BS EN 3475-411-2014 Aerospace series Cables electrical aircraft use Test methods Resistance to fluids《航空航天系列 航空器用电缆 试验方法 液阻》.pdf

1、BSI Standards PublicationBS EN 3475-411:2014Aerospace series Cables,electrical, aircraft use TestmethodsPart 411: Resistance to fluidsBS EN 3475-411:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3475-411:2014.It supersedes BS EN 3475-411:2005 which is wit

2、hdrawn.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 include all the neces

3、saryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 87286 0ICS 49.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publ

4、ished under the authority of theStandards Policy and Strategy Committee on 30 November 2014.Amendments issued since publicationDate Text affectedBS EN 3475-411:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3475-411 November 2014 ICS 49.060 Supersedes EN 3475-411:2005English Version Aerosp

5、ace series - Cables, electrical, aircraft use - Test methods - Part 411: Resistance to fluids Srie arospatiale - Cbles lectriques usage aronautique - Mthodes dessais - Partie 411: Rsistance aux fluides Luft- und Raumfahrt - Elektrische Leitungen fr Luftfahrtverwendung - Prfverfahren - Teil 411: Best

6、ndigkeit gegen Flssigkeiten This European Standard was approved by CEN on 11 October 2014. 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 l

7、ists 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 (English, French, German). A version in any other language made by translation und

8、er 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, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former

9、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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUR

10、OPEN 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 Members. Ref. No. EN 3475-411:2014 EBS EN 3475-411:2014EN 3475-411:2014 (E) 2 Con

11、tents Page Foreword 3 1 Scope 3 2 Normative references 3 3 Test fluids .4 4 Procedures .4 5 Requirements .7 BS EN 3475-411:2014EN 3475-411:2014 (E) 3 Foreword This document (EN 3475-411:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN)

12、. 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 countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status

13、of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2015, and conflicting national standards shall be withdrawn at the latest by May 2015. This document supersedes EN 3475-411:2005. Attention is drawn to the possibility that some of the elements

14、 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europe

15、an Standard: Austria, Belgium, Bulgaria, 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, Slove

16、nia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 1 Scope This European Standard specifies two methods of determining the fluid resistance of a finished cable. Method 1: occasional contamination. Method 2: contamination test. It shall be used together with EN 3475-100 and EN 3909. 2 No

17、rmative references The 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 amendment

18、s) applies. EN 3475-100, Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100: General EN 3475-201, Aerospace series - Cables, electrical, aircraft use - Test methods - Part 201: Visual examination EN 3475-203, Aerospace series - Cables, electrical, aircraft use - Test metho

19、ds - Part 203: Dimensions EN 3475-302, Aerospace series - Cable, electrical, aircraft use - Test methods - Part 302: Voltage proof test EN 3475-405, Aerospace series - Cables, electrical, aircraft use - Test methods - Part 405: Bending at ambient temperature EN 3475-503, Aerospace series - Cables, e

20、lectrical, aircraft use - Test methods - Part 503: Scrape abrasion EN 3909, Aerospace series - Test fluids and test methods for electric components and sub-assemblies BS EN 3475-411:2014EN 3475-411:2014 (E) 4 ISO 1817, Rubber, vulcanized or thermoplastic Determination of the effect of liquids MIL-PR

21、F-87937D, Performance specification: cleaning compound, aerospace equipment 1)ASTM D740, Standard Specification for Methyl Ethyl Ketone 2)AMS 1476B, Aircraft toilet flush fluid 2)3 Test fluids Unless otherwise specified in the product standard, all fluids listed in EN 3909 are mandatory. 4 Procedure

22、s 4.1 General 4.1.1 Unless specified in the product specification method 2 shall be used. 4.1.2 For each fluid to be tested, take two clean specimens at least off 1m in length from a finished cable. Where large cables are being tested a single specimen may be divided into two after fluid exposure if

23、 the resulting pieces are of sufficient length to allow the post tests to be correctly carried out. Strip approximately 25 mm of both ends of each specimen. Measure the cable diameter EN 3475-203. 4.2 Method 1: occasional contamination test 4.2.1 Mount the test samples in their normal operating conf

24、iguration and maintain at room temperature or as specified in the product standard. 4.2.2 Dip, brush or spray the test sample with the specified fluid which shall be maintained at the test temperature given in Table 1, or as specified in the product standard. Ensure that the entire surface of the sa

25、mple is thoroughly wetted. Allow the sample to drain naturally for 5 min to 10 min; shaking or wiping is not permitted. Transfer the test sample to a test chamber and maintain at the test temperature for the time specified in the product standard. If not specified, the parameters shall be (65 2) C f

