1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 15 November 2003 prEN 4434 Edition P 2 November 2003 Comments should be sent within six months after the date of publication to Electrical Domain AECMA-STAN ICs: 49.060 Descriptors: ENGLISH VERSION Aerospace series Copper or copp
2、er alloy lightweight conductors for electrical cables Product standard (Normal and tight tolerances) Supersedes edition P 1 December 1999 Srie arospatiale Luft- und Raumfahrt Norme de produit Produktnorm Conducteurs tolrances rduites en cuivre ou alliage de cuivre pour cbles lectriques (Tolrances no
3、rmales et rduites) Leichter Leiter aus Kupfer oder Kupferlegierung fr elektrische Leitungen (Normale und enge Toleranzen) This “Aerospace Series“ frestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published
4、 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 pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physi
5、cally or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-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 Sta
6、ndard (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. I I Copytight 2003 O by AECMA-STA1 Page 2 prEN 4434:2003 Foreword This standard was reviewed by t
7、he Domain Technical Coordinator of AECMA-STANS Electrical Domain . After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA- STANS General Process Manual. this standard has received approval for Publication . Contents Page 1 Scope 3 2 Normative references . 3
8、 3 Definitions and symbols . 3 . 4 4.1 4.2 4.3 4.4 4.5 5 5.1 5.2 6 7 8 Conductor materials and construction Materials . Metal plating Electrolytic copper . Copper alloy Construction of conductors . Required characteristics Normal tolerances . Tight tolerances . Test methods . Designation Marking, pa
9、ckaging and delivery lengths . 3 3 4 4 4 4 5 5 6 6 6 7 Page 3 prEN 4434:2003 1 Scope This standard specifies the dimensions, linear resistance, mechanical characteristics, construction and mass of lightweight conductors, normal and tight tolerances, in copper or copper alloy for electrical cables fo
10、r aerospace applications. It applies to stranded conductors, with a nominal cross-sectional area of 0,15 mm2 to 14 mm2 inclusive. The conductors for thermocouple extension and fire-resistant cables are not covered by this standard. 2 Normative references This European Standard incorporates by dated
11、or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only
12、 when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IEC 60028 (1925-OI), IEC 60344 (1980-OI), EN 2083, EN 3475-100, EN 3475-301, EN 3475-506, EN 3475-507, International standard of resistance for copper Guide to the cal
13、culation of resistance of plain and coated copper conductors of low- frequency cables and wires Aerospace series - Copper or copper alloy conductors for electrical cables - Product standard Aerospace series - Cables, electrical, aircraff use - Test methods - Part 100: General Aerospace series - Cabl
14、es, electrical, aircraff use - Test methods - Part 301: Ohmic resistance per unit length Aerospace series - Cables, electrical, aircraff use - Test methods - Part 506: Plating continuity Aerospace series - Cables, electrical, aircraff use - Test methods - Part 507: Adherence of plating 3 Definitions
15、 and symbols For the purposes of this standard, the definitions and symbols given in EN 3475-100 for conductors apply. 4 Conductor materials and construction 4.1 Materials Conductors complying with this standard are made from strands in high conductivity annealed electrolytic copper (see IEC 60028)
16、or copper alloy. The conductors for nominal cross-sectional areas 0,15 mm2 and 0,25 mm2 shall be made from copper alloy. Page 4 prEN 4434:2003 4.2 Metal plating The individual strands may be: - uncoated (code A); - or provided with uniform platings of tin (code B) or silver (code C) or nickel (code
17、D). Plating thicknesses shall be at least 1 ,O pm for silver and at least 1,3 pm 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. 4.3 Electrolytic copper The elongation prior to rupture, for each copper s
18、trand, shall not be less than 10 %. The tensile strengh, for each copper strand, shall be at least 220 MPa. 4.4 Copper alloy For cross-sectional areas 0,15 mm2 and 0,25 mm2 in copper alloy, use an alloy with the following characteristics: - maximum resistivity: 2,46 x 10-8 Q . m I); - minimum tensil
19、e strength: 350 MPa; - minimum elongation: 6 %. 4.5 Construction of conductors 4.5.1 Lay length Up to 9 mm2 cross-section inclusive (code 090), concentric conductors are used. The lay for the strands of a concentric conductor, checked over the outside layer of a test piece 1 m long, shall be between
