EN 2591-318-2018 Aerospace series - Elements of electrical and optical connection - Test methods - Part 318 Fire-resistance.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Aerospace series - Elements of electrical and optical connection - Test methodsPart 318: Fire-resistanceBS EN 2591-318:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-318 August 2018 ICS 49.060 Supersedes

2、EN 2591-318:1998English Version Aerospace series - Elements of electrical and optical connection - Test methods - Part 318: Fire-resistance Srie arospatiale - Organes de connexion lectrique et optique - Mthodes dessais - Partie 318 : Rsistance au feu Luft- und Raumfahrt - Elektrische und optische Ve

3、rbindungselemente - Prfverfahren - Teil 318: Feuerbestndigkeit This European Standard was approved by CEN on 13 May 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard witho

4、ut any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other l

5、anguage made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Den

6、mark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN

7、COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-318:2018 ENa

8、tional forewordThis British Standard is the UK implementation of EN 2591318:2018. It supersedes BS EN 2591318:1998, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.A list of organizations r

9、epresented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978

10、0 580 99701 3ICS 49.060Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH ST

11、ANDARDBS EN 2591318:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-318 August 2018 ICS 49.060 Supersedes EN 2591-318:1998English Version Aerospace series - Elements of electrical and optical connection - Test methods - Part 318: Fire-resistance Srie arospatiale - Organes de connexion

12、lectrique et optique - Mthodes dessais - Partie 318 : Rsistance au feu Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prfverfahren - Teil 318: Feuerbestndigkeit This European Standard was approved by CEN on 13 May 2018. CEN members are bound to comply with the CEN/CENELEC Inter

13、nal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any

14、CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official ver

15、sions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

16、 Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights

17、 of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-318:2018 EBS EN 2591318:2018EN 2591-318:2018 (E) 2 Contents Page European foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Preparation of specimens 4 5 Apparatus. 7

18、6 Method 13 BS EN 2591318:2018EN 2591-318:2018 (E) 3 European foreword This document (EN 2591-318:2018) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association

19、, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at

20、 the latest by February 2019, and conflicting national standards shall be withdrawn at the latest by February 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such

21、patent rights. This document supersedes EN 2591-318:1998. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, F

22、inland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. BS EN 2591318:2018EN 2591

23、-318:2018 (E) 4 1 Scope This European Standard specifies a method of determining fire-resistance of elements of connection. It shall be used together with EN 2591-100. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitut

24、es requirements 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 2234, Aerospace series Cable, electrical, fire resistant Technical specification EN 2591-100, Aerospace

25、 series Elements of electrical and optical connection Test methods Part 100: General EN 2997 (all parts), 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

26、 EN 3645 (all parts), Aerospace series Connectors, electrical, circular, scoop proof, triple start threaded coupling, operating temperature 175 C or 200 C continuous EN 3660 (all parts), Aerospace series Cable outlet accessories for circular and rectangular electrical and optical connectors ISO 2685

27、, Aircraft Environmental test procedure for airborne equipment Resistance to fire in designated fire zones 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electroped

28、ia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 4 Preparation of specimens 4.1 Layouts For EN 2997: 8-06 for contact size 22; 10-06 for contact size 20; 18-08 for contact size 12; 24-30 for contact size 16. In case of non-availability of

29、one or more of above mentioned layout, equivalent layouts will be assessed and justified by mandated body representative. BS EN 2591318:2018EN 2591-318:2018 (E) 5 For EN 3645: 9-35 for contact size 22; 11-98 for contact size 20; 17-06 for contact size 12; 21-48 for contact size 8; 23-21 for contact

30、size 16. In case of non-availability of one or more of above mentioned layout, equivalent layouts will be assessed and justified by mandated body representative. 4.2 Specimen preparation 4.2.1 Model without integrated accessory Figure 1 Figure 2 The connector shall be fitted with straight backshell,

31、 unsealed with clamp strain relief type EN 3660-XXX or equivalent on both sides of the assembly. Cables in the area between the clamps and rear grommet shall be exposed to the flame without protection, see Figure 1 and Figure 2. Glass fibre sheath or equivalent shall be installed where the cables co

32、ntact the clamp, to avoid any electrical breakdown in this area. 4.2.2 Model with integrated accessory Cables and rear grommet shall be exposed to the flame without protection or metallic braid with no load or strain on the cable/contact assembly. 4.3 Wiring Specimens shall be wired with cable bundl

33、es 450 mm min. in length. All cavities shall be fitted with wired contacts. Two circuits shall be connected in series, one using the even-numbered contacts and the other using the odd-numbered contacts, see Figure 9. BS EN 2591318:2018EN 2591-318:2018 (E) 6 In case of alphabetical identification of

34、contact cavities, the following rule shall apply: A = 1, B = 2, etc. Cables shall be clamped between 200 mm to 250 mm of the rear of the grommet on both sides of the assembly. 4.4 Test requirements Unless specified in the technical specification, the following details shall be stated: mounting metho

