1、BRITISH STANDARDBS EN 2996-001:2006Aerospace series Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A Part 001: Technical specificationThe European Standard EN 2996-001:2006 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56
2、g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 2996-001:2006This British Standard was published und
3、er the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 2007ISBN 978 0 580 50012 1National forewordThis British Standard was published by BSI. It is the UK implementation of EN 2996-001:2006.The UK participation in its preparation was entrusted by Technical Committee A
4、CE/6, Aerospace avionic electrical and fibre optic technology, to Panel ACE/6/-/5, Aerospace Protection for electrical systems.A list of organizations represented on ACE/6/-/5 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a c
5、ontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEAN STA
6、NDARDNORME EUROPENNEEUROPISCHE NORMEN 2996-001August 2006ICS 49.060English VersionAerospace series - Circuit breakers, three-pole, temperaturecompensated, rated current 1 A to 25 A - Part 001: TechnicalspecificationSrie arospatiale - Disjoncteurs tripolaires compenss entemprature, intensits nominale
7、s 1 A 25 A - Partie 001 :Spcification techniqueLuft- und Raumfahrt - Schutzschalter, dreipolig,Temperaturkompensiert, Nennstrme von 1 A bis 25 A -Teil 001: Technische LieferbedingungenThis European Standard was approved by CEN on 10 May 2006.CEN members are bound to comply with the CEN/CENELEC Inter
8、nal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.T
9、his European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the
10、 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, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United
11、Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2996-001:2006: ELic
12、ensed Copy: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Description .5 5 Design.5 6 Characteristics.6 7 Tests8 8 Qualification tests16 9 Quality assurance19 10 Marking .19 11 Del
13、ivery conditions19 12 Packaging.20 13 Storage20 EN 2996-001:2006Licensed Copy: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI3 Foreword This European Standard (EN 2996-001:2006) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardiz
14、ation (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 Standard shall be g
15、iven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. Attention is drawn to the possibility that some of the elements of this document
16、 may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aust
17、ria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 2996-001:2006Lic
18、ensed Copy: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies the three-pole temperature compensated circuit breakers with signal contacts, polarized or not, rated from 1 A to 25 A and used in aircraft on-board circuits. It describes specif
19、ic 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 references The fol
20、lowing 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 copper alloy conduct
21、ors 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. 1)EN 2826 Aerospace series Bur
22、ning behaviour of non metallic materials under the influence of radiating heat and flames Determination of gas components in the smoke. 1)EN 3841-100*, Aerospace series Circuit breakers Test Methods Part 100: General. EN 3844-1, Aerospace series Flammability of non metallic materials Part 1: Small b
23、urner test, vertical Determination of the vertical flame propagation.1)EN 9133, Aerospace series Quality management systems Qualification Procedure for Aerospace Standards Parts. TR 6083, Aerospace series Cut-outs for installation of electrical components. 2)MIL-I-81969/1A, Installing and removal to
24、ols, connector electrical contact, type III, class 2, composition C. 3)MIL-I-81969/14C, Installing and removal tools, connector electrical contact, type III, class 2, composition B.3)3 Terms and definitions For the purposes of this standard, the terms and definitions given in EN 3841-100 apply. *And
25、 all its parts quoted. 1) Published as AECMA Prestandard at the date of publication of this standard. 2) Published as AECMA Technical Report at the date of publication of this standard. 3) Published by: Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA. EN 2996-001:2006Licensed Co
26、py: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI5 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. 5 Design 5.
27、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 adequate protection against corrosion shall be used so that the electromotive force of the galvanic couple does not exceed 0,25 V.
