1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationElectric and optical fibre cables Test methods for non-metallic materialsPart 412: Miscellaneous tests Thermal ageing methods Ageing in an air bombBS EN 60811-412:2012National fo
2、rewordThis British Standard is the UK implementation of EN 60811-412:2012. It isidentical to IEC 60811-412:2012. In the UK, the relationship between the supersessions of BS EN 60811 seriescan be summarized as follows.Superseded standards are withdrawnThe UK participation in its preparation was entru
3、sted by Technical CommitteeGEL/20, Electric cables, to Subcommittee GEL/20/17, Electric Cables - Lowvoltage.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users a
4、re responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 65322 3ICS 29.035.01; 29.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authori
5、ty of the StandardsPolicy and Strategy Committee on 31 July 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60811-412:2012BS EN 60811-100 together with Supersedes - -201, -202, -203, -501 BS EN 60811-1-1:1995 -301, -302, -411, -601, -602, -603, -604 BS EN 608
6、11-5-1:2000 -401, -412 BS EN 60811-1-2:1995 -402, -502, -503, -606 BS EN 60811-1-3:1995 -403, -404, -507 BS EN 60811-2-1:1998 -405, -409 BS EN 60811-3-2:1995 -406, -511, -605, -607 BS EN 60811-4-1:2004 -407, -408, -410, -510, -512, -513 BS EN 60811-4-2:2004 -504, -505, -506 BS EN 60811-1-4:1995 -508
7、, -509 BS EN 60811-3-1:1995EUROPEAN STANDARD EN 60811-412 NORME EUROPENNE EUROPISCHE NORM June 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B
8、- 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60811-412:2012 E ICS 29.035.01; 29.060.20 Supersedes EN 60811-1-2:1995 (partially) + A2:2000 (partially)English version Electric and optical fibre cables - Test
9、methods for non-metallic materials - Part 412: Miscellaneous tests - Thermal ageing methods - Ageing in an air bomb (IEC 60811-412:2012) Cbles lectriques et fibres optiques - Mthodes dessai pour les matriaux non-mtalliques - Partie 412: Essais divers - Mthodes de vieillissement thermique - Vieilliss
10、ement dans une bombe air(CEI 60811-412:2012) Kabel, isolierte Leitungen und Glasfaserkabel - Prfverfahren fr nichtmetallene Werkstoffe - Teil 412: Sonstige Prfungen - Thermische Alterungsverfahren - Alterung in einer Druckkammer(IEC 60811-412:2012) This European Standard was approved by CENELEC on 2
11、012-04-16. CENELEC 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 b
12、e obtained on application to the CEN-CENELEC Management Centre or to any CENELEC 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 CENELEC member into its own language and noti
13、fied to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Ital
14、y, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 60811-412:2012 - 2 - Foreword The text of document 20/1296/FDIS, future edition 1 of IEC 60811-412, prepared by IEC/TC 20 “El
15、ectric cables“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60811-412:2012. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-01-16 lat
16、est date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-04-16 This document supersedes 8.2 of EN 60811-1-2:1995 + A2:2000 (partially). Full details of the replacements are shown in Annex A of EN 60811-100:2012. There are no technical changes with respec
17、t to EN 60811-1-2:1995 + A2:2000, but see the Foreword to EN 60811-100:2012. This standard is to be read in conjunction with EN 60811-100. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held respon
18、sible for identifying any or all such patent rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC) Endorsement notice The text of the International Standard IEC 60811-412:2012 was approv
19、ed by CENELEC as a European Standard without any modification. BS EN 60811-412:2012- 3 - EN 60811-412:2012 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced i
20、n 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. NOTE When an international publication has been modified by common modifications,
21、 indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60811-100 2012 Electric and optical fibre cables - Test methods for non-metallic materials - Part 100: General EN 60811-100 2012 IEC 60811-501 - Electric and optical fibre cables - Test methods for non-metallic ma
22、terials - Part 501: Mechanical tests - Tests for determining the mechanical properties of insulating and sheathing compounds EN 60811-501 - BS EN 60811-412:2012 2 60811-412 IEC:2012 CONTENTS INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Test method . 6 4.1 Gen
23、eral . 6 4.2 Apparatus 6 4.3 Sample and test pieces preparation. 6 4.4 Ageing procedure 7 4.5 Measurements . 7 4.6 Expression of the result . 7 5 Test report 8 Bibliography 9 BS EN 60811-412:201260811-412 IEC:2012 5 INTRODUCTION The IEC 60811 series specifies the test methods to be used for testing
24、non-metallic materials of all types of cables. These test methods are intended to be referenced in standards for cable construction and for cable materials. NOTE 1 Non-metallic materials are typically used for insulating, sheathing, bedding, filling or taping within cables. NOTE 2 These test methods
