BS-EN-2591-317-1998.pdf

BRITISH STANDARD AEROSPACE SERIES BS EN 2591-317:1998 Elements of electrical and optical connection Test methods Part 317: Flammability The European Standard EN 2591-317:1998 has the status of a British Standard ICS 49.060 BS EN 2591-317:1998 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1998 © BSI 05-1999 ISBN 0 580 30305 5 National foreword This British Standard is the English language version of EN 2591-317:1998. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic, electrical and fibre optic technology, to Subcommittee ACE/6/3, Aerospace-Connectors, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee 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 Standards Catalogue under the section entitled “International Standards 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 contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments BS EN 2591-317:1998 © BSI 05-1999i Contents Page National forewordInside front cover Foreword2 Text of EN 2591-3173 ii blank EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 2591-317 June 1998 ICS 49.060 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, test English version Aerospace series Elements of electrical and optical connection Test methods Part 317: Flammability Série aérospatiale Organes de connexion électrique et optique Méthodes dessais Partie 317: Ininflammabilité Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prüfverfahren Teil 317: Nichtentflammbarkeit This European Standard was approved by CEN on 22 June 1997. 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 without any alteration. Up-to-date 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 responsibility 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, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-317:1998 E EN 2591-317:1998 © BSI 05-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried 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 by 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 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement 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. Contents Page Foreword2 1Scope3 2Normative references3 3Preparation of specimens3 4Apparatus3 5Method4 Figure 1 4 EN 2591-317:1998 © BSI 05-19993 1 Scope This standard specifies a method of verifying the flammability 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 the 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. ISO 4046-1978, Paper, board, pulp and related terms Vocabulary. EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. EN 2591-101, Aerospace series Elements of electrical and optical connection Test methods Part 101: Visual examination. EN 2591-207, Aerospace series Elements of electrical and optical connection Test methods Part 207: Voltage proof test. EN 2591-312, Aerospace series Elements of electrical and optical connection Test methods Part 312: Air leakage1). EN 2591-409, Aerospace series Elements of electrical and optical connection Test methods Part 409: Contact retention in insert1). 3 Preparation of specimens 3.1 Specimens shall be prepared according to the technical specification. Unwired cavities shall be fitted with filler plugs. 3.2 Unless specified in the technical specification, the following details shall be stated: specimens mated or unmated and fitted with protective covers; mounting method, type of cable (non propagating flames) and definition of specimen wiring; method A or B; final measurements and requirements (if applicable); force to be applied according to EN 2591-409; leakage rate according to EN 2591-312; method according to EN 2591-207 and voltage value. 4 Apparatus The dimensions of the chamber shall be approximately as follows: length 300 mm, width 300 mm, height 600 mm (see Figure 1). It shall be open on the top and front faces. The air circulation shall be sufficient but there shall be no draught. The specimens shall be held in position with a suitable device so that the thermal inertia is negligible. The specimens shall be installed in the test chamber with their longitudinal axis positioned at an angle of (30 ± 5)° to the horizontal. For specimens with protective covers, cables shall be directed downwards. A piece of easily flammable paper (tissue paper to ISO 4046) approximately 250 mm × 250 mm shall be stretched over a frame, about 300 mm to 350 mm below the specimens. The burner with a nozzle diameter of approximately 10 mm shall be positioned under the specimen so that its axis is at an angle of 30° to the vertical. The flame shall be 50 mm to 70 mm high and its hottest point on the edge of the specimens shall have a temperature of (955 ± 30) °C. 1) Published as AECMA Prestandard at the date of publication of this standard EN 2591-317:1998 4 © BSI 05-1999 5 Method 5.1 Test procedure The flame shall be applied for (30 ± 1) s to the lower edge of the specimens. It shall also cover any possible non-metallic materials of accessories. Method A safety: 5.2.1 applies Method B safety and functioning: 5.2.1 and 5.2.2 apply. 5.2 Requirements 5.2.1 Throughout the test there shall be no dripping which shall cause paper to ignite. Burning and afterglow shall extinguish within 30 s from removal of the flame. 5.2.2 Final measurements and requirements (if applicable) The specimens shall be subjected to the following test sequence: EN 2591-207: at ambient temperature with 250 V r.m.s., 40 Hz to 60 Hz; EN 2591-101: damage to the insert exposing the contact by 3 mm or more is not acceptable; EN 2591-409: with 50 % of the nominal load applied for 5 s; EN 2591-312: only for hermetic elements of connection. Figure 1 blank BS EN 2591-317:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. 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