1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4838-001 Edition P 1 September 2016 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Descriptors: EN
2、GLISH VERSION Aerospace series Arc Fault Circuit breakers, single-pole, temperature compensated, rated current 3 A to 25 A 115 V a.c. 400 Hz constant frequency Part 001: Technical specification Luft- und Raumfahrt Arc Fault Schutzschalter, einpolig, Temperaturkompensiert, Nennstrme von 3 A bis 25 A
3、115 V a.c. 400 Hz Konstantfrequenz Teil 001: Technische Lieferbedingungen Srie arospatiale Disjoncteurs unipolaires dtection darc compenss en temprature, intensits nominales 3 A 25 A 115 V a.c. 400 Hz frquence fixe Partie 001 : Spcification technique This “Aerospace Series“ Prestandard has been draw
4、n up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published 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
5、 the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, the ASD-STAN prEN will be
6、submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European 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 withdraw
7、ing any national standards conflicting with the EN. ASD-STAN Technical Committee approves that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary, and its applicability and suitability for any particular use, incl
8、uding any patent infringement arising therefrom, is the sole responsibility of the user.” ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelled. ASD-STAN invites you to send your written comments or any sugg
9、estions that may arise. All rights reserved. No parts of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of ASD-STAN. Order details: E-mail: s
10、alesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1st September 2016 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2016 ASD-STAN prEN 4838-001:2016 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normat
11、ive references 3 3 Terms and definitions . 4 4 Description 4 5 Design 4 6 Characteristics . 6 7 Tests . 7 8 Qualification tests 15 9 Quality assurance . 19 10 Marking 19 11 Delivery conditions . 19 12 Packaging 19 13 Storage . 19 Foreword This standard was reviewed by the Domain Technical Coordinato
12、r of ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4838-001:2016 (E) 3 1 Scope This standard specifies the single-pole temperature comp
13、ensated arc fault circuit breakers with or without signal contacts, rated from 3 A to 25 A and used in aircraft on-board circuits. In any operating state a “trip-free“ tripping is ensured. These items are designed to protect aircraft wiring system from circuit overload and arc faults. It describes s
14、pecific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100. If the design of the arc fault circuit breakers contains software or complex hardware, as a minimum, the software and hardware shall be developed in ac
15、cordance with RTCA DO-178B or C, DAL C and RTCA DO-254, DAL C, respectively. These arc fault 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 referenced in this
16、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 2266-003, Aerospace series Cables, electrical, for general purpose Operating temperat
17、ure between 55 C and 200 C Part 003: Ink jet printable Product standard EN 2282, Aerospace series Characteristics of aircraft electrical supplies EN 3841-100 (all parts), Aerospace series Circuit breakers Test Methods Part 100: General EN 9133, Aerospace series Quality Management Systems Qualificati
18、on Procedure for Aerospace Standard Products MIL-I-81969/1-02, Installing and removal tools, connector electrical contact, Type III, Class 2, composition C 1) MIL-I-81969/14-11, Installing and removal tools, connector electrical contact, Type III, Class 2, composition B 1) EUROCAE ED-14E / RTCA DO-1
19、60E, Environmental conditions and test procedures for airborne equipment 2) EUROCAE ED-12B or C / RTCA DO-178B or C, Software Consideration in Airborne Systems and Equipment Certification 2) EUROCAE ED-80 / RTCA DO-254, Design Assurance Guidance for Electronic Hardware 2) AS 5692, Aerospace Standard
20、 Arc Fault Circuit Breaker (AFCB) Aircraft, Trip-Free, Single Phase 115 V a.c.-400Hz Constant Frequency 3) 1) Published by: DoD National (US) Mil. Department of Defense http:/www.defenselink.mil/ 2) Published by: EUROCAE Regional (EU) EURopean Organisation for Civil Aviation Equipment http:/www.euro
21、cae.org/ 3) Published by: SAE National (US) Society of Automotive Engineers http:/www.sae.org/ prEN 4838-001:2016 (E) 4 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3841-100 apply. 4 Description These arc fault circuit breakers are operated by a “p
22、ush-pull“ type single pushbutton (actuator). In case of thermal overload or arc fault, electrical contacts must open. In both cases tripping time is related according to the type of default. In any operating state a “trip-free“ tripping is ensured. 5 Design 5.1 Materials 5.1.1 Metallic materials All
23、 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. When bimetals are used, an eventual cor
24、rosion 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 internal electric arc. They shall be insen
25、sitive 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 requested use. Materials shall be selecte
