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、g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2996-001:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 2007
3、ISBN 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 ACE/6, Aerospace avionic electrical and fibre optic technology, to Panel ACE/6/-/5, Aerospac
4、e 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 contract. Users are responsible for its correct application.Compliance with a British Standa
5、rd cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2996-001August 2006ICS 49.060English VersionAerospace series - Circuit breakers, three-pole, temperaturecompensated, rated current 1 A to 25 A -
6、 Part 001: TechnicalspecificationSrie arospatiale - Disjoncteurs tripolaires compenss entemprature, intensits nominales 1 A 25 A - Partie 001 :Spcification techniqueLuft- und Raumfahrt - Schutzschalter, dreipolig,Temperaturkompensiert, Nennstrme von 1 A bis 25 A -Teil 001: Technische Lieferbedingung
7、enThis European Standard was approved by CEN on 10 May 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical referen
8、ces concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This 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 it
9、s own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxemb
10、ourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights o
11、f exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2996-001:2006: E2 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 assura
12、nce19 10 Marking .19 11 Delivery conditions19 12 Packaging.20 13 Storage20 EN 2996-001:20063 Foreword This European Standard (EN 2996-001:2006) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accor
13、dance 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, either by publication of
14、 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 may be the subject of patent rights. CEN and/or CENELEC shall n
15、ot 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: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland,
16、 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 2996-001:20064 1 Scope This standard specifies the three-pole temperature compen
17、sated circuit breakers with signal contacts, polarized or not, rated from 1 A to 25 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 circu
18、it breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282 (all categories). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated refer
19、ences, the latest edition of the referenced document (including any amendments) applies. EN 2083, Aerospace series Copper or copper alloy conductors for electrical cables Product standard. EN 2282, Aerospace series Characteristics of aircraft electrical supplies. EN 2825, Aerospace series Burning be
20、haviour of non metallic materials under the influence of radiating heat and flames Determination of smoke density. 1)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. 1)EN 3841-100*, Aer
21、ospace 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.1)EN 9133, Aerospace series Quality management systems Qualification Procedure for Aer
22、ospace Standards Parts. TR 6083, Aerospace series Cut-outs for installation of electrical components. 2)MIL-I-81969/1A, Installing and removal tools, connector electrical contact, type III, class 2, composition C. 3)MIL-I-81969/14C, Installing and removal tools, connector electrical contact, type II
23、I, 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 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
24、 publication of this standard. 3) Published by: Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA. EN 2996-001:20065 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 i
25、s assured up to the short-circuit current. 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 adequate protection against corrosion shall be used so that the electromotiv
26、e 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 auto-extinguishing or non-flammable materials; they shall not emit damagin
27、g 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 shall be forbidden. Materials which are not specified or which are not specia
28、lly 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 insulating box shall integrate besides the mechanism, the connection and at
29、tachment 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 engaged position. A new engagement of circuit breaker is only possible after a
30、 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 coloured and non-reflective. 5.2.4 Electrical connection units They shall be able to receive the lugs (or co
31、ntacts). EN 2996-001:20066 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 part of this actuator shall be isolated
32、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 contact opens. When pulling it, power con
33、tacts 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 breaker shall be designed in such a
34、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 well as between the undervoltage parts o
35、f 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-operating release mechanism), shall cause
36、 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 2996-001:20067 Table 1 General characteristics Designation Requirements Assembly See product standard. Mass See product standard. Oper
37、ational 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 side (identified by digit A2, B2, C2) See product standard. Signal contact connection, circuit closed when circuit breaker is rel
38、eased 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 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 S
39、ee 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 load 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 a
40、Applicable 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 specification. NOTE 2 In order to avoid any deterioration of the signalization circuit (contact and diode), the reception electric
41、al test could be performed without exceeding the value recommended of 60 mW max. at 28 V d.c. max. (resistive load). EN 2996-001:20068 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 designati
42、on TR6083C202. Spacing : 50 mm horizontal and 40 mm vertical from the centres of 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
43、Opening force (pull) See EN 3841-502. 5 N to 30 N Travel See EN 3841-501. For value, 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
44、.m Tensile force as per F1(see Figure 1 in product standard). 110 N Main contact 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 rete
45、ntion force (pre-load 13,5 N) See EN 3841-510. 67 N shift 0,3 mm Radial load See 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 2996-001:20069 7.2 Enviro
46、nmental 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
47、; - 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 = 5 gnRandom (see Figure 2). Duration: circuit breaker in the “closed“ position; - 0,9 nload - 15 min/axis; - no load - 15 min/axis. ci
48、rcuit breaker in the “opened“ position; - 15 min/axis. 10 Hz to 2 000 Hz - Constant acceleration = 5,8 gn10 Hz to 27 Hz to 10 Hz - Constant acceleration = 10 gnCombined tests Ambient temperature 70 C and vibrations (see notes). Low frequencies (see Figure 3). Applicability: see product standard. Dur
49、ation: 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. See EN 3841-506. 10 Hz to 5 Hz - Constant acceleration = 3,5 gn5 Hz to 54 Hz - Constant shift2 a = 0,5 mm Combined 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 “clo
