IEC 60034-18-32:2022
(Main)Rotating electrical machines - Part 18-32: Functional evaluation of insulation systems (Type II) - Electrical endurance qualification procedures for form-wound windings
Rotating electrical machines - Part 18-32: Functional evaluation of insulation systems (Type II) - Electrical endurance qualification procedures for form-wound windings
IEC 60034-18-32:2022 describes qualification procedures for the evaluation of electrical endurance of insulation systems for use in rotating electrical machines using form-wound windings energized with sinusoidal power frequency voltage. The test procedures for the main wall insulation are comparative in nature, such that the performance of a candidate insulation system is compared to that of a reference insulation system with proven service experience. If no reference system is available, the diagram in Annex A is available for use. The qualification procedures of inverter duty insulation system for form-wound windings can be found in IEC 60034-18-42 or IEC 60034-18-41. A new and informative test procedure for the stress control system is introduced and defined in Annex B.
This second edition cancels and replaces the first edition published in 2010. This edition includes the following significant technical changes with respect to the previous edition:
a. Title modified.
b. Simplification of clauses.
c. Reduction in the number of test procedures.
d. Inclusion of full bars and coils as test objects.
e. A new clause dealing with failures and failure criteria.
Machines électriques tournantes - Partie 18-32: Evaluation fonctionnelle des systèmes d'isolation (Type II) - Procédures de qualification de l'endurance électrique pour enroulements préformés
IEC 60034-18-32:2022 décrit les procédures de qualification pour l'évaluation de l'endurance électrique des systèmes d'isolation utilisés dans les machines électriques tournantes à enroulements préformés sous tension sinusoïdale à la fréquence d'alimentation. Les procédures d'essai pour l'isolation principale sont comparatives, puisque les performances d'un système d'isolation candidat sont comparées à celles d'un système d'isolation de référence dont l'expérience en service a été démontrée. Si aucun système de référence n'est disponible, l'Annexe A décrit un diagramme utilisable. Les procédures de qualification d'un système d'isolation d'onduleur pour enroulements préformés peuvent être consultées dans l'IEC 60034‑18-42 ou l'IEC 60034-18-41. Une nouvelle procédure d'essai informative pour systèmes de contrôle de contrainte est introduite et définie à l'Annexe B.
Cette deuxième édition annule et remplace la première édition parue en 2010. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a. modification du titre;
b. simplification des articles;
c. diminution du nombre de procédures d'essai;
d. inclusion de barres et bobines complètes comme éprouvettes;
e. ajout d'un article qui traite des défaillances et des critères de défaillance.
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IEC 60034-18-32 ®
Edition 2.0 2022-01
COMMENTED VERSION
INTERNATIONAL
STANDARD
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Rotating electrical machines –
Part 18-32: Functional evaluation of insulation systems (Type II) –
Electrical endurance qualification procedures for form-wound windings
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 mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
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International Standards for all electrical, electronic and related technologies.
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IEC 60034-18-32 ®
Edition 2.0 2022-01
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Rotating electrical machines –
Part 18-32: Functional evaluation of insulation systems (Type II) –
Electrical endurance qualification procedures for form-wound windings
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.160.01 ISBN 978-2-8322-4022-9
– 2 – IEC 60034-18-32:2022 CMV © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General considerations . 10
