BS EN 60034-18-41-2014 Rotating electrical machines Partial discharge free electrical insulation systems (Type I) used in rotating electrical machines fed from voltage converters Q.pdf

1、BSI Standards PublicationRotating electrical machinesPart 1841: Partial discharge free electrical insulation systems (Type I) used in rotating electrical machines fed from voltage converters Qualification and quality control testsBS EN 60034-18-41:2014National forewordThis British Standard is the UK

2、 implementation of EN 60034-18-41:2014. Itis identical to IEC 60034-18-41:2014.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/2, Rotating electrical machinery.A list of organizations represented on this committee can be obtained onrequest to its secretary.This public

3、ation does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 73798 5ICS 29.160.01Compliance with a British Standard cannot confer immunity f

4、romlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60034-18-41:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60034-

5、18-41 June 2014 ICS 29.160 English Version Rotating electrical machines - Part 18-41: Partial discharge free electrical insulation systems (Type I) used in rotating electrical machines fed from voltage converters - Qualification and quality control tests (IEC 60034-18-41:2014) Machines lectriques to

6、urnantes - Partie 18-41: Systmes disolation lectrique sans dcharge partielle (Type I) utiliss dans des machines lectriques tournantes alimentes par des convertisseurs de tension - Essais de qualification et de contrle qualit (CEI 60034-18-41:2014) Drehende elektrische Maschinen - Teil 18-41: Qualifi

7、zierung und Qualittsprfungen fr teilentladungsfreie elektrische Isoliersysteme (Typ I) in drehenden elektrischen Maschinen, die von Spannungsumrichtern gespeist werden (IEC 60034-18-41:2014) This European Standard was approved by CENELEC on 2014-04-10. CENELEC members are bound to comply with the CE

8、N/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Ce

9、ntre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same sta

10、tus as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani

11、a, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische No

12、rmung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60034-18-41:2014 E BS EN 60034-18-41:2014EN 60034-18-41:2014 - 2 - Foreword The text of document 2/1728/FDIS

13、, future edition 1 of IEC 60034-18-41, prepared by IEC/TC 2 “Rotating machinery“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60034-18-41:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of a

14、n identical national standard or by endorsement (dop) 2015-01-10 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-04-10 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENEL

15、EC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60034-18-41:2014 was approved by CENELEC as a European Standard without any modification. BS EN 60034-18-41:2014- 3 - EN 60034-18-41:2014 Annex ZA

16、(normative) Normative references to international publications with their corresponding European publications 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

17、 undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60034-18-1 2010 Rotating elec

18、trical machines Part 18-1: Functional evaluation of insulation systems - General guidelines EN 60034-18-1 2010 IEC 60034-18-21 - Rotating electrical machines Part 18-21: Functional evaluation of insulation systems - Test procedures for wire-wound windings - Thermal evaluation and classification EN 6

19、0034-18-21 - IEC 60034-18-31 - Rotating electrical machines Part 18-31: Functional evaluation of insulation systems - Test procedures for form-wound windings - Thermal evaluation and classification of insulation systems used in rotating machines EN 60034-18-31 - IEC 60172 - Test procedure for the de

20、termination of the temperature index of enamelled winding wires EN 60172 - IEC 60664-1 - Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests EN 60664-1 - IEC/TS 60034-18-42 - Rotating electrical machines Part 18-42: Qualification and acceptance

21、 tests for partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters CLC/TS 60034-18-42 - IEC/TS 60034-25 2007 Rotating electrical machines Part 25: Guidance for the design and performance of a.c. motors specifically designed

22、 for converter supply CLC/TS 60034-25 2008 BS EN 60034-18-41:2014EN 60034-18-41:2014 - 4 - IEC/TS 60034-27 - Rotating electrical machines Part 27: Off-line partial discharge measurements on the stator winding insulation of rotating electrical machines CLC/TS 60034-27 - IEC/TS 61800-8 - Adjustable sp