20、 eight times and 16 times the maximum diameter of this conductor. For sectional area of 14 mm2 (code 140), the conductor comprises concentric or 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 co
21、ncentric or bunched conductor in question. The lay for concentric (or bunched) conductors, measured over the outer layer of the conductor, shall be between eight times and 16 times the maximum conductor diameter. In all cases the lay of the outer layer shall be left-hand. 4.5.2 Joints The conductors
22、 shall be free from any joints. Each strand cornpricing the conductors 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 3 m, measured between different str
23、ands. 4.5.3 Compaction Compaction of the conductor, causing deformation of the strands or damage to the plating, is not permitted. 1) or 24,6 !2 . rnrn*/krn Page 5 prEN 4434:2003 Diameter of conductor a mm 5 Table 1 defines normal tolerances , Table 2 defines tight tolerances of ligthweight conducto
24、rs If nothing mentionned in the product standard, normal tolerances shall be applied. Req u i red characteristics Linear resistance Breaking Mass max. at 20 “C load of conductor Qlkm N kglkm a 5.1 Normal tolerances AWG See Table 1. Number of missing strands - Code - O0 1 002 004 006 o1 o o1 2 020 03
25、0 050 05 1 O90 140 - 0,15 0,25 0,40 0,60 1 1,20 2 3 5 5 9 14 Number of strands Nominal section m m2 19 19 19 19 19 19 37 37 37 61 127 27x7 26 24 22 20 18 16 14 12 10 10 8 6 Nominal jiameter of strands mm O O O O O O O O O O O O 0,lO 0,12 0,15 0,20 0,25 0,30 0,25 0,32 0,40 0,32 0,30 0,30 min. 0,45 0,
26、55 0,70 0,94 1,18 1,39 1,68 2,12 2,69 2,72 - - max. 0,49 0,60 0,75 1 ,o0 1,25 1,50 1,75 2,20 2,82 2,83 4,20 5,40 A and C 149 106 55,3 31 ,O 19,6 13,6 10,2 6,4 3,9 2,l 1,44 4,o Band DI min. I min. 160 e 114 e 60 33,2 21 ,I 14,5 10,9 6,8 42 4,l 2,3 1,58 46 67 71 127 198 285 385 645 1 O00 1 O00 - - 1,2
27、0 1,77 2,83 5,15 8,16 11,63 16,02 26,06 41,23 43,25 76 114 max. 1,40 2,oo 3,26 5,70 8,90 12,50 17,30 27,50 44,OO 45,80 85 126 a Values for minimum diameter and minimum weight are the same as in EN 2083 to allow the use of existing tooling (stripping and crimping) The linear resistance at other tempe
28、ratures may be calculated using the formulae given in EN 3475-301. Not taking into consideration metal platings, assuming that their effect is minimal. AWG: closest American Wire Gage Not available as code letter B This gives a more flexible construction which may be used as an alternative. Codes O9
29、0 and 140: Linear resistance calculated in accordance with the procedure in IEC 60344; where: ki is 1,04 (A and C) and 1,145 (B and D); k2 is 1 ,O4 (code 090) and 1 ,O2 (codes 2 140); k3 is 1 (code 090) and 1 ,O5 (codes 2 140). e Page 6 prEN 4434:2003 Description block 5.2 Tight tolerances Identity
30、block See Table 2. :- Number of this standard C = Material code for plating (see 4.2) Code for nominal cross-sectional area (see Table 1) T : for tight tolerances B / blank for normal tolerances Table 2 - Code - O0 1 002 004 006 o1 o o1 2 020 030 05 1 O90 140 - rlominal liametei of strands mm Diamet
31、er of conductor mm Linear resistance max. at 20 “C a Qlkm 3reakinc load N min. Mass of conductor kglkm lumber of missing strands Number of strands Nominal section m m2 AWG max. 3 and D max. min. 9 and C min. 0,15 0,25 0,40 0,60 1 1,20 2 3 5 ge 14 e 19 19 19 19 19 19 37 37 61 127 27 x 7 0,lO 0,12 0,1
32、5 0,20 0,25 0,30 0,25 0,32 0,32 0,30 0,30 0,47 0,555 0,71 0,94 1,19 1,41 1,69 2,13 2,73 3,55 48 0,49 0,585 0,73 0,97 1,22 1,45 1,73 2,18 2,77 3,85 5,20 149 106 55,3 31 ,O 19,6 13,6 10,2 6,4 3,9 2,l 1,44 160 114 60 33,2 21 ,I 14,5 10,9 6,8 4,l 2,3 1,58 46 67 71 127 198 285 385 645 1 O00 - - 1,20 1,77
33、 2,83 5,15 8,16 11,63 16,02 26,06 43,25 76 114 1,40 24 3,26 5,70 8,90 12,50 17,30 27,50 45,8 85 126 26 24 22 20 18 16 14 12 10 8 6 O O O O O O O O O O O a The linear resistance at other temperatures may be calculated using the formulae given in EN 3475-301. Not taking into consideration metal platin
34、gs, assuming that their effect is minimal. AWG: closest American Wire Gage Not available as code letter B Linear resistance calculated in accordance with the procedure in IEC 60344; where: ki is 1,04 (A and C) and 1,145 (B and D); k2 is 1,04 (code 090) and 1 ,O2 (codes t 140); k3 is 1 (code 090) and
35、 1 ,O5 (codes t 140). e Codes O90 and 140: 6 Test methods See EN 3475-100. Page 7 prEN 4434:2003 8 Marking, packaging and delivery lengths On delivery the identification reference shall be completed by the length, date and inspection mark. The conductors shall be delivered on spools or reels. They shall be wound in a regular and uniform manner and require an appropriate protection, not affecting the product delivered. Each unit delivered may contain one or several lengths as specified by the purchaser.
