Rotating electrical machines - Part 23: Repair, overhaul and reclamation (IEC 60034-23:2019)

This part of IEC 60034 covers the procedures necessary to ensure the satisfactory repair, overhaul, and reclamation of all types and sizes of rotating electrical machines covered by the IEC 60034 series. The standard creates a generic industry procedure covering common aspects of a complete repair. The scope of work depends on the machine type, rating, condition, and the importance of plant reliability and safety. It includes - determining cause of failure, where necessary; - determining the extent of repair, as applicable; - defining revised performance, operating and ambient conditions, if required; - reviewing the original design, and upgrading the specification of the design, if required; - proving the quality and performance of the repaired machine, maintaining or improving the rated energy efficiency; - ensuring environmental considerations are taken into account. This document does not supersede the requirements prescribed in IEC 60079-19 or elsewhere concerning the repair and overhaul for machines used in explosive atmospheres. Machines for special applications such as hermetic, submersible, nuclear, hydrogen cooled machines, military, aviation and traction motors might have additional requirements, which are the subject of agreement between the service facility and user. This document is not intended to take the place of the original machine manufacturer’s instructions and recommendations. Re-designs and performance changes requiring machine designer input are beyond the scope of this document.

Drehende elektrische Maschinen - Teil 23: Reparatur, Überholung und Sanierung (IEC 60034-23:2019)

Machines électriques tournantes - Partie 23: Réparation, révision et remise en état (IEC 60034-23:2019)

La présente partie de l'IEC 60034 couvre les procédures nécessaires pour assurer la réparation, la révision et la remise en état de tous types et tailles de machines électriques tournantes couvertes par la série IEC 60034. La norme crée une procédure industrielle générique qui couvre les aspects courants d'une réparation complète. L’étendue du travail dépend du type de machine, de ses caractéristiques assignées, de son état, ainsi que de l’importance de la fiabilité et de la sécurité de l’installation. Elle comprend - la détermination de la cause de défaillance, si nécessaire; - la détermination de l'étendue de la réparation, le cas échéant; - la définition des caractéristiques de fonctionnement révisées, les conditions de fonctionnement et les conditions ambiantes, si elles sont exigées; - l’examen de la conception originale et l’amélioration de la spécification de la conception, si cela est exigé; - la mise en évidence de la qualité et des caractéristiques de fonctionnement de la machine réparée; maintien ou amélioration du rendement énergétique assigné - l’assurance de la prise en compte des considérations liées à l’environnement Cette norme ne remplace pas les exigences spécifiées dans l’IEC 60079-19 ou dans tout autre document concernant la réparation et la révision des machines utilisées dans des atmosphères explosives. Les machines pour applications spéciales, telles que les applications hermétiques, submersibles, nucléaires, avec machines à refroidissement par hydrogène, militaires, aéronautiques et avec moteurs à traction peuvent avoir des exigences supplémentaires pour lesquelles un accord est conclu entre l’atelier de service et l'utilisateur. La norme technique n’est pas destinée à se substituer aux instructions et aux recommandations du constructeur de la machine d'origine. Les nouvelles conceptions et les modifications des caractéristiques de fonctionnement exigeant la communication de données du concepteur de la machine ne relèvent pas du domaine d’application de la présente spécification.

Električni rotacijski stroji - 23. del: Popravilo, obnova in remont opreme (IEC 60034-23:2019)

General Information

Status
Published
Publication Date
08-May-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Mar-2019
Due Date
31-May-2019
Completion Date
09-May-2019

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SLOVENSKI STANDARD
SIST EN IEC 60034-23:2019
01-junij-2019

Električni rotacijski stroji - 23. del: Popravilo, obnova in remont opreme (IEC 60034

-23:2019)

Rotating electrical machines - Part 23: Repair, overhaul and reclamation (IEC 60034-

23:2019)

Drehende elektrische Maschinen - Teil 23: Reparatur, Überholung und Sanierung (IEC

60034-23:2019)

