1、STDaAECMA PREN 3355-012-ENGL 2000 U 301231L 0038334 i99 m Edition approved for publication 2000-05-31 AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months C2 Chairman after the date of publication to AECMA Guiledelle 94 Mr Peuetta B-1200 BRUXELLES prEN 31 55-012 Edition P
2、2 May 2000 ICs: 49.060 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 6-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 Supersedes edition P 1 March 1993 Descriptors: Aerospace industry, aircraft equipment, element of electrical connection, ele
3、ctrical contact, characteristic, marking ENGLISH VERSION Aerospace series Electrical contacts used in elements of connection Part O1 2: Contacts, electrical, triaxial, size 8, male, type D, solder, class R Product standard Srie arospatiale Luft- und Raumfahrt Contacts lectriques utiliss dans les org
4、anes de connexion Partie 012: Contacts lectriques triaxiaux, taille 8, mles, type D, souder, classe R Elektrische Kontakte zur Verwendung in Verbindungselementen Teil O1 2: Elektrische triaxiale Stiftkontakte, Gre 8, Typ D, zum Lten, Klasse R Norme de produit Produ ktnorm This “Aerospace Series“ Pre
5、standard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA- Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countr
6、ies. 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-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and
7、formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. aecrna 201 STD.AECMA PREN 3155-OLZ-ENGL 2000 LOL23LL OOL83L5 625 m Page 3 prEN 31 55-01 2: 2000 O Introduction The cont
8、acts defined by this standard are derived from and interchangeable with those of MIL-C-39029/90A. They are also interchangeable with those of standard EN 31 55-01 O. 1 Scope This standard specifies the required characteristics and tests applicable to size 8, male triaxial electrical contacts O1 2, t
9、ype D, solder, class R, used in elements of connection according to EN 31 55-002. It shall be used together with EN 31 55-001. The associated female contacts are defined in EN 31 55-01 1 and EN 31 55-01 3. 2 Normative references This European Standard incorporates by dated or undated reference provi
10、sions 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 this European Standard only when incorporated in it by a
11、mendment or revision. For undated references the latest edition of the publication referred to applies. EN 2591* EN 3155-001 EN 31 55-002 EN 31 55-01 O EN 3 EN 3 55-01 1 55-01 3 EN 3375-003 EN 3375-004 EN 3375-005 MIL-A-8243D MI L-C-25769J MlL-C-39029/90A MI L-H-5606E MIL-1-81 969/14 MIL-L-7808J MI
12、L-L-7870A MI L-L-23699C SAE AS 1241A Aerospace series - Elements of electrical and optical connection - Test methods - General Aerospace series - Electrical contacts used in elements of connection - Part 001: Technical specification 1) Aerospace series - Electrical contacts used in elements of conne
13、ction - Part 002: List and utilization of contacts 1) Aerospace series - Electrical contacts used in elements of connection - Part 010: Contacts, electrical, triaxial, size 08, male, type D, crimp, class R - Product standard 1) Aerospace series - Electrical contacts used in elements of connection -
14、Part 011: Contacts, electrical, triaxial, size 8, female, type D, crimp, class R - Product standard 1) Aerospace series - Electrical contacts used in elements of connection - Part 013: Contacts, electrical, triaxial, size 8, female, type D, solder, class R - Product standard 1) Aerospace series - Ca