4.1 Relationship to IEC 60034-18-1 . 10
4.2 Selection and designation of test procedures . 10
4.3 Reference insulation system . 11
4.4 Test procedures (IEC 61251) . 11
4.4.1 General . 11
4.4.2 Electrical ageing of the mainwall insulation . 11
4.4.3 Electrical ageing of the stress control system . 11
4.4.4 Electrical ageing of the turn insulation . 12
4.5 Extent of tests . 12
4.5.1 Full evaluation of the mainwall insulation . 12
4.5.2 Reduced evaluation of the mainwall insulation . 12
4.5.3 Evaluation of the stress control system . 12
5 Test objects . 13
5.1 Construction of test objects . 13
5.2 Number of turns .
5.2 Number of test specimens . 13
5.3 Initial quality control tests . 13
6 Electrical ageing . 14
6.1 General . 14
6.2 Voltage levels and intended test lives of the mainwall insulation . 14
6.3 Test temperatures during electrical endurance testing of the mainwall
insulation . 14
6.3.1 Electrical ageing at room temperature . 14
6.3.2 Electrical ageing at elevated temperature . 14
6.3.3 Ageing procedure for the mainwall insulation . 14
6.4 Ageing procedure for the turn insulation .
6.4 Maintenance of stress grading control coatings . 15
7 Diagnostic sub-cycle . 15
7.1 General . 15
7.2 Voltage tests of the mainwall insulation. 15
7.2.1 Mainwall insulation test .
7.2.2 Turn insulation impulse test .
7.2.3 Turn insulation power frequency test .
7.3 Other diagnostic tests . 16
8 Failures of the mainwall insulation . 16
8.1 Failure location and verification. 16
8.2 Failed specimen observations . 16
8.3 Dimensional measurements .
9 Functional evaluation of the mainwall data . 17
9.1 General . 17
9.2 Full evaluation (same voltage level and same expected service life) . 17
9.3 Reduced evaluation (same voltage level and same expected service life) . 21
9.4 Recommended data to be recorded . 23
9.5 Determining qualification for performances different to the reference system . 24
9.5.1 Overview . 24
9.5.2 Case B: Qualification for the same phase to phase voltage and a
different expected service life . 24
9.5.3 Case C: Qualification for different voltage level and same expected
service life . 25
9.5.4 Case D: Qualification for different voltage level and different expected
service life . 26
9.5.5 Non-linearity of regression lines. 27
Annex A (normative) Reference life line for mainwall insulation in the absence of a
manufacturer’s reference life line . 28
Annex B (informative) . 29
B.1 Electrical ageing of the conductive slot coating . 29
B.2 Electrical ageing of the stress control coating . 29
B.3 Test objects . 29
B.4 Evaluation of the stress control system . 29
B.5 Ageing procedure for the conductive slot and stress control coating. 30
B.5.1 General . 30
B.5.2 Arrangement of temperature control by heater plates . 30
B.5.3 Heating by means of an oven . 30
B.5.4 Test parameter . 30
B.6 Qualification of the stress control system . 31
B.6.1 General . 31
B.6.2 Test procedure . 31
B.6.3 Test pass criteria . 31
B.7 Examples of deterioration marks at the stress control system . 32
Bibliography .
List of comments . 34
Figure 1 – Comparison of ageing data from candidate (C) and reference (R) insulation
systems showing qualification . 19
Figure 2 – Comparison of ageing data from candidate and reference insulation systems
showing failure to qualify . 21
Figure 3 – Comparison of reduced evaluation test data from four separate candidate
systems with that from the reference system . 23
Figure 4 – Candidate system qualified for the same voltage level and different expected
service life . 25
Figure 5 – Candidate system qualified for a higher voltage level and the same expected
service life . 26
Figure 6 – Candidate system qualified for a different service life and different voltage
level from the reference . 27
Figure A.1 – Reference lifeline for mainwall insulation . 28
Figure B.1 – Application of heater elements to a stator bar . 30
Figure B.2 – Typical deterioration mark at the conductive slot coating . 32
– 4 – IEC 60034-18-32:2022 CMV © IEC 2022
Table 1 – Test procedure designations .
Table 1 – Conditions for qualification of candidate system . 24
Table B.1 – Phase to ground test voltages and test temperatures . 31
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 18-32: Functional evaluation of insulation systems (Type II) –
Test Electrical endurance qualificat
...
IEC 60034-18-32 ®
Edition 2.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –
Part 18-32: Functional evaluation of insulation systems (Type II) –
Electrical endurance qualification procedures for form-wound windings
Machines électriques tournantes –
Partie 18-32: Evaluation fonctionnelle des systèmes d'isolation (Type II) –
Procédures de qualification de l'endurance électrique pour enroulements
préformés
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 mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Secretariat Tel.: +41 22 919 02 11
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Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
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and withdrawn publications.
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containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 60034-18-32 ®
Edition 2.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –
Part 18-32: Functional evaluation of insulation systems (Type II) –
Electrical endurance qualification procedures for form-wound windings
Machines électriques tournantes –
Partie 18-32: Evaluation fonctionnelle des systèmes d'isolation (Type II) –
Procédures de qualification de l'endurance électrique pour enroulements
préformés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-1047-8
– 2 – IEC 60034-18-32:2022 © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General considerations . 9
4.1 Relationship to IEC 60034-18-1 . 9
4.2 Selection and designation of test procedures . 9
4.3 Reference insulation system . 9
4.4 Test procedures . 9
4.4.1 General . 9
4.4.2 Electrical ageing of the mainwall insulation . 9
4.4.3 Electrical ageing of the stress control system . 10
4.4.4 Electrical ageing of the turn insulation . 10
4.5 Extent of tests . 10
4.5.1 Full evaluation of the mainwall insulation . 10
4.5.2 Reduced evaluation of the mainwall insulation . 10
4.5.3 Evaluation of the stress control system . 10
5 Test objects . 10
5.1 Construction of test objects . 10
5.2 Number of test specimens . 11
5.3 Initial quality control tests . 11
6 Electrical ageing . 11
6.1 General . 11
6.2 Voltage levels and intended test lives of the mainwall insulation . 11
6.3 Test temperatures during electrical endurance testing of the mainwall
insulation . 11
6.3.1 Electrical ageing at room temperature . 11
6.3.2 Electrical ageing at elevated temperature . 12
6.3.3 Ageing procedure for the mainwall insulation . 12
6.4 Maintenance of stress control coatings . 12
7 Diagnostic sub-cycle . 12
7.1 General . 12
7.2 Voltage test of the mainwall insulation . 12
7.3 Other diagnostic tests . 13
8 Failures of the mainwall insulation . 13
8.1 Failure location and verification. 13
8.2 Failed specimen observations . 13
9 Functional evaluation of the mainwall data . 13
9.1 General . 13
9.2 Full evaluation (same voltage level and same expected service life) . 13
9.3 Reduced evaluation (same voltage level and same expected service life) . 15
9.4 Recommended data to be recorded . 16
9.5 Determining qualification for performances different to the reference system . 17
9.5.1 Overview . 17
9.5.2 Case B: Qualification for the same phase to phase voltage and a
different expected service life . 17
9.5.3 Case C: Qualification for different voltage level and same expected
service life . 18
9.5.4 Case D: Qualification for different voltage level and different expected
service life . 19
9.5.5 Non-linearity of regression lines. 20
Annex A (normative) Reference life line for mainwall insulation in the absence of a
manufacturer’s reference life line . 21
Annex B (informative) . 22
B.1 Electrical ageing of the conductive slot coating . 22
B.2 Electrical ageing of the stress control coating . 22
B.3 Test objects . 22
B.4 Evaluation of the stress control system . 22
B.5 Ageing procedure for the conductive slot and stress control coating. 23
B.5.1 General . 23
B.5.2 Arrangement of temperature control by heater plates . 23
B.5.3 Heating by means of an oven . 23
B.5.4 Test parameter . 23
B.6 Qualification of the stress control system . 24
B.6.1 General . 24
B.6.2 Test procedure . 24
B.6.3 Test pass criteria . 24
B.7 Examples of deterioration marks at the stress control system . 25
Figure 1 – Comparison of ageing data from candidate (C) and reference (R) insulation
systems showing qualification . 14
Figure 2 – Comparison of ageing data from candidate and reference insulation systems
showing failure to qualify . 15
Figure 3 – Comparison of re
...
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