1、BSI Standards PublicationBS EN 3774-001:2014Aerospace series Circuitbreakers, three-pole,temperature compensated,rated currents 1 A to 25 APart 001: Technical specificationBS EN 3774-001:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3774-001:2014.It super
2、sedes BS EN 3774-001:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can beobtained on request to its secretary.This publication doe
3、s not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 83453 0ICS 49.060Compliance with a British Standard cannot confer immunity fromlegal obli
4、gations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2014.Amendments issued since publicationDate Text affectedBS EN 3774-001:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3774-001 October 2014 ICS 49.060 Supersedes EN
5、 3774-001:1999English Version Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 001: Technical specification Srie arospatiale - Disjoncteurs tripolaires compenss en temprature, intensits nominales 1 A 25 A - Partie 001 : Spcification techniqu
6、e Luft- und Raumfahrt - Schutzschalter, dreipolig, temperaturkompensiert, Nennstrme von 1 A bis 25 A - Teil 001: Technische Lieferbedingungen This European Standard was approved by CEN on 12 October 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the c
7、onditions 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard ex
8、ists 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national s
9、tandards bodies of 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, Portugal, Romania, Slovakia,
10、 Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means res
11、erved worldwide for CEN national Members. Ref. No. EN 3774-001:2014 EBS EN 3774-001:2014EN 3774-001:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Description .4 5 Design .5 6 Characteristics .6 7 Tests 7 8 Qualification tests . 15 9 Quality assur
12、ance . 19 10 Marking 19 11 Delivery conditions . 19 12 Packaging 19 13 Storage . 19 BS EN 3774-001:2014EN 3774-001:2014 (E) 3 Foreword This document (EN 3774-001:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and vo
13、tes 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 Standard shall be given the status of a national standard,
14、either by publication of an identical text or by endorsement, at the latest by April 2015, and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/
15、or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 3774-001:1999. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria
16、, 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, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
17、Switzerland, Turkey and the United Kingdom. BS EN 3774-001:2014EN 3774-001:2014 (E) 4 1 Scope This European Standard specifies the three-pole temperature compensated circuit breakers, rated from 1 A to 25 A used in aircraft on-board circuits. It describes specific environmental, electrical and mecha
18、nical 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. 2 Normative references The following documents, in whole or in part, are normatively
19、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) applies. EN 2083, Aerospace series Copper or copper alloy conductors for elect
20、rical 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, Aerospace series Burning behaviour of
21、 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: General EN 3844-1, Aerospace series Flammability of non metallic materials Part 1: Small burner test
22、, 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-outs for installation of electrical components 1)3 Terms and definitions For the purposes of this documen
23、t, 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) Published as ASD-STAN Technical R
24、eport at the date of publication of this standard. http:/www.asd-stan.org/ BS EN 3774-001:2014EN 3774-001:2014 (E) 5 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 ad
25、equate 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
26、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 micro-organisms action. Application of any material or protective coating, which might crack, break on flake sh
27、all 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. 5.2 Design 5.2.1 Insulating box The
28、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 circuit breaker cuts out in case of overload, and remains cut out even if the actuator is kept by force in eng
29、aged 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 the circuit breaker. 5.2.3 Attachment All visible parts shall be black colored and non-reflective. 5.2.4
30、 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 product standard. In disengaged (or opened) position, the control actuator shall show a white strip. BS EN 37
31、74-001:2014EN 3774-001:2014 (E) 6 The outer part of this actuator shall be isolated from all undervoltage parts. The control actuator shall 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
32、 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 standard gives the digits positioning. 5.2.6 Rating inviolability The circuit breaker sha