15、bles, electrical, for signal data transmissions - Part 003: Cables, bifilar, single braid - Product standard 2) Aerospace series - Cables, electrical, for signal data transmissions - Part 004: Cables, bifilar, double braid - Product standard 2) Aerospace series - Cables, electrical, for signal data
16、transmissions - Part 005: Cables, bifilar, double braid, high immunity - Product standard 2) Anti-icing and deicing-defrosting fluids 3) Cleaning compound, aircraft surface, alkaline water base 3) Contact, electrical connector, concentric twinax, pin, size 8 3) Hydraulic fluid, petroleum base, aircr
17、aft, missile and ordnance 3) Installing and removal tools, connector electrical contact, type 111, class 2, composition B 3, Lubricating oil, aircraft turbine engine, synthetic base, NATO code number 0-1 48 3) Lubricating oil, general purpose, low temperature 3) Lubricating oil, aircraft turbine eng
18、ines, synthetic base 3) Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft (March 83) 4) And all its parts quoted 1) Published as AECMA Prestandard at the date of publication of this standard 2) In preparation at the date of publication of this standard 3) Published by: Department of Defens
19、e (DOD), the Pentagon, Washington DC 20301 USA 4) Published by Society of Automotive Engineers, Inc. (SAE), 400 Commonwealth Drive Warrendale, PA 15096-0001 Previous page is blank STD.AECMA PREN 3155-012-ENGL 2000 1012311 001831b 5bL = Pane 4 prN 31 55-01 2: 2000 3 Definitions For the purposes of th
20、is standard, the definitions given in EN 31 55-001 apply. 4 Required characteristics 4.1 Specific characteristics Type D contacts are contacts with screening feature, class R corresponds to an operating temperature range from - 65 “C to 150 OC. They may be delivered in different conditions defined i
21、n table 9 of EN 31 55-001. 4.2 Dimensions and mass See figure 1 for dimensions. Dimensions and tolerances are given in millimetres. Contact mass: 3,50 g ma. 0.58 max. Key 1 Diameter of outside after wiring 2 Corelcentre contact solder zone 3 Corefintermediate contact solder zone 4 Braid/outer contac
22、t solder zone 5 Point of contact with a flat ended gauge pin of diameter 2,870 I 0,005 6 End of contact centre pin 7 Diameter compatible with intermediate pin diameter 2,870 f 0,025 8 Permitted flat 40,2 ma. Figure 1 STD.AECMA PREN 3155-OLZ-ENGL 2000 = 1012311 0018317 4TB = Page 5 prEN 3155-012: 200
23、0 4.3 Material, surface treatment 4.3.1 Material Body: copper alloy 4.3.2 Protective coating Gold on appropriate undercoat for copper alloy parts. Thickness not specified. 4.3.3 Dielectric ETFE Fluoropolymer 4.3.4 Heat-shrinkable tubing Radiation crosslinked polyvinylidene fluoride. 4.4 Permissible
24、cables See table 1. Table I I i I I Cable reference 1 Permissible cable group codes I A I EN 3375-003 I I B I EN 3375-004 I C I EN 3375-005 I 4.5 Dimensions are in millimetres. See figure 2 to figure 17. Stripping of cables and wiring method Pre-position the screening feature ferrule on the cable -
25、Figure 2 Expose the braid by stripping the insulation Figure 3 STD-AECMA PREN 3355-032-ENGL 2000 = 3032313 0038338 334 Page O prEN 31 55-01 2: 2000 Pick up and roll back the braid. Pick up and roll back the first braid. Single braid EN 3375-003 Double braid Double braid - Mu metal EN 3375-004 EN 337
26、5-005 Figure 4 Figure 5 Figure 6 Cut the Mu metal strip Figure 7 Align the two wires of the pair Cut the filler Strip the conductors I I 2 *os Figure 9 Pick up and roll back the second braid Figure 0 Flux (RMA flux) and tin plate the conductors with Sn63 Pb37 Recut the conductors to the lengths indi
