1、BS EN 4674-001:2017Aerospace series Electrical cables, installation Self-wrapping shielding (EMI) protective sleevePart 001: Technical specificationBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 4674-001:2017 BRITISH STANDARDNational forewordThis British Stand
2、ard is the UK implementation of EN 4674-001:2017. It supersedes BS EN 4674-001:2015 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.A list of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
3、 be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 96015 4 ICS 49.060 Complia
4、nce with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 4674-001:2017EUROPEAN STAN
5、DARD NORME EUROPENNE EUROPISCHE NORM EN 4674-001 March 2017 ICS 49.060 Supersedes EN 4674-001:2015English Version Aerospace series - Electrical cables, installation - Self-wrapping shielding (EMI) protective sleeve - Part 001: Technical specification Srie arospatiale - Cbles lectriques, installation
6、 - Gaine de protection blinde (EMI) auto-fermable - Partie 001 : Spcification technique Luft- und Raumfahrt - Elektrische Leitungen, Installation - Selbstschlieender abschirmender (EMI) Schutzschlauch - Teil 001: Technische Lieferbedingungen This European Standard was approved by CEN on 2 January 20
7、17. CEN members are bound 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
8、on application to the 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-CEN
9、ELEC Management Centre 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, Ita
10、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Cen
11、tre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4674-001:2017 EBS EN 4674-001:2017EN 4674-001:2017 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms, de
12、finitions and symbols . 5 4 Description 5 5 Design 6 6 Definition drawings and mass 9 7 Test methods . 10 8 Quality assurance . 16 9 Example for designation in product standards . 16 10 Delivery conditions . 16 11 Packaging 16 12 Marking 16 13 Storage . 16 BS EN 4674-001:2017EN 4674-001:2017 (E) 3 E
13、uropean foreword This document (EN 4674-001:2017) 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 Standard has received the approval of the Natio
14、nal 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 September 2017, and conflicting nationa
15、l standards shall be withdrawn at the latest by September 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersed
16、es EN 4674-001:2015. 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 Yugoslav Republic of M
17、acedonia, 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. BS EN 4674-001:2017EN 4674-001:2017 (E) 4 1 Scope This Eur
18、opean Standard specifies the general characteristics, qualification and acceptance requirements for self-wrapping shielding (EMI) protective sleeve designed for EMI shielding of cable and cable bundles for aerospace applications. 2 Normative references The following referenced documents are indispen
19、sable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2267-010, Aerospace series Cables, electrical, for general purpose Operating temperatures bet
20、ween 55 C and 260 C Part 010: DR family, single UV laser printable Product standard EN 2591-214, Aerospace series Elements of electrical and optical connection Test methods Part 214: Lightning strike, current and voltage pulse EN 2591-307, Aerospace series Elements of electrical and optical connecti
21、on Test methods Part 307: Salt mist EN 2825, Aerospace series Burning behaviour of non metallic materials under the influence of radiating heat and flames Determination of smoke density EN 2826, Aerospace series Burning behaviour of non metallic materials under the influence of radiating heat and fl
22、ames Determination of gas components in the smoke EN 3197, Aerospace series Design and installation of aircraft electrical and optical interconnection systems EN 3475, Aerospace series Cables, electrical, aircraft use Test methods 1)EN 3844-1, Aerospace series Flammability of non metallic materials
23、Part 1: Small burner test, vertical Determination of the vertical flame propagation EN 4674-002, Aerospace series Electrical cables, installation Self-wrapping shielding (EMI) protective sleeve Part 002: General and list of product standard EN 4674-003, Aerospace series Electrical cables, installati
24、on Self-wrapping shielding (EMI) protective sleeve Part 003: Open sleeve Inside pressurized area EMI protection 5 kA Temperature range 65 C to 200 C Product standard EN 4674-004, Aerospace series Electrical cables, installation Self-wrapping shielding (EMI) protective sleeve Part 004: Open sleeve Ou
25、tside pressurized area EMI protection 10 kA Temperature range 65 C to 200 C Product standard 1) All its parts quoted in this European Standard. BS EN 4674-001:2017EN 4674-001:2017 (E) 5 EN 6059, Aerospace series Electrical cables, installation Protection sleeves Test methods 1)EN 9133, Aerospace ser
26、ies Quality management systems Qualification procedure for aerospace standard parts ISO 8815, Aircraft Electrical cables and cables harnesses Vocabulary IEC 62153-4-3, Metallic communication cable test methods Part 4-3: Electromagnetic compatibility (EMC) Surface transfer impedance Triaxial method2)
27、ASTM B33, Standard Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes 3)ASTM B298, Standard Specification for Silver-Coated Soft or Annealed Copper Wire 3)ASTM B355, Standard Specification for Nickel-Coated Soft or Annealed Copper Wire 3)ASTM D4894, Standard Specificat
28、ion for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials 3)TR 4684, Aerospace series Electrical technology and component definition 4)3 Terms, definitions and symbols For the purposes of this document, the terms, definitions and symbols given in ISO 8815 or TR 4684 apply.
