EN IEC 60034-27-4:2018

Rotating electrical machines - Part 27-4: Measurement of insulation resistance and polarization index on winding insulation of rotating electrical machines

This part of IEC 60034 provides recommended test procedures for the measurement of insulation resistance and polarization index of stator and rotor winding insulation of rotating electrical machines. This document recommends minimum acceptable values of insulation resistance and polarization index of winding insulation valid for fully processed low and high voltage AC and DC rotating electrical machines with a rated power of 750 W or higher.

Drehende elektrische Maschinen - Teil 27-4: Messung des Isolationswiderstands und des Polarisationsindexes der Wicklungsisolierung drehender elektrischer Maschinen

Machines électriques tournantes - Partie 27-4: Mesure de la résistance d’isolement et de l’index de polarisation sur le système d’isolation des enroulements des machines électriques tournantes

La présente partie de l’IEC 60034 fournit des procédures d’essai recommandées pour la mesure de la résistance d’isolement et de l’index de polarisation de l’isolation des enroulements de stator et de rotor des machines électriques tournantes. Ce document recommande des valeurs minimales acceptables pour la résistance d’isolement et l’index de polarisation de l’isolation d’enroulement, applicables pour des machines tournantes à l’état fini, haute et basse tension en courant alternatif et en courant continu d’une puissance assignée de 750 W ou plus.

Električni rotacijski stroji - 27-4. del: Merjenje izolacijske upornosti in indeksa polarizacije izolacije navitja električnih rotacijskih strojev (IEC 60034-27-4:2018)

Ta del standarda IEC 60034 podaja priporočene preskusne postopke za merjenje izolacijske upornosti ter indeksa polarizacije statorske in rotorske izolacije navitja električnih rotacijskih strojev.
Ta dokument priporoča najmanjše sprejemljive vrednosti izolacijske upornosti in indeksa polarizacije izolacije navitja, ki velja za popolnoma obdelane nizko- in visokonapetostne električne rotacijske stroje z izmeničnim in enosmernim tokom ter nazivno močjo najmanj 750 W.

General Information

• Status: Published
• Publication Date: 28-Jun-2018
• Withdrawal Date: 28-Dec-2021
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: CLC/TC 2 - Rotating machinery
• Drafting Committee: IEC/TC 2 - IEC_TC_2
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 29-Jun-2018
• Completion Date: 29-Jun-2018
• Ref Project: SIST EN IEC 60034-27-4:2018 - Rotating electrical machines - Part 27-4: Measurement of insulation resistance and polarization index of winding insulation of rotating electrical machines (IEC 60034-27-4:2018)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60034-27-4:2018
01-oktober-2018
(OHNWULþQLURWDFLMVNLVWURMLGHO0HUMHQMHL]RODFLMVNHXSRUQRVWLLQLQGHNVD
SRODUL]DFLMHL]RODFLMHQDYLWMDHOHNWULþQLKURWDFLMVNLKVWURMHY,(&
Rotating electrical machines - Part 27-4: Measurement of insulation resistance and
polarization index of winding insulation of rotating electrical machines (IEC 60034-27-
4:2018)
Drehende elektrische Maschinen - Teil 27-4: Messung des Isolationswiderstands und
des Polarisationsindexes der Wicklungsisolierung drehender elektrischer Maschinen
(IEC 60034-27-4:2018)
Machines électriques tournantes - Partie 27-4: Mesure de la résistance d'isolement et de
l'index de polarisation sur le système d'isolation des enroulements des machines
électriques tournantes (IEC 60034-27-4:2018)
Ta slovenski standard je istoveten z: EN IEC 60034-27-4:2018
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST EN 60034-27-4:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 60034-27-4:2018
SIST EN 60034-27-4:2018
EUROPEAN STANDARD EN IEC 60034-27-4

NORME EUROPÉENNE
EUROPÄISCHE NORM
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 électriques tournantes - Partie 27-4: Mesure de la Drehende elektrische Maschinen - Teil 27-4: Messung des
résistance d'isolement et de l'index de polarisation sur le
Isolationswiderstands und des Polarisationsindexes der
système d'isolation des enroulements des machines Wicklungsisolierung drehender elektrischer Maschinen
électriques tournantes (IEC 60034-27-4:2018)
(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.
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 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 Republic,
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 Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für 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 reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60034-27-4:2018 E