27、cated (white and coloured wires of the pair). I I 3,5*0.s Key 1 White colour Figure 10 STD-AECIA PREN 3155-012-ENGL 2000 W LO12311 00183L9 270 Page 7 prEN 3155-012: 2000 Insert the conductors in the contacts: - white conductor: centre contact; - colour conductor: intermediate contact; - introduce th
28、e cable to butt into the contact (centre conductor); - check the position of the colour conductor and the position of the sleeve as indicated. -4 Key 1 Colour conductor 2 3 Oto1 rnax. 4 Cable/contact butt The sleeve covers the jacket of the colour conductor Figure 11 After having checked the alignme
29、nt of the V of the cable clamp with the positioner; insert the contacticable assembly in the positioner. See figure 12. Turn on the heating tool for at least 30 s before Set-up. Position the contact in the heating zone using the holding fixture. 3 4-LJ Key 1 Reflector 2 Positioner 3 Clamp 4 Holding
30、tool Figure 12 2 Heat until the two solder preforms have completely melted. Leave the assembly to cool for a minimum of 15 s before withdrawing the contact from the fixture. STD.AECMA PREN 3155-012-ENGL 2000 I 10123Ll 0018320 T92 Page 8 prEN 31 55-01 2: 2000 Checking the contact Set-up. See figure 1
31、3. The contact can only be correctly Set-up if all of the following conditions are visually observed: - the two solder preforms have disappeared; - respecting the overlap of the colour conductor. 2.5 max. I j U_* Key 1 Overlap 2 Melted solder rings NOTE is not affected. A slight browning of the kyna
32、r sleeve is acceptable given that the performance of the product used Figure 13 Bring back the braid(s) over the body of the contact. See figure 14. Cut the braid according to the dimension indicated. Figure 14 Introduce the screening feature ferrule to butt into the contact shoulder. See figure 15.
33、 Figure 15 STD.AECMA PREN 3155-012-ENGL 2000 LO12311 0018321 q2q m Page 9 prEN 3155-012: 2000 Heat the screening feature ferrule until solder has completely melted through the holes. See figure 16. Hold the ferrule with a tool while heating. Leave the assembly to cool for a minimum of 15 s before wi
34、thdrawing the contact from the tool. Figure 16 Checking the ferrule Set-up The braid shall be correctly wetted by the solder and shall be visible through at least 2 holes in the screening feature ferrule. Figure 17 4.6 Tooling Conform to MIL-I-81969/14 Insertion: not necessary Extraction: M-81969/14
35、-O6 I- 0.25 max. Contact termination: the hot air generator is of a minimum usable capacity of 800 Wand the temperature in the heating zone shall be (420 f 20) OC. The drawing of the tool is given for information purposes: the positioner has an interface for the male contact on side P and the female
36、 contact on side S (see figure 12); the function of the cable clamp is to hold the parts in place during the heating and cooling phases. X X X Cable as per table 1 - Prok distance: (150 f 2) mm Test temperature: ambient Outer Not applicable 4.7 Tests See table 2. Table 2 - Tests Not ipplicable Appli
37、cable EN 2591 - Test According EN 31 55-001 to I Remarks 1 o1 Visual examination i 02 Examination of dimensions and mass Contact resistance - low level 201 Maximum contact resistance Contact 1-1 Intermediate 55 1 66 I 202 Contact resistance at rated current Cable as per table 1 - Prob distance: (150
38、 f 2) mm Maximum contact resistance rnR Rated I I I I initiai Y2lL-I tests tests 661 94 111 Centre I I I I Outer I 6,3 I 7,5 I 10,7 I 12 204 DiscontinuiGf contacts in the microsecond range Method B Duration of discontinuity: 5 Gn At15O“C 2GR 206 Measurement of insulation resistance Method C Proof te
