1、AECMA STANDARD NORME AECMA AECMA NORM prEN 3662-001 Edition P 3 May 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: 49.060 Supersedes edition P 2 January 1999 D
2、escriptors: ENGLISH VERSION Aerospace series Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A Part 001: Technical specification Srie arospatiale Disjoncteurs tripolaires compenss en temprature, intensits nominales 20 A 50 A Partie 001 : Spcification technique Luft- u
3、nd Raumfahrt Schutzschalter, dreipolig, Temperaturkompensiert, Nennstrme von 20 A bis 50 A Teil 001: Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is p
4、ublished 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 not be changed to an extent that interchangeability is affected
5、, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full Europ
6、ean 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 publication 31 May 2005 Comments should be sent within six months aft
7、er the date of publication to AECMA-STAN Electrical Domain Copyright 2005 by AECMA-STAN prEN 3662-001:20052 Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of AECMA-STAN defin
8、ed in AECMA-STANs General Process Manual, this standard has received approval for Publication. Contents Page 1 Scope . 3 2 Normative references 3 3 Terms and definitions . 4 4 Description 4 5 Design . 4 6 Characteristics 5 7 Tests 7 8 Qualification tests 15 9 Quality assurance 18 10 Marking 18 11 De
9、livery conditions 19 12 Packaging . 19 13 Storage. 19 prEN 3662-001:20053 1 Scope This standard specifies the three-pole temperature compensated circuit breakers with signal contacts, polarized or not, rated from 20 A to 50 A and used in aircraft on-board circuits. It describes specific environmenta
10、l, 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 following referenc
11、ed 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 conductors for electri
12、cal 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 Burning behaviour
13、of non metallic materials under the influence of radiating heat and flames Determination of gas components in the smoke.1)EN 3662-005, Aerospace series Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A Part 005: With polarized signal contact Product standard.1)EN 3662
14、-006, Aerospace series Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A Part 006: With polarized signal contact Bus-bar version Product standard.1)EN 3841-100, Aerospace series Circuit breakers Test Methods Part 100: General. EN 3844-1, Aerospace series Flammability
15、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 Aerospace Standards Parts. TR 6083, Aerospace series Cut-outs for installation of electrical components.2)M
16、IL-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 III, class 2, composition B.3) And all its parts quoted. 1) Published as AECMA Prestandard at the date of pu
17、blication 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. prEN 3662-001:20054 3 Terms and definitions For the purposes of this document, the terms and definiti
18、ons given in EN 3841-100 apply. 4 Description These circuit breakers are operated by a “push-pull“ type single pushbutton (actuator) and with delayed action “trip-free“ tripping. Their function is assured up to the short-circuit current. 5 Design 5.1 Materials 5.1.1 Metallic materials All metallic p
19、arts 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. When bimetals are used, an eventual corrosion shal
20、l 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 internal electric arc. They shall be insensitive to m
21、oulds and micro-organisms 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
22、 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 circuit breaker mechanism shall allow free release
23、; 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 operation in these conditions shall not affect further
24、 performances of the circuit breaker. 5.2.3 Attachment All visible parts shall be black coloured and non-reflective. prEN 3662-001:20055 5.2.4 Electrical connection units They shall be able to receive the lugs (or contacts). 5.2.5 Control actuator In engaged position, the visible part of the control
25、 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 from all under voltage parts. The control actuator shall not stay in a transition position, or give a
26、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 contacts of the circuit breaker open and indicating contact closes. The circuit breaker rating is indica
27、ted 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 way that the calibration unit cannot be reached without breaking a sealing. 5.2.7 Leakage lines The l
28、eakage lines and the minimal space to be foreseen between the under voltage parts and any other part of the circuit breaker made of non-insulating material, as well as between the under voltage parts of opposite polarity, shall be sufficient to avoid any default or arc tracking in all uses and clima
29、tic 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 the opening of the circuit by circuit breaker destruction without any fire or important smoke rele
30、ase. 6 Characteristics 6.1 General characteristics See Table 1. prEN 3662-001:20056 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
31、 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 on release Crimp contacts size 20 See product standard. Operational ambient temperatures limits From
32、 55 C to 90 C Temperature compensation 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 perform
33、ances 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 status signalling function, open or closed shall be guaranteed after all the tests des
34、cribed 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 mW max. at 28 V d.c. max. (resistive load). prEN 3662-001:20057 6.5 Dimensional ch
35、aracteristics See product standard. 6.6 Recommended panel mounting dimensions Panel cut-out : The panel cut-out is in accordance with the designations TR6083C202 (for EN 3662-005) and TR6083C400 (for EN 3662-006). Spacing : 60 mm horizontal and 45 mm vertical from the centers of the mounting holes.
36、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) 20 N to 80 N Operational force Opening force (pull) See EN 3841-502. 5 N to 45 N Travel See EN 3841-501. For value, see product sta
37、ndard. Transverse load 110 N Push 110 N Actuator Longitudinal load Pull See EN 3841-503. 110 N Tightening torque 5,5 N.m Attachment nut Rotation torque See EN 3841-504. 3 N.m Screw tightening torque 2,5 N.m Tensile force as per F1(see Figure 1 in product standard). 110 N Main contact connection Pres
38、sure 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 EN 3841-510. 30
39、 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. prEN 3662-001:20058 7.2 Environmental tests See Table 4. Table 4 Environmental conditions Tests Requirements 5 Hz to 80 Hz -
40、 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
41、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 - Constant accelerati
42、on = 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 cycles/axis; - no load - Tw
43、o 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 - Applicab
44、ility: 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 “opened“ position; - Two cycles/axis - 1 octave/min. See EN 3841-511. 54 Hz to 2 000 Hz - Constant accele
45、ration = 3 gnMechanical shocks (see notes) 50 gn- 11 ms - half sine wave See EN 3841-507. Constant accelerations See product standard. Sand and dust See product standard. continued prEN 3662-001:20059 Table 4 Environmental conditions (concluded) Tests Requirements Corrosion (salt spray) See EN 3841-
46、402 category S. Humidity See EN 3841-403 category A. Explosion-proofing See product standard. Contaminating liquids Cleaning and extinguishing products See EN 3841-405. Flammability (glow wire test) See EN 3841-406. Inflammability See test EN3844-1B. Smoke density See test EN2825A or B. Toxicity See
47、 test EN2826B. Overvoltage caused by lightning only on main contacts See EN 3841-308. Requirement: no tripping NOTE 1 Vibration 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 vibra
48、tion 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 all). NOTE 4 Circuit breaker in the closed position = main cont
49、acts closed and auxiliary contacts opened. Circuit breaker in the opened position = main contacts opened and auxiliary contacts closed. NOTE 5 Any additional vibration testing (e.g. Sustained Engine Imbalance) shall be contractually agreed between users and manufacturers. prEN 3662-001:200510 Key 1 Peak to peak amplitude (mm) 2 Frequency (Hz) NOTE The identification G-PK corresponds to peak gn Figure 1 Sinusoidal vibrations prEN 3662-001:200511 Key
