EN IEC 60034-12:2024
(Main)Rotating electrical machines - Part 12: Starting performance of single-speed three-phase cage induction motors
Rotating electrical machines - Part 12: Starting performance of single-speed three-phase cage induction motors
IEC 60034-12:2024 is available as IEC 60034-12:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60034-12:2024 specifies the parameters for eight designs of starting performance of single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034‑1 that: - have a rated voltage up to 1 000 V; - are intended for direct-on-line or star-delta starting; - are rated on the basis of duty type S1; - are constructed to any degree of protection as defined in IEC 60034-5 and explosion protection. This document also applies to dual voltage motors provided that the flux saturation level is the same for both voltages. This fourth edition cancels and replaces the third edition published in 2016. Aligned with the requirements for explosion protected motors from TC31 WG27 - new clause on methods for measuring locked-rotor current and torque; - new informative annex on the general current and torque characteristics with locked rotor; - new informative annex on correction of voltage and frequency; - aligned with the requirements for explosion protected motors from TC31 WG27.
Drehende elektrische Maschinen - Teil 12: Anlaufverhalten von Drehstrommotoren mit Käfigläufer ausgenommen polumschaltbare Motoren
Machines électriques tournantes - Partie 12: Caractéristiques de démarrage des moteurs triphasés à induction à cage à une seule vitesse
IEC 60034-12:2024 est disponible sous forme de IEC 60034-12:2024 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60034-12:2024 spécifie les paramètres de huit conceptions de caractéristiques de démarrage de moteurs triphasés à induction à cage à une seule vitesse fonctionnant à 50 Hz ou 60 Hz conformes à l'IEC 60034-1, qui: - ont des tensions assignées jusqu'à 1 000 V; - sont prévus pour démarrage direct ou étoile-triangle; - sont dimensionnés pour le service type S1; - peuvent avoir n'importe quel degré de protection tel qu'il est défini dans l'IEC 60034-5 et incluant les protections contre les explosions. Ce document s'applique également aux moteurs bitension à condition que le niveau de saturation du flux soit le même aux deux tensions. Cette quatrième édition annule et remplace la troisième édition parue en 2016. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - aligné sur les exigences du CE 31, GT 27, concernant les moteurs antidéflagrants; - nouvel article relatif aux méthodes de mesure du courant et du couple à rotor bloqué; - nouvelle annexe informative relative aux caractéristiques générales de courant et de couple à rotor bloqué; - nouvelle annexe informative relative à la correction de la tension et de la fréquence.
Električni rotacijski stroji - 12. del: Zagonska zmogljivost enohitrostnih trifaznih asinhronskih motorjev s kletko (IEC 60034-12:2024)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Električni rotacijski stroji - 12. del: Zagonska zmogljivost eno- hitrostnih trifaznih
asinhronskih motrojev s kletko (IEC 60034-12:2024)
Rotating electrical machines - Part 12: Starting performance of single-speed three-phase
cage induction motors (IEC 60034-12:2024)
Drehende elektrische Maschinen - Teil 12: Anlaufverhalten von Drehstrommotoren mit
Käfigläufer ausgenommen polumschaltbare Motoren (IEC 60034-12:2024)
Machines électriques tournantes - Partie 12: Caractéristiques de démarrage des moteurs
triphasés à induction à cage à une seule vitesse (IEC 60034-12:2024)
Ta slovenski standard je istoveten z: EN IEC 60034-12:2024
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60034-12
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2024
ICS 29.160.01 Supersedes EN 60034-12:2017
English Version
Rotating electrical machines - Part 12: Starting performance of
single-speed three-phase cage induction motors
(IEC 60034-12:2024)
Machines électriques tournantes - Partie 12: Drehende elektrische Maschinen - Teil 12: Anlaufverhalten
Caractéristiques de démarrage des moteurs triphasés à von Drehstrommotoren mit Käfigläufer ausgenommen
induction à cage à une seule vitesse polumschaltbare Motoren
(IEC 60034-12:2024) (IEC 60034-12:2024)
This European Standard was approved by CENELEC on 2024-09-25. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60034-12:2024 E
