1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58methods Part 203: DimensionsThe European Standard EN 3475-203:2006 has the status of a British Stan
2、dardICS 49.060Aerospace series Cables, electrical, aircraft use Test BRITISH STANDARDBS EN 3475-203:2006Incorporating Corrigendum No. 1BS EN 3475-203:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006ISBN 0 580 491
3、67 6Amendments issued since publicationAmd. No. Date Comments16691 Corrigendum 1September 2006 Correction to the National ForewordThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. National forewordThis British
4、Standard is the official English language version of EN 3475-203:2006.The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Subcommittee ACE/6/-/2, Aerospace - Cables.A list of organizations represented on ACE/
5、6/-/2 can be obtained on request to its secretary.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3475-203April 2006ICS 49.060English VersionAerospace series - Cables, electrical, aircraft use - Testmethods - Part 203: DimensionsSrie arospatiale - Cbles lectriques usagearonautique - Mthodes dessai
6、s - Partie 203 :DimensionsLuft- und Raumfahrt - Elektrische Leitungen frLuftfahrtverwendung - Prfverfahren - Teil 203: MaeThis European Standard was approved by CEN on 27 February 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
7、 this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (
8、English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, C
9、zech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROP
10、EN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3475-203:2006: EEN 3475-203:2006 (E) 2 Contents Page Foreword 3 1 Scope .4 2
11、 Normative references .4 3 Apparatus 4 4 Method .4 5 Requirements 5 EN 3475-203:2006 (E) 3 Foreword This European Standard (EN 3475-203:2006) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance w
12、ith the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an i
13、dentical text or by endorsement, at the latest by October 2006, and conflicting national standards shall be withdrawn at the latest by October 2006. 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 shall not be h
14、eld 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France
15、, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3475-203:2006 (E) 4 1 Scope This standard specifies a method of measuring the dimension
16、s of conductors and cables. It shall be used together with EN 3475-100. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
17、 document (including any amendments) applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General. 3 Apparatus 3.1 Conductor diameter The measurement shall be made with a friction or dial micrometer with flat ends having a diameter of at least 5 mm. Use an i
18、nstrument constructed with a vernier capable of measurement to the nearest 0,01 mm. 3.2 Insulation and/or jacket The measurements shall be carried out either with a profile projector, or measuring microscope or equivalent apparatus. 3.3 External diameter The measurement shall be made with a friction
19、 or dial micrometer with flat ends having a diameter of at least 5 mm for single cables and at least 15 mm for multiconductor cables, or with a profile projector. 4 Method 4.1 Conductor The following shall be verified: the number of strands making up the conductor; the nominal diameter of the strand
20、s; the diameter of the suitably straightened conductor. Measure the outside diameter (OD) of the specimen in at least three locations approximately one meter apart. Each measurement shall consist of two micrometer readings taken at 90 from each other. (OD) = average diameter over the conductor EN 34
21、75-203:2006 (E) 5 4.2 Insulation and/or jacket 4.2.1 Wrapped insulation and/or jacket Verify the following: the number of tapes (if possible); the sealing of the tapes; the tape overlap; the minimum thickness of the outer coating or layer or sealed material (if applicable). 4.2.2 Extruded insulation
22、 and/or jacket The radial thickness shall be measured at the thinnest and thickest points. 4.2.3 Minimum average thickness Four measurements shall be made successively around the circumference of the specimen at 90 intervals. The first measurement shall be made at the thinnest point of the cross-sec
23、tion. 4.3 External diameter 4.3.1 Single insulated wire or cable Measure the outside diameter (OD) of the specimen in at least three locations approximately one metre apart. Each measurement shall consist of two micrometer readings taken at 90 from each other. 4.3.2 Non cylindrical cables Measure th
24、e outside diameter (OD) of the specimen in at least six locations approximately equidistant along the length of the specimen. NOTE The location of each measurement shall be made at the maximal overall dimension. (OD) = average diameter over the insulation or jacket 5 Requirements 5.1 Conductor The n
25、umber of strands, the diameter of the strands and of the conductor shall comply with the values given in the product standard (if applicable). EN 3475-203:2006 (E) 6 5.2 Insulation and/or jacket 5.2.1 Wrapped insulation and/or jacket The characteristics shall conform to requirements given in the tec
26、hnical specification or the product standard (if applicable). 5.2.2 Extruded insulation and/or jackets The characteristics shall conform to requirements given in the technical specification or the product standard (if applicable). The minimum value of the radial thickness shall not be less than 70 %
27、 of the maximum measured value (the minimum to maximum thickness ratio). 5.2.3 Minimum thickness average The average of the four measurements shall be equal to or greater than the minimum value given in the product standard (if applicable). 5.3 External diameter The external diameter (average) shall
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