ASD-STAN PREN 4199-003-2012 Aerospace series Bonding straps for aircraft Part 003 Bonding strap assemblies with flat braided conductor copper tin plated - 65 up to 150 and copper n.pdf

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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4199-003 Edition P 2 June 2012 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 Edition P1

2、 of October 2007 and will supersede EN 4199-003:2009Descriptors: ENGLISH VERSION Aerospace series Bonding straps for aircraft Part 003: Bonding strap assemblies with flat braided conductor copper, tin plated 65 C up to 150 C and copper, nickel plated 65 C up to 260 C Product standard Srie arospatial

3、e Tresses de mtallisation pour avion Partie 003 : Tresses assembles conducteur plat pour utilisation de 65 C 150 C en cuivre tam et de 65 C 260 C en cuivre nickel Norme de produit Luft- und Raumfahrt Masseverbinder fr Luftfahrzeuge Teil 003: Masseverbinder, konfektioniert, flache Geflechtleiter Kupf

4、er, verzinnt 65 C bis 150 C und Kupfer, vernickelt 65 C bis 260 C Produktnorm 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 Aeros

5、pace 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 shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-ide

6、ntification 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 for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members ha

7、ve 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 publication 30 June 2012 Comments should be sent within six months after the date of publication to ASD-STAN Electr

8、ical Domain Copyright 2012 by ASD-STAN prEN 4199-003:2012 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Terms and definitions .3 4 Characteristics .3 5 Dimensions, mass and resistance .4 6 Quality assurance 6 7 Designation 7 8 Marking .7 9 Packaging .7 Foreword This standard wa

9、s 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 4199-003:2012 (E) 3 1 Scope This standa

10、rd defines the characteristics of bonding straps with flat braided copper conductors tin or nickel plated and terminal lugs tin or nickel plated, crimped on both ends for use on aircraft. This standard shall be used together with EN 4199-001. 2 Normative references The following referenced documents

11、 are indispensable 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 2424, Aerospace series Marking of aerospace products EN 3373-001, Aerospace seri

12、es Terminal lugs and in-line splices for crimping on electric conductors Part 001: Technical specification EN 4199-001, Aerospace series Bonding straps for aircraft Part 001: Technical specification EN 4199-005, Aerospace series Bonding straps for aircraft Part 005: Flat braid conductors copper, tin

13、 plated 65 C up to 150 C and copper, nickel plated 65 C up to 260 C Product standard3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 4199-001 apply. 4 Characteristics 4.1 Temperature rating Flat braid copper conductors for bonding straps. Tin plated co

14、pper braid conductor and tin plated copper terminal lugs 65 C up to 150 C. Nickel plated copper braid conductor and nickel plated copper terminal lugs 65 C up to 260 C. 4.2 Material and finish For flat braid copper conductor, see EN 4199-005. Flat braid copper conductor and terminal lugs shall have

15、the same finish. The finish shall be either tin or nickel using the designation T or N. See designation in Clause 7. 4.3 Length restrictions For the electrical bonding of structural elements likely to conduct lightening, braids longer than 220 mm are not generally approved and should not be used wit

16、hout the prior consent of the departments dealing with system studies and standardisation. prEN 4199-003:2012 (E) 4 When using bonding straps on equipment or installations generating or processing frequencies greater than 100 kHz, care shall be taken not to exceed a length to width ratio of 5 to 1 f

17、or reasons of electromagnetic compatibility. 4.4 Cross sectional area The nominal cross sectional area, plus the associated test currents and tensile strength requirements of the straps shall be in accordance with Table 1. Test currents and tensile strength figures are derived from EN 3373-001 Table

18、 2. Table 1 Cross sectional area Cross section code Nominal braid cross sectional area Test current Tensile strength lug to lug mm2Amps N A 04 50 600 B 06 60 800 C 10 80 1 200 D 16 110 1 700 E 25 150 2 200 5 Dimensions, mass and resistance 5.1 General Dimensions and tolerances are in millimetres. Fo

19、r length L and tolerances, see 5.2. For nominal braid width, see Table 3 and EN 4199-005. For mass and resistance, see Table 3. For d max. see Table 2. Figure 1 prEN 4199-003:2012 (E) 5 5.2 Length Length shall be defined as the measurement between terminal hole centres as shown in Figure 1. Standard

20、 lengths shall be called up in multiples of 25 mm. Preferred lengths shall range from 50 mm up to 300 mm. Longer, non-preferred lengths are allowable as long as they are approved by the relevant design authority. A three or four digit length code is to be entered into the designation (see Clause 7).

