1、BSI Standards PublicationBS EN 2794-001:2014Aerospace series Circuitbreakers, single-pole,temperature compensated,rated current 20 A to 50 APart 001: Technical specificationBS EN 2794-001:2014Incorporating corrigendum March 2014BS EN 2794-001:2014 BRITISH STANDARDNational forewordThis British Standa
2、rd is the UK implementation of EN 2794-001:2014. It supersedes BS EN 2794-001:1999 which is withdrawn.The CEN Correction Notice 12 February 2014 provided a revised English language text, incorporating the following editorial corrections: part of the text in the Tests column of Table 3 has been reins
3、erted sub clause 7.3 has been corrected the layout in Table 7 has been amended.The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.A list of organizations represented on this committee can be obtained on request
4、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 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 86009 6ICS 49.060Compliance with a British Standa
5、rd cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2014.Amendments/corrigenda issued since publicationDate Text affected31 March 2014 Implementation of CEN correction notice 12 February
6、 2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2794-001 January 2014 ICS 49.060 Supersedes EN 2794-001:1999English Version Aerospace series - Circuit breakers, single-pole, temperature compensated, rated current 20 A to 50 A - Part 001: Technical specification Srie arospatiale - Disjoncte
7、urs unipolaires compenss en temprature, intensits nominales 20 A 50 A - Partie 001: Spcification technique Luft- und Raumfahrt - Schutzschalter, einpolig, temperaturkompensiert, Nennstrme von 20 A bis 50 A - Teil 001: Technische Lieferbedingungen This European Standard was approved by CEN on 28 Sept
8、ember 2013. 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 o
9、btained 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 language made by translation under the responsibility of a CEN member into its own language and notified to the
10、 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, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Irel
11、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Cen
12、tre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2794-001:2014 EEN 2794-001:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Description
13、.4 5 Design .5 5.1 Materials .5 5.1.1 Metallic materials .5 5.1.2 Insulation materials .5 5.2 Design .5 5.2.1 Insulating box .5 5.2.2 Free release mechanism .5 5.2.3 Attachment .5 5.2.4 Electrical connection units .5 5.2.5 Control actuator .6 5.2.6 Rating inviolability .6 5.2.7 Leakage lines .6 5.2.
14、8 Protection against non-release 6 6 Characteristics .6 6.1 General characteristics .6 6.2 Ratings 7 6.3 Nominal voltage of operational circuits 7 6.4 Dimensional characteristics .7 6.5 Recommended panel mounting dimensions 7 7 Tests 8 7.1 Mechanical tests 8 7.2 Environmental tests 9 7.3 Electrical
15、tests . 14 8 Qualification tests . 16 8.1 Sampling 16 8.2 Material tests . 19 8.3 Periodic checks for qualification maintenance . 19 9 Quality assurance . 19 10 Marking 19 11 Delivery conditions . 19 12 Packaging 20 13 Storage . 20 13.1 Definition . 20 13.2 Storage conditions . 20 13.3 Storage durat
16、ion . 20 BS EN 2794-001:2014EN 2794-001:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Description .4 5 Design .5 5.1 Materials .5 5.1.1 Metallic materials .5 5.1.2 Insulation materials .5 5.2 Design .5 5.2.1 Insulating box .5 5.2.2 Free release m
17、echanism .5 5.2.3 Attachment .5 5.2.4 Electrical connection units .5 5.2.5 Control actuator .6 5.2.6 Rating inviolability .6 5.2.7 Leakage lines .6 5.2.8 Protection against non-release 6 6 Characteristics .6 6.1 General characteristics .6 6.2 Ratings 7 6.3 Nominal voltage of operational circuits 7 6
18、.4 Dimensional characteristics .7 6.5 Recommended panel mounting dimensions 7 7 Tests 8 7.1 Mechanical tests 8 7.2 Environmental tests 9 7.3 Electrical tests . 14 8 Qualification tests . 16 8.1 Sampling 16 8.2 Material tests . 19 8.3 Periodic checks for qualification maintenance . 19 9 Quality assur
19、ance . 19 10 Marking 19 11 Delivery conditions . 19 12 Packaging 20 13 Storage . 20 13.1 Definition . 20 13.2 Storage conditions . 20 13.3 Storage duration . 20 EN 2794-001:2014 (E) 3 Foreword This document (EN 2794-001:2014) has been prepared by the Aerospace and Defence Industries Association of E
20、urope - Standardization (ASD-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 ASD, prior to its presentation to CEN. This European S
21、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2014, and conflicting national standards shall be withdrawn at the latest by July 2014. Attention is drawn to the possibility that some of the elements of thi
22、s document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 2794-001:1999. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countrie
23、s are bound to implement this European Standard: 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, Poland
24、, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2794-001:2014EN 2794-001:2014 (E) 4 1 Scope This European Standard specifies the single-pole temperature compensated circuit breakers rated from 20 A to 50 A and used in aircraft on-board circui
25、ts. It describes specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100. These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282 (all categories). 2 Norma
26、tive references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
27、applies. EN 2083, Aerospace series - Copper and copper alloys conductors for electrical cables - Product standard EN 2282, Aerospace series - Characteristics of aircraft electrical supplies EN 2825, Aerospace series - Burning behaviour of non metallic materials under the influence of radiating heat
28、and flames - Determination of smoke density EN 2826, Aerospace series - Burning behaviour of non metallic materials under the influence of radiating heat and flames - Determination of gas components in the smoke EN 3841-100 (all parts), Aerospace series Circuit breakers Test Methods Part 100: Genera