SIST EN 60034-27-4:2018
European foreword
The text of document 2/1880/FDIS, future edition 1 of 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:
(dop) 2018-12-29
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-06-29
standards conflicting with the
document have to be withdrawn
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 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.
SIST EN 60034-27-4:2018
Annex ZA
(normative)
Normative references 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 references, 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 listed 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

SIST EN 60034-27-4:2018
SIST EN 60034-27-4:2018
IEC 60034-27-4 ®
Edition 1.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –

Part 27-4: Measurement of insulation resistance and polarization index of

winding insulation of rotating electrical machines

Machines électriques tournantes –

Partie 27-4: Mesure de la résistance d’isolement et de l’index de polarisation sur

le système d’isolation des enroulements des machines électriques tournantes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-5252-9

SIST EN 60034-27-4:2018
– 2 – IEC 60034-27-4:2018 © IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative 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
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 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 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 direct current . 21
A.1 Total current I . 21
T
A.2 Capacitive current I . 21
C
A.3 Conduction current I . 22
G
A.4 Polarization current I . 23
P
A.5 Surface leakage current I . 24
L
A.6 Stress control coating current I . 24
S
SIST EN 60034-27-4:2018
IEC 60034-27-4:2018 © IEC 2018 – 3 –
Annex B (informative) Graphical estimation 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 with continuous stress control layers in galvanic contact with high
voltage conductors . 29
C.3.1 Stress control coating current I . 29
S
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 interphase
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 step test . 37
E.4.4 Ramped-time voltage step test . 37
E.5 Wet insulation resistance measurement .
...

SLOVENSKI STANDARD
01-oktober-2018
Električni rotacijski stroji - 27-4. del: Merjenje izolacijske upornosti in indeksa
polarizacije izolacije navitja električnih rotacijskih strojev (IEC 60034-27-4:2018)
Rotating electrical machines - Part 27-4: Measurement of insulation resistance and
polarization index of winding insulation of rotating electrical machines (IEC 60034-27-
4:2018)
Drehende elektrische Maschinen - Teil 27-4: Messung des Isolationswiderstands und
des Polarisationsindexes der Wicklungsisolierung drehender elektrischer Maschinen
(IEC 60034-27-4:2018)
Machines électriques tournantes - Partie 27-4: Mesure de la résistance d'isolement et de
l'index de polarisation sur le système d'isolation des enroulements des machines
électriques tournantes (IEC 60034-27-4:2018)
Ta slovenski standard je istoveten z: EN IEC 60034-27-4:2018
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60034-27-4

NORME EUROPÉENNE
EUROPÄISCHE NORM
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 électriques tournantes - Partie 27-4: Mesure de la Drehende elektrische Maschinen - Teil 27-4: Messung des
résistance d'isolement et de l'index de polarisation sur le
Isolationswiderstands und des Polarisationsindexes der
système d'isolation des enroulements des machines Wicklungsisolierung drehender elektrischer Maschinen
électriques tournantes (IEC 60034-27-4:2018)
(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.
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 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 Republic,
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 Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für 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 reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60034-27-4:2018 E

European foreword
The text of document 2/1880/FDIS, future edition 1 of 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:
(dop) 2018-12-29
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-06-29
standards conflicting with the
document have to be withdrawn
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 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.
Annex ZA
(normative)
Normative references 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 references, 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 listed 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

IEC 60034-27-4 ®
Edition 1.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –

Part 27-4: Measurement of insulation resistance and polarization index of

winding insulation of rotating electrical machines

Machines électriques tournantes –

Partie 27-4: Mesure de la résistance d’isolement et de l’index de polarisation sur

le système d’isolation des enroulements des machines électriques tournantes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-5252-9

– 2 – IEC 60034-27-4:2018 © IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative 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
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 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 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 direct current . 21
A.1 Total current I . 21
T
A.2 Capacitive current I . 21
C
A.3 Conduction current I . 22
G
A.4 Polarization current I . 23
P
A.5 Surface leakage current I . 24
L
A.6 Stress control coating current I . 24
S
IEC 60034-27-4:2018 © IEC 2018 – 3 –
Annex B (informative) Graphical estimation 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 with continuous stress control layers in galvanic contact with high
voltage conductors . 29
C.3.1 Stress control coating current I . 29
S
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 interphase
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 step test . 37
E.4.4 Ramped-time voltage step test . 37
E.5 Wet insulation resistance mea
...