29、4 Description This technical specification covers tubular self-wrappable sleeving, used as EMI protection of different levels. It can be used in pressurized or non-pressurized areas. Easy installation and removal are expected. These sleeves are built with: a particular number of longitudinal wires o
30、r group of wires (warps) made of plated copper; the wires or group of wires are assembled by weaving mono- and/or multi-filament strands which have aerospace grade mechanical and thermal characteristics; optional, transversal-filling strands made of plated copper can be added to provide electrical c
31、ontinuity between longitudinal warps; the internal part can be covered by a tape maintained close to the EMI screen, in order to improve the protection of the cables and cable bundle inside. 2) Published by: IEC International Electrotechnical Commission. http:/www.iec.ch/ 3) Published by: ASTM Natio
32、nal (US) American Society for Testing and Materials. http:/www.astm.org/ 4) In preparation at the date of publication of this standard. BS EN 4674-001:2017EN 4674-001:2017 (E) 6 A sleeve overlap is needed. See Figures 1 and 2 for illustration. Figure 1 Key 1 warp 2 weft Figure 2 5 Design 5.1 General
33、 requirements These protection sleeves are intended to meet the following requirements as specified in detail in Clause 7: EMI protection of cables and cable bundles, non-aggressive to the protected cables and cable bundles, resistance to hostile environments, such as temperature and fluid exposure,
34、 minimum mass, mechanical flexibility, the minimum bend radius applicable shall be equal to the specified minimum bend radius for cables and cable bundles, as specified in EN 3197 or in the product standard, the flammability, smoke emission and toxicity of all parts shall meet the requirements menti
35、oned in the product standard. BS EN 4674-001:2017EN 4674-001:2017 (E) 7 5.2 Screen requirements 5.2.1 Materials Strands used for this European Standard shall be cylindrical and made with high conductivity annealed electrolytic copper (see ASTM B355, ASTM B298, ASTM B33). On ASTM B355 finished produc
36、t: the elongation prior to rupture, for each class 4 and class 10 copper strand, shall be at least 15 %; the elongation prior to rupture, for each class 27 copper strand, shall be at least 8 %; the tensile strength, for each copper strand, shall be at least 220 MPa. 5.2.2 Metal plating The individua
37、l strands may be: provided with a uniform plating of tin (code B) or silver (code C), or nickel (code D). Plating thicknesses shall be at least 1,0 m for silver and at least 1,3 m for nickel. When tin plating is authorized, the thickness shall be sufficient to comply with the tests specified in EN 3
38、475-506 and EN 3475-507. Particular plating thickness will be necessary to provide high resistance to corrosion. For example, a high resistance to corrosion can be obtained with the use of nickel coated copper strands where the nickel shall not represent less than 27 % of the total mass of the indiv
39、idual strand (also called class 27 or class C27). In this case, the tensile strength for each strand shall be at least 280 MPa. Refer to ASTM B355. 5.2.3 Construction of warps All wires or group of wires used to build a particular size shall be of the same cross-section, and if inserted as groups of
40、 wires using the same number and diameter of strands. Strands forming an individual group of wires shall not be twisted together and shall run longitudinally as parallel to each other as possible in order to minimize linear resistance, to limit crossover for electrical connection dispersion during i
41、nstallation purpose. When necessary to ensure a good EMI protection, particular care shall be brought to the necessary electrical link between all warps of a size. Per sleeve size, the total cross-section shall be sufficient to satisfy the required transfer impedance in the full range of frequencies
42、. BS EN 4674-001:2017EN 4674-001:2017 (E) 8 5.2.4 Joints Unless specific validation of the process used, the warps making the final assembly shall be free from any total joints. Each strand comprising the warps may, however, include soldered or brazed joints. For strands with a diameter of 0,25 mm o
43、r greater, butt joints shall be used. The distance between two joints in individual strands shall exceed 1 m, measured between different strands. 5.3 Fibre requirements 5.3.1 Materials Mono- or multi-filament fibres used for this European Standard: shall be flame resistant and shall not support comb
44、ustion; shall be moisture resistant and shall not support fungus growth; shall not be adversely affected by weathering, fluids and propellants absorption; shall not be affected by normal manipulations, temperature and ambient conditions encountered during service life operations. Materials that outg
45、as only a minimum amount of noxious gases shall be selected. Colour shall be as given in EN 4674-002. 5.3.2 Construction Mono- or multi-filament fibres, used to hold together all wires or group of wires, shall be of a uniform shape and constitution, with a smooth surface and free from knots or other
46、 defects that might affect the service life. 5.4 Protective tape requirements 5.4.1 Materials Taking into account insulation materials used for the current generation of wires and cables, unless otherwise specified in product standard, it is recommended to use a mechanical protection of sufficient t
47、hickness, according to ASTM D4894, type IV, grade 2 specification. 5.4.2 Construction The protective tape shall be maintained adjacent to the EMI screen using an appropriate process, such as for example: an adhesive, the sewing process, the weave used to hold the group of wires together. The maintai
48、ning process shall be easily removable, to ensure 360 electrical bonding on end-fittings (i.e. backshells, half-shells). BS EN 4674-001:2017EN 4674-001:2017 (E) 9 5.5 Installation requirements 5.5.1 Twisting of the sleeve A twisting of two 360 turns per meter is mandatory for the installation, in or
49、der to avoid the opening of the sleeve or the exit of any cable (e.g. in bend radius). The product must fulfil all the requirements after the two 360 turns per metre. 5.5.2 Temperature range Each product standard shall define the applicable temperature range. 5.5.3 Identification A tracer line shall be included to indicate the minimum overlap, defining the maximum admissible bundle diameter for which the sleeve can
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