39、ct voltage at sea level: 1 O00 V r.m.s. between centre contact and intermediate contacl and 500 V r.m.s. between intermediate contact and outei contact. Proof test voltage at altitude: 125 V r.rn.s. at 1,l kPa pressure (33 O00 m). Leakage current: 2 mA 207 Voltage proof test 21 o Electrical overload
40、 :ontinued) STD.AECMA PREN 3155-032-ENGL 2000 = LOL23LL 0038323 7Tl Page 11 prEN 31 55-01 2: 2000 The contacts shall be connected to a cable which complies with EN 3375 then fitted in the connectors. The connectors fitted with appropriate cable clamps shall I be mated and mounted on the fixture usin
41、g appropriate mounting systems. The cables are clamped a minimum of 200 mm from the rear of the contacts at a fixed point of the assembly. Discontinuity: I 1 O0 ns Test at (23 f 51 “C Not applicable Applicable According to I Remarks EN 31 55-001 2apacity measurement rransfer impedance X X Under inve
42、stigation Shielding effectiveness from 1 O0 MHz to I GHz Indurance at temperature - X X Method B Duration: 1 O00 h Mould growth Salt mist X X Resistance to fluids X See table 3. Sinusoidal and random vibraions i fi continued) Method A, severity 300. The contacts shall be connect= with a cable as per
43、 EN 3375 then fitted in connectors. The connectors fitted Witt appropriate cable clamps shal be mated and mounted or Table 2 (continued) :N 2591- Test 21 1 21 2 21 3 301 305 qapid change of temperature 306 307 31 5 402 Shock X 403 406 Mechanical endurance XI 1 Damage by test probe Robustness of the
44、contact to flexion Tensile resistance of crimped connections 41 5 41 6 41 7 XI XI -1 41 8 Gauge insertion and extraction forces in and out of a female contact Intermediate contact Gauge see 4.8. Minimum Maximum extraction insertion force force N N Gauge Minimum 0.14 I 0,11 I NA I NA 1 STD-AECMA PREN
45、 3155-012-ENGL 2000 9 LO12311 0018324 638 Page 12 prEN 31 55-01 2: 2000 Measurement of thickness of coating on Adhesion of coating on contacts Magnetic permeability contacts X X X Solderability of contacts with self- contained solder and flux X Synthetic lubricant MI L-L-23699C NATO 0-156 - MI L-L-7
46、808J MlL-C-25769J, diluted 25 % Propanol + 75 % White spirit (R113 + Methanol) Azeotrope R 1 13AzM - - Table 2 (concluded) I Applicable Remarks EN 31 55-001 I EN 2591 - Test 501 Restricted entrance 1x1 I I 502 503 Distortion of the contact after crimping 1x1 I I 508 The measured thickness shall be r
47、ecorded. 509 51 3 51 4 Table 3 - List of fluids Fluid References Immersion Stoving Temp. “C Number of cycles Temp. “C Category I Duration min Fuel JP5 I NATOF-44 5 0 7 25 85 85 1 O0 1 MIL-H-5606E I NATO F-515 Mineral hydraulic fluid 15 +: 5 SAE AS 1241A Skydrol500 B4 1 Skydrol LD4 15 0 85 1 O0 5 Syn
48、thetic hydraulic fluid Mineral lubricant I MIL-L-7870A I NATOO-142 15 +: 120 125 5 15 +; 150 125 5 15 +; 5 25 25 Cleaning products 5 0 2 De-icing fluid I MlL-A-8243D I NATO S-742 15 +; 50 1 O0 5 Chlorobromethane (less than 0,l MPa of overpress u re) 15 0 - 15 25 5 Extinguishing fluid Cooling fluid C
49、oolanol 15 0 50 25 5 STD-AECMA PREN 3155-012-ENGL 2000 30L23LL 0038325 574 Page 13 prEN 3155-012: 2000 10 min. 4.8 Gauge The gauges used for test EN 2591-418 are defined by figure 18 and table 4. Dimensions are in millimetres. R Gauge Figure 18 A B C R L 2,896 2,893 2,847 2,844 Maximum Minimum 2-3 115 0,71 715 22 12 0,58 7 2,3 115 0,71 73 2.2 I .2 0.58 7 Material: tool steel or carbide steel Contact size code (see EN 31 55-001, table 8) 5 Designation EXAMPLE: Permissible cable code (see table 1) Number c NOTE if necessary, the code I9005 shall be place