European foreword
The text of document 2/2132/CDV, future edition 4 of IEC 60034-12, prepared by TC 2 "Rotating
machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-11-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-11-30
document have to be withdrawn
This document supersedes EN 60034-12:2017 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60034-12:2024 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60034-2-1:2014 NOTE Approved as EN 60034-2-1:2014 (not modified)
Annex A
(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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-1 2022 Rotating electrical machines - Part 1: - -
Rating and performance
IEC 60034-5 2020 Rotating electrical machines - Part 5: EN IEC 60034-5 2020
Degrees of protection provided by the
integral design of rotating electrical
machines (IP code) - Classification
IEC 60034-30-1 2014 Rotating electrical machines - Part 30-1: EN 60034-30-1 2014
Efficiency classes of line operated AC
motors (IE code)
IEC 60079-7 2015 Explosive atmospheres - Part 7: EN 60079-7 2015
Equipment protection by increased safety
"e"
+ A1 2017 + A1 2018
- - + A11 2024
ISO 80000-4 2019 Quantities and units - Part 4: Mechanics EN ISO 80000-4 2019
IEC 60034-12 ®
Edition 4.0 2024-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 12: Starting performance of single-speed three-phase cage induction
motors
Machines électriques tournantes –
Partie 12: Caractéristiques de démarrage des moteurs triphasés à induction à
cage à une seule vitesse
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-8544-2
– 2 – IEC 60034-12:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols . 8
5 Designation . 9
5.1 General . 9
5.2 Design N . 9
5.3 Design NE . 9
5.4 Designs NY and NEY . 9
5.5 Design H . 9
5.6 Design HE . 9
5.7 Designs HY and HEY . 10
6 Design N requirements . 10
6.1 Torque characteristics . 10
6.2 Locked rotor current and apparent power . 10
6.3 Starting requirements . 10
7 Design NE starting requirements . 11
8 Designs NY and NEY starting requirements . 11
9 Design H requirements . 11
9.1 Starting torque . 11
9.2 Locked rotor current and apparent power . 11
9.3 Starting requirements . 11
10 Design HE starting requirements . 12
11 Designs HY and HEY starting requirements . 12
12 Determination of current and torque from measurement. 12
12.1 Locked-rotor current and locked-rotor torque . 12
12.2 Breakdown torque . 12
12.3 Torque-speed curve and current-speed curve . 13
12.3.1 General . 13
12.3.2 Torque-speed and current-speed curves from direct measurement
(method a) . 13
12.3.3 Torque-speed and current-speed curves from acceleration (method b) . 13
12.3.4 Torque-speed and current-speed curves from measured input power
(method c) . 14
12.4 Correction of data for tests performed at reduced voltage and/or other than
rated frequency . 14
Annex A (informative) Current and torque characteristics with locked rotor . 20
Annex B (informative) Correction method for test done on reduced voltage . 24
Bibliography . 25
Figure A.1 – Locked-rotor current in multiples of rated current versus time . 20
Figure A.2 – Locked-rotor torque in multiples of rated torque versus time . 21
Figure A.3 – Locked-rotor torque in cNm versus rotor position in °; left: preferable
number of rotor slots, right: less preferable number of rotor slots . 21
IEC 60034-12:2024 © IEC 2024 – 3 –
Figure A.4 – Locked-rotor torque in cNm versus rotor position in ° . 22
Figure A.5 – Time -courses (in s) of rotational speed (upper left), torque (lower left),
phase voltage (upper right) and phase current (lower right) during a star-delta start-up . 23
Table 1 – Minimum values of torques for design N . 15
Table 2 – Maximum values of locked rotor apparent power for designs N and H . 16
Table 3 – Maximum values of locked rotor apparent power for designs NE and HE . 16
Table 4 – External moment of inertia (J) . 17
Table 5 – Minimum values of torques for design H . 18
Table 6 – Minimum values of torques for design N motors with type of protection 'Ex
eb – increased safety' . 18
Table 7 – External moment of inertia (J) for motors with type of protection 'Ex eb –
increased safety' . 19
– 4 – IEC 60034-12:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 12: Starting performance of single-speed
three-phase cage induction motors
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
...
