1、 IEC 60811-402 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 402: Miscellaneous tests Water absorption tests Cbles lectriques et fibres optiques Mthodes dessai pour les matriaux non-mtalliques Partie 402
2、: Essais divers Essais dabsorption deau IEC60811-402:2012 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
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16、. IEC 60811-402 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 402: Miscellaneous tests Water absorption tests Cbles lectriques et fibres optiques Mthodes dessai pour les matriaux non-mtalliques Partie 40
17、2: Essais divers Essais dabsorption deau INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE K ICS 29.035.01; 29.060.20 PRICE CODE CODE PRIX ISBN 978-2-88912-962-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Ele
18、ctrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 60811-402 IEC:2012 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Normative refe
19、rences . 6 3 Terms and definitions . 6 4 Test method . 6 4.1 General . 6 4.2 Pre-conditioning 6 4.3 Electrical water absorption test 6 4.3.1 Apparatus 6 4.3.2 Preparation of test pieces 7 4.3.3 Test procedure 7 4.3.4 Evaluation of results 7 4.4 Gravimetric water absorption test 7 4.4.1 Preparation o
20、f test piece 7 4.4.2 Testing procedure 8 4.4.3 Expression of results . 9 5 Test report 9 Bibliography 10 Table 1 d.c. test voltages . 7 60811-402 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 402: Miscellaneous t
21、ests Water absorption tests FOREWORD 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 conce
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24、osely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the rele
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29、 its directors, employees, servants 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 expens
30、es arising out of the publication, 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) Attent
31、ion is drawn to the possibility that 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 60811-402 has been prepared by IEC technical committee 20: Electric cable
32、s. This Part 402 of IEC 60811 cancels and replaces Clause 9 of IEC 60811-1-3:1993, 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
33、. 4 60811-402 IEC:2012 The text of this standard is based on the following documents: FDIS Report on voting 20/1286/FDIS 20/1335/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 i
34、n accordance with the ISO/IEC Directives, 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
35、IEC website. The committee has decided 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, repla
36、ced by a revised edition, or amended. 60811-402 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.
37、NOTE 1 Non-metallic materials are typically 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 be
38、en widely accepted and used for other cables, in particular optical fibre cables, communication and control cables and cables for ships and offshore applications. 6 60811-402 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 402: Miscellaneous tests Water absorp
39、tion tests 1 Scope This Part 402 of IEC 60811 describes water absorption tests which typically apply to cross-linked 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 docume
40、nt 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 methods for non-metallic materials
41、Part 100: General 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 shall be used in conjunction with IEC 60811-100. Unless otherwise specified, tests shall be carried out at room temper
42、ature. 4.2 Pre-conditioning All the tests shall be carried out not less than 16 h after the extrusion or cross-linking, if any, of the insulating or sheathing compounds. If the test is carried out at room temperature, the test pieces shall be kept for at least 3 h at a temperature of (23 5) C. 4.3 E
43、lectrical water absorption test 4.3.1 Apparatus The following apparatus shall be used: a) a.c and d.c voltage sources; b) voltmeter; c) water bath with heating equipment. 60811-402 IEC:2012 7 4.3.2 Preparation of test pieces The cores to be tested shall be removed from a sample of finished cable app
44、roximately 3 m long. Care shall be taken to avoid damage to the insulation during removal of the cores. 4.3.3 Test procedure a) Pre-test The cores shall be immersed in a water bath in which the water has been heated to the temperature specified in the standard for the type of cable. The ends of the
45、cores shall protrude sufficiently above the water level to prevent damage due to leakage current along the surface of the cores when the required voltage is applied between the conductors and the water. After the cores have been immersed in the water for 1 h, an a.c. voltage of 4 kV shall be applied
46、 between the conductors and the water for 5 min. If any sample of core breaks down, it shall be removed from the water bath and not used in the main test specified in item b) below. However, the test shall be repeated not more than twice, by taking another sample of the same core, which shall be sub
47、jected to the same pre-test. The object of the pre-test is to ensure that only undamaged cores are used for the main test. b) Main test Cores which are satisfactory on the pre-test shall remain in the water bath with the water still maintained at the temperature specified in the relevant standard. A
48、 d.c. voltage in accordance with Table 1 below shall be applied between the conductors and the water for the time specified in the standard for the type of cable, the negative pole being connected to the conductor of each test piece. Table 1 DC test voltages Thickness, t, of insulation specified Mea
49、n value mm DC voltage V 0,8 and 0,9 1,0 and 1,2 1,2 t 1,6 1,6 t 2,0 2,0 t 800 1 000 1 400 2 000 2 500 4.3.4 Evaluation of results No breakdown shall occur. 4.4 Gravimetric water absorption test 4.4.1 Preparation of test piece a) For cables with conductors of nominal cross-sectional area equal to or less than 25 mm2and rated voltage up to and including 0,6/1 kV: Each test piece shall be a piece of