28、 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 auto-extinguishing or non-flammable materials; they shall not emit damaging or explosive vapours, even in presence of fire or in
29、ternal 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 shall be forbidden. Materials which are not specified or which are not specially described shall be as light as possible for the re
30、quested 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 insulating box shall integrate besides the mechanism, the connection and attachment unit. 5.2.2 Free release mechanism Design of
31、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 engaged position. A new engagement of circuit breaker is only possible after a first total release of the control actuator. The oper
32、ation in 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 (or contacts). EN 2996-001:2006Licensed Copy: Wang Bin, na,
33、Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI6 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. The outer par
34、t 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 the circuit breaker engage and indicating cont
35、act opens. When pulling it, power contacts of the circuit breaker open and indicating contact closes. 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
36、 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 lines 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 wel
37、l as between the undervoltage parts of opposite polarity, shall be sufficient to avoid any default or arc tracking 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 non-oper
38、ating 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. EN 2996-001:2006Licensed Copy: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy,
39、(c) BSI7 Table 1 General characteristics Designation Requirements Assembly See product standard. Mass See product standard. Operational altitude See product standard. Power contact connection 3 input terminals on power supply side (identified by digit A1, B1, C1) 3 output terminals on distribution s
40、ide (identified by digit A2, B2, C2) See product standard. Signal contact connection, circuit closed when circuit breaker is released Crimp contacts size 20 See product standard. Operational ambient temperatures limits From 55 C to 125 C Rating 1 A to 15 A From 55 C to 125 C Temperature compensation
41、 Rating 20 A and 25 A From 55 C to 90 C See product standard. Rating marking On control actuator (indelible white) 6.2 Ratings See product standard. 6.3 Nominal voltage of main contacts See product standard. 6.4 Signal contact performances See Table 2. Table 2 Signal contact performances Type of loa
42、d 28 V d.c. 5 V d.c. 5 V a.c. a28 V d.c. Resistive 0,5 A 3 mA Not used 3 mA Signal contact Lamp 0,2 A Not used 0,23 A Not used aApplicable on version without diode only. NOTE 1 The circuit breaker status signalling function, open or closed shall be guaranteed after all the tests described in this sp
43、ecification. NOTE 2 In order to avoid any deterioration of the signalization circuit (contact and diode), the reception electrical test could be performed without exceeding the value recommended of 60 mW max. at 28 V d.c. max. (resistive load). EN 2996-001:2006Licensed Copy: Wang Bin, na, Thu Apr 05
44、 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI8 6.5 Dimensional characteristics See product standard. 6.6 Recommended panel mounting dimensions Panel cut-out : The panel cut-out is in accordance with the designation TR6083C202. Spacing : 50 mm horizontal and 40 mm vertical from the centres of
45、the mounting holes. Panel thickness : 1 mm to 3 mm. 7 Tests 7.1 Mechanical tests See Table 3. Table 3 Mechanical tests Tests Requirements Visual check See EN 3841-201. Closing force (push) 8 N to 80 N Operational force Opening force (pull) See EN 3841-502. 5 N to 30 N Travel See EN 3841-501. For val
46、ue, see product standard. Transverse load 110 N Push 110 N Actuator Longitudinal load Pull See EN 3841-503. 110 N Tightening torque 5 N.m Attachment nut Rotation torque See EN 3841-504. 3 N.m Screw tightening torque 2 N.m Tensile force as per F1(see Figure 1 in product standard). 110 N Main contact
47、connection Pressure force as per F2(see Figure 1 in product standard). See EN 3841-505. 55 N See product standard. Insertion force Insertion possible without tools 6 N Extraction force See EN 3841-509. 15 N Contact retention force (pre-load 13,5 N) See EN 3841-510. 67 N shift 0,3 mm Radial load See
48、EN 3841-510. 30 N Mechanical strength Signal contact connection (size 20) Recommended tools: - plastic: MIL-I-81969/14-11 - metallic: MIL-I-81969/1-02 See MIL-I-81969/1A and MIL-I-81969/14C. EN 2996-001:2006Licensed Copy: Wang Bin, na, Thu Apr 05 02:50:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI9
49、7.2 Environmental tests See Table 4. Table 4 Environmental conditions Tests Requirements 5 Hz to 80 Hz - Constant amplitude 2 a = 0,76 mm 80 Hz to 500 Hz - Constant acceleration = 10 gnSinusoidal (see Figure 1). Duration: circuit 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. 500 Hz to 2 000 Hz - Constant acceleration