Machines électriques tournantes - Partie 23: Réparation, révision et remise en état (IEC

60034-23:2019)
Ta slovenski standard je istoveten z: EN IEC 60034-23:2019
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST EN IEC 60034-23:2019 en,fr,de

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

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SIST EN IEC 60034-23:2019
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SIST EN IEC 60034-23:2019
EUROPEAN STANDARD EN IEC 60034-23
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 29.160.01
English Version
Rotating electrical machines - Part 23: Repair, overhaul and
reclamation
(IEC 60034-23:2019)

Machines électriques tournantes - Partie 23: Réparation, Drehende elektrische Maschinen - Teil 23: Reparatur,

révision et remise en état Überholung und Sanierung
(IEC 60034-23:2019) (IEC 60034-23:2019)

This European Standard was approved by CENELEC on 2019-02-28. 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

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60034-23:2019 E
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SIST EN IEC 60034-23:2019
EN IEC 60034-23:2019 (E)
European foreword

The text of document 2/1923/FDIS, future edition 1 of IEC 60034-23, prepared by IEC/TC 2 "Rotating

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

EN IEC 60034-23:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-11-28

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-02-28

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 60034-23:2019 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60034-2-1 NOTE Harmonized as EN 60034-2-1
IEC 60034-2-2 NOTE Harmonized as EN 60034-2-2
IEC 60034-3 NOTE Harmonized as EN 60034-3
IEC 60034-4-1 NOTE Harmonized as EN IEC 60034-4-1
IEC 60034-5 NOTE Harmonized as EN 60034-5
IEC 60034-7 NOTE Harmonized as EN 60034-7
IEC 60034-8 NOTE Harmonized as EN 60034-8
IEC 60034-9 NOTE Harmonized as EN 60034-9
IEC 60034-12 NOTE Harmonized as EN 60034-12
IEC 60034-14 NOTE Harmonized as EN IEC 60034-14
IEC 60034-15 NOTE Harmonized as EN 60034-15
IEC 60034-16-1 NOTE Harmonized as EN 60034-16-1
IEC 60034-18-1 NOTE Harmonized as EN 60034-18-1
IEC 60034-18-21 NOTE Harmonized as EN 60034-18-21
IEC 60034-18-22 NOTE Harmonized as EN 60034-18-22
IEC 60034-18-31 NOTE Harmonized as EN 60034-18-31
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SIST EN IEC 60034-23:2019
EN IEC 60034-23:2019 (E)
IEC 60034-18-32 NOTE Harmonized as EN 60034-18-32
IEC 60034-18-34 NOTE Harmonized as EN 60034-18-34
IEC 60034-18-41 NOTE Harmonized as EN 60034-18-41
IEC 60034-18-42 NOTE Harmonized as EN 60034-18-42
IEC 60034-19 NOTE Harmonized as EN 60034-19
IEC 60034-27-1 NOTE Harmonized as EN IEC 60034-27-1
IEC 60034-27-3 NOTE Harmonized as EN 60034-27-3
IEC 60034-27-4 NOTE Harmonized as EN IEC 60034-27-4
IEC 60349-1 NOTE Harmonized as EN 60349-1
ISO 4287 NOTE Harmonized as EN ISO 4287
ISO 4526 NOTE Harmonized as EN ISO 4526
ISO 6158 NOTE Harmonized as EN ISO 6158
ISO 9001 NOTE Harmonized as EN ISO 9001
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SIST EN IEC 60034-23:2019
EN IEC 60034-23:2019 (E)
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 Where 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 60034 series R otating electrical machines EN IEC 60034 series
IEC 60034-1 - Rotating electrical machines - Part 1: Rating - -
and performance
IEC 60034-6 - Rotating electrical machines - Part 6: Methods EN 60034-6 -
of cooling (IC Code)
IEC 60034-11 - Rotating electrical machines - Part 11: Thermal EN 60034-11 -
protection
IEC 60034-30-1 - Rotating electrical machines - Part 30-1: EN 60034-30-1 -
Efficiency classes of line operated AC motors
(IE code)
IEC/TS 60034-30-2 - Rotating electrical machines - Part 30-2: - -
Efficiency classes of variable speed AC motors
(IE-code)
IEC 60050-411 1996 International Electrotechnical Vocabulary - - -
Chapter 411: Rotating machinery
IEC 60060-1 - High-voltage test techniques - Part 1: General EN 60060-1 -
definitions and test requirements
IEC 60072-2 - Dimensions and output series for rotating - -
electrical machines - Part 2: Frame numbers
355 to 1000 and flange numbers 1180 to 2360
IEC 60079-19 - Explosive atmospheres - Part 19: Equipment EN 60079-19 -
repair, overhaul and reclamation
IEC 60136 1986 Dimensions of brushes and brush-holders for - -
electrical machinery
ISO 21940-11 - Mechanical vibration - Rotor balancing - Part - -
11: Procedures and tolerances for rotors with
rigid behaviour
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SIST EN IEC 60034-23:2019
IEC 60034-23
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 23: Repair, overhaul and reclamation
Machines électriques tournantes –
Partie 23: Réparation, révision et remise en état
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-6264-1

