ASD-STAN PREN 4674-001-2015 Aerospace series Electrical cables installation Self-wrapping shielding (EMI) protective sleeve Part 001 Technical specification (Edition P 2).pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4674-001 Edition P 2 July 2015 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: 49.060 Supersedes edition P 1

2、 of October 2002 and will supersede EN 4674-001:2015 Descriptors: ENGLISH VERSION Aerospace series Electrical cables, installation Self-wrapping shielding (EMI) protective sleeve Part 001: Technical specification Srie arospatiale Cbles lectriques, installation Gaine de protection blinde (EMI) auto-f

3、ermable Partie 001 : Spcification technique Luft- und Raumfahrt Elektrische Leitungen, Installation Selbstschlieender abschirmender (EMI) Schutzschlauch Teil 001: Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace an

4、d 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 member comments. Subsequent to the publication of this Prestandard, the technical content

5、 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-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee f

6、or 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 and by withdrawing any national standards conflicting with the EN. Edition approved for p

7、ublication 1st July 2015 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2015 by ASD-STAN prEN 4674-001:2015 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Terms, definitions and symbols .4 4 Description .4 5 Design

8、 .5 6 Definition drawings and mass 8 7 Test methods 8 8 Quality assurance . 14 9 Example for designation in product standards . 14 10 Delivery conditions . 14 11 Packaging 14 12 Marking 14 13 Storage . 14 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical

9、 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 4674-001:2015 (E) 3 1 Scope This standard specifies the general characteristics, qualification and acceptance

10、 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 indispensable for the application of this document. For dated references, only the edition

11、 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 between 55 C and 260 C Part 010: DR family, single UV laser printable Product standar

12、d 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 connection Test methods Part 307: Salt mist EN 2825, Aerospace series Burning behaviour of

13、 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 flames Determination of gas components in the smoke EN 3197, Aerospace series Design

14、 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 Part 1: Small burner test, vertical Determination of the vertical flame propagati

15、on 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, installation Self-wrapping shielding (EMI) protective sleeve Part 003: Open sleeve Inside p

16、ressurized 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 Outside pressurized area EMI protection 10 kA Temperature range 65 C to 200 C Produ

17、ct standard EN 6059, Aerospace series Electrical cables, installation Protection sleeves Test methods 1) EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts 1) All its parts quoted in this standard. prEN 4674-001:2015 (E) 4 ISO 8815, Aircraft Ele

18、ctrical cables and cables harnesses Vocabulary IEC 62153-4-3, Metallic communication cable test methods Part 4-3: Electromagnetic compatibility (EMC) Surface transfer impedance Triaxial method 2) ASTM B33, Standard Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes 3)

19、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 Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials 3) TR 4684, Aeros

20、pace series Electrical Technology and component definition 4) 3 Terms, definitions and symbols For the purposes of this standard, the terms, definitions and symbols given in ISO 8815 or TR 4684 apply. 4 Description This technical specification covers tubular self-wrappable sleeving, used as EMI prot

21、ection 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 or group of wires (warps) made of plated copper; the wires or group of wires are assembled by weavin

22、g 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 continuity between longitudinal warps; the internal part can be covered by a tape maintained close t

23、o 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 National (US) American Society for Testing and Materials. http:/www.astm.org/ 4) In preparation at the d

24、ate of publication of this standard. prEN 4674-001:2015 (E) 5 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 requirements These protection sleeves are intended to meet the following requirements as specified in detail in Cla

25、use 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, minimum mass, mechanical flexibility, the minimum bend radius applicable shall be equal to the specified minimum be

26、nd 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 mentioned in the product standard. prEN 4674-001:2015 (E) 6 5.2 Screen requirements 5.2.1 Materials Strands used for this

27、 standard shall be cylindrical and made with high conductivity annealed electrolytic copper (see ASTM B355, ASTM B298, ASTM B33). On ASTM B355 finished product: 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

