1、 IEC 60811-412 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 412: Miscellaneous tests Thermal ageing methods Ageing in an air bomb Cbles lectriques et fibres optiques Mthodes dessai pour les matriaux non
2、-mtalliques Partie 412: Essais divers Mthodes de vieillissement thermique Vieillissement dans une bombe air IEC60811-412:2012 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
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16、 publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60811-412 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 412: Miscellaneous tests Thermal ageing methods Ageing in an air bomb Cbl
17、es lectriques et fibres optiques Mthodes dessai pour les matriaux non-mtalliques Partie 412: Essais divers Mthodes de vieillissement thermique Vieillissement dans une bombe air INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE J ICS 29.035.01; 29.060.20 PRICE CODE
18、CODE PRIX ISBN 978-2-88912-974-4 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez ob
19、tenu cette publication via un distributeur agr. 2 60811-412 IEC:2012 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Test method . 6 4.1 General . 6 4.2 Apparatus 6 4.3 Sample and test pieces preparation. 6 4.4 Ageing procedure 7 4.5 Measur
20、ements . 7 4.6 Expression of the result . 7 5 Test report 8 Bibliography 9 60811-412 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 412: Miscellaneous tests Thermal ageing methods Ageing in an air bomb FOREWORD 1)
21、 The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical
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28、, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or
29、agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use
30、of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that so
31、me of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60811-412 has been prepared by IEC technical committee 20: Electric cables. This Part 412 of IEC 60811 cancels a
32、nd replaces 8.2 of IEC 60811-1-2:1985, which is withdrawn. Full details of the replacements are shown in Annex A of IEC 60811-100:2012. There are no specific technical changes with respect to the previous edition, but see the Foreword to IEC 60811-100:2012. 4 60811-412 IEC:2012 The text of this stan
33、dard is based on the following documents: FDIS Report on voting 20/1296/FDIS 20/1345/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Pa
34、rt 2. This part of IEC 60811 shall be used in conjunction with IEC 60811-100. A list of all the parts in the IEC 60811 series, published under the general title Electric and optical fibre cables Test methods for non-metallic materials, can be found on the IEC website. The committee has decided that
35、the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60811-
36、412 IEC:2012 5 INTRODUCTION The IEC 60811 series specifies the test methods to be used for testing 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
37、used for insulating, sheathing, bedding, filling or taping within cables. NOTE 2 These test methods 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
38、, in particular optical fibre cables, communication and control cables and cables for ships and offshore applications. 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 Thi
39、s Part 412 of IEC 60811 gives the procedure for ageing in an air bomb, which typically 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
40、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. IEC 60811-100:2012, Electric and optical fibre cables Test methods for non-metallic materials Part 10
41、0: General IEC 60811-501, Electric and optical fibre cables Test methods for non-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 gi
42、ven in IEC 60811-100 apply. 4 Test method 4.1 General This part of IEC 60811 shall 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 f
43、ree from oil and moisture, to a pressure of (0,55 0,02) MPa. 4.3 Sample and test 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 te
44、nsile tests without ageing are taken, in accordance with IEC 60811-501. Test pieces, dumb-bell or tubular, shall be prepared according to IEC 60811-501. 60811-412 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 in
45、sulating or sheathing compounds. Compounds of obviously different 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 t
46、ime specified for the material in the relevant standard for 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 ag
47、eing period is completed, the pressure shall be released gradually 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 a
48、t least 16 h. 4.5 Measurements Determination of the mechanical 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, acc
49、ording to the definitions given in IEC 60811-501. If required 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 the tensile strength in