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
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SIST EN IEC 60034-23:2019
– 2 – IEC 60034-23:2019 © IEC 2019
CONTENTS

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

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 9

4 General principles ......................................................................................................... 10

4.1 Use of referenced documents ............................................................................... 10

4.2 Hazardous areas ................................................................................................... 10

4.3 Special applications .............................................................................................. 11

4.4 Efficiency .............................................................................................................. 11

4.5 System efficiencies ............................................................................................... 11

4.6 Environment and End of life recycling ................................................................... 11

4.7 Circular economy .................................................................................................. 12

5 General requirements for repair ..................................................................................... 12

5.1 General ................................................................................................................. 12

5.2 Service facility ...................................................................................................... 13

5.3 Scope of work ....................................................................................................... 13

5.4 Standards ............................................................................................................. 14

5.5 Quality program .................................................................................................... 14

5.6 User supplied information ..................................................................................... 15

5.6.1 User transfer document ................................................................................. 15

5.6.2 Operating environment .................................................................................. 15

5.6.3 Converter/inverter operation .......................................................................... 15

5.6.4 Health and safety........................................................................................... 15

5.7 Documentation ...................................................................................................... 15

5.7.1 Records ......................................................................................................... 15

5.7.2 Labels and rating plates................................................................................. 16

6 Assembled machine: inspection, tests and evaluation .................................................... 16

6.1 Visual inspection ................................................................................................... 16

6.2 Tests before dismantling ....................................................................................... 17

6.2.1 Safety ............................................................................................................ 17

6.2.2 Application ..................................................................................................... 17

6.3 Stator winding or rotor winding tests ..................................................................... 17

6.3.1 Winding resistance test .................................................................................. 17

6.3.2 Phase balance test ........................................................................................ 17

6.3.3 Insulation resistance test ............................................................................... 17

6.3.4 Polarization index test ................................................................................... 18

6.3.5 No load test ................................................................................................... 19

6.4 Shaft and bearings ................................................................................................ 19

6.4.1 Shaft checks .................................................................................................. 19

6.4.2 Bearing checks .............................................................................................. 19

6.4.3 Bearing insulation resistance ......................................................................... 19

6.5 Rotor cage integrity ............................................................................................... 20

6.5.1 General ......................................................................................................... 20

6.5.2 Current signature analysis (harmonic analysis) .............................................. 20

6.5.3 Single-phase test method .............................................................................. 20

6.5.4 Pole drop test – Salient pole rotor (motor or generator) ................................. 20

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SIST EN IEC 60034-23:2019
IEC 60034-23:2019 © IEC 2019 – 3 –

7 Dismantled machine: inspection, tests, and evaluation .................................................. 20

7.1 General ................................................................................................................. 20

