1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Aerospace series - Arc Fault Circuit breakers, single-pole, temperature compensated, rated current 3 A to 25 A - 115 V a.c. 400 Hz Constant FrequencyPart 001: Technical specificationBS EN 4838001:2018EUROPEAN STANDARD N
2、ORME EUROPENNE EUROPISCHE NORM EN 4838-001 August 2018 ICS 49.060 English Version Aerospace series - Arc Fault Circuit breakers, single-pole, temperature compensated, rated current 3 A to 25 A - 115 V a.c. 400 Hz Constant Frequency - Part 001: Technical specification Srie arospatiale - Disjoncteurs
3、unipolaires dtection darc compenss en temprature, intensits nominales 3 A 25 A - 115 V a.c. 400 Hz frquence fixe - Partie 001: Spcification technique Luft- und Raumfahrt - Arc Fault Schutzschalter, einpolig, Temperaturkompensiert, Nennstrme von 3 A bis 25 A - 115 V a.c. 400Hz Konstantfrequenz - Teil
4、 001: Technische Lieferbedingungen This European Standard was approved by CEN on 27 November 2017. 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-t
5、o-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 language made by transla
6、tion 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, Denmark, Estonia, Finland,
7、 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 COMMITTEE FOR STANDARDI
8、ZATION 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 4838-001:2018 ENational forewordThis Bri
9、tish Standard is the UK implementation of EN 4838001:2018. 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 to its secretary.Thi
10、s 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 0 580 51080 9ICS 49.060Compliance with a British Standard cannot confer immu
11、nity 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 STANDARDBS EN 4838001:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
12、 4838-001 August 2018 ICS 49.060 English Version Aerospace series - Arc Fault Circuit breakers, single-pole, temperature compensated, rated current 3 A to 25 A - 115 V a.c. 400 Hz Constant Frequency - Part 001: Technical specification Srie arospatiale - Disjoncteurs unipolaires dtection darc compens
13、s en temprature, intensits nominales 3 A 25 A - 115 V a.c. 400 Hz frquence fixe - Partie 001: Spcification technique Luft- und Raumfahrt - Arc Fault Schutzschalter, einpolig, Temperaturkompensiert, Nennstrme von 3 A bis 25 A - 115 V a.c. 400Hz Konstantfrequenz - Teil 001: Technische Lieferbedingunge
14、n This European Standard was approved by CEN on 27 November 2017. 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
15、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 language made by translation under the responsibility of
16、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, Denmark, Estonia, Finland, Former Yugoslav Republic of Mace
17、donia, 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 COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISA
18、TION 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 4838-001:2018 EBS EN 4838001:2018EN 4838-001:2018 (E) 2 Contents Page Eur
19、opean foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 5 4 Description 5 5 Design 5 6 Characteristics . 7 7 Tests . 8 8 Qualification tests 16 9 Quality assurance . 20 10 Marking 20 11 Delivery conditions . 20 12 Packaging 20 13 Storage . 20 BS EN 4838001:2018EN 4838-001:201
20、8 (E) 3 European foreword This document (EN 4838-001:2018) 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, this Standard has received the approval of
21、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 the latest by February 2019, and conflicting
22、 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 patent rights. According to the CEN-CENELEC I
23、nternal 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, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland
24、, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. BS EN 4838001:2018EN 4838-001:2018 (E) 4 1 Scope This European Standard specifies the single-pole temperature com
25、pensated arc fault circuit breakers with or without signal contacts, rated from 3 A to 25 A and used in aircraft on-board circuits. In any operating state a “trip-free“ tripping is ensured. These items are designed to protect aircraft wiring system from circuit overload and arc faults. It describes
26、specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100. If the design of the arc fault circuit breakers contains software or complex hardware, as a minimum, the software and hardware shall be developed in a
27、ccordance with EUROCAE ED-12B or C / RTCA DO-178B or C, DAL C and EUROCAE ED-80 / RTCA DO-254, DAL C, respectively. These arc fault circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282. 2 Normative references The following documents are referred to in
28、 the text in such a way that some or all of their content constitutes 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 2083, Aerospace series Copper and co