SLOVENSKI STANDARD
01-marec-2025
Električni rotacijski stroji - 12. del: Zagonska zmogljivost enohitrostnih trifaznih
asinhronskih motorjev s kletko (IEC 60034-12:2024)
Rotating electrical machines - Part 12: Starting performance of single-speed three-phase
cage induction motors (IEC 60034-12:2024)
Drehende elektrische Maschinen - Teil 12: Anlaufverhalten von Drehstrommotoren mit
Käfigläufer ausgenommen polumschaltbare Motoren (IEC 60034-12:2024)
Machines électriques tournantes - Partie 12: Caractéristiques de démarrage des moteurs
triphasés à induction à cage à une seule vitesse (IEC 60034-12:2024)
Ta slovenski standard je istoveten z: EN IEC 60034-12:2024
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60034-12
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2024
ICS 29.160.01 Supersedes EN 60034-12:2017
English Version
Rotating electrical machines - Part 12: Starting performance of
single-speed three-phase cage induction motors
(IEC 60034-12:2024)
Machines électriques tournantes - Partie 12: Drehende elektrische Maschinen - Teil 12: Anlaufverhalten
Caractéristiques de démarrage des moteurs triphasés à von Drehstrommotoren mit Käfigläufer ausgenommen
induction à cage à une seule vitesse polumschaltbare Motoren
(IEC 60034-12:2024) (IEC 60034-12:2024)
This European Standard was approved by CENELEC on 2024-09-25. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60034-12:2024 E
European foreword
The text of document 2/2132/CDV, future edition 4 of IEC 60034-12, prepared by TC 2 "Rotating
machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-11-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-11-30
document have to be withdrawn
This document supersedes EN 60034-12:2017 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60034-12:2024 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60034-2-1:2014 NOTE Approved as EN 60034-2-1:2014 (not modified)
Annex A
(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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-1 2022 Rotating electrical machines - Part 1: - -
Rating and performance
IEC 60034-5 2020 Rotating electrical machines - Part 5: EN IEC 60034-5 2020
Degrees of protection provided by the
integral design of rotating electrical
machines (IP code) - Classification
IEC 60034-30-1 2014 Rotating electrical machines - Part 30-1: EN 60034-30-1 2014
Efficiency classes of line operated AC
motors (IE code)
IEC 60079-7 2015 Explosive atmospheres - Part 7: EN 60079-7 2015
Equipment protection by increased safety
"e"
+ A1 2017 + A1 2018
- - + A11 2024
ISO 80000-4 2019 Quantities and units - Part 4: Mechanics EN ISO 80000-4 2019
IEC 60034-12 ®
Edition 4.0 2024-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 12: Starting performance of single-speed three-phase cage induction
motors
Machines électriques tournantes –
Partie 12: Caractéristiques de démarrage des moteurs triphasés à induction à
cage à une seule vitesse
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-8544-2
– 2 – IEC 60034-12:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols . 8
5 Designation . 9
5.1 General . 9
5.2 Design N . 9
5.3 Design NE . 9
5.4 Designs NY and NEY . 9
5.5 Design H . 9
5.6 Design HE . 9
5.7 Designs HY and HEY . 10
6 Design N requirements . 10
6.1 Torque characteristics . 10
6.2 Locked rotor current and apparent power . 10
6.3 Starting requirements . 10
7 Design NE starting requirements . 11
8 Designs NY and NEY starting requirements . 11
9 Design H requirements . 11
9.1 Starting torque . 11
9.2 Locked rotor current and apparent power . 11
9.3 Starting requirements . 11
10 Design HE starting requirements . 12
11 Designs HY and HEY starting requirements . 12
12 Determination of current and torque from measurement. 12
12.1 Locked-rotor current and locked-rotor torque . 12
12.2 Breakdown torque . 12
12.3 Torque-speed curve and current-speed curve . 13
12.3.1 General . 13
12.3.2 Torque-speed and current-speed curves from direct measurement
(method a) . 13
12.3.3 Torque-speed and current-speed curves from acceleration (method b) . 13
12.3.4 Torque-speed and current-speed curves from measured input power
(method c) . 14
12.4 Correction of data for tests performed at reduced voltage and/or other than
rated frequency . 14
Annex A (informative) Current and torque characteristics with locked rotor . 20
Annex B (informative) Correction method for test done on reduced voltage . 24
Bibliography . 25
Figure A.1 – Locked-rotor current in multiples of rated current versus time . 20
Figure A.2 – Locked-rotor torque in multiples of rated torque versus time . 21
Figure A.3 – Locked-rotor torque in cNm versus rotor position in °; left: preferable
number of rotor slots, right: less preferable number of rotor slots . 21
IEC 60034-12:2024 © IEC 2024 – 3 –
Figure A.4 – Locked-rotor torque in cNm versus rotor position in ° . 22
Figure A.5 – Time -courses (in s) of rotational speed (upper left), torque (lower left),
phase voltage (upper right) and phase current (lower right) during a star-delta start-up . 23
Table 1 – Minimum values of torques for design N . 15
Table 2 – Maximum values of locked rotor apparent power for designs N and H . 16
Table 3 – Maximum values of locked rotor apparent power for designs NE and HE . 16
Table 4 – External moment of inertia (J) . 17
Table 5 – Minimum values of torques for design H . 18
Table 6 – Minimum values of torques for design N motors with type of protection 'Ex
eb – increased safety' . 18
Table 7 – External moment of inertia (J) for motors with type of protection 'Ex eb –
increased safety' . 19
– 4 – IEC 60034-12:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 12: Starting performance of single-speed
three-phase cage induction motors
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 th
...
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