1、 IEC 62068 Edition 1.0 2013-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electrical insulating materials and systems General method of evaluation of electrical endurance under repetitive voltage impulses Matriaux et systmes disolation lectriques Mthode gnrale dvaluation de lendurance lectrique sou
2、mise des impulsions de tension appliques priodiquement IEC62068:2013 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 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 m
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16、 csciec.ch. IEC 62068 Edition 1.0 2013-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electrical insulating materials and systems General method of evaluation of electrical endurance under repetitive voltage impulses Matriaux et systmes disolation lectriques Mthode gnrale dvaluation de lendurance l
17、ectrique soumise des impulsions de tension appliques priodiquement INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE N ICS 29.080.30 PRICE CODE CODE PRIX ISBN 978-2-83220-676-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la
18、 Commission Electrotechnique 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 62068 IEC:2013 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references
19、 . 5 3 Terms and definitions . 5 4 General test procedures . 8 4.1 Overview . 8 4.2 Test object 9 4.3 Screening test method . 9 4.3.1 General . 9 4.3.2 Test procedure 9 4.3.3 RPDIV and RPDEV measurements 9 4.3.4 Data processing 9 4.3.5 Evaluation . 10 4.4 Endurance test method 10 4.4.1 Reference EIS
20、 . 10 4.4.2 Comparison test 10 5 Test impulse-voltage characteristics . 11 Annex A (informative) Impulse ageing 12 Bibliography 15 Table 1 Test impulse-voltage characteristics 11 62068 IEC:2013 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL INSULATING MATERIALS AND SYSTEMS GENERAL METHOD O
21、F EVALUATION OF ELECTRICAL ENDURANCE UNDER REPETITIVE VOLTAGE IMPULSES 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 intern
22、ational co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter
23、 referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participa
24、te in this preparation. IEC collaborates closely 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 int
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28、rmity. Independent certification bodies provide conformity assessment services and, 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 publicat
29、ion. 7) No liability shall attach to IEC or 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
30、for costs (including legal fees) and expenses 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
31、 application of this publication. 9) Attention 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 62068 has been prepared by IEC
32、 technical committee 112: Evaluation and qualification of electrical insulating materials and systems. This first edition of IEC 62068 replaces IEC 62068-1:2003. It has been re-numbered as IEC 62068, as decided at the Plenary Meeting of TC 112 in Prague 2011. The main changes with regard to IEC 6206
33、8-1:2003 concern the terms and definitions which are now aligned, in part, on IEC/TS 61934 11and IEC/TS 60034-18-42 2. _ 1Figures in square brackets refer to the bibliography. 4 62068 IEC:2013 The text of this standard is based on the following documents: FDIS Report on voting 112/234/FDIS 112/242/R
34、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. The committee has decided that the contents of this publication will remain unch
35、anged 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. 62068 IEC:2013 5 ELECTRICAL INSULATING MATERIALS AND SY
36、STEMS GENERAL METHOD OF EVALUATION OF ELECTRICAL ENDURANCE UNDER REPETITIVE VOLTAGE IMPULSES 1 Scope This International Standard applies to electrical equipment, regardless of voltage, containing an insulation system, which is connected to an electronic power supply, and requires an evaluation of in
37、sulation endurance under repetitive voltage impulses. This standard proposes a general test procedure to facilitate screening of electrical insulating materials (EIM) and systems (EIS) and to achieve a relative evaluation of insulation endurance under conditions of repetitive impulses. 2 Normative r
38、eferences 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 edition of the referenced document (including any amendments) applie
39、s. IEC 62539, Guide for the statistical analysis of electrical insulation breakdown data 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 electrical insulating material EIM material with negligibly low electric conductivity, used to separate c
40、onducting parts at different electrical potentials SOURCE: IEC 60505:2011, definition 3.1.2 3 23.2 electrical insulation system EIS insulating structure containing one or more electrical insulating materials (EIM) together with associated conducting parts employed in an electrotechnical device SOURC
41、E: IEC 60505:2011, definition 3.1.1 2 3.3 candidate EIS EIS under evaluation to determine its electrical endurance when exposed to repetitive voltage impulses _ 2Figures in square brackets refer to the Bibliography. 6 62068 IEC:2013 3.4 reference EIS evaluated and established EIS with either a known
42、 service experience or a known comparative functional evaluation under repetitive voltage impulses 3.5 partial discharge PD electric discharge that only partially bridges the insulation between electrical conductors SOURCE: IEC 60270:2000, definition 3.1 modified 4 the word “localized“ (electrical d
43、ischarge) omitted from source definition, and definition shortened to omit reference to “which can or can not occur adjacent to a conductor“. Also the three NOTES after the term have been omitted 3.6 partial discharge pulse current pulse in an object under test that results from a partial discharge
44、occurring within the object under test Note 1 to entry: The pulse is measured using suitable detector circuits, which have been introduced into the test circuit for the purpose of the test. Note 2 to entry: A detector in accordance with the provisions of this standard produces a current or a voltage
45、 signal at its output related to the PD pulse at its input. SOURCE: IEC/TS 61934:2011, definition 3.3, modified In Note 2 to entry, “provisions“ of this technical specification“ edited to read “of this standard“ 3.7 repetitive partial discharge inception voltage RPDIV minimum peak-to-peak impulse vo
46、ltage at which more than five PD pulses occur on ten voltage impulses of the same polarity Note 1 to entry: This is a mean value for the specified test time and a test arrangement where the voltage applied to the test object is gradually increased from a value at which no partial discharge can be de
47、tected. SOURCE: IEC/TS 61934:2011, definition 3.4 3.8 repetitive partial discharge extinction voltage RPDEV maximum peak-to-peak impulse voltage at which less than five PD pulses occur on ten voltage impulses of the same polarity Note 1 to entry: This is a mean value for the specified test time and
48、a test arrangement where the voltage applied to the test object is gradually decreased from a value at which PD have been detected. SOURCE: IEC/TS 61934:2011, definition 3.5 3.9 partial discharge inception voltage PDIV lowest voltage at which partial discharges are initiated in the test arrangement,
49、 when the voltage applied to the object is gradually increased from a lower value at which no such discharges are observed 62068 IEC:2013 7 3.10 partial discharge extinction voltage PDEV highest voltage at which partial discharges are extinguished in the test arrangement, when the voltage applied to the object is gradually decreased from a higher value at which such discharg
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