1、BRITISH STANDARDBS EN 2995-001:2006Aerospace series Circuit breakers, single-pole, temperature compensated, rated current 1 A to 25 A Part 001: Technical specificationThe European Standard EN 2995-001:2006 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g5
2、6g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2995-001:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 200
3、7ISBN 978 0 580 50009 1National forewordThis British Standard was published by BSI. It is the UK implementation of EN 2995-001:2006.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, Aerospa
4、ce 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 Stand
5、ard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2995-001August 2006ICS 49.060English VersionAerospace series - Circuit breakers, single-pole, temperaturecompensated, rated current 1 A to 25 A
6、 - Part 001: TechnicalspecificationSrie arospatiale - Disjoncteurs unipolaires compenss entemprature, intensits nominales 1 A 25 A - Partie 001 :Spcification techniqueLuft- und Raumfahrt - Schutzschalter, einpolig,Temperaturkompensiert, Nennstrme von 1 A bis 25 A -Teil 001: Technische Lieferbedingun
7、genThis 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 refere
8、nces 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 i
9、ts 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, Luxem
10、bourg, 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
11、of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2995-001:2006: 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 assur
12、ance19 10 Marking .19 11 Delivery conditions19 12 Packaging.20 13 Storage20 EN 2995-001:20063 Foreword This European Standard (EN 2995-001:2006) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in acco
13、rdance 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 o
14、f an identical text or by endorsement, at the latest by Februray 2007, and conflicting national standards shall be withdrawn at the latest by Februray 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
15、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: 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 2995-001:20064 1 Scope This standard specifies the single-pole temperature comp
17、ensated 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 cir
18、cuit 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 ref
19、erences, 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
20、behaviour 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*, A
21、erospace 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 A
22、erospace 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
23、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 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
24、of publication of this standard. 3) Published by: Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA. EN 2995-001:20065 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
25、 is 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 electromot
26、ive 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 damag
27、ing 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 spe
28、cially 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
29、 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 engaged position. A new engagement of circuit breaker is only possible afte
30、r 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 coloured and non-reflective. EN 2995-001:20066 5.2.4 Electrical connection units They shall be able to re
31、ceive the lugs (or contacts). 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 isolat
32、ed 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
33、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 breaker shall be designed in such
34、 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 well as between the undervoltage part
35、s 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-operating release mechanism), shall ca
36、use 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 2995-001:20067 Table 1 General characteristics Designation Requirements Assembly See product standard. Mass See product standard. O
37、perational altitude See product standard. Power contact connection 1 input terminal on power supply side (identified by digit 1) 1 output terminal on distribution side (identified by digit 2) See product standard.Signal contact connection, circuit closed when circuit breaker is on release Crimp cont
38、acts size 20 See product standard. Operational ambient temperatures limits From 55 C to 125 C Temperature compensation From 55 C to 125 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 stan
39、dard. 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 aApplicable on version without diode only. NOTE 1 The circuit breaker statu
40、s 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 electrical test could be performed without exceeding the value recommended of 60 m
41、W max. at 28 V d.c. max. (resistive load). 6.5 Dimensional characteristics See product standard. EN 2995-001:20068 6.6 Recommended panel mounting dimensions Panel cut-out : The panel cut-out is in accordance with the designation TR6083C202. Spacing : 20 mm horizontal and 40 mm vertical from the cent
42、res 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) 3,5 N to 45 N Operational force Opening force (pull) See EN 3841-502. 5 N to 30 N Travel See EN 3841-501
43、. 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.m Tensile force as per F1(see Figure 1 in product standard). 110 N Main
44、 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 retention force (pre-load 13,5 N) See EN 3841-510. 67 N shift 0,3 mm Radial
45、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 2995-001:20069 7.2 Environmental tests See Table 4. Table 4 Environmental conditions Tests Requir
46、ements 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 “op
47、ened“ 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. circuit breaker in the “opened“ position; - 15 min/axis. 10 Hz to 2 000 Hz
48、 - 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. Duration: circuit breaker in the “closed“ position; - 0,9 nload - Two cycle
49、s/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 “closed“ position; - 0,9 nload - Four cycles/axis - 1 octave/min; - no load - T
