1、 IEC 60811-408 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 408: Miscellaneous tests Long-term stability test of polyethylene and polypropylene compounds Cbles lectriques et fibres optiques Mthodes dess
2、ai pour les matriaux non-mtalliques Partie 408: Essais divers Essai de stabilit long terme pour les mlanges polythylne et polypropylne IEC60811-408:2012 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this pu
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16、 des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60811-408 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 408: Miscellaneous tests Long-term stability t
17、est of polyethylene and polypropylene compounds Cbles lectriques et fibres optiques Mthodes dessai pour les matriaux non-mtalliques Partie 408: Essais divers Essai de stabilit long terme pour les mlanges polythylne et polypropylne INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE
18、 INTERNATIONALE L ICS 29.035.01; 29.060.20 PRICE CODE CODE PRIX ISBN 978-2-88912-968-3 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 distribu
19、tor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 60811-408 IEC:2012 CONTENTS FOREWORD . 3 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Test method . 6 4.1 Test method for unfilled cables 6 4.1.1 General . 6 4.1.2 Apparatu
20、s 7 4.1.3 Sample and test piece preparation 7 4.1.4 Ageing procedure 7 4.1.5 Evaluation of the result 8 4.2 Test method for fully filled cables 8 4.2.1 General . 8 4.2.2 Apparatus 8 4.2.3 Sample and test piece preparation 8 4.2.4 Ageing procedure 8 4.2.5 Evaluation of the result 8 5 Test report 8 An
21、nex A (normative) Sample conditioning 9 Bibliography 10 60811-408 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 408: Miscellaneous tests Long-term stability test of polyethylene and polypropylene compounds FOREWO
22、RD 1) 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 elect
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30、s or 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,
31、 use 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 th
32、at some 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 60811-408 has been prepared by IEC technical committee 20: Electric cables. This Part 408 of IEC 60811 canc
33、els and replaces Annex A of IEC 60811-4-2:2004, 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 60811-408 IEC:2012 The text of
34、this standard is based on the following documents: FDIS Report on voting 20/1292/FDIS 20/1341/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 Direc
35、tives, Part 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 deci
36、ded that 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 amende
37、d. 60811-408 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 t
38、ypically 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 oth
39、er cables, in particular optical fibre cables, communication and control cables and cables for ships and offshore applications. 6 60811-408 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 408: Miscellaneous tests Long-term stability test of polyethylene and po
40、lypropylene compounds 1 Scope This Part 408 of IEC 60811 gives the procedure to establish as to whether or not the quality of a cables components will be satisfactory over the proposed life of a communication cable. This test is considered only as a material selection test to ensure that the chosen
41、materials are satisfactory for the intended life of the cable. The test duration makes the test unsuitable for routine quality control testing; one method found suitable for monitoring raw materials is given in IEC 60811-410. 2 Normative references The following documents, in whole or in part, are n
42、ormatively 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 amendments) applies. IEC 60811-100:2012, Electric and optical fibre cables Test
43、 methods for non-metallic materials Part 100: General IEC 60811-410, Electric and optical fibre cables Test methods for non-metallic materials Part 410: Miscellaneous tests Test method for copper-catalyzed oxidative degradation of polyolefin insulated conductors ISO 188, Rubber, vulcanized or thermo
44、plastic Accelerated ageing and heat resistance tests 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 Test method for unfilled cables 4.1.1 General This part of IEC 60811 shall be used in conjunction with IEC 60811-1
45、00. NOTE This test method is only applicable to communication cables containing copper pairs. A similar test method applicable to electric cables for power distribution is under consideration. The need to establish whether or not the quality of a cables components will be satisfactory over the propo
46、sed life of the cable is well recognized. In particular, polyolefin insulation shall have sufficient resistance to ageing in service. The definition of test duration, temperature, atmosphere and failure criteria shall be carefully chosen. 60811-408 IEC:2012 7 One of the two test conditions, differin
47、g in test temperatures and duration, shall be used according to the severity of cable system conditions, as specified in the cable standard. Condition A: Applies to insulations in cables or installations under moderate conditions generally below 50 C such as directly buried cables, cables in ducts o
48、r troughs, or cables exposed above ground in temperate climates: 100 C for 42 days. Condition B: Applies to insulation in cables or installations in above-ground situations under hot conditions, for instance cabinets or terminal boxes: 105 C for 42 days. 4.1.2 Apparatus For the purpose of this test,
49、 the different equipment used is as follows: a) An air oven generally in accordance with ISO 188 and complying especially with the following criteria: the mean temperature throughout the test shall be controlled to within 0,5 C of the specified temperature; the maximum variation of temperature throughout the test shall not exceed 1,0 C of the specified temperatures;