7.2 Cleaning ............................................................................................................... 20

7.3 Visual inspection ................................................................................................... 21

7.4 Air gap .................................................................................................................. 21

7.5 Ventilation............................................................................................................. 21

7.6 Stator .................................................................................................................... 21

7.7 Rotor .................................................................................................................... 22

7.7.1 General ......................................................................................................... 22

7.7.2 Rotor removal: vertical machines ................................................................... 22

7.7.3 Cage rotor ..................................................................................................... 22

7.7.4 Cylindrical wound rotor windings .................................................................... 23

7.7.5 Permanent magnet (PM) machines: rotor removal ......................................... 23

7.7.6 Salient pole rotor ........................................................................................... 23

7.7.7 Cylindrical solid rotors ................................................................................... 23

7.8 Slip rings .............................................................................................................. 24

7.9 Brushes and brush-holders ................................................................................... 24

7.10 Rolling element bearings ....................................................................................... 24

7.11 Sleeve bearings .................................................................................................... 25

7.12 Seals and labyrinth seals ...................................................................................... 25

8 Repair work ................................................................................................................... 25

8.1 Winding inspection ................................................................................................ 25

8.2 Core inspection ..................................................................................................... 26

8.3 Rewinding ............................................................................................................. 26

8.3.1 General ......................................................................................................... 26

8.3.2 Random wound coils ...................................................................................... 27

8.3.3 Form-wound coils .......................................................................................... 27

8.3.4 Rewound stator tests ..................................................................................... 28

8.3.5 Winding resistance test .................................................................................. 28

8.3.6 Surge comparison (or phase balance) test ..................................................... 28

8.3.7 Withstand voltage test ................................................................................... 28

8.3.8 Thermal protection ......................................................................................... 30

8.3.9 Conductors and connections .......................................................................... 30

8.3.10 Insulation system ........................................................................................... 30

8.3.11 Impregnation ................................................................................................. 30

8.3.12 Wound rotor banding ..................................................................................... 31

8.4 Components ......................................................................................................... 31

8.4.1 General ......................................................................................................... 31

8.4.2 Housing and end brackets ............................................................................. 31

8.4.3 Fans and fan cowls ........................................................................................ 32

8.5 Rotor .................................................................................................................... 32

8.5.1 General ......................................................................................................... 32

8.5.2 Air gap ........................................................................................................... 32

8.5.3 Cage rotor ..................................................................................................... 32

8.5.4 Salient pole rotor ........................................................................................... 33

8.5.5 Slip-rings ....................................................................................................... 33

8.5.6 Capacitors ..................................................................................................... 33

8.5.7 Switches and starting components ................................................................. 33

8.5.8 Excitation components ................................................................................... 33

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SIST EN IEC 60034-23:2019
– 4 – IEC 60034-23:2019 © IEC 2019

8.6 Shafts ................................................................................................................... 33

8.7 Bearings ............................................................................................................... 34

8.8 Lubrication ............................................................................................................ 34

8.8.1 Grease .......................................................................................................... 34

8.8.2 Oil ................................................................................................................. 35

8.9 Space heaters ....................................................................................................... 35

8.10 Temperature sensors ............................................................................................ 35

8.11 Ingress and corrosion protection ........................................................................... 35

8.12 Terminal boxes and connections ........................................................................... 35

9 Final tests ...................................................................................................................... 35

9.1 Test equipment ..................................................................................................... 35

9.2 Insulation resistance ............................................................................................. 36

9.3 Winding resistance................................................................................................ 36

9.4 No load test .......................................................................................................... 36

9.5 Magnetic centre marking (by agreement) .............................................................. 37

9.6 Locked rotor test (where applicable) ..................................................................... 37

9.7 Full load run for motors ......................................................................................... 37

9.8 Zero power factor full current heat run (by agreement) .......................................... 37

9.9 Electromagnetic compatibility (by agreement) ....................................................... 37

9.10 Auxiliaries ............................................................................................................. 37

