EN IEC 60034-27-4-2018 Rotating electrical machines - ParT 27-4 Measurement of insulation resistance and polarization index on winding insulation of rotating el.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Rotating electrical machinesPart 27-4: Measurement of insulation resistance and polarization index on winding insulation of rotating electrical machinesBS EN IEC 60034-27-4:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISC

2、HE NORM EN IEC 60034-27-4 June 2018 ICS 29.160.01 English Version Rotating electrical machines - Part 27-4: Measurement of insulation resistance and polarization index on winding insulation of rotating electrical machines (IEC 60034-27-4:2018) Machines lectriques tournantes - Partie 27-4: Mesure de

3、la rsistance disolement et de lindex de polarisation sur le systme disolation des enroulements des machines lectriques tournantes (IEC 60034-27-4:2018) Drehende elektrische Maschinen - Teil 27-4: Messung des Isolationswiderstands und des Polarisationsindexes der Wicklungsisolierung drehender elektri

4、scher Maschinen (IEC 60034-27-4:2018) This European Standard was approved by CENELEC on 2018-02-28. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

5、Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by

6、 translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Repub

7、lic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Ki

8、ngdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means re

9、served worldwide for CENELEC Members. Ref. No. EN IEC 60034-27-4:2018 ENational forewordThis British Standard is the UK implementation of EN IEC 60034274:2018. It is identical to IEC 60034274:2018. The UK participation in its preparation was entrusted to Technical Committee PEL/2, Rotating electrica

10、l machinery.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published b

11、y BSI Standards Limited 2018ISBN 978 0 580 89217 2ICS 29.160.01Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2018.Amendments/corrigenda issued since p

12、ublicationDate Text affectedBRITISH STANDARDBS EN IEC 60034274:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IEC 60034-27-4 June 2018 ICS 29.160.01 English Version Rotating electrical machines - Part 27-4: Measurement of insulation resistance and polarization index on winding insulation o

13、f rotating electrical machines (IEC 60034-27-4:2018) Machines lectriques tournantes - Partie 27-4: Mesure de la rsistance disolement et de lindex de polarisation sur le systme disolation des enroulements des machines lectriques tournantes (IEC 60034-27-4:2018) Drehende elektrische Maschinen - Teil 2

14、7-4: Messung des Isolationswiderstands und des Polarisationsindexes der Wicklungsisolierung drehender elektrischer Maschinen (IEC 60034-27-4:2018) This European Standard was approved by CENELEC on 2018-02-28. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipula

15、te 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 Centre or to any CENELEC member. This European

16、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 status as the official versions. CENELEC members

17、 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, Lithuania, Luxembourg, Malta, the Netherlands, Norway

18、 Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre:

19、Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 60034-27-4:2018 EBS EN IEC 60034274:2018EN IEC 60034-27-4:2018 2 European foreword The text of document 2/1880/FDIS, future edition 1 of

20、IEC 60034-27-4:2018, prepared by IEC/TC 2 “Rotating machinery“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60034-27-4:2018. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical nat

21、ional standard or by endorsement (dop) 2018-12-29 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2021-06-29 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be

22、 held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60034-27-4:2018 was approved by CENELEC as a European Standard without any modification. BS EN IEC 60034274:2018EN IEC 60034-27-4:2018 3 Annex ZA (normative) Normative refer

23、ences to international publications with their corresponding European publications The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated referenc

24、es, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards lis

25、ted in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60050-411 - International Electrotechnical Vocabulary (IEV) - Chapter 411: Rotating machinery - - BS EN IEC 60034274:2018 2 IEC 60034-27-4:2018 IEC 2018 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope 8 2 Norma

26、tive references 8 3 Terms and definitions 8 4 Insulation resistance components and influence factors 10 5 Polarization index 10 6 Measurement . 11 6.1 Influences on the measurement of the insulation resistance 11 6.1.1 General . 11 6.1.2 Winding temperature correction . 11 6.2 Measuring equipment 12

27、 6.3 Test object and measuring circuit 13 6.3.1 General . 13 6.3.2 Three-phase stator windings 13 6.3.3 Other windings 14 6.4 Measuring voltage. 15 6.4.1 Type and magnitude 15 6.4.2 Polarity 15 6.5 Measuring time . 15 6.6 Safety . 15 6.7 Measurement procedures 15 6.7.1 Standard procedure . 15 6.7.2