21、 The following standard tolerances to length shall apply: 05mm for lengths up to 100 mm; 010mm for lengths 125 mm to 975 mm; 025mm for lengths of 1 000 mm and above. Nominal resistance and mass values for straps of 100 mm length are shown in Table 3. 5.3 Terminal selection Terminal variant availabil

22、ity is in accordance with Table 2. Only aerospace approved terminals shall be used. Table 2 Terminal selection Cross sectional area Terminal availability Terminal variant code Stud/Hole size Hole mm 4 6 10 16 25 A No. 8 4,34 X X X B No. 10 5,00 X X C 1/4 6,73 X D 5/16 8,33 X E 3/8 9,91 X X X Termina

23、l barrel size AWG 12/10 8 6 4 2 d max. (see Figure 1) mm 13,8 14,6 16,2 16,2 16,2 prEN 4199-003:2012 (E) 6 5.4 Mass and resistance See Table 3. Table 3 Mass and resistance Braid x-section Nominal braid width Nominal resistance 100 mm strap Braid resistance Nominal mass 100 mm strap Braid mass mm2mm

24、m m per 25 mm g g per 25 mm 4 8,2 0,4 0,112 6,3 1,1 6 10,0 0,24 0,075 10,7 1,63 10 14,0 0,14 0,046 18,4 2,9 16 17,5 0,09 0,03 28,9 3,93 25 21,0 0,06 0,015 43,2 7,85The figures shown in Table 3 are for nickel plated straps. For tin plated straps, resistance figures will be slightly lower. Mass figure

25、s will be comparable. For lengths other than 100m m, nominal resistance and mass can be calculated by adding or subtracting multiples of the 25 mm braid figures quoted in Table 3. EXAMPLE 1 Resistance for a 10 mm2. 250 mm long strap 0,14 m (6 0,046) m 0,416 m total nominal resistance. EXAMPLE 2 Mass

26、 for a 4 mm2. 50 mm long strap 6,3 g 1,1 g 5,2 g total nominal mass. For maximum figures, an additional 10 % should be applied to the nominal values. Nominal values of mass are based on the use of typical terminals for each x-sectional area. 6 Quality assurance 6.1 Qualification See EN 4199-001, 7.2

27、. Number of cycles for mechanical fatigue shall be 50 000 cycles. 6.2 Acceptance Tests See EN 4199-001, 7.4, Table 7. Test currents shall be in accordance with Table 1 above. Resistance and mass shall be in accordance with Table 3 above. Resistance is calculated from the millivolt drop readings meas

28、ured from terminal palm to terminal palm using the method specified in EN 4199-001, see 6.3. All measurements shall be taken at an ambient temperature of (20 5) C. prEN 4199-003:2012 (E) 7 7 Designation EXAMPLE Description block STRAP BONDING Identity block EN4199-003-X-XXX-XX-X Number of this stand

29、ard Cross sectional area code (see Table 1) Length code in mm (I.E. 125) (In multiples of 25 mm. Four digits to be used if length exceeds 975 mm, see 5.2) Terminal variant code end 1 and 2 (see Table 2) Finish T tin / N nickel NOTE If necessary, the code I9005 shall be placed between the description

30、 block and the identity block. 8 Marking The marking of the bonding strap by label on the packaging shall include: the designation as defined in this product standard; date of manufacture; the manufacturers name or monogram in accordance with EN 2424 style F. 9 Packaging Bonding straps shall be packed so as to avoid any damage.