26、or +08160 h. 4.2.3 At the end of the period allow the test sample to return to room temperature, and remain at room temperature for between 1 h and 2 h, before being subjected to final examination. 4.2.4 Repeat this procedure, if specified by the product standard. 4.3 Method 2: contamination test fo

27、r aircraft applications (to be conducted unless over wish specified in the product specifications) 4.3.1 For each fluid to be tested, take two clean specimens at least off 1 m in length from a finished cable. Where large cables are being tested a single specimen may be divided into two after fluid e

28、xposure if the resulting pieces are of sufficient length to allow the post tests to be correctly carried out. 1) Published by: DoD National (US) Mil. Department of Defense. http:/www.defenselink.mil/ 2) Published by: ASTM National (US) American Society for Testing and Materials. http:/www.astm.org/

29、BS EN 3475-411:2014EN 3475-411:2014 (E) 5 4.3.2 Unless otherwise stated in the product standard, each specimen shall be wound seven complete turns onto a mandrel of diameter 12 times the maximum specified outer cable diameter without torsion, but with sufficient tension to ensure the specimen remain

30、s fully in contact with the mandrel. Remove the mandrel (if necessary the specimen may be tied using lacing cord so as to retain the coils). 4.3.3 Immerse the test two specimens fully in one of the specified test fluid with the ends 150 mm above the surface of the fluid which shall be maintained at

31、the temperature specified in Table 1 for each of fluids listed in EN 3909 or the cable maximum rated temperature whichever is the lowest for (24 1) h. 4.3.4 Remove the specimens from the fluid and transfer them to a chamber at (65 2) C for +08160 h. 4.3.5 At the end of the period allow the test samp

32、le to cool to room temperature, and remain at room temperature for between 1 h and 2 h, before being subjected to final examination. BS EN 3475-411:2014EN 3475-411:2014 (E) 6 Table 1 Fluid No. Fluid type see EN 3909 Test fluid Flash point Test temperature 1 Fuels Gasoline ISO 1817 Liquid B 4 40 Kero

33、sene ISO 1817 Liquid F 40 70 2 Hydraulic fluid Phosphate ISO 1817 Liquid 103 160 70 Silicone NATOS1714 140 80 Mineral NATOH-520 OM-18 80 80 3 Oils Mineral NATOO1176, OMD-90 200 125 Mineral NATOO142, OM-12 120 70 Synthetic Diester ISO 1817 Liquid 101 260 150 Synthetic Polyol ester NATO160 OX-26 15 15

34、0 4 Cleaning fluids Solvent Isopropanol 12 50 Solvent Propanol 25 % + White spirit 75 % v/v 25 Solvent Methylethylketone ASTM-D740 4 25 Detergent MIL-PRF-87937D Type IV 25 Sullage AMS 1476B 5 % solution in water v/v 25 5 De-icing Runway 50 % Inhibited Potassium Acetate in Water v/v 25 Ground Ethylen

35、e Glycol 80 % + Water 20 % v/v 25 Flight NATO-S-745 AL-5 25 6 Fire Extinguishants See Note 7 Cooling ISO 1817 Liquid 103 177 25 NOTE Because of the nature of these products in their normal condition in service i.e. gaseous, it is impossible to perform Fluid immersion tests in a liquid state under st

36、andard Laboratory conditions. Therefore no testing will be performed; research into alternative fluids and or test methods is being undertaken at the time of writing of this standard. Due to restrictions applicable by local laws, fire extinguishants shall not be discharged in non-critical situations

37、. BS EN 3475-411:2014EN 3475-411:2014 (E) 7 5 Requirements 5.1 The following fluid exposure the specimen shall be. 5.1.1 Visually inspected EN 3475-201. a) There shall be no crazing or de-lamination of the insulation and covering; b) Marking shall remain legible; c) All colours shall remain recogniz

38、able. 5.1.2 The cable diameter shall be measured EN 3475-203 variation of the overall diameter shall not exceed 5 %. 5.2 The coiled part of each sample is then straightened and subjected to one of the following tests. 5.2.1 Specimen (A) shall be subject to the ambient bend test EN 3475-405 followed

39、by the voltage proof test EN 3475-302, as defined in the product standard. 5.2.2 Specimen (B) shall be subject to. a) Voltage proof test EN 3475-302, as defined in the product standard; b) Scrape abrasion test, according to EN 3475-503 as defined in the product standard for ambient temperature. This

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