25、 are accepted as basic and fundamental and have been developed and used over many years principally for the materials in all energy cables. They have also been widely accepted and used for other cables, in particular optical fibre cables, communication and control cables and cables for ships and off
26、shore applications. BS EN 60811-412:2012 6 60811-412 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 412: Miscellaneous tests Thermal ageing methods Ageing in an air bomb 1 Scope This Part 412 of IEC 60811 gives the procedure for ageing in an air bomb, which t
27、ypically applies to crosslinked and thermoplastic compounds used for insulating and sheathing materials. 2 Normative 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
28、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60811-100:2012, Electric and optical fibre cables Test methods for non-metallic materials Part 100: General IEC 60811-501, Electric and optical fibre cables Test methods for n
29、on-metallic materials Part 501: Mechanical tests Tests for determining the mechanical properties of insulating and sheathing compounds 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60811-100 apply. 4 Test method 4.1 General This part of IEC 60811 s
30、hall be used in conjunction with IEC 60811-100. Unless otherwise specified, tests shall be carried out at room temperature. 4.2 Apparatus The ageing is realized in an air bomb which can be filled with air, which shall be free from oil and moisture, to a pressure of (0,55 0,02) MPa. 4.3 Sample and te
31、st pieces preparation A sample of cable or sheath, removed from the cable, or samples of core, cut into pieces of sufficient length, shall be taken, preferably from positions close to that from which the samples for the tensile tests without ageing are taken, in accordance with IEC 60811-501. Test p
32、ieces, dumb-bell or tubular, shall be prepared according to IEC 60811-501. BS EN 60811-412:201260811-412 IEC:2012 7 4.4 Ageing procedure This test shall be carried out not less than 16 h after the extrusion or cross-linking, if any, of the insulating or sheathing compounds. Compounds of obviously di
33、fferent compositions shall not be tested at the same time in the same air bomb. Five test pieces shall be placed in the air bomb at ambient temperature without touching each other and shall be kept in the bomb at the temperature and for the time specified for the material in the relevant standard fo
34、r the type of cable. The test pieces shall not occupy more than one-tenth of the effective capacity of the bomb. The bomb shall be filled with air, which shall be free from oil and moisture, to a pressure of (0,55 0,02) MPa. As soon as the ageing period is completed, the pressure shall be released g
35、radually so as to reach atmospheric pressure in not less than 5 min, in order to avoid formation porosity in the test pieces. The test pieces shall then be removed from the bomb and left at ambient temperature, avoiding direct sunlight, for at least 16 h. 4.5 Measurements Determination of the mechan
36、ical properties on aged dumb-bell and/or tubular test pieces obtained directly after ageing shall then be carried out in accordance of IEC 60811-501. 4.6 Expression of the result Calculate the tensile strength and the elongation at break, according to the definitions given in IEC 60811-501. If requi
37、red by the standard for the material in the relevant standard for the type of cable, the values found for the aged test pieces shall be calculated, as variation compared to the untreated test pieces according to the following formulae: 100UUET=TTTV (1) 100UUEE=EEEV (2) where VTis the variation of th
38、e tensile strength in per cent; TEis the tensile strength of aged test piece; TUis the tensile strength of untreated test piece; VEis the variation of the elongation at break in per cent; EEis the elongation at break of aged test piece in per cent; EUis the elongation at break of untreated test piec
39、e in per cent. The untreated test piece shall be kept at ambient temperature. BS EN 60811-412:2012 8 60811-412 IEC:2012 The value and the variation between the median value obtained for the aged test pieces and the median value of the values obtained for the untreated test pieces (see IEC 60811-501)
40、, expressed as a percentage of the latter shall not exceed the percentage specified in the standard for the material in the relevant standard for the type of cable. 5 Test report The test report shall be in accordance with that given in IEC 60811-100. BS EN 60811-412:201260811-412 IEC:2012 9 Bibliog
41、raphy IEC 60811-1-2:1985, Common test methods for insulating and sheathing materials of electric cables Part 1: Methods for general application Section Two Thermal ageing methods (withdrawn) _ BS EN 60811-412:2012This page deliberately left blankThis page deliberately left blankBSI is the independen
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