1、BSI Standards PublicationBS EN 6059-502:2014Aerospace series Electricalcables, installation Protection sleeves TestmethodsPart 502: Resistance to electrical arcsBS EN 6059-502:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 6059-502:2014.It supersedes BS EN
2、 6059-502:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purpo
3、rt to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 86332 5ICS 49.060Compliance with a British Standard cannot confer immunity fromlegal obligations.Thi
4、s British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2014.Amendments issued since publicationDate Text affectedBS EN 6059-502:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 6059-502 December 2014 ICS 49.060 Supersedes EN 6059-502
5、:2009English Version Aerospace series - Electrical cables, installation - Protection sleeves - Test methods - Part 502: Resistance to electrical arcsSrie arospatiale - Cbles lectriques, installation - Gaines de protection - Mthodes dessais - Partie 502: Rsistance aux arcs lectriques Luft- und Raumfa
6、hrt - Elektrische Leitungen, Installation - Schutzschluche - Prfverfahren - Teil 502: Lichtbogenfestigkeit This European Standard was approved by CEN on 28 June 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Sta
7、ndard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (Engli
8、sh, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, B
9、ulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
10、 Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membe
11、rs. Ref. No. EN 6059-502:2014 EBS EN 6059-502:2014EN 6059-502:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Specimen requirements 4 4 Definition and preparation of specimen 5 4.1 Protected bundle (bundle P) .5 4.2 Aggressive bundle (bundle A) 5 4.3 Test configuration7 5 Ap
12、paratus .8 5.1 Electrical equipment 8 5.2 Test equipment . 10 5.3 Test protocol . 10 5.4 Test rig set-up . 10 6 Method . 11 6.1 Test Procedure 11 6.2 Examination . 12 6.3 Test report . 12 7 Requirements 12 BS EN 6059-502:2014EN 6059-502:2014 (E) 3 Foreword This document (EN 6059-502:2014) has been p
13、repared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member cou
14、ntries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2015, and conflicting national standards shall be withdrawn at the latest by June 2015. Attent
15、ion 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 not be held responsible for identifying any or all such patent rights. This document supersedes EN 6059-502:2009. According to the CEN-CENELEC Internal Regulations
16、, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
17、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 6059-502:2014EN 6059-502:2014 (E) 4 1 Scope This European Standard specifies a method of assessing the behaviour of protection sle
18、eves or conduits subject to an external electric arc, either at 115 Vac or 230 Vac 400 Hz. This Standard shall be used together with EN 6059-100. The primary aim of this test is to produce, in a controlled fashion, electric arcs at the immediate vicinity of a protection sleeve or conduit and to exam
19、ine possible consequences on cables inside this protection, which are supposed to be maintained in a safe condition. These electric arcs are representative of those, which may occur in service when a typical cable bundle is severely damaged. In order to optimize thickness and mass of such protection
20、, it is necessary to associate a current limit In to each sleeves or conduits construction. Two levels of prospective fault current are specified for all protection sizes. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispe
21、nsable 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 2267-010, Aerospace series Cables, electrical, for general purpose Operating temperatures between 55 C and 26
22、0 C Part 010: DR family, single UV laser printable Product standard EN 2350, Aerospace series Circuit breakers Technical specification EN 3475-302, Aerospace series Cables, electrical, aircraft use Test methods Part 302: Voltage proof test EN 6059-100, Aerospace series Electrical cables, installatio
23、n Protection sleeves Test methods Part 100: General EN 6059-501, Aerospace series Electrical cables, installation Protection sleeves Test methods Part 501: Voltage proof test A-A-52083, Specification for tape lacing and tying 1) 3 Specimen requirements Protection sleeves or conduits to be tested sha
24、ll be of traceable origin and, unless otherwise specified, shall have passed the voltage proof test (EN 6059-501) as defined in the concerned product standard. Unless otherwise specified in the concerned technical product standard, at least one size of protection sleeve per sleeve thickness or const
25、ruction type (if different from one size to another) shall be assessed. If possible for each thickness or construction type the test must be performed on a sample having the minimum authorized thickness or minimum authorized mass. 1) Published by: Customer Service, Defense Printing Service Detachmen
26、t Office, 700 Robbins Ave, Building 4D, Philadelphia PA 19111-5094 USA. BS EN 6059-502:2014EN 6059-502:2014 (E) 5 4 Definition and preparation of specimen 4.1 Protected bundle (bundle P) Bundles P are made of arc tracking resistant cables, typically from EN 2267-010 product standard unless otherwise
27、 specified in the concerned protection sleeves product standard, with bundle external protection to be tested. The cable bundle outer diameter shall be as closed as possible to the internal diameter of the protection to be tested. This diameter is obtained: with a full assembly of size 24 cables, or
28、 with a central part in various cable types covered with a full and uniform layer of size 24 cables. The sleeve shall be fitted in accordance with the manufacturers declared fitting instructions. 4.2 Aggressive bundle (bundle A) 4.2.1 Definition and constitution Bundles A are made of 7 arc-tracking
29、resistant cables, typically from EN 2267-010 product standard unless otherwise specified in the concerned protection sleeves product standard, without bundle external protection. The short circuit will be created on these bundles (see 4.3). The cables gauge is chosen in Table 1, in accordance with t
