AECMA PREN 2997-001-2005 Aerospace Series Connectors Electrical Circular Coupled by Threaded Ring Fire-Resistant or Non Fire-Resistant Operating Temperatures - 65 Degrees C to 175 0.pdf

1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2997-001 Edition P 2 June 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: 49.060 Will supersede EN 2997-001:1997 Desc

2、riptors: ENGLISH VERSION Aerospace series Connectors, electrical, circular, coupled by threaded ring, fire-resistant or non fire-resistant, operating temperatures 65 C to 175 C continuous, 200 C continuous, 260 C peak Part 001: Technical specification Srie arospatiale Connecteurs lectriques circulai

3、res accouplement par bague filete, rsistant au feu ou non, tempratures dutilisation 65 C 175 C continu, 200 C continu, 260 C en pointe Partie 001 : Spcification technique Luft- und Raumfahrt Elektrische Rundsteckverbinder mit Schraubkupplung, feuerbestndig oder nicht feuerbestndig, Betriebstemperatu

4、ren 65 C bis 175 C konstant, 200 C konstant, 260 C Spitze Teil 001: Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the Eur

5、opean 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 shall not be changed to an extent that interchangeability is affected, physically or functionally, wit

6、hout 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 Standard (EN). The CEN nation

7、al 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 publication 30 June 2005 Comments should be sent within six months after the date of publication to AE

8、CMA-STAN Electrical Domain Copyright 2005 by AECMA-STAN Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2997-001:2005 (E) 2 Foreword This standard

9、 was reviewed by the 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 Introduction 4 1 Scop

10、e . 4 2 Normative references 4 3 Terms and definitions . 5 4 Description 6 4.1 General. 6 4.2 Receptacle 6 4.3 Plug 6 4.4 Materials and surface treatment 6 4.4.1 General. 6 4.4.2 Housings 6 4.4.3 Contacts 7 4.4.4 Non-metallic materials 7 5 Design . 7 5.1 Housings 7 5.2 Inserts 7 6 Definition drawing

11、s and masses 8 6.1 General. 8 6.2 Receptacle mating dimensions 8 6.3 Plug mating dimensions 11 6.4 Receptacle and plug polarization 12 6.5 Dimensions of the rear accessory interface . 15 6.6 Contact arrangements 16 6.7 Dimensions of contacts 37 6.7.1 Removable contacts . 37 6.7.2 Fixed contacts . 37

12、 7 Tests 37 7.1 Tests according to EN 2591 . 37 7.2 Special test Endurance at cyclic temperature EN 2591-301 (classes KE, SE and YE). 49 7.3 Gauges to test the holding force of the grounding spring system of the housing 50 7.4 Gauges to test the stability of male contacts in insert 51 8 Quality assu

13、rance 51 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2997-001:2005 (E) 3 8.1 General 51 8.2 Qualification 52 8.2.1 General 52 8.2.2 Sampling a

14、nd definition of specimens. 52 8.2.3 Preparation of specimens. 53 8.2.4 Programme of qualification tests . 54 8.3 Maintenance of qualification 58 8.3.1 Tests 58 8.3.2 Sampling distribution. 58 8.4 Routine test during production. 59 8.5 Quality control 60 9 Designation and marking. 60 9.1 General pri

15、nciple of designation. 60 9.1.1 Connectors (receptacle or plug) 60 9.1.2 Protective covers 61 9.1.3 Dummy receptacle. 61 9.2 Marking. 61 10 Delivery conditions. 62 11 Packaging 62 12 Storage 62 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license wi

16、th AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2997-001:2005 (E) 4 Introduction This family of connectors is derived from MIL-DTL-83723F series III, type T with which it is intermateable. It is particularly suitable for use on aircraft engines and in

17、zones of severe environmental conditions on board aircraft, applying EN 2282. These connectors are distinguishable from MIL-DTL-83723F by: the mechanical stop for coupling being achieved manually; the coupling system having a self-locking nut that features a greater resistance to decoupling; the var

