulars)DescriptionEN 3475- (and/or particulars)Qualification a(see 7.1).First article inspection (see 7.2.5)Each deliveryPeriodic every three years (7.2.4)On all cables (7.2.1 and 7.2.2)Prior to delivery (7.2.3)6 Test conditions 100 X X X X X 6.1 Visual examination 201

41、3 3 X Product standard6.2 Mass 202minimum length 0,5 m3 3 X Product standard6.3 Dimensions 203 3 3 X X X Product standard6.4 Ohmic resistance per unit length301 3 3 X Product standard6.1.5 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.Alterna

42、tive to dry testX 8 KV peak voltage6.6 Insulation resistance 303 3 3 For a length of 1 km: at (20 2) C; X 500 M at (95 2) C. X 1 M6.7 Surface resistance 304 3 Minimum: 1 250 m mm6.8 Overload resistance 305T1and T2: product standard3 X Applicable to code 006 only6.9 Continuity of conductors306 X X X

43、7BS EN 2234:2018EN 2234:2018 (E) No.TestsRequirements (and/or particulars)DescriptionEN 3475- (and/or particulars)Qualification a(see 7.1).First article inspection (see 7.2.5)Each deliveryPeriodic every three years (7.2.4)On all cables (7.2.1 and 7.2.2)Prior to delivery (7.2.3)6.10 Accelerated agein

44、g 401Mandrel diameter and test load: Table 53 3 X 6.11 Shrinkage and delamination402Temperature: product standard3 3 X Product standard6.12 Delamination and blocking403Mandrel diameter: Table 5Temperature: product standard3 3 X Product standard6.13 Thermal shock 404Temperature: product standard3 3 X

45、 Product standard6.14 Bending at ambient temperature405Mandrel diameter: Table 53 X 6.15 Cold bend test 406Mandrel diameter and test load: Table 5Temperature: product standard3 3 X Product standard6.16 Flammability 407 3 X Product standard6.17 Fire resistance 408Per fluid tested1 X X Without fluid i

46、mmersion for tests prior to delivery.6.18 Airexcluded ageing 409Temperature and time: product standard3 X 8 BS EN 2234:2018EN 2234:2018 (E) No.TestsRequirements (and/or particulars)DescriptionEN 3475- (and/or particulars)Qualification a(see 7.1).First article inspection (see 7.2.5)Each deliveryPerio

47、dic every three years (7.2.4)On all cables (7.2.1 and 7.2.2)Prior to delivery (7.2.3)6.19 Thermal endurance 410Temperature and time: product standardX Product standardApplicable to code 006 only.4 10 samples6.20 Resistance to fluids 411Per fluid tested1 X 6.21 Humidity resistance 412Method A or B as

48、 requested in product standard3 X 6.22 Wrap back test 413 3 3 X Applicable to cables 5 mm26.23 Differential scanning calorimeter (DSC test)414 3 3 X 6.24 Rapid change of temperature415 Not applicable6.25 Thermal stability 416 Not applicable6.26 Fire resistance of cable inside shielded harness417 X P

49、roduct standard6.27 Dynamic cutthrough 501Temperature: product standard3 3 X Product standard6.28 Notch propagation 502Cut depth: product standard3 3 X 6.29 Scrape abrasion 503Load : product standard3 3 X Requirement to be considered at 20 C unless otherwise specified6.30 Torsion 504Test load: Table 5T3and T4: product standard3 X Applicable to 5 mm29BS EN 2234:2018EN 2234:2018 (E) No.TestsRequirements (and/or particulars)DescriptionEN 3475