29、l EN 3844-1, Aerospace series - Flammability of non metallic materials - Part 1: Small burner test, vertical - Determination of the vertical flame propagation EN 9133, Aerospace series - Quality management systems - Qualification procedure for aerospace standard parts TR 6083, Aerospace series Cut-o
30、uts for installation of electrical components 1)3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3841-100 apply. 4 Description These circuit breakers are operated by a “push-pull” type single push button (actuator) and with delayed action “trip-free” t
31、ripping. Their function is ensured up to the short-circuit current. 1) Published as ASD-STAN Technical Report at the date of publication of this standard. http:/www.asd-stan.org/ BS EN 2794-001:2014EN 2794-001:2014 (E) 4 1 Scope This European Standard specifies the single-pole temperature compensate
32、d circuit breakers rated from 20 A to 50 A and used in aircraft on-board circuits. It describes specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100. These circuit breakers are intended for use in aircraf
33、t with electrical supplies in accordance with EN 2282 (all categories). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated refere
34、nces, the latest edition of the referenced document (including any amendments) applies. EN 2083, Aerospace series - Copper and copper alloys conductors for electrical cables - Product standard EN 2282, Aerospace series - Characteristics of aircraft electrical supplies EN 2825, Aerospace series - Bur
35、ning behaviour of non metallic materials under the influence of radiating heat and flames - Determination of smoke density EN 2826, Aerospace series - Burning behaviour of non metallic materials under the influence of radiating heat and flames - Determination of gas components in the smoke EN 3841-1
36、00 (all parts), Aerospace series Circuit breakers Test Methods Part 100: General EN 3844-1, Aerospace series - Flammability of non metallic materials - Part 1: Small burner test, vertical - Determination of the vertical flame propagation EN 9133, Aerospace series - Quality management systems - Quali
37、fication procedure for aerospace standard parts TR 6083, Aerospace series Cut-outs for installation of electrical components 1)3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3841-100 apply. 4 Description These circuit breakers are operated by a “push
38、-pull” type single push button (actuator) and with delayed action “trip-free” tripping. Their function is ensured up to the short-circuit current. 1) Published as ASD-STAN Technical Report at the date of publication of this standard. http:/www.asd-stan.org/ EN 2794-001:2014 (E) 5 5 Design 5.1 Materi
39、als 5.1.1 Metallic materials All metallic parts shall be resistant to corrosion or finished against corrosion. When dissimilar materials are in close contact, an adequate protection against corrosion shall be used so that the electromotive force of the galvanic couple does not exceed 0,25 V. When bi
40、metals are used, an eventual corrosion shall not affect the good operation of the circuit breaker. 5.1.2 Insulation materials The insulating parts shall be made of auto-extinguishing or non-flammable materials; they shall not emit damaging or explosive vapours, even in presence of fire or internal e
41、lectric arc. They shall be insensitive to moulds and microorganisms action. Application of any material or protective coating which might crack, break on flake shall be forbidden. Materials which are not specified or which are not specially described shall be as light as possible for the requested u
42、se. Materials shall be selected according to security criteria (toxicity, smoke density) as defined in contractual documents. 5.2 Design 5.2.1 Insulating box The insulating box shall integrate besides the mechanism, the connection and attachment unit. 5.2.2 Free release mechanism Design of circuit b
43、reaker mechanism shall allow free release; i.e. the circuit breaker cuts out in case of overload, and remains cut out even if the actuator is kept by force in engaged position. A new engagement of circuit breaker is only possible after a first total release of the control actuator. The operation in
44、these conditions shall not affect further performances of the circuit breaker. 5.2.3 Attachment All visible parts shall be black coloured and non-reflective. 5.2.4 Electrical connection units They shall be able to receive the lugs. BS EN 2794-001:2014EN 2794-001:2014 (E) 6 5.2.5 Control actuator In
45、engaged position, the visible part of the control actuator shall be of the colour stated in the product standard. In disengaged (or opened) position, the control actuator shall show a white strip. The outer part of this actuator shall be isolated from all undervoltage parts. The control actuator sha
46、ll not stay in a transition position, or give a false indication about the circuit breaker condition. It shall not be removable. When pushing it, power contacts of the circuit breaker engage. When pulling it, power contacts of the circuit breaker open. The circuit breaker rating is indicated in inde
47、lible white colour on the front part of the control actuator. The product standard gives the digits positioning. 5.2.6 Rating inviolability The circuit breaker shall be designed in such a way that the calibration unit cannot be reached without breaking a sealing. 5.2.7 Leakage lines The leakage line
48、s and the minimal space to be foreseen between the undervoltage parts and any other part of the circuit breaker made of non-insulating material, as well as between the undervoltage parts of opposite polarity, shall be sufficient to avoid any default or arcing in all uses and climatic conditions. 5.2
49、.8 Protection against non-release Electrical overload happening on a circuit breaker locked in its engaged position (sticked contacts or non-operating release mechanism), shall cause the opening of the circuit by circuit breaker destruction without any fire or important smoke release. 6 Characteristics 6.1 General characteristics See Table 1. BS EN 2794-001:2014EN 2794-001:2014 (E) 6 5.2.5 Control actuator In engaged position, the visible part of the control actuator shall be of the colour stated in the product standard. In disengaged (or opened) p