30、he In limit specified for the protection sleeves. Table 1 Choice of cable gauge CB ratings (A) 3 5 7,5 10 10 15 20 25 50 Gauge 26 24 22 20 18 16 14 12 10 Circuit breaker used to protect these cables must be also in accordance with Table 1. EXAMPLE If the sleeve must provide a 15 A protection, take g
31、auge 16 cables to built the bundle with 15 A CB ratings. For information the diameter of the bundle will be three times the cable diameter. 4.2.2 Preparation Cut seven separate lengths of approximately 0,5 m consecutively from one length of cable, and strip one of the ends of insulation to permit el
32、ectrical connection. Clean each length of cable with a clean cloth moistened with propan-2-ol (isopropyl alcohol) fluid. 4.2.3 Lay up the seven cables as follows: a) Form the cables in a six around one configuration as shown in Figure 1. b) Ensure that all cables are straight and geometrically paral
33、lel, and restrained by ties such that they are in continuous contact at least within the test zone. BS EN 6059-502:2014EN 6059-502:2014 (E) 6 c) Position the ties at 50 mm spacing toward the end of the specimen as shown in Figure 2. NOTE The tie material shall be PTFE glass lacing tape conforming to
34、 A-A-52083, finish D size 3. A1-A2 : phase A B1-B2 : phase B C1-C2 : phase C N : Neutral cable connected to earth Key 1 Drop needle Figure 1 Bundle A Electrical configuration Key 1 Glass lacing ties 2 Drop needle 3 Drops 4 10 mm to 20 mm 5 Ends of the 7 cables in the same plane Figure 2 Configuratio
35、n of bundle A BS EN 6059-502:2014EN 6059-502:2014 (E) 7 4.3 Test configuration The bundle A shall be attached on bundle P by qualified tyraps, according to the following Figures 3 and 4. For protective materials with a join or overlap the bundle A shall be so positioned that the energy from any arc
36、is applied to the minimum material thickness part of the protective material Key 1 Ends of the 7 cables in the same plane 2 10 mm to 20 mm 3 Cable ties 4 Tyraps 5 Two attachment points 6 Length and end of bundle sample to be define with mechanical test setup 7 Drops 8 Bundle P 9 Bundle A Figure 3 Te
37、st bundles configuration BS EN 6059-502:2014EN 6059-502:2014 (E) 8 Key 1 Bundle P 2 Drip needle 3 Bundle A Figure 4 Test configuration 5 Apparatus 5.1 Electrical equipment 5.1.1 For 115 Vac 400 Hz network Connect the seven cables of the test sample within a circuit as shown in Figure 5. This circuit
38、 shall have the following requirements: a) The provision of adjustable levels of prospective fault currents for the six A, B and C cables. b) A three phase 200/115 V 400 Hz star (Y) connected supply shall be derived from a dedicated rotary machine capable of sustaining the maximum prospective fault
39、current given in Table 1 for at least sufficient time for circuit protection to operate. In any case the generator shall have a 1 min rating of not less than 20 kVA. c) Circuit breakers shall be rated as given in Table 2 and shall be single pole units. They shall have trip characteristics in accorda
40、nce with EN 2350 or as required in the product specification. NOTE In particular case, others ratings of thermal breaker protection could be employed in accordance with aircraft manufacturer rules. d) The electrical power source shall be appropriately protected and it shall be established that no co
41、mbination of test circuit events would activate this protection. BS EN 6059-502:2014EN 6059-502:2014 (E) 9 e) The ballast Rb resistors shall be non-inductive and of appropriate power rating. Care shall be taken to position all laboratory wiring such that inductive effects are reduced to a practical
42、minimum. Supply cables shall be as short as possible. The ballast resistor Rb is in order to prevent over voltage (115 - 115 W per phase) during the arc extinction phases (opening of an inductive circuit). f) A rheostat, Rf, limiting maximum short-circuit current per phase by simulating a line lengt
43、h. g) Appropriate instrumentation, recording and switching control shall be installed in accordance with good laboratory practice. Key 1 Supply protection 2 Test bundle Figure 5 Test schematic circuit 5.1.2 For 230 Vac 400 Hz network a) Apply 5.1.1 with the following modifications: in b) replace “20
44、0/115 V 400 Hz” by “400/230 V 400 Hz”, in e) replace “115 - 115 W per phase” by “230 - 230 W per phase”. BS EN 6059-502:2014EN 6059-502:2014 (E) 10 b) Except if CBs are defined for 230 Vac uses, before starting tests, there must be CB preliminary verifications: verify each CB voltage drop under his
45、nominal intensity. make a short-circuit directly on the terminals of each CB with a shunt without resistance. verify again the voltage drop. repeat this cycle five times. there must be no significant variations in the voltage drop values. if variations or bad tendency occur, CB must be changed after
46、 each tripping. 5.2 Test equipment Construct an apparatus as shown diagrammatically in Figures 2, 3 and 4 which includes the following minimum provisions: a) Electrical terminations to provide a ready means of connecting test specimens into the circuit as shown in Figure 5. b) A transparent enclosur
47、e to protect personnel from ejected molten metal and short wavelength ultra violet light. c) An electrolyte delivery system which provides a constant rate of (100 10) mg/min and dispenses drops from an 18 gauge needle, cut of square at the outlet. NOTE The needle wall thickness shall be selected suc
48、h that the specified flow rate shall be delivered at approximately six drops per minute. 5.3 Test protocol 5.3.1 The procedure embraces at least one size of protection sleeve per sleeve thickness or construction type and for each two values of prospective fault current, to be set by adjustment of re
49、sistances Rf have been defined in Table 2. Performance of the protection at a given maximum fault current shall be determined by testing three specimens. Thus six specimens are required for each protection size. 5.3.2 Additional testing of other sizes may be deemed necessary in particular cases and values of prospective fault currents, the ratings of thermal breaker protection which are typical of aircraft use have been included in Table 1. 5.3.3 It is emphasized that electrical arcing te
