1、BRITISH STANDARD AEROSPACE SERIES %.$%rnW. Elements of electrical and optical connection - Test methods - Part 318: Fire-resistance 2591-3181998 The European Standard EN 2591318:1998 has the status of a British Standard ICs 49.060 BS EN 2591318:1998 AmdaNo. National foreword Date Text affected This
2、British Standard is the English language version of EN 2591318: 1998. The UK participation in its preparation was entrusted to Technical Committee ACEY6, Aerospace avionic, electrical and fibre optic technology, to Subcommittee ACEY6/3, Aerospace - Connectors which has the responsibility to: - aid e
3、nquirers to understand the text; - present to the responsible internationavEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed - monitor related international and European developments and promuigate them in the UK. A list of organizati
4、ons represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI standardc Caalogue under the section entitled “International StancLwck
5、Correspondence Index”, or by using the “Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a con- Users of British Standards are responsible for their correct application. Compliance with a British Standard does not
6、 of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside Yont cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. This British Standard, having been prepared under the direction of the Engineering Sector Board, wa
7、s published under the authority of the Standards Board and comes into effect on 15 August 1998 O BSI 1998 ISBN O 580 30306 3 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-318 June 1998 ICs 49.060 Descriptors: aircraft industry, aircraft equipment, connecting equipment, test English versi
8、on 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 Verbindungselemente - Prfverfahr
9、en - Teil 318: Feuefbestndigkeii This European Standard was approved by CEN on 22 June 1997. CEN members are bound to compiy with the CENiCENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date
10、 lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the r
11、esponsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
12、 Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EROPEAN COMMiITEE FOR STANDARDIZATION EUROPISCHES KOMITEE FUR NORMUNG COMITE EUROPEEN DE NORMALISATION Central %retaria: rue de Stassart, 36 6-1050 Brussels Q 1998 CEN All rights of exploitation in any form and by any mean
13、s reserved worldwide for CEN national Members. Ref. No. EN 2591-318:1998 E STD.BS1 BS EN 259L-3LB-ENGL 1998 3624669 0735272 887 Page 2 EN 2591 -31 81998 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMAI . After inquiries and votes carrie
14、d out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either b
15、y publication of an identical text or by endorsement, at the latest by December 1998, and conflicting national standards shall be withdrawn at the latest by December 1998. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to i
16、mplement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 3 EN 2591 -31 8:1998 1 Scope This standard specifies a method of d
17、etermining fire-resistance of elements of connection. It shall be used together with EN 2591. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and th
18、e publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 2
19、685 Aircraft - Environmental conditions and test procedures for airborne equipment - Resistance to fire in designated fire zones EN 2234 Aerospace series - Fire-resisting electrical cables - Technical specification 1) EN 2591 Aerospace series - Elements of electrical and optical connection - Test me
20、thods - General 3 Preparation of specimens 3.1 Specimens shall be wired with cable bundles 450 mm min. in length. There shall be at least one circuit for each contact size. In each circuit, the contacts shall be connected in series. In the case of high numbers of contacts of the same size, two circu
21、its may be required, one connecting in series the even-numbered contacts and the other the odd-numbered contacts. Specimens shall be prepared according to the technical specification. 3.2 - mounting method, type of cable (e.g. EN 2234: fire-resistant) and definition of specimen wiring; - initial mea
22、surements (if applicable); - value of leakage current (phase 1); - nominal current to be applied to contacts (phase 1); - number and position of burners. Unless specified in the technical specification, the following details shall be stated: 1) Published as AECMA Prestandard at the date of publicati
23、on of this standard Page 4 EN 2591-318:1998 4 Apparatus W 1624669 4.1 in figure 1. The assembly shall be rigidly secured to a vibration generator. 4.2 The mated specimens shall be mountec on a steel sheet represen ativ- of a firewall as shown The circuits shall be connected to an electrical installa
24、tion as shown in figure 2. r Wiring support / I Figure 1 - Test setup STD*BSI BS EN 2591-31B-ENGL 1998 M.Lb24bb9 0735275 596 M Page 5 EN 2591-318:1998 Switch 2 Figure 2 - Basic diagram 4.3 Flame In accordance with IS0 2685 The temperature of the flame shall be checked before and after the test accor
25、ding to IS0 2685. 4.4 The burner shall be positioned as shown in figure 1. For large size specimens, several burners shall be installed as specified so that the specimens shall be wholly enveloped in flame. 5 Method 5.1 Initial measurements (if applicable) They shall be carried out as specified. 5.2
26、 Procedure The specimens shall be simultaneously exposed to the flame and vibrations at a constant frequency between 30 Hz and 60 Hz of 100 m/s2 acceleration throughout the tests. 5.2.1 Phase 1 During the first 5 min, the contacts shall carry a constant current of the specified nominal value: switch
27、 2 is closed, switch 1 is open (see figure 2). After the fifth minute, a potential of 200 V r.m.s. to 260 V r.rn.s., 40 Hz to 60 Hz, shall be applied for 1 min between each of the circuits and 100 V to 130 V potential between each circuit and the housing (shell): switch 1 is closed, switch 2 is open
28、 (see figure 2). 5.2.2 Phase 2 The flame shall be applied for 14 min, with no voltage on the circuits. Page 6 EN 2591-3181998 5.3 Requirements 5.3.1 Phase 1 There shall be no electrical discontinuity during the first 5 min and no leakage current higher than the specified value during the sixth minut
29、e. 5.3.2 Phases 1 and 2 No flame shall be visible on the side of the specimen not exposed to the burner. BS EN 2591-318:1998 BSI 389 Chiswick High Road London w4 4AL BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and a
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