18、iety of the functional classes and models. 1 Scope This standard specifies the general characteristics, the conditions for qualification acceptance and quality assurance, and the test programs and groups for threaded ring coupling circular connectors, fire-resistant or non fire-resistant, intended f

19、or use in a temperature range from 65 C to 175 C continuous, 200 C continuous or 260 C peak according to the classes and models. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For

20、 undated references, the latest edition of the referenced document (including any amendments) applies. ISO 263, ISO Inch screw threads General plan and selection for screws, bolts and nuts Diameter range 0,06 to 6 in. ISO 4524-1, Metallic coatings Test methods for electrodeposited gold and gold allo

21、y coatings Part 1: Determination of coating thickness. EN 2267-002, Aerospace series Cables, electrical, for general purpose Operating temperatures between 55 C and 260 C Part 002: General. 1)EN 2282, Aerospace series Characteristics of aircraft electrical supplies. EN 2346-003, Aerospace series Cab

22、le, electrical, fire resistant Operating temperatures between 65 C and 260 C Part 003: DL family, single core Product standard. 1)EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. EN 2997-002, Aerospace series Connectors, electrical, circular, coupled by t

23、hreaded ring, fire-resistant or non fire-resistant, operating temperatures 175 C continuous, 200 C continuous, 260 C peak Part 002: Specification of performance and contact arrangements. 1) Published as AECMA Prestandard at the date of publication of this standard. Including all its parts. Copyright

24、 Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2997-001:2005 (E) 5 EN 3155-001, Aerospace series Electrical contacts used in elements of connection Part 0

25、01: Technical specification. 1) EN 3197, Aerospace series Installation of aircraft electrical and optical interconnection systems. 1)EN 3660-003, Aerospace series Cable outlet accessories for circular and rectangular electrical and optical connectors Part 003: Grommet nut, style A for EN 2997 and EN

26、 4067 Product standard. 1)EN 3660-004, Aerospace series Cable outlet accessories for circular and rectangular electrical and optical connectors Part 004: Cable outlet, style A, straight, unsealded with clamp strain relief for EN 2997 and EN 4067 Product standard. 1)EN 9133, Aerospace series Quality

27、management systems Qualification Procedure for aerospace standard parts. MIL-DTL-83723F, Connectors, electrical, (circular, environment resisting), receptacles and plugs, general specification for.2)MIL-PRF-7808L, Lubricating oil, aircraft turbine engine, synthetic base, NATO code number O 148. 2)MI

28、L-PRF-7870C, Lubricating oil: general purpose, low temperature, NATO code number O-142. 2)MIL-PRF-23699F, Lubricating oil, aircraft turbine engine, synthetic base, NATO code number O-156. 2)MIL-PRF-87937D, Cleaning compound aerospace equipment. 2)MIL-HDBK-454A, General guidelines for electronic equi

29、pment. 2)QPL-5606-31, Hydraulic fluid, petroleum base; aircraft; missile and ordnance. 2)AS1241C, Fire resistant phosphate ester hydraulic fluid for aircraft. 3)AMS1424D, Fluid, Deicing/Anti-Icing, Aircraft, SAE Type I. 3)TR 4257, Aerospace series Elements of electrical and optical connection Relati

30、onship between the numbering systems for parts of EN 2591. 4)3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 2591 apply. 2) Published by: Department of Defense (DOD), The Pentagon, Washington D.C. 20301, USA. 3) Published by Society of Automotive Engi

31、neers Inc. (SAE) 400 Commonwealth Drive, Warrendale, PA 15096-001, USA. 4) Published as AECMA Technical Report at the date of publication of this standard. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction

32、or networking permitted without license from IHS-,-,-prEN 2997-001:2005 (E) 6 4 Description 4.1 General Different variants of materials, housings and contact arrangements are provided according to the model and class. These connectors use crimp or solder contacts of sizes 20, 16 and 12. The receptac