33、ll 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 clearances, creepage distances and the minimal space to be foreseen between the energized parts and any other part of the circuit breaker made of conductiv
34、e material, as well as between the energized parts of opposite polarity, shall be sufficient to avoid any default or arcing in all uses and climatic conditions. 5.2.8 Protection against non-release Electrical overload happening on a circuit breaker locked in its engaged position (sticked contacts or
35、 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. Table 1 General characteristics Designation Requirements Assembly See product standard. Mas
36、s See product standard. Operational altitude See product standard. 3 input terminals on power supply side (identified by digit A1, B1, C1) See product standard. 3 output terminals on distribution side (identified by digit A2, B2, C2) Operational ambient temperatures limits From 55 C to 125 C Tempera
37、ture compensation Rating 1 A to 15 A From 55 C to 125 C See product standard. Rating 20 A and 25 A From 55 C to 90 C Rating marking On control actuator (indelible white) BS EN 3774-001:2014EN 3774-001:2014 (E) 7 6.2 Ratings See product standard. 6.3 Nominal voltage of operational circuits See produc
38、t standard. 6.4 Dimensional characteristics See product standard. 6.5 Recommended panel mounting dimensions Panel cut-out : The panel cut-out is in accordance with the designation TR6083C202. Spacing : 50 mm horizontal and 30 mm vertical from the centre of the mounting holes. Panel thickness : 1 mm
39、to 3 mm. 7 Tests 7.1 Mechanical tests See Table 2. Table 2 Mechanical characteristics Tests Requirements Visual check EN 3841-201 Operational force Closing force (push) EN 3841-502 8 N to 80 N Opening force (pull) 5 N to 30 N Mechanical strength Actuator Travel EN 3841-501 For value, see product sta
40、ndard. Transverse load EN 3841-503 110 N Longitudinal load Push 110 N Pull 110 N Attachment nut Tightening torque EN 3841-504 5 N.m Rotation torque 3 N.m Main contact connection Screw tightening torque EN 3841-505 2 N.m Tensile force as per F1(see Figure 1 in product standard). 110 N Pressure force
41、as per F2(see Figure 1 in product standard). 55 N BS EN 3774-001:2014EN 3774-001:2014 (E) 8 7.2 Environmental tests See Table 3. Table 3 Environmental conditions (1 of 2) Tests Requirements Combined tests. Ambient temperature 70 C and vibrations (see notes). Sinusoidal (see Figure 1). Duration: circ
42、uit breaker in the “closed“ position; 0,9 nload Seven cycles/axis 1 octave/min; no load Two cycles/axis 1 octave/min. circuit breaker in the “opened“ position; two cycles/axis 1 octave/min. See EN 3841-506. 5 Hz to 80 Hz Constant amplitude 2 a = 0,76 mm 80 Hz to 500 Hz Constant acceleration = 10 gn5
43、00 Hz to 2 000 Hz Constant acceleration = 5 gnRandom (see Figure 2). Duration: circuit breaker in the “closed“ position; 0,9 nload 15 min/axis; no load 15 min/axis. circuit breaker in the “opened“ position; 15 min/axis. 10 Hz to 2 000 Hz Constant acceleration = 5,8 gnLow frequencies (see Figure 3).
44、Applicability: see product standard. Duration: circuit breaker in the “closed“ position; 0,9 nload Two cycles/axis; no load Two cycles/axis. circuit breaker in the “opened“ position; two cycles/axis. 10 Hz to 27 Hz to 10 Hz Constant acceleration = 10 gn10 Hz to 5 Hz Constant acceleration = 3,5 gnCom
45、bined tests. Ambient temperature 85 C, cabin max. altitude 4 600 m and vibrations (see notes). Sinusoidal Applicability: see product standard. Duration: circuit breaker in the “closed“ position; 0,9 nload Four cycles/axis 1 octave/min; no load Two cycles/axis 1 octave/min. circuit breaker in the “op
46、ened“ position; two cycles/axis 1 octave/min. See EN 3841-511. 5 Hz to 54 Hz Constant shift 2 a = 0,5 mm 54 Hz to 2 000 Hz Constant acceleration = 3 gnBS EN 3774-001:2014EN 3774-001:2014 (E) 9 Table 3 Environmental conditions (2 of 2) Tests Requirements Mechanical shocks (see notes) 50 gn 11 ms Half
47、 sine wave See EN 3841-507. Constant accelerations See product standard. Sand and dust See product standard. Corrosion (salt spray) See EN 3841-402, category S. Humidity See EN 3841-403, category A. Explosion-proofing See product standard. Contaminating liquids Cleaning and extinguishing products Se
48、e EN 3841-405. Flammability (glow wire test) See EN 3841-406. Inflammability See test EN 3844-1, code B. Smoke density See test EN 2825, code A or code B. Toxicity See test EN 2826, code B. Overvoltage caused by lightning only on main contacts See EN 3841-308. Requirement: no tripping NOTE 1 Vibrati
49、on tests performed on circuit breakers in closed position without load and in opened position, are carried out in order to detect contact opening and closure. NOTE 2 For vibration and shock tests, the contact-opening or contact-closure shall be less than or equal to 10 s on the power and the signal contacts. NOTE 3 Shock tests are performed one on each way for each of the three directions (i.e. six shocks in a