23、eed electrical power drive systems Part 8: Specification of voltage on the power interface - - IEC/TS 61934 - Electrical insulating materials and systems - Electrical measurement of partial discharges (PD) under short rise time and repetitive voltage impulses - - BS EN 60034-18-41:2014 2 IEC 60034-1

24、8-41:2014 IEC 2014 CONTENTS INTRODUCTION . 7 1 Scope 9 2 Normative references 9 3 Terms and definitions 10 4 Machine terminal voltages arising from converter operation . 13 5 Electrical stresses in the insulation system of machine windings . 17 5.1 General 17 5.2 Voltages stressing the phase/phase i

25、nsulation . 18 5.3 Voltages stressing the phase/ground insulation 18 5.4 Voltages stressing the turn and strand insulation . 18 5.5 Mechanisms of insulation degradation . 19 6 Types of machine insulation 20 7 Stress categories for Type I insulation systems used in converter fed machines 20 8 Design

26、qualification and type tests for Type I insulation systems . 22 8.1 General 22 8.2 Design qualification test . 22 8.3 Type test 22 9 Test equipment 22 9.1 PD measurement at power frequency . 22 9.2 PD measurement during voltage impulses 22 9.3 Voltage impulse generators 23 9.4 Sensitivity 23 9.5 PD

27、tests . 23 9.5.1 Power frequency voltage 23 9.5.2 Impulse excitation . 23 10 Qualification of the design of Type I insulation systems . 23 10.1 General 23 10.2 Approach . 24 10.2.1 General 24 10.2.2 Twisted pair or equivalent arrangement 24 10.2.3 Motorette (random wound) or formette (form-wound) 24

28、 10.2.4 Complete windings . 24 10.3 Preparation of test objects . 25 10.3.1 General 25 10.3.2 Turn/turn insulation samples . 25 10.3.3 Motorette/formette test samples or complete windings 25 10.4 Design qualification tests . 26 10.4.1 General 26 10.4.2 Pre-diagnostic tests 26 10.4.3 Diagnostic tests

29、 26 10.4.4 Ageing cycle . 26 10.4.5 PD tests . 26 10.5 Pass criterion for the design qualification test 27 11 Type test procedure for Type I insulation systems . 27 11.1 General 27 BS EN 60034-18-41:2014IEC 60034-18-41:2014 IEC 2014 3 11.2 Power frequency PD tests 27 11.3 Impulse PD tests 28 12 Rout

30、ine tests . 28 13 Analysis, reporting and classification . 28 Annex A (informative) Derivation of possible terminal voltages in service for a converter-fed machine 29 A.1 Calculation of d.c. bus voltage . 29 A.2 Calculation of maximum peak voltages for a 2-level converter . 30 Annex B (normative) De

31、rivation of test voltages for Type I insulation systems . 32 B.1 Stress categories . 32 B.2 Requirements for the applied impulse voltage 32 B.3 Enhancement factors for PD tests 33 B.4 Voltage for design qualification and type tests . 34 B.5 Examples of maximum peak/peak operating voltages . 37 B.6 C

32、alculation of test voltages 37 Annex C (normative) Derivation of allowable voltages in service 39 C.1 Impulse voltage insulation class (IVIC) of the machine . 39 C.2 Impulse voltage insulation class assigned in special designs . 39 Bibliography 41 Figure 1 Voltage impulse waveshape parameters 13 Fig

33、ure 2 Five step phase to phase voltage at the terminals of a machine fed by a 3-level converter 15 Figure 3 Jump voltage (Uj) at the machine terminals associated with a converter drive . 15 Figure 4 Voltage enhancement at the terminals of a motor due to reflection as a function of cable length for v

34、arious impulse rise times 17 Figure 5 Example of a random wound design . 18 Figure 6 Example of a form-wound design . 18 Figure 7 Worst case voltage stressing the turn/turn insulation in a variety of random wound stators as a function of the rise time of the impulse . 19 Figure A.1 Circuit diagram f

