1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4839-001 Edition P 1 November 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: ENG
2、LISH VERSION Aerospace series Arc Fault Circuit breakers, three-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 Schutzschalter, lichtbogen(berschlags) sensitiv, dreipolig, Temperaturkompensiert, Nenns
3、trme von 3 A bis 25 A 115 V a.c. 400 Hz Konstantfrequenz Teil 001: Technische Lieferbedingungen Srie arospatiale Disjoncteurs tripolaires 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“ Pre
4、standard has been drawn 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 c
5、omments. Subsequent to 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
6、ASD-STAN prEN will be 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 st
7、andard and by withdrawing 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 an
8、y particular use, including 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 writte
9、n comments or any suggestions 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. Or
10、der details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1st November 2016 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2016 ASD-STAN prEN 4839-001:2016 (E) 2 Contents Page Foreword
11、 2 1 Scope 3 2 Normative 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 Delivery conditions . 20 11 Packaging 20 12 Storage . 20 Foreword This standard was reviewed by the Domain Technical Coo
12、rdinator 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 4839-001:2016 (E) 3 1 Scope This standard specifies the three-poles temperatu
13、re compensated arc fault circuit breakers 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 sp
14、ecific 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 acc
15、ordance with RTCA DO-178B or C, DAL C and RTCA DO-254, DAL C, respectively. These 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 document an
16、d 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 2083, Aerospace series Copper or copper alloy conductors for electrical cables Product standard
17、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 EN 2826, Aerospace series Burning behaviour of non metallic materials under
18、the influence of radiating heat and flames Determination of gas components in the smoke EN 3841-100 (all parts), Aerospace 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 th
19、e vertical flame propagation EN 9133, Quality Management Systems Qualification Procedure for Aerospace Standard Products EUROCAE ED-14G / RTCA DO 160G *, Environmental Conditions and Test Procedures for Airborne Equipment 1) EUROCAE ED-12B or C / RTCA DO-178B or C, Software Consideration in Airborne
20、 Systems and Equipment Certification 1) EUROCAE ED-80 / RTCA DO-254, Design assurance guidance for airborne electronic hardware 1) AS 5692, Aerospace Standard Arc Fault Circuit Breaker (AFCB) Aircraft, trip-free, single phase and three phase 115 V a.c.-400 Hz Constant frequency 2) * All parts quoted
21、 in this standard. 1) Published by: EUROCAE Regional (EU) European Organization for Civil Aviation Equipment http:/www.eurocae.org/ 2) Published by: SAE National (US) Society of Automotive Engineers http:/www.sae.org/ prEN 4839-001:2016 (E) 4 3 Terms and definitions For the purposes of this document
22、, the terms and definitions given in EN 3841-100 apply. 4 Description These arc fault circuit breakers are operated by a “push-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 typ
23、e of default. In any operating state a “trip-free“ tripping is ensured. 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
24、used so that the electromotive 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
25、; they shall not emit damaging 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 on flake shall be forbidden. Materials which are not spe
26、cified or which are not specially 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 me
27、chanism, the connection and 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 br
28、eaker is only possible after 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. prEN 4839-001:2016 (E) 5 5.2.4 Electrical connect
29、ion 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 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
30、t of this actuator shall be isolated from all energized 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. When pulling it, powe
31、r contacts of the circuit breaker open. 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 way that the calibration
32、unit cannot be reached without breaking a sealing. 5.2.7 Clearances 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
33、 of opposite polarity, shall be sufficient to avoid any default 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
34、 opening of the circuit by circuit breaker destruction without any fire or important smoke release. 5.2.9 Safety and reliability The arc fault protection must never inhibit the overload protection. prEN 4839-001:2016 (E) 6 6 Characteristics 6.1 General characteristics See Table 1. Table 1 General ch
35、aracteristics Designation Requirements Assembly See product standard. Mass See product standard. Operational altitude See product standard. 3 input terminals on power supply side (identified by digit A1, B1, C1) See product standard 3 output terminals on distribution side (identified by digit A2, B2
36、, C2) Operational ambient temperatures limits for thermal protection From 55 C to 125 C Temperature compensation for thermal protection Rating 1 A to 15 A From 55 C to 125 C See product standard. Rating 20 A and 25 A From 55 C to 90 C Rating marking On control actuator (indelible white) Arc fault pr
37、otection: Operational ambient temperatures limits From 40 C to 85 C a a The MTBF of the electronics (the arc 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 Se
38、e product standard. 6.3 Nominal voltage of operational circuits See product standard. 6.4 Dimensional characteristics See product standard. 6.5 Recommended panel mounting See product standard. prEN 4839-001:2016 (E) 7 7 Tests 7.1 Mechanical tests See Table 2. Table 2 Mechanical characteristics Tests
39、 Requirements Visual check EN 3841-201 Operational force Closing force (push) EN 3841-502 8 N to 80 N Opening force (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
40、 nut Tightening torque EN 3841-504 5 N.m. Rotation torque 3 N.m. Main contact connection Screw tightening torque EN 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 prEN 4839-001:2016 (E) 8 7.2 Environ
41、mental tests See Table 3. Table 3 Environmental conditions (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 c
42、ycles/axis - 1 octave/min. circuit breaker in the “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: ci
43、rcuit breaker in the “closed“ position; - 0,9 n load - 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
44、the “closed“ position; - 0,9 n load - Two cycles/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 10 Hz to 5 Hz - Constant acceleration 3,5 g-PK Combined tests Ambient temperature 85 C, cabin max.
45、altitude 4 600 m and vibrations (see notes). Sinusoidal - Applicability: see product standard. Duration: 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 -
46、 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 - Constant acceleration 3 g-PK prEN 4839-001:2016 (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 acc
47、elerations See product standard Sand and dust See product standard Corrosion (salt spray) See 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
48、 EN 3841-406 Inflammability See test EN 3841-100, code B Smoke density See tests EN 2825, code A or code B Toxicity See tests 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 160 Sec
49、tion 17 Category A See DO 160 Section 18 Category R See DO 160 Section 19 Category CC See DO 160 Section 20 Category C See DO 160 Section 21 Category M See DO 160 Section 22 Category XXH33 See DO 160 Section 25 Category A NOTE 1 Vibration tests performed on circuit breakers in closed position without load and in opened position, are carried out in order to detect conta