29、pper alloys conductors for electrical cables Product standard EN 2266-003, Aerospace series Cables, electrical, for general purpose Operating temperatures between 55 C and 200 C Part 003: Ink jet printable Product standard EN 2282, Aerospace series Characteristics of aircraft electrical supplies EN
30、2825, Aerospace series Burning 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
31、 the smoke EN 3841-100 (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 Procedure Quality Mana
32、gement Systems Qualification for Aerospace Standard Products MIL-I-81969/1-02, Installing and removal tools, connector electrical contact, Type III, Class 2, composition C 1) MIL-I-81969/14-11, Installing and removal tools, connector electrical contact, Type III, Class 2, composition B 1) EUROCAE ED
33、-14E / RTCA DO-160E, Environmental conditions and test procedures for airborne equipment 2)EUROCAE ED-12B or C / RTCA DO-178B or C, Software Consideration in Airborne Systems and Equipment Certification 2)1) Published by: DoD National (US) Mil. Department of Defense http:/www.defenselink.mil/ 2) Pub
34、lished by: EUROCAE Regional (EU) EURopean Organisation for Civil Aviation Equipment http:/www.eurocae.org/ BS EN 4838001:2018EN 4838-001:2018 (E) 5 EUROCAE ED-80 / RTCA DO-254, Design Assurance Guidance for Electronic Hardware 2)AS 5692, Aerospace Standard Arc Fault Circuit Breaker (AFCB) Aircraft,
35、Trip-Free, Single Phase 115 V a.c.-400Hz Constant Frequency 3)3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3841-100 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: availa
36、ble at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 4 Description These arc fault circuit breakers are operated by a “push-pull“ type single pushbutton (actuator). In case of thermal overload or arc fault, electrical contacts must open. In both cases t
37、ripping time is related according to the type of default. In any operating state a “trip-free“ tripping is ensured. 5 Design 5.1 Materials 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 ade
38、quate protection against corrosion shall be used so that the electromotive force of the galvanic couple does not exceed 0,25 V. When bimetals 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 a
39、uto-extinguishing or non-flammable materials; they shall not emit damaging or explosive vapours, even in presence of fire or internal electric arc. They shall be insensitive to moulds and micro-organisms action. Application of any material or protective coating, which might crack, break or flake sha
40、ll be forbidden. Materials which are not specified or which are not specially described shall be as light as possible for the requested use. Materials shall be selected according to security criteria (toxicity, smoke density) as defined in contractual documents. 3) Published by: SAE National (US) So
41、ciety of Automotive Engineers http:/www.sae.org/ BS EN 4838001:2018EN 4838-001:2018 (E) 6 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 breaker mechanism shall allow free re
42、lease; 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 these conditions shall not affect fu
43、rther 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 (or contacts). 5.2.5 Control actuator In engaged position, the visible part of the control actuator shall
44、 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 energized parts. The control actuator shall not stay in a transition position, or give a false indication ab
45、out the circuit breaker condition. It shall not be removable. When pushing it, power contacts of the circuit breaker engage and indicating contact opens. When pulling it, power contacts of the circuit breaker open and indicating contact closes. The circuit breaker rating is indicated in indelible wh
46、ite 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 Clearances and creepage distances The
47、clearances, creepage distances and the minimal space to be foreseen between the energized parts and any other part of the circuit breaker made of conductive material, as well as between the energized parts of opposite polarity, shall be sufficient to avoid any default or arcing in all uses and clima
48、tic conditions. BS EN 4838001:2018EN 4838-001:2018 (E) 7 5.2.8 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
49、 without any fire or important smoke release. 5.2.9 Safety and reliability The arc fault protection must never inhibit the thermal overload protection. 6 Characteristics 6.1 General characteristics See Table 1. Table 1 General characteristics Designation Requirements Assembly See product standard. Mass See product standard. Operational altitude See product standard. Power contact connection See product standard.1 input terminal on power supply side (identified by digit 1) 1 output ter