35、or a converter/machine system 29 Figure B.1 Forbidden zone (shaded) for impulse tests . 33 Figure B.2 Examples of test waveforms . 33 Figure B.3 Comparison of phase/phase, phase/ground, and turn/turn voltages for a 2-level converter . 35 Figure B.4 Impulse test voltage waveforms and the levels for a

36、pplying the same peak/peak voltage of 2aUjon the turn/turn insulation (schematic representation) 36 Figure B.5 Test voltages for phase/ground and turn/turn impulse tests using a unipolar impulse . 38 Table 1 Common ranges of characteristics of the terminal voltages of converter fed machines 14 Table

37、 2 Definition of symbols . 14 Table 3 Influence of features of the machine terminal voltage on components of Type I insulation systems 21 Table 4 Stress categories for Type I insulation systems based on a 2-level converter 21 Table 5 Allowable voltage waveforms for testing system components 25 BS EN

38、 60034-18-41:2014 4 IEC 60034-18-41:2014 IEC 2014 Table A.1 Examples of maximum peak voltages . 31 Table B.1 Summary of stress categories 32 Table B.2 Summary of enhancement factors to be applied to the operating voltages 34 Table B.3 Maximum peak/peak operating voltages related to Udcfor a 2-level

39、converter according to the stress categories of Table 4 36 Table B.4 Examples of maximum peak/peak operating voltage for a 500 V r.m.s. rated winding fed from a 2-level converter, according to the stress categories of Table 4. 37 Table B.5 Examples of maximum peak/peak test voltage for a 500 V rated

40、 winding fed from a 2-level converter, according to the stress categories of Table 4 and with EF 1,25 37 Table B.6 Turn/turn PD test levels for special windings and twisted pairs . 38 Table C.1 Maximum allowable operating voltage at the machine terminals in units of UN. 39 BS EN 60034-18-41:2014IEC

41、60034-18-41:2014 IEC 2014 7 INTRODUCTION The approval of electrical insulation systems for use in rotating electrical machines driven from voltage converters is set out in two IEC documents. They divide the systems into those which are not expected to experience partial discharge activity within spe

42、cified 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 Type I and Type II insulation systems, the drive system integrator (the person responsible fo

43、r co-ordinating the electrical performance of the entire drive system) shall 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 se

44、verity is based on the impulse rise time, the peak to peak voltage and, in the case of Type II systems, the impulse repetition rate. After installation of the converter/machine system, it is recommended that the drive system integrator measures the phase/phase and phase/ground voltages between the m

45、achine terminals and ground to check for compliance. IEC 60034-18-41 The Type I systems are dealt with in this standard. They are generally used in rotating machines rated at 700 V r.m.s. or less and tend to have random wound windings. The procedures described here are directed at: Qualification of

46、the insulation system. Type and routine testing of the complete windings of service machines. Before undertaking any testing, the machine manufacturer shall decide upon the level of severity that the system will be required to withstand. The severity is based on how large the voltage overshoot and h

47、ow short the impulse rise time will be at the machine terminals. The machine designer then makes a choice from a table in which the range of expected overshoot voltage is divided into bands. Testing is performed at the extreme value of each band. A default value of 0,3 s is attributed to the impulse

48、 rise time. Other values of impulse rise time or voltage overshoot are dealt with as special cases. In qualification testing, the insulation system is used to construct various representative test objects. These are subjected to the range of tests described in IEC 60034-18-21 or IEC 60034-18-31 with

49、 the addition of a high frequency voltage test and a partial discharge test. For the latter, it may be necessary to use impulse test equipment, as described in IEC/TS 61934. If the test object is partial discharge free under the specified test conditions at the end of the sequence of testing, the insulation system is qualified for the severity band that has been selected. Type and optional routine tests are performed on complete windings to demonstrate that