BS EN 6059-504-2014 Aerospace series Electrical cables installation Protection sleeves Test methods Temperature rise within a loom due to self-heating when protected by a sleeve《航空.pdf

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1、BSI Standards PublicationBS EN 6059-504:2014Aerospace series Electricalcables, installation Protection sleeves TestmethodsPart 504: Temperature rise within a loomdue to self-heating when protected by asleeveBS EN 6059-504:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implemen

2、tation of EN 6059-504:2014.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 purport to i

3、nclude 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 84525 3ICS 49.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This Briti

4、sh Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS EN 6059-504:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 6059-504 July 2014 ICS 49.060 English Version Aerospace series - El

5、ectrical cables, installation - Protection sleeves - Test methods - Part 504: Temperature rise within a loom due to self-heating when protected by a sleeve Srie arospatiale - Cbles lectriques, installation - Gaines de protection - Mthodes dessais - Partie 504 : Augmentation de temperature due lauto-

6、chauffement dun faisceau de cbles avec gaine de protection Luft- und Raumfahrt - Elektrische Leitungen, Installation - Schutzschluche - Prfverfahren - Teil 504: Temperaturanstieg durch Selbsterwrmung eines Leitungsbndels in einem Schutzschlauch This European Standard was approved by CEN on 27 Decemb

7、er 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta

8、ined on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, 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 CE

9、N-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland

10、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre

11、: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 6059-504:2014 EBS EN 6059-504:2014EN 6059-504:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Equipment 4 4 Preparati

12、on of test specimens .4 5 Test methods 5 6 Acceptance criteria 7 BS EN 6059-504:2014EN 6059-504:2014 (E) 3 Foreword This document (EN 6059-504:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in

13、accordance 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 publicati

14、on of an identical text or by endorsement, at the latest by January 2015, and conflicting national standards shall be withdrawn at the latest by January 2015. 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 shal

15、l 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, Bulgaria, Croatia, Cyprus, Czech Republic, Denm

16、ark, 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, Turkey and the United Kingdom. BS EN 6059-504

17、:2014EN 6059-504:2014 (E) 4 1 Scope This European Standard specifies methods of assessing the behaviour and temperature increase of cable loom when fitted with protection sleeves or conduits subject to normal and fault currents. It shall be used together with EN 6059-100. 2 Normative references The

18、following documents, in whole or in part, are normatively referenced in this 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 6059-100

19、, Aerospace series Electrical cables, installation Protection sleeves Test methods Part 100: General 3 Equipment The following equipment shall be required for these tests: a) The test shall be carried out at ambient temperature in a chamber where the whole unit shall be sheltered from draughts. An e

20、xtraction shall be provided but only operated after completion of the test. b) To identify the appearance of smoke, a screen with black and white horizontal bands or any other device shall be used. 4 Preparation of test specimens The test shall be carried out at ambient temperature Ta(typically 20 C

21、) in a chamber where the whole unit shall be sheltered from draughts. An extraction shall be provided but only operated after completion of the test. To identify the appearance of smoke, a screen with black and white horizontal bands or any other device shall be used. Means of electrical power conne

22、ction at both extremities shall not provide any risks of temperature increase. A 3 m long cable loom 1)shall be laid up using air frame cables, whos maximum temperature rating is at least that of the sleeve material being tested, so that it forms a concentric bundle. The looms conductors shall be wi

23、red in series so as to ensure that at the same current passes through each conductor. The resulting loom shall be of such a diameter that it fully fills the protective sleeve being tested. A means shall be provided so that the voltage drop across the centre conductor can be monitor over a length of

24、at least 1,5 m (the test zone). 1) The temperature rating of the cables insulation shall be at least as high as that of the sleeve being tested. BS EN 6059-504:2014EN 6059-504:2014 (E) 5 5 Test methods 5.1 Method 1 5.1.1 Principle Assessment of the increase in temperature caused by fitting a protect

25、ive sleeve over a cable loom (heat transfer ratio). 5.1.2 Procedure Suspend the cable loom (without the protective sleeve being fitted) so that at least the central 2 m section, including the test zone is horizontal and unsupported. Suspend a weight from the ends of the cable in order to reduce sagg

26、ing throughout the test Figure 1. Apply a small electric current 2)Isothe conductor and measure the voltage drop over test zone V20. Calculate the loom resistance R20.Now increase the current so as tisignificantly warm the loom by approximately 40C. Record the new current ITand voltage drop values V

27、t. Using these values calculate the resistance of the wire conductor RT. The temperature T (in C) of the wire conductor is determined from the change in resistance, using the following formula: += 112020tRRTwhere Rtis the resistance (in ) of the conductor at temperature T; R20is the resistance (in _

28、) of the conductor at 20 C; T is the temperature of the conductor (in C); see Table 1. Table 1 Base metal Copper alloy Copper Aluminium 0,003 5 0,004 0,004 Adjust the current so that the conductor temperature stabilizes at a temperature 40 C above ambient. Maintain this temperature TAfor 30 min. and

29、 record the current that is being applied IA to maintain it. 2) This current should not be so low that it does not increase the loom temperature. BS EN 6059-504:2014EN 6059-504:2014 (E) 6 The loom is now to be fitted with a length of over sleeve sufficiently long so as to completely cover the loom b

30、eyond the two voltage pick off points. The current IAis to be reapplied and after 30 min the loom temperature TBcalculated. The protective sleeves heat transfer ratio shall now be calculated using the following formula: Heat transfer ratio 100bA=TT5.2 Method 2 5.2.1 Principle Assessment of internal

31、overheating of a protective sleeve by the loom within. 5.2.2 Procedure Suspend the cable loom (without the protective sleeve being fitted, so that at least the central 2 m section, including the test zone is horizontal and unsupported. Suspend a weight from one end of the cable in order to reduce sa

32、gging throughout the test. Apply a small electric current 2)Isothe conductor and measure the voltage drop over test zone V20. Calculate the loom resistance R20.Now fit the protective sleeve with a length of over sleeve sufficiently long so as to completely cover the loom beyond the two voltage pick

33、off points. Raise the current within the loom so as to raise the temperature of the cable loom to value of the maximum rated temperature of the protective sleeve material T1. Record the new current ITand voltage drop values Vt. Using these values calculate the resistance of the wire conductor RT. Th

34、e temperature T (in C) of the wire conductor is determined from the change in resistance, using the following formula: += 112020tRRTwhere Rtis the resistance (in ) of the conductor at temperature T; R20is the resistance (in _) of the conductor at 20 C; T is the temperature of the conductor (in C); s

35、ee Table 1. Now raise the loom temperature to a value T2which is 30 C above the maximum rated temperature of the protective sleeve material. This temperature is to be maintained for 15 min. BS EN 6059-504:2014EN 6059-504:2014 (E) 7 6 Acceptance criteria 6.1 Method 1 The heat transfer ratio shall not

36、 exceed the value specified in the product standard. 6.2 Method 2 At temperature T1there shall be no indication of visible smoke, or smell or appreciable colour change to the protective sleeve. At temperature T2there shall be no indication of spontaneous combustion. After cooling from temperature T2

37、to ambient there shall be no indication of separation and/or embrittlement of the protective sleeve. Key 1 Test zone Figure 1 Test fixture This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-relate

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