ASD-STAN PREN 2794-001-2012 Aerospace series Circuit breakers single-pole temperature compensated rated current 20 A to 50 A Part 001 Technical specification (Edition P 2).pdf
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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 2794-001 Edition P 2 February 2012 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: Supersedes editio
2、n P 1 of May 1994 and will supersede EN 2794-001:1999Descriptors: ENGLISH VERSION Aerospace series Circuit breakers, single-pole, temperature compensated, rated current 20 A to 50 A Part 001: Technical specification Srie arospatiale Disjoncteurs unipolaires compenss en temprature, intensits nominale
3、s 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 “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defenc
4、e Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall n
5、ot be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Stand
6、ardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publicati
7、on 29 February 2012 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2012 by ASD-STAN prEN 2794-001:2012 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Terms and definitions .3 4 Description .3 5 Design .4 6 Characte
8、ristics .5 7 Tests 6 8 Qualification tests 14 9 Quality assurance 18 10 Marking .18 11 Delivery conditions 18 12 Packaging .18 13 Storage 18 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance wit
9、h the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 2794-001:2012 (E) 3 1 Scope This standard specifies the single-pole temperature compensated circuit breakers rated from 20 A to 50 A and used in aircraft on-board circuits.
10、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 Normative
11、 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 2083, Aerospace series Copper or c
12、opper alloy 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 and flames Determination of smoke density EN 2826, Aeros
13、pace 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: GeneralEN 3844-1, Aerospace series Flammability of non metallic mate
14、rials Part 1: Small burner test, vertical Determination of the vertical flame propagation 1)EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standards TR 6083, Aerospace series Cut-outs for installation of electrical components 2)3 Terms and definitions For
15、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“ tripping. Their function is assured up to the short-circuit current. 1) Publi
16、shed as ASD-STAN Prestandard at the date of publication of this standard (www.asd-stan.org). 2) Published as ASD-STAN Technical Report at the date of publication of this standard (www.asd-stan.org). prEN 2794-001:2012 (E) 4 5 Design 5.1 Materials 5.1.1 Metallic materials All metallic parts shall be
17、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 bimetals are used, an eventual corrosion shall not affect t
18、he 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 electric arc. They shall be insensitive to moulds and micr
19、oorganisms 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 use. Materials shall be selected according to security cri
20、teria (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 breaker mechanism shall allow free release; i.e. the circu
21、it 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 further performances of
22、 the circuit breaker. 5.2.3 Attachment All visible parts shall be black colored and non-reflective. 5.2.4 Electrical connection units They shall be able to receive the lugs. 5.2.5 Control actuator In engaged position, the visible part of the control actuator shall be of the colour stated in the prod
23、uct 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. prEN 2794-001:2012 (E) 5 The control actuator shall not stay in a transition position, or give a false indication about the
24、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 indelible white colour on the front part of the control actuator. The product s
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