1、 IEC 60811-508 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 508: Mechanical tests Pressure test at high temperature for insulation and sheaths Cbles lectriques et fibres optiques Mthodes dessai pour les
2、 matriaux non-mtalliques Partie 508: Essais mcaniques Essai de pression temprature leve pour les enveloppes isolantes et les gaines IEC60811-508:2012 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publi
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16、s commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60811-508 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 508: Mechanical tests Pressure test at high tempe
17、rature for insulation and sheaths Cbles lectriques et fibres optiques Mthodes dessai pour les matriaux non-mtalliques Partie 508: Essais mcaniques Essai de pression temprature leve pour les enveloppes isolantes et les gaines INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTER
18、NATIONALE R ICS 29.035.01; 29.060.20 PRICE CODE CODE PRIX ISBN 978-2-88912-984-3 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. A
19、ttention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 60811-508 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 4.2.1 Air oven . 6 4.2.2 In
20、dentation device . 7 4.3 Insulation 7 4.3.1 Sample and test piece preparation 7 4.3.2 Procedure 7 4.4 Sheath 9 4.4.1 Sample and test piece preparation for sheaths 9 4.4.2 Procedure 10 5 Test report 11 Annex A (normative) Calculation of the compressing force . 15 Annex B (informative) Recommended per
21、formance requirement 17 Bibliography 18 Figure 1 Indentation device 12 Figure 2 Measurement of indentation . 12 Figure 3 Measurement of indentation for small test pieces . 13 Figure 4 Flat cable with a flat smaller side . 13 Figure 5 Indentation device for flat cables with a flat smaller side 14 Tab
22、le A.1 General value for k . 15 60811-508 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 508: Mechanical tests Pressure test at high temperature for insulation and sheaths FOREWORD 1) The International Electrotech
23、nical 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 and electronic fields. To thi
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30、 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 agents including individual ex
31、perts 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 of, or reliance upon, this IEC
32、 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 some of the elements of this IEC
33、 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 60811-508 has been prepared by IEC technical committee 20: Electric cables. This Part 508 of IEC 60811 cancels and replaces Clause 8 of IEC 60
34、811-3-1:1985, which is withdrawn. Full details of the replacements are shown in Annex A of IEC 60811-100:2012. Significant technical changes with respect to the previous edition are as follows: re-statement of oven characteristics, especially relating to anti-vibration and to temperature control; en
35、hanced detail as to the preparations and testing of flat cables; enhanced detail as to thickness and dimensional measurements. See also the Foreword to IEC 60811-100:2012. 4 60811-508 IEC:2012 The text of this standard is based on the following documents: FDIS Report on voting 20/1304/FDIS 20/1353/R
36、VD 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, Part 2. This part of IEC 60811 shall be used in conjunction with IEC 60811-100. A list o
37、f 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 the contents of this publication will remain unchanged until the stability date indica
38、ted 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. 60811-508 IEC:2012 5 INTRODUCTION The IEC 60811 series specifies the test methods to be used
39、 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 used for insulating, sheathing, bedding, filling or taping within cables. NOTE 2 These
40、 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, in particular optical fibre cables, communication and control cables and cables for
41、ships and offshore applications. 6 60811-508 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 508: Mechanical tests Pressure test at high temperature for insulation and sheaths 1 Scope This Part 508 of IEC 60811 gives the procedure for a pressure test at high t
42、emperature, which typically applies to thermoplastic compounds used for insulating and sheathing materials. NOTE 1 The method is principally intended for thermoplastic materials, but may be used for cross-linked materials when specifically required by the relevant cable standard. NOTE 2 The test met
43、hod is not recommended for thicknesses below 0,7 mm. 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 cited applies. For undated references, the latest ed
44、ition 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 60811-201, Electric and optical fibre cables Test methods for non-metallic materials Part 201: General tests Measur
45、ement of insulation thicknessIEC 60811-202, Electric and optical fibre cables Test methods for non-metallic materials Part 202: General tests Measurement of thickness of non-metallic sheaths3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60811-100 ap
46、ply. 4 Test method 4.1 General This part of IEC 60811 shall be used in conjunction with IEC 60811-100. This standard gives the method for the pressure test at high temperature which applies to insulation and sheathing compounds. All the tests shall be carried out not less than 16 h after the extrusi
47、on of the insulating or sheathing compounds. 4.2 Apparatus 4.2.1 Air oven The test shall be carried out in an oven. The oven shall use natural air circulation. 60811-508 IEC:2012 7 NOTE 1 Forced or continuous air circulation is not required. Ovens fitted with air stirring mechanisms are likely to ca
48、use vibration. The oven shall not incorporate any equipment likely to cause vibration, nor shall it include exposed heating elements. The temperature of the air shall be maintained continuously at the value specified in the relevant cable standard. The oven shall be capable of operating to within 2
49、K of the specified test temperature. NOTE 2 The need for a temperature control to 2 K is crucial. This is especially so if the material under test is a thermoplastic with a sharp melting point (such as some ethylene polymers) as a small temperature rise above that specified can result in a large increase in indentation. In operation, the oven shall be located in a p