28、Special procedures 16 7 Interpretation of measurement results 16 7.1 General . 16 7.2 Suitability for testing and operation . 16 7.3 Trending of insulation condition 17 7.4 Comparison between machines or between phases 17 7.5 Effects at very high values of insulation resistance . 17 7.6 Limitations

29、of the insulation resistance test . 17 8 Recommended limits of insulation resistance and polarization index 18 8.1 General . 18 8.2 Insulation resistance . 18 8.3 Polarization index . 18 9 Test report . 19 9.1 Operational aged windings 19 9.2 New windings 20 Annex A (informative) Components of the d

30、irect current 21 A.1 Total current IT. 21 A.2 Capacitive current IC21 A.3 Conduction current IG. 22 A.4 Polarization current IP23 A.5 Surface leakage current IL24 A.6 Stress control coating current IS. 24 BS EN IEC 60034274:2018IEC 60034-27-4:2018 IEC 2018 3 Annex B (informative) Graphical estimatio

31、n of the slope parameter X for temperature correction from measurement data 25 Annex C (informative) Examples of test results of synthetic resin based high voltage windings 27 C.1 Machine with dry and clean surface of the insulation . 27 C.2 Machine with a wet and contaminated surface 28 C.3 Machine

32、 with continuous stress control layers in galvanic contact with high voltage conductors 29 C.3.1 Stress control coating current IS29 C.3.2 Effects on insulation resistance and polarization index 30 C.3.3 Examples of test results. 30 Annex D (informative) Measurement of leakage current to assess inte

33、rphase insulation resistance 32 Annex E (informative) Other DC tests 34 E.1 General . 34 E.2 Dielectric absorption ratio (DAR) . 34 E.3 Monitoring charge and discharge currents . 35 E.4 High voltage DC tests . 37 E.4.1 General . 37 E.4.2 Uniform-time voltage step test . 37 E.4.3 Graded-time voltage

34、step test 37 E.4.4 Ramped-time voltage step test 37 E.5 Wet insulation resistance measurement 38 Bibliography 39 Figure 1 Equivalent circuit diagram of winding insulation in a DC voltage test . 10 Figure 2 Connection for testing of the entire winding 14 Figure 3 Connection for phase-to-earth measure

35、ment 14 Figure A.1 Relationships between different currents and time 21 Figure B.1 Graphical estimation of the slope parameter X in a semi-logarithmic diagram 26 Figure C.1 Total current versus time on a clean and dry insulation. The scales are logarithmic 27 Figure C.2 Insulation resistance versus

36、time on a clean and dry insulation 28 Figure C.3 Total current versus time on a wet and contaminated insulation 28 Figure C.4 Insulation resistance versus time on a wet and contaminated insulation 29 Figure C.5 Total current versus time on a dry and clean surface with a continuous stress control coa

37、ting 30 Figure C.6 Insulation resistance versus time on a dry and clean surface with a stress control coating 31 Figure D.1 Connection for phase-to-phase measurement. The test instrument shall be floating with respect to earth. Other phase to phase combinations are permitted . 32 Figure D.2 Measurem

38、ent of interphase leakage current with a measurement instrument equipped with a guard connection 33 Figure D.3 Measurement of interphase leakage current with a measurement instrument not equipped with a guard connection 33 Figure E.1 Measurement of current and insulation resistance that results in a

39、 DAR of 1,09 35 BS EN IEC 60034274:2018 4 IEC 60034-27-4:2018 IEC 2018 Figure E.2 Charge and discharge currents after a step voltage of 2,5 kV for the three-phase windings of a 50 MVA hydro-generator: . 36 Table 1 Values of the parameter X for the temperature correction 12 Table 2 Guidelines for DC

40、voltage magnitudes to be applied during the insulation resistance measurement . 15 Table 3 Recommended minimum insulation resistance values at a base temperature of 40 C 18 Table 4 Recommended minimum values of polarization index for high voltage insulation systems 19 Table B.1 Example data from ins

41、ulation resistance measurements at different winding temperatures 25 BS EN IEC 60034274:2018IEC 60034-27-4:2018 IEC 2018 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ROTATING ELECTRICAL MACHINES Part 27-4: Measurement of insulation resistance and polarization index of winding insulation of rotating

42、 electrical machines 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 concerning s

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