33、les and plugs contain either male contacts or female contacts. The contacts fitted in the classes Y and YE receptacles are exclusively of the male non-removable solder type. The connectors are polarized by means of keyways and keys; polarization shall be obtained before the male contacts enter the i

34、nsert of the female contacts and before the coupling ring is engaged. The position of the keying arrangement is given in Table 5. Masking of the blue colour band on the receptacle provides visual indication of full coupling. 4.2 Receptacle The receptacle may be attached by: square flange; the jam-nu

35、t with O-ring sealing; for spare parts, see EN 2997-002; round flange for attachment by soldering/brazing/welding, classes Y and YE only. The receptacle contains five keyways into which the keys of the plug engage. The main keyway is fixed and is wider than the others. Polarization is ensured by dif

36、ferent positions of the secondary keyways. The position of the insert is fixed relative to the main keyway. 4.3 Plug The plug contains five keys, which engage in the keyways of the receptacle. The main key is wider than the others. Polarization is ensured by different positions of the secondary keys

37、. The position of the insert is fixed relative to the main key. The coupling ring permanently fitted on the plug enables the connectors to be coupled and uncoupled. The coupling torque shall be at least 50 % lower than the uncoupling torque. The internal thread of the coupling ring may be treated du

38、ring manufacture with a suitable lubricant compatible with the performance required in this standard. The plug of classes S, SE, RS and WS is fitted with a grounding spring device ensuring electrical continuity between the coupled connector housings. 4.4 Materials and surface treatment 4.4.1 General

39、 When dissimilar metals are in close contact, adequate protection against corrosion shall be used for the electromotive force of the cell not to exceed 0,25 V (see EN 3197). 4.4.2 Housings The material of the housing for the connectors and for the fittings may either be passivated stainless steel or

40、 aluminium alloy protected against corrosion by nickel or cadmium plating (see EN 2997-002). Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2997-

41、001:2005 (E) 7 4.4.3 Contacts Unless otherwise specified, the contacts shall be in ferrous alloy for classes Y and YE and in copper alloy for the other model. The contacts for classes Y and YE shall be gold-plated on an appropriate undercoat (silver undercoat shall not be used). Selective protection

42、 is authorized provided that it is sufficient to ensure that performance is not affected. Measurement of the thickness of the protective treatment shall be effected in accordance with EN 2591-508. For removable contacts, see EN 2997-002. 4.4.4 Non-metallic materials The materials used for insert, se

43、als and grommets shall have hardness and mechanical and electrical characteristics consistent with the required use. 5 Design 5.1 Housings The connector housings shall be in one unit. They shall contain teeth at the rear over the entire periphery and shall accommodate the cable outlet accessory and

44、other fittings. The receptacle shall furthermore be fitted with an O-ring seal for sealing the coupled housings. Receptacles for attachment by nut shall contain an O-ring seal. The nut shall have holes for the passage of locking wire. The threads shall conform to ISO 263. The coupling ring shall be

45、designed so that the male and female contacts engage when it is rotated clockwise and disengage when it is rotated anti clockwise. The coupling ring shall be knurled to aid gripping by hand. On completion of tightening of the coupling ring, mechanical metal to metal contact shall exist between the r

46、eceptacle and the plug mating faces, indicated by masking of the blue colour band (see Figure 1). The cable outlet accessories shall compress the grommet of the connectors without twisting it. A blue colour band indicating that the crimp contacts of the connectors are intended for rear removal shall

47、 be provided: behind the flange of the receptacles with square flange; on the flange of receptacles for nut attachment; on the coupling ring of the plugs. The position of the blue colour bands shall be such that at least one of them is visible at all times on the coupling ring of the plug. 5.2 Inser

48、ts The insert carrying the male and female contacts shall be in hard material and have a cross section and radii such that no cracks, flaking or breaks can occur in normal operation. The insert for contacts shall be non-removable; it shall be mechanically held in the housing. Sealing shall be provid

49、ed between the housing and insert. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2997-001:2005 (E) 8 The front face of the insert shall be such tha