35、d, type of fire-resistant cable (e. g. EN 2234) and definition of specimen wiring; initial measurements (if applicable); value of leakage current (phase 1); nominal current to be applied to contacts (phase 1); position of burner, see Figure 4, Figure 5 and Figure 6; diameter “D”, see Table 1. Accord

36、ing to ISO 2685 the major cross section “A” and the area of the flame at the nozzle of the burner “B” are linked by the following formula: A 2B for an illustration of the major cross section, see Figure 3. Key 1 Burner diameter D 2 “Shadows” of specimen 3 Plane parallel to burner Nozzle 4 Specimen 5

37、 Bracket 6 Support plate 7 Plug 8 Major cross section = A Major cross section = Area of the specimen (plug) projected onto a plane placed at 45. Figure 3 Major cross section BS EN 2591318:2018EN 2591-318:2018 (E) 7 For burner diameter, see Table 1. Table 1 Minimum burner diameter vs major cross sect

38、ion Connector type Layout Major cross section (connector shadow) A mm2Burner diameter minimum D mm EN 2997 8-06 577 19 10-06 708 21 18-08 1290 29 24-30 1912 35 EN 3645 9-35 559 19 11-98 689 21 17-06 1221 28 21-48 1495 31 23-21 1727 33 For the cross section of connectors not called-up in Table 1, the

39、 minimum burner diameter shall be calculated and agreed with the Mandated Body prior to testing. 5 Apparatus 5.1 General The rig shall allow the burner to move/rotate between the calibration and the assembled test samples, without turning off the burner or modifying the intended distance and relativ

40、e position of the test sample. The distance from the burner nozzle to the connector dimension “h”, see Figure 4, shall be calibrated according to ISO 2685. 5.2 Setup The mated specimens shall be rear mounted on a steel sheet representative of a firewall as shown in Figure 4, Figure 5 and Figure 6. T

41、he assembly shall be rigidly secured to a vibration generator. The circuits shall be connected to an electrical installation as shown in Figure 9. The position of the thermocouple(s) relative to both the burner and test sample during the test period, shall be identical to the thermocouple position a

42、chieved relative to both the burner and calibration tube during calibration of the assembly. The angle and direction of the burner and flame shall be the same as utilised during calibration. See Figure 4 and Figure 6. BS EN 2591318:2018EN 2591-318:2018 (E) 8 Key 1 Tip of thermocouple here - 6 mm to

43、7 mm between the thermocouple sensor tip and the test specimen 2 Stiffening frame 3 Plug 4 Receptacle 5 Wiring support 6 250 mm x 250 mm (approximately) 7 Vibration table 8 Support plate, see Figure 7c for an example of a typical plate 9 Receptacle flange 10 Reinforcing plate 11 Connector mounting p

44、late, see Figure 7b for an example of a typical plate (steel sheet: 1 mm to 1,5 mm) 12 Burner A Diameter of the flame at the burner nozzle exit NOTE “h” is in relation with the flame calibration, see ISO 2685. Figure 4 Typical test setup Flame shall be pointed towards the rear of the connector, any

45、angular position 90 from bottom of vertical axis of the connector, see Figure 6. BS EN 2591318:2018EN 2591-318:2018 (E) 9 Key 1 Burner 2 Vibration direction (unless otherwise specified by the product standard) 3 Vibration table Figure 5 Test setup Key 1 Connector 2 Burner 3 90 max (shall remain belo

46、w the horizontal plane) Figure 6 Burner attitude options BS EN 2591318:2018EN 2591-318:2018 (E) 10 Key 1 15,24 rad. 2 5,28 / 5,13 dia. (17 required) (see hole pattern) NOTE Thermal barrier sheet required to prevent destructive heat transfer to vibration equipment. a) Thermal barrier sheet Key 1 254

47、x 254 x 3,18 mild steel 2 5,28 / 5,13 dia. (12 required ) (see hole pattern) 3 8,53 x 8,36 dia. (2 required) 4 “A” hole shall provide suitable clearance for the applicable connector 5 “B” connector mounting holes shall be as specified for the connector b) Connector mounting plate BS EN 2591318:2018E

48、N 2591-318:2018 (E) 11 Key 1 254 x 177,80 x 12,70 mild steel 2 15,24 rad. 3 5,28 x 5,13 dia. (17 required) (see hole pattern) c) Support plate Key 1 5,28 x 5,13 dia. (typ.) (ref.) d) Hole pattern Figure 7 Example of a firewall connector fixture details BS EN 2591318:2018EN 2591-318:2018 (E) 12 Figur

49、e 8 Firewall connector fixture assembly Key 1 Insulation transformer 2 0 A to 5 A 3 Power supply 28 V DC, 2 A continuous 4 Adjustable resistor 5 0 mA to 100 mA 6 Power supply AC 230 V between phase, AC 115 V between phase and neutral 7 Connector shell Figure 9 Schematic diagram BS EN 2591318:2018EN 2591-318:2018 (E) 13 5.3 Flame Flame shall be in accordance with ISO 2685. The temperature of the flame shall be checked before the test according to ISO 2685. The