28、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 individual 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 leas

29、t 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 3475-506 and EN 3475-507. Particular plating thickness will be necessary to provide high resistance to corrosion. For example, a high resistanc

30、e 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 individual 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

31、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 wires using the same number and diameter of strands. Strands forming an individual group of wires shall not be twisted together and shall run

32、 longitudinally as parallel to each other as possible in order to minimize linear resistance, to limit crossover for electrical connection dispersion during installation purpose. When necessary to ensure a good EMI protection, particular care shall be brought to the necessary electrical link between

33、 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. 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 s

34、trand comprising the warps 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 1 m, measured between different strands. prEN 4674-001:2015 (E) 7 5.3 Fibre req

35、uirements 5.3.1 Materials Mono- or multi-filament fibres used for this standard: shall be flame resistant and shall not support combustion; shall be moisture resistant and shall not support fungus growth; shall not be adversely affected by weathering, fluids and propellants absorption; shall not be

36、affected by normal manipulations, temperature and ambient conditions encountered during service life operations. Materials that outgas 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 to

37、gether all wires or group of wires, shall be of a uniform shape and constitution, with a smooth surface and free from knots or other 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 o

38、f wires and cables, unless otherwise specified in product standard, it is recommended to use a mechanical protection of sufficient thickness, 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 approp

39、riate process, such as for example: an adhesive, the sewing process, the weave used to hold the group of wires together. The maintaining process shall be easily removable, to ensure 360 electrical bonding on end-fittings (i.e. backshells, half-shells). 5.5 Installation requirements 5.5.1 Twisting of

40、 the sleeve A twisting of two 360 turns per meter is mandatory for the installation, in order 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. prEN 4674-001:2015 (E) 8 5.5.2 Temperature

41、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 operate. To identify each concerned product, coloured tracer line

42、identification shall be included on the external edge. The tracer line indicating the minimum overlap shall have the same colour as the tracer line on the external edge. To identify each sleeve size, unless otherwise specified in product standard no specific tracer shall be specified. Tracer line ma

43、terials shall be compatible with sleeve temperature range during all the service life. Colours for both tracer lines shall be as given in EN 4674-002 or according to product standard. 5.5.4 Implementation on bundles The help of a simple associated tool is permissible to move apart the two edges. Whe

44、n used, this tool shall not damage the sleeve, its edges or the protective tape (if any), and shall not damage the cables inside the sleeve. 5.5.5 Connecting devices For the long term, efficiency of the EMI protection provided by such sleeve will be maintained only if connecting devices installed ar

45、e duly qualified in the concerned environment. For this we need to take into account dimensional stability of the sleeve in the full range of thermal and vibratory environments. If necessary the product standard can specify particularly recommended connecting devices. 6 Definition drawings and mass

46、Exact description, specific requirements, general dimensions and mass of these sleeves are given in each concerned product standard. 7 Test methods 7.1 Qualification tests 7.1.1 General For each product standard, qualification tests shall be as given in Table 1 and Table 2. prEN 4674-001:2015 (E) 9

47、7.1.2 Standard tests See Table 1. Table 1 Standard test methods for qualification (1 of 3) Test method Designation of the test Details EN 6059-201 Visual inspection Applicable All test specimens (see product standard). EN 6059-202 Dimensions and mass Applicable All test specimens (see product standa

48、rd). EN 6059-203 Coverage Not applicable EN 6059-301 Sun light exposure Applicable Test must be performed on each type of raw-material (tapes, fibres, tracer line) and three samples (medium size) of finished product (duration according to product standard). EN 6059-302 High temperature exposure Appl

49、icable Three samples per size. EN 6059-303 Resistance to fluids Applicable Test must be performed on each type of raw-material (tapes, fibres, tracer line) and three samples (medium size) of finished product. EN 3844-1B Flammability Applicable Three samples of a medium size. Unless otherwise specified in product standard: Extingui