BS-EN-3841-511-2004.pdf

BRITISH STANDARD AEROSPACE SERIES BS EN 3841-511:2004 Circuit breakers Test methods Part 511: Combined test: temperature, altitude and vibration The European Standard EN 3841-511:2004 has the status of a British Standard ICS 49.060 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 02:28:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 3841-511:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 24 February 2005 © BSI 24 February 2005 ISBN 0 580 45547 5 National foreword This British Standard is the official English language version of EN 3841-511:2004. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Subcommittee ACE/6/5, Circuit breakers, which has the responsibility to: A list of organizations 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 Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible 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. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 02:28:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 3841-511 December 2004 ICS 49.060 English version Aerospace series - Circuit breakers - Test methods - Part 511: Combined test: temperature, altitude and vibration Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 511 : Essai combiné : température, altitude et vibrations Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 511: Kombinierter Versuch: Temperatur, Höhe und Schwingung This European Standard was approved by CEN on 10 September 2004. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3841-511:2004: E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 02:28:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 3841-511:2004 (E) 2 Contents Page 1 Scope4 2 Normative references4 3 Method4 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 02:28:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 3841-511:2004 (E) 3 Foreword This document (EN 3841-511:2004) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 02:28:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 3841-511:2004 (E) 4 1 Scope This standard specifies a method for a combined test of temperature, altitude and vibration of circuit breakers. It shall be used together with EN 3841-100. 2 Normative references The following referenced documents are indispensable for the application 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 3841-100, Aerospace series Circuit breakers Test methods Part 100: General EN 3841-506, Aerospace series Circuit breakers Test methods Part 506: Vibration performance 3 Method 3.1 Mounting The circuit breakers shall be mounted in a test chamber on the vibrator according to 4.2 and 4.3 in EN 3841-100. The means of mounting shall be designed so as to transmit vibrations over the whole frequency range without absorption or natural resonance. An example of an apparatus is given in Figure 1. The electrical connection shall be made with the cables of the sections specified in EN 3841-100, Table 1. The connection cables shall be attached to the vibration support approximately 100 mm from the terminals. The circuit breakers and the cables shall be mounted with the torque indicated in the product standard. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 02:28:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 3841-511:2004 (E) 5 Key 1 Acceleration control 6 Circuit breaker test chamber 2 Temperature control 7 Circuit breaker 3 Pressure generator and control 8 Circuit breaker support 4 Electrical cables 9 Temperature test chamber (fixed) 5 Flexible seal 10 Vibrator Figure 1 3.2 Procedure The circuit breakers shall be subjected to a load in accordance with the values specified in the technical specification, until thermal stabilization. The temperature and the pressure in the circuit breakers test chamber shall be stabilized, and maintained at the values specified in the technical specification. NOTE The temperature shall be measured at the lower and the upper level of the test chamber, and the difference shall be 10 °C maximum. The tolerance for pressure shall be ± 3 %. The circuit breakers shall be subjected to the vibration test according to 3.2 in EN 3841-506, at the values specified in the technical specification. 3.3 Requirement Requirements in accordance with technical specification and product standard. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 02:28:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 3841-511:2004 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. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. 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