Rotating electrical machines - Part 18-21: Functional evaluation of insulation systems - Test procedures for wire-wound windings - Thermal evaluation and classification

IEC 60034-18-21:2012 gives test procedures for the thermal evaluation and classification of insulation systems used or proposed for use in wire-wound alternating current (a.c.) or direct current (d.c.) rotating electrical machines. The test performance of a candidate insulation system is compared to the test performance of a reference insulation system with proven service experience. The main technical changes with regard to the previous edition can be seen in the introduction of some basic statistical methods in the evaluation of comparative data. Moreover, the standard states a simpler use of different test procedures.

Drehende elektrische Maschinen - Teil 18-21: Funktionelle Bewertung von Isoliersystemen - Prüfverfahren für Runddrahtwicklungen - Thermische Bewertung und Klassifizierung

Machines électriques tournantes - Partie 18-21: Evaluation fonctionnelle des systèmes d'isolation - Procédures d'essai pour enroulements à fils - Evaluation thermique et classification

La CEI 60034-18-21:2012 donne des procédures d'essai pour l'évaluation thermique et la classification des systèmes d'isolation utilisés ou que l'on se propose d'utiliser dans les machines électriques tournantes à enroulements à fils à courant alternatif ou à courant continu. La performance d'essai d'un système d'isolation candidat est comparée à la performance d'essai d'un système d'isolation de référence dont l'expérience en service a été démontrée. La principale modification technique par rapport à l'édition précédente est l'introduction de certaines méthodes statistiques élémentaires utilisées pour l'évaluation des données comparatives. La norme présente en outre une utilisation plus simple des différentes procédures d'essai.

Električni rotacijski stroji - 18-21. del: Funkcionalno ocenjevanje izolacijskih sistemov - Preskuševalni postopki za navitja z okroglo žico - Toplotno ocenjevanje in klasificiranje (IEC 60034-18-21:2012)

Ta del standarda IEC 60034 vključuje preskuševalne postopke za toplotno ocenjevanje in klasificiranje izolacijskih sistemov, ki se uporabljajo oziroma so namenjeni za električne rotacijske stroje z okroglo žico z izmeničnim ali enosmernim tokom. Preskusno delovanje kandidatnega izolacijskega sistema se primerja s preskusnim delovanjem referenčnega izolacijskega sistema z dokazanimi izkušnjami pri uporabi. Standard IEC 60034-18-1 opisuje splošna preskuševalna načela, ki se uporabljajo za preskušanje toplotne vzdržljivosti izolacijskih sistemov, uporabljenih pri električnih rotacijskih strojih. Upoštevajo se načela standarda IEC 60034-18-1, razen če v standardu IEC 60034-18-21 ni navedeno drugače.

General Information

Status
Published
Publication Date
28-Mar-2013
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
24-Jan-2013
Completion Date
29-Mar-2013

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SLOVENSKI STANDARD
SIST EN 60034-18-21:2013
01-maj-2013
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Rotating electrical machines - Part 18-21: Functional evaluation of insulation systems -

Test procedures for wire-wound windings - Thermal evaluation and classification (IEC

60034-18-21:2012)
Drehende elektrische Maschinen - Teil 18-21: Funktionelle Bewertung von

Isoliersystemen - Prüfverfahren für Runddrahtwicklungen - Thermische Bewertung und

Klassifizierung (IEC 60034-18-21:2012)

Machines électriques tournantes - Partie 18-21: Evaluation fonctionnelle des systèmes

d'isolation - Procédures d'essai pour enroulements à fils - Evaluation thermique et

classification (CEI 60034-18-21:2012)
Ta slovenski standard je istoveten z: EN 60034-18-21:2013
ICS:
29.080.30 Izolacijski sistemi Insulation systems
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST EN 60034-18-21:2013 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 60034-18-21:2013
---------------------- Page: 2 ----------------------
SIST EN 60034-18-21:2013
EUROPEAN STANDARD
EN 60034-18-21
NORME EUROPÉENNE
March 2013
EUROPÄISCHE NORM
ICS 29.160 Supersedes EN 60034-18-21:1994 + A1:1996 + A2:1996
English version
Rotating electrical machines -
Part 18-21: Functional evaluation of insulation systems -
Test procedures for wire-wound windings -
Thermal evaluation and classification
(IEC 60034-18-21:2012)
Machines électriques tournantes - Drehende elektrische Maschinen -
Partie 18-21: Evaluation fonctionnelle Teil 18-21: Funktionelle Bewertung
des systèmes d'isolation - von Isoliersystemen -
Procédures d'essai pour enroulements Prüfverfahren für Runddrahtwicklungen -
à fils - Evaluation thermique Thermische Bewertung und
et classification Klassifizierung
(CEI 60034-18-21:2012) (IEC 60034-18-21:2012)