26、d 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 circuit breaker mechanism shall allow f
27、ree 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 operation in these conditions shall not aff
28、ect further performances of the circuit breaker. prEN 4838-001:2016 (E) 5 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). 5.2.5 Control actuator In engaged position, the visible par
29、t 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 from all energized parts. The control actuator shall not stay in a transition position
30、, 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 contacts of the circuit breaker open and indicating contact closes. The circuit breaker rati
31、ng 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 way that the calibration unit cannot be reached without breaking a sealing. 5.2.7 Clearan
32、ces 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 conductive material, as well as between the energized parts of opposite polarity, shall be sufficient to avoid any default
33、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 non-operating release mechanism), shall cause the opening of the circuit by circuit breaker destruction without a
34、ny fire or important smoke release. 5.2.9 Safety and reliability The arc fault protection must never inhibit the thermal overload protection. prEN 4838-001:2016 (E) 6 6 Characteristics 6.1 General characteristics See Table 1. Table 1 General characteristics Designation Requirements Assembly See prod
35、uct standard. Mass See product standard. Operational altitude See product standard. Power contact connection See product standard. 1 input terminal on power supply side (identified by digit 1) 1 output terminal on distribution side (identified by digit 2) Operational ambient temperatures limits for
36、thermal protection From 55 C to 125 C Temperature compensation for thermal protection From 55 C to 125 C See product standard. Rating marking On control actuator (indelible white) Arc fault protection: Operational ambient temperatures limits From 40 C to 85 C a a The MTBF of the electronics (the arc
37、 fault protection) can be reduced by an excursion of the temperature inside the ranges 55 C, 40 C and 85 C, 125 C. Nevertheless no nuisance tripping can occur inside these ranges. 6.2 Ratings See product standard. 6.3 Nominal voltage of operational circuits See product standard. 6.4 Dimensional char
38、acteristics See product standard. 6.5 Recommended panel mounting See product standard. prEN 4838-001:2016 (E) 7 7 Tests 7.1 Mechanical tests See Table 2. Table 2 Mechanical tests Tests Requirements Visual check EN 3841-201 Operational force Closing force (push) EN 3841-502 3,5 N to 45 N Opening forc
39、e (pull) 5 N to 30 N Mechanical strength Actuator Travel EN 3841-501 For value, see product standard. 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
40、3841-505 2 N.m Tensile force as per F1 (see Figure 1 in product standard). 110 N Pressure force as per F2 (see Figure 1 in product standard). 55 N Signal contact connection (size 20) See product standard Insertion force Insertion possible without tools See EN 3841-509 6N Extraction force 15 N Contac
41、t retention force (pre-load 13,5 N) See EN 3841-510 67 N shift 0,3 mm Radial load See EN 3841-510 30 N 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 4838-001:2016 (E) 8 7.2 Environmental tests See Table 3. Table 3 Environmental c
42、onditions (1 of 2) Tests Requirements Combined tests Ambient temperature 70 C and vibrations (see Notes). Sinusoidal (see Figure 1). Duration: circuit breaker in the “closed“ position; - 0,9 n load - Seven cycles/axis - 1 octave/min; - no load - Two cycles/axis - 1 octave/min. circuit breaker in the
43、 “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 g-PK 500 Hz to 2 000 Hz - Constant acceleration 5 g-PK Random (see Figure 2). Duration: circuit breaker in the “closed“ position; - 0,9 n l
44、oad - 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 5,82 Grms Low frequencies (see Figure 3). Applicability: see product standard. Duration: circuit breaker in the “closed“ position; - 0,9 n load - Two cycles/
45、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 g-PK Combined tests Ambient temperature 85 C, cabin max. altitude 4 600 m and vibrations (see Notes). Sinusoidal - Applicability: see product standard. D
46、uration: circuit breaker in the “closed“ position; - 0,9 n load - 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. 5 Hz to 54 Hz - Constant shift 2 a 0,5 mm 54 Hz to 2 000 Hz - Co
47、nstant acceleration = 3 g-PK prEN 4838-001:2016 (E) 9 Table 3 Environmental conditions (2 of 2) Tests Requirements Mechanical shocks (see notes) 50 g-PK - 11 ms - half sine wave See EN 3841-507. Constant accelerations See product standard. Sand and dust See product standard. Corrosion (salt spray) S
48、ee EN 3841-402 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 EN 3841-1, code B Smoke density See test EN 2825,
49、 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 Susceptibility towards electrical perturbations See DO 160E Section 17 Category A See DO 160E Section 18 Category R See DO 160E Section 19 Category CC See DO 160E Section 20 Category C See DO 160E Section 21 Category M See D