9.11 Salient pole DC or AC drop test ............................................................................ 37

10 Additional requirements for DC machines ...................................................................... 37

10.1 General ................................................................................................................. 37

10.2 Assembled DC machine: inspection, tests and evaluation ..................................... 37

10.2.1 General ......................................................................................................... 37

10.2.2 No load test, or light load run ......................................................................... 38

10.2.3 Bar to bar test ................................................................................................ 38

10.2.4 Surge test ...................................................................................................... 38

10.3 Dismantled condition: inspection, tests and evaluation .......................................... 38

10.3.1 Field winding ................................................................................................. 38

10.3.2 Inter-pole and compensation winding ............................................................. 38

10.3.3 Armature winding ........................................................................................... 38

10.3.4 Commutator ................................................................................................... 39

10.4 Repair work .......................................................................................................... 39

10.4.1 Commutator dimensions ................................................................................ 39

10.4.2 Brush-holders ................................................................................................ 39

10.4.3 Brushes ......................................................................................................... 40

10.4.4 Brush neutral ................................................................................................. 40

10.4.5 Field, inter-pole, and compensation windings ................................................. 41

10.4.6 Air gap ........................................................................................................... 41

10.4.7 Rotor run-outs ............................................................................................... 41

10.4.8 Rotor balance ................................................................................................ 41

10.5 DC machines final tests ........................................................................................ 42

10.5.1 Brush holders ................................................................................................ 42

10.5.2 No load test or light load test ......................................................................... 42

11 Additional requirements for high voltage AC machines (by agreement) .......................... 42

11.1 Assembled HV machine, inspection and tests ....................................................... 42

11.1.1 General ......................................................................................................... 42

11.1.2 The tan-delta (tip-up test in North America) ................................................... 42

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SIST EN IEC 60034-23:2019
IEC 60034-23:2019 © IEC 2019 – 5 –

11.1.3 Partial discharge test ..................................................................................... 42

11.2 Dismantled HV machine , inspection and tests ...................................................... 42

11.2.1 Dielectric dissipation factor test ..................................................................... 42

11.2.2 Dielectric dissipation factor tests of stator winding coils and bars .................. 42

11.2.3 Stator slot wedge deterioration ...................................................................... 42

11.2.4 Stator winding slot and overhangs discharge suppression ............................. 42

11.3 High voltage machines: final tests ......................................................................... 43

11.3.1 High voltage withstand test: for HV machines ................................................ 43

11.3.2 Withstand voltage tests, for overhauls and partial rewinds (by

agreement) .................................................................................................... 43

11.3.3 Over-speed test (by agreement) .................................................................... 43

11.3.4 Short circuit run (by agreement) .................................................................... 43

11.3.5 Remnant voltage (by agreement) ................................................................... 43

11.3.6 Cooling circuit leakage tests (by agreement) ................................................. 43

12 Additional tests for high voltage generators ................................................................... 44

12.1 Stator winding crevice corrosion ........................................................................... 44

12.2 Solid cylindrical rotor ............................................................................................ 44

12.3 Cooling circuits (hydrogen/water) .......................................................................... 44

13 Customer reports and handover ..................................................................................... 44

13.1 Exterior finish ........................................................................................................ 44

13.2 Transport and packaging ...................................................................................... 44

13.3 Report to the user ................................................................................................. 44

Annex A (informative) Flow chart for repair, overhaul and reclamation ................................. 45

Annex B (informative) Standard extracts and tolerance tables.............................................. 46

Bibliography .......................................................................................................................... 49

Figure 1 – Electrical machine components ............................................................................ 13

Table 1 – Recommended minimum insulation resistance values at a base temperature

of 40 °C reference IEC 60034-27-4 ....................................................................................... 18

Table 2 – Guide to application of DC voltages for the insulation resistance and PI test ......... 19

Table 3 – Withstand voltage tests as per IEC 60034-1 .......................................................... 28

Table 4 – Minimum schedule of routine
...

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