This European Standard was approved by CENELEC on 2012-10-24. 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60034-18-21:2013 E
---------------------- Page: 3 ----------------------
SIST EN 60034-18-21:2013
EN 60034-18-21:2013 - 2 -
Foreword

The text of document 2/1672/FDIS, future edition 2 of IEC 60034-18-21, prepared by IEC/TC 2

"Rotating machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC

as EN 60034-18-21:2013.
The following dates are fixed:
(dop) 2013-09-29
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-10-24
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60034-18-21:1994 + A1:1996 + A2:1996.

EN 60034-18-21:2013 includes the following significant technical changes with respect to

EN 60034-18-21:1994 + A1:1996 + A2:1996:

The main technical changes with regard to the previous edition can be seen in the introduction of

some basic statistical methods in the evaluation of comparative data. Moreover, the standard states a

simpler use of different test procedures.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [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 60034-18-21:2012 was approved by CENELEC as a

European Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 60034-18-21:2013
- 3 - EN 60034-18-21:2013
Annex ZA
(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 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 60034-1 - Rotating electrical machines - EN 60034-1 -
Part 1: Rating and performance
IEC 60034-18-1 2010 Rotating electrical machines - EN 60034-18-1 2010
Part 18-1: Functional evaluation of insulation
systems - General guidelines
IEC 60085 - Electrical insulation - Thermal evaluation EN 60085 -
and designation
IEC 60216-1 - Electrical insulating materials - Properties EN 60216-1 -
of thermal endurance -
Part 1: Ageing procedures and evaluation
of test results
IEC 60216-5 - Electrical insulating materials - Thermal EN 60216-5 -
endurance properties -
Part 5: Determination of relative thermal
endurance index (RTE) of an insulating
material
IEC 60455 Series Resin based reactive compounds used EN 60455 Series
for electrical insulation
IEC 60464 Series Varnishes used for electrical insulation EN 60464 Series
IEC 60505 - Evaluation and qualification of electrical EN 60505 -
insulation systems
---------------------- Page: 5 ----------------------
SIST EN 60034-18-21:2013
---------------------- Page: 6 ----------------------
SIST EN 60034-18-21:2013
IEC 60034-18-21
Edition 2.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –
Part 18-21: Functional evaluation of insulation systems – Test procedures for
wire-wound windings – Thermal evaluation and classification
Machines électriques tournantes –
Partie 18-21: Evaluation fonctionnelle des systèmes d'isolation – Procédures
d'essai pour enroulements à fils – Evaluation thermique et classification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 29.160 ISBN 978-2-83220-337-8

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 60034-18-21:2013
– 2 – 60034-18-21 © IEC:2012
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope ............................................................................................................................... 9

2 Normative references ....................................................................................................... 9

3 General considerations ..................................................................................................... 9

3.1 Reference insulation system .................................................................................... 9

3.2 Test procedures .................................................................................................... 10

4 Test objects and test specimens ..................................................................................... 10

4.1 Construction of test objects ................................................................................... 10

4.2 Verification of effects of minor changes in insulation systems ................................ 11

4.3 Number of test specimens ..................................................................................... 11

4.4 Quality control ....................................................................................................... 11

4.5 Initial diagnostic tests ............................................................................................ 11

5 Test procedures ............................................................................................................. 12

5.1 General principles of diagnostic tests .................................................................... 12

5.2 Ageing temperatures and sub-cycle lengths .......................................................... 12

5.3 Methods of heating ................................................................................................ 13

5.4 Thermal ageing sub-cycle ...................................................................................... 14

6 Diagnostic sub-cycle....................................................................................................... 14

6.1 Conditioning sequence .......................................................................................... 14

6.2 Mechanical conditioning ........................................................................................ 14

6.3 Moisture conditioning ............................................................................................ 15

6.4 Voltage tests ......................................................................................................... 15

6.5 Other diagnostic tests ............................................................................................ 15

7 Reporting and functional evaluation of data from candidate and reference systems ........ 16

7.1 General ................................................................................................................. 16

7.2 Determining qualification ....................................................................................... 16

7.2.1 Overview ................................................................................................... 16

7.2.2 Case A: Qualification for the same class temperature and same

expected service life .................................................................................. 17

