IEC 60034-8:2007

Rotating electrical machines - Part 8: Terminal markings and direction of rotation

Applies to a.c. and d.c. machines and specifies rules for the identification of winding connection points; marking of winding terminals; direction of rotation; relationship between terminal markings and direction of rotation; terminal marking of auxiliary devices; connection diagrams of machines for common applications. The main change with respect to the previous edition consists of changed terminal markings for d.c. machines.

Machines électriques tournantes - Partie 8: Marques d'extrémité et sens de rotation

S'applique aux machines à courant continu et à courant alternatif et spécifie les règles d'identification des points de couplage; le marquage des bornes d'enroulement; le sens de rotation; la relation entre les marques d'extrémité et le sens de rotation; les marques d'extrