SANS 60034-18-42-2009 Rotating electrical machines Part 18-42 Qualification and acceptance tests for partial discharge resistant electrical insulation systems (Type II) used in rotnve.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23268-9 SANS 60034-18-42:2009Edition 1IEC/TS 60034-18-42:2008Edition 1SOUTH AFRICAN NATIONAL STANDARD Rotating electrical machines Part 18

4、-42: Qualification and acceptance tests for partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters This national standard is the identical implementation of IEC/TS 60034-18-42:2008 and is adopted with the permission of the

5、 International Electrotechnical Commission. WARNING Can only be used in conjunction with SANS 60034-18-41. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 60034-18-42:2009 Edition 1 IEC

6、/TS 60034-18-42:2008 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS TC 61, Rotating electrical machinery, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT ag

7、reement. This SANS document was published in October 2009. IEC/TS 60034-18-42Edition 1.0 2008-08TECHNICAL SPECIFICATIONSPCIFICATION TECHNIQUERotating electrical machines Part 18-42: Qualification and acceptance tests for partial discharge resistant electrical insulation systems (Type II) used in rot

8、ating electrical machines fed from voltage converters Machines lectriques tournantes Partie 18-42: Essais de qualification et dacceptation des systmes disolation lectrique rsistants aux dcharges partielles (Type II) utiliss dans des machines lectriques tournantes alimentes par convertisseurs de tens

9、ion INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE VICS 29.160 PRICE CODECODE PRIXISBN 2-8318-9966-4 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale SANS 60034-18-42:2009This s t

10、andard may only be used and printed by approved subscription and freemailing clients of the SABS . 2 TS 60034-18-42 IEC:2008 CONTENTS FOREWORD.4INTRODUCTION.61 Scope.72 Normative references .73 Terms and definitions .84 Voltage effects from converter operation 104.1 Voltages at the terminals of the

11、converter-fed machine .104.2 Electrical stresses in the insulation system of machine windings .134.2.1 General .134.2.2 Voltages stressing the phase/phase insulation.144.2.3 Voltages stressing the phase/ground insulation .144.2.4 Voltages stressing the turn insulation 145 Type II insulation systems

12、146 Stress factors for converter-fed Type II insulation systems .157 Qualification and acceptance tests .167.1 General .167.2 Qualification tests167.3 Acceptance test.178 Qualification of turn insulation 178.1 General .178.2 Test methods 179 Qualification of ground wall insulation systems.199.1 Gene

13、ral .199.2 Test methods 199.3 Use of 50 Hz or 60 Hz life data to predict the service life with a converter drive2010 Qualification of the stress control and corona protection system.2110.1 General .2110.2 Test methods 2211 Preparation of test objects2311.1 General .2311.2 Turn/turn samples .2311.3 C

14、oils2412 Qualification test procedures 2412.1 General .2412.2 Turn/turn samples .2412.3 Coils2412.4 Stress control samples 2513 Qualification test pass criteria 2513.1 Turn/turn samples .2513.2 Coil samples .2513.3 Stress control samples 2614 Acceptance test for Type II insulation systems (Type test

15、)2614.1 General .2614.2 Acceptance test methods 26SANS 60034-18-42:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .TS 60034-18-42 IEC:2008 3 14.3 Acceptance test pass criteria.2615 Analysis, reporting and classification26Annex A (informat

16、ive) .27Annex B (informative) .29Annex C (informative) .31Figure 1 Voltage impulse waveshape parameters 10Figure 2 Phase/phase voltage at the terminals of a machine fed by a 3-level converter 11Figure 3 Possible jump voltages (Uj) at the machine terminals associated with a converter drive12Figure 4

17、Maximum voltage enhancement at the machine terminals as a function of cable length for various impulse rise times for a 2-level converter.13Figure 5 Design examples14Figure 6 Life lines of turn and mainwall insulation. .18Figure 7 Example of a life curve for a Type II mainwall insulation system.21Fi

18、gure 8 Example of the construction of a turn/turn test sample for rectangular conductors23Figure A.1 Example of a simple converter voltage simulation circuit.27Figure A.2 Typical waveform generated from the spark gap oscillator 28Figure B.1 Representation of the phase to ground voltage at the termin

19、als of a machine fed from a 3-level converter 29Table 1 Influence of features of the converter drive voltage on acceleration of ageing of components of Type II insulation systems.15Table B.1 Contribution to electrical ageing by 1 kHz impulses from a 3-level converter as a percentage of the ageing fr

20、om the 50 Hz fundamental voltage for various values of voltage endurance coefficient (n).30SANS 60034-18-42:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 TS 60034-18-42 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ROTATING EL

21、ECTRICAL MACHINES Part 18-42: Qualification and acceptance tests for partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for st

22、andardization 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 this end and in addition to other activities, IEC publishes

23、International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may partic

24、ipate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement betw

25、een 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 relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publicatio

26、ns have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for an

27、y misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding

28、 national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest ed

29、ition of this publication. 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 d

30、irect or indirect, or 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 indispe

31、nsable for the correct 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. The main task of IEC technical comm

32、ittees is to prepare International Standards. In exceptional circumstances, a technical committee may propose the publication of a technical specification when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts, or the subject is still

33、under technical development or where, for any other reason, there is the future but no immediate possibility of an agreement on an International Standard. Technical specifications are subject to review within three years of publication to decide whether they can be transformed into International Sta

34、ndards. IEC 60034-18-42, which is a Technical Specification, has been prepared by IEC technical committee 2: Rotating machinery. SANS 60034-18-42:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .TS 60034-18-42 IEC:2008 5 The text of this t

35、echnical specification is based on the following documents: Enquiry draft Report on voting 2/1482/DTS 2/1502/RVC Full information on the voting for the approval of this technical specification can be found in the report on voting indicated in the above table. This publication has been drafted in acc

36、ordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 60034 series, under the general title Rotating electrical machines, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicat

37、ed 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 transformed into an International standard, reconfirmed, withdrawn, replaced by a revised edition, or amended. SANS 60034-18-42:2009This s tandard may only be u

38、sed and printed by approved subscription and freemailing clients of the SABS . 6 TS 60034-18-42 IEC:2008 INTRODUCTION The approval of electrical insulation systems for use in rotating electrical machines driven from voltage converters is set out in two Technical Specifications. They separate the sys

39、tems into those which are not expected to experience partial discharge activity within specified conditions in their service lives (Type I) and those which are expected to withstand partial discharge activity in any part of the insulation system throughout their service lives (Type II). For both Typ

40、e I and Type II insulation systems, the drive system integrator should inform the machine manufacturer what voltage will appear at the machine terminals in service. The machine manufacturer will then decide upon the severity of the tests appropriate for qualifying the insulation system. The severity

41、 is based on the impulse rise time, the peak to peak voltage and, in the case of Type II systems, the impulse repetition rate. IEC/TS 60034-18-41 Type I insulation systems are dealt with in IEC/TS 60034-18-41. They are generally used in rotating machines rated at less than 700 V r.m.s. and tend to h

42、ave random wound stators. In this Technical Specification, the necessary normative references and definitions are given together with a review of the effects arising from converter operation. Having established the technical foundation for the evaluation procedure, the conceptual approach is then de

43、scribed. IEC/TS 60034-18-42 In this Technical Specification, the tests for qualification and acceptance of electrical insulation systems chosen for Type II rotating electrical machines are described. These insulation systems are generally used in rotating machines and tend to have form-wound coils,

44、mostly rated above 700 V r.m.s. The qualification procedure is completely different from that used for Type I insulation systems and involves destructive ageing of insulated test objects under accelerated conditions. The manufacturer requires a life curve for the insulation system that can be interp

45、reted to provide an estimate of life under the service conditions with converter drive. Great importance is attached to the qualification of any stress grading system that is used and testing here should be performed under repetitive impulse conditions. If the insulation system can be shown to provi

46、de an acceptable life under the appropriate ageing conditions, it is qualified for use. Acceptance testing is performed on coils made using this insulation system when subjected to a voltage endurance test. This Technical Specification should be read in conjunction with IEC/TS 60034-18-41, which pro

47、vides a background to the technology of converter drive/machine systems. The winding insulation systems intended for converter-fed machines and converter technologies are evolving rapidly. In addition, there is on-going research into the best ways to test such insulation systems. It is expected ther

48、efore that there will be improvements in these Technical Specifications over the next few years. SANS 60034-18-42:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .TS 60034-18-42 IEC:2008 7 ROTATING ELECTRICAL MACHINES Part 18-42: Qualifica

49、tion and acceptance tests for partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters 1 Scope This Technical Specification defines criteria for assessing the insulation system of stator/rotor windings of single or polyphase AC machines which are subjected to repetitive impulse voltages, such as pulse width modulation (PWM) converters, and expected to withstand partial discharge activity during service. It sp