7.2.3 Case B: Qualification for the same class temperature and a different

expected service life .................................................................................. 17

7.2.4 Case C: Qualification for a different class temperature and same

expected service life .................................................................................. 18

7.2.5 Case D: Qualification for a different class temperature and different

expected service life .................................................................................. 19

7.2.6 Non-linearity of regression lines ................................................................ 20

7.2.7 Reduced evaluation ................................................................................... 20

8 Procedure 1: Motorette test procedure ............................................................................ 21

8.1 General ................................................................................................................. 21

8.1.1 Test object definition ................................................................................. 21

8.1.2 Test procedure .......................................................................................... 21

8.2 Test objects ........................................................................................................... 21

8.2.1 Construction of test objects ....................................................................... 21

8.2.2 Number of test objects ............................................................................... 21

8.2.3 Quality assurance tests ............................................................................. 21

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SIST EN 60034-18-21:2013
60034-18-21 © IEC:2012 – 3 –

8.2.4 Initial diagnostic tests ................................................................................ 22

8.3 Thermal ageing sub-cycle ...................................................................................... 22

8.3.1 Ageing temperatures and sub-cycle lengths ............................................... 22

8.3.2 Means of heating ....................................................................................... 22

8.3.3 Ageing procedure ...................................................................................... 22

8.4 Diagnostic sub-cycle ............................................................................................. 22

8.4.1 General ..................................................................................................... 22

8.4.2 Mechanical conditioning ............................................................................ 22

8.4.3 Moisture conditioning ................................................................................. 22

8.4.4 Voltage test ............................................................................................... 22

8.4.5 Other diagnostic tests ................................................................................ 23

8.5 Analyzing, reporting and classification ................................................................... 23

9 Procedure 2: Motor test procedure ................................................................................. 23

9.1 General ................................................................................................................. 23

9.1.1 Test object definition ................................................................................. 23

9.1.2 Test procedure .......................................................................................... 23

9.2 Test objects ........................................................................................................... 24

9.2.1 Construction of test objects ....................................................................... 24

9.2.2 Number of test objects ............................................................................... 24

9.2.3 Quality assurance tests ............................................................................. 24

9.2.4 Initial diagnostic tests ................................................................................ 24

9.3 Thermal ageing sub-cycle ...................................................................................... 24

9.3.1 Ageing temperatures and sub-cycle lengths ............................................... 24

9.3.2 Means of heating ....................................................................................... 24

9.3.3 Ageing procedure ...................................................................................... 25

9.3.4 Mechanical stresses during the thermal ageing sub-cycle .......................... 25

9.4 Diagnostic sub-cycle ............................................................................................. 25

9.4.1 Mechanical conditioning ............................................................................ 25

9.4.2 Moisture conditioning ................................................................................. 26

9.4.3 Voltage withstand test ............................................................................... 26

9.4.4 Other diagnostic tests ................................................................................ 26

9.5 Analyzing, reporting and classification ................................................................... 27

10 Procedure 3: Test procedure for stator windings in slots ................................................. 27

10.1 General ................................................................................................................. 27

10.1.1 Test object definition ................................................................................. 27

10.1.2 Test procedures ........................................................................................ 27

10.2 Test objects ........................................................................................................... 27

10.2.1 Construction of test objects ....................................................................... 27

10.2.2 Number of test specimens ......................................................................... 27

10.2.3 Quality assurance tests ............................................................................. 27

10.2.4 Initial diagnostic tests ................................................................................ 27

10.3 Thermal ageing sub-cycle ...................................................................................... 27

10.3.1 Ageing temperatures and sub-cycle lengths ............................................... 27

10.3.2 Means of heating ....................................................................................... 28

10.3.3 Ageing procedure ...................................................................................... 28

10.4 Diagnostic sub-cycle ............................................................................................. 28

10.4.1 Mechanical conditioning ............................................................................ 28

10.4.2 Moisture conditioning ................................................................................. 28

10.4.3 Voltage withstand test ............................................................................... 28

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SIST EN 60034-18-21:2013
– 4 – 60034-18-21 © IEC:2012

10.4.4 Other diagnostic tests ................................................................................ 28

10.5 Analyzing, reporting and classification ................................................................... 28

11 Procedure 4: Test procedure for pole windings ............................................................... 29

11.1 General ................................................................................................................. 29

11.1.1 Test object definition ................................................................................. 29

11.1.2 Test procedures ........................................................................................ 29

11.2 Test objects ........................................................................................................... 29

11.2.1 Construction of test objects ....................................................................... 29

11.2.2 Number of test objects ............................................................................... 29

11.2.3 Quality assurance tests ............................................................................. 29

11.2.4 Initial diagnostic tests ................................................................................ 29

11.3 Thermal ageing sub-cycle ...................................................................................... 29

11.3.1 Ageing temperatures and sub-cycle lengths ............................................... 29

11.3.2 Means of heating ....................................................................................... 29

11.3.3 Ageing procedure ...................................................................................... 30

11.4 Diagnostic sub-cycle ............................................................................................. 30

11.4.1 Mechanical conditioning ............................................................................ 30

11.4.2 Moisture conditioning ................................................................................. 30

11.4.3 Voltage withstand test ............................................................................... 30

11.4.4 Other diagnostic tests ................................................................................ 31

11.5 Analyzing, reporting and classification ................................................................... 31

12 Procedure 5: Test procedure for rotor windings in slots .................................................. 31

12.1 General ................................................................................................................. 31

12.1.1 Test object definition ................................................................................. 31

12.1.2 Test procedures ........................................................................................ 31

12.2 Test objects ........................................................................................................... 31

12.2.1 Construction of test objects ....................................................................... 31

12.2.2 Number of test specimens ......................................................................... 32

12.2.3 Quality assurance tests ............................................................................. 32

12.2.4 Initial diagnostic tests ................................................................................ 32

12.3 Thermal ageing sub-cycle ...................................................................................... 32

12.3.1 Ageing temperatures and sub-cycle lengths ............................................... 32

12.3.2 Ageing means............................................................................................ 32

12.3.3 Ageing procedure ...................................................................................... 32

12.4 Diagnostic sub-cycle ............................................................................................. 32

12.4.1 Mechanical conditioning ............................................................................ 32

12.4.2 Moisture conditioning ................................................................................. 32

12.4.3 Voltage test ............................................................................................... 33

12.4.4 Other diagnostic tests ................................................................................ 33

12.5 Analyzing, reporting and classification ................................................................... 33

Annex A (informative) Motorette construction (examples) ..................................................... 34

Annex B (informative) Models for windings on poles (examples) .......................................... 39

Annex C (informative) Equipment for moisture tests ............................................................. 46

Figure 1 – Candidate system qualified for the same thermal class and the same

expected service life ............................................................................................................. 17

Figure 2 – Candidate system qualified for the same thermal class and different

expected service life ............................................................................................................. 18

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SIST EN 60034-18-21:2013
60034-18-21 © IEC:2012 – 5 –

Figure 3 – Candidate system qualified for a different class temperature and the same

expected service life ............................................................................................................. 19

Figure 4 – Candidate system qualified for a different service life and different thermal

class from the reference ....................................................................................................... 20

Figure A.1 – Components of motorette before final assembly ................................................ 37

Figure A.2 – Completely assembled and varnished motorette ............................................... 37

Figure A.3 – Manufacturing drawing of motorette frame ........................................................ 38

Figure B.1 – Test fixture for random wire-wound field coil ..................................................... 40

Figure B.2 – Random wire-wound field coil mounted on the test fixture ................................ 40

Figure B.3 – Manufacturing drawing for simulating pole for random wire-wound field

coil test fixture ...................................................................................................................... 41

Figure B.4 – Manufacturing drawing for simulated frame for random wire-wound field

coil test fixture ...................................................................................................................... 42

Figure B.5 – Test fixture for precision wire-wound field coil ................................................... 43

Figure B.6 – Precision wire-wound field coil mounted on the test fixture ............................... 43

Figure B.7 – Manufacturing drawing for simulated pole for precision wire-wound field

coil test fixture ...................................................................................................................... 44

Figure B.8 – Manufacturing drawing for simulated frame for precision wire-wound ................ 45

Figure C.1 – Diagram illustrating basic principle of condensation chamber with cooled

test objects ........................................................................................................................... 47

Figure C.2 – Cut away of condensation chamber with cooled test objects ............................. 48

Table 1 – Thermal classes .................................................................................................... 12

Table 2 – Recommended temperatures and ageing sub-cycle exposure periods ................... 13

Table 3 – Conditions for qualification of candidate system .................................................... 16

Table 4 – Test voltages ......................................................................................................... 23

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SIST EN 60034-18-21:2013
– 6 – 60034-18-21 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 18-21: Functional evaluation of insulation systems –
Test procedures for wire-wound windings –
Thermal evaluation and classification
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 standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes 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 participate 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 between 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 Publications 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 any

misinterpretation by any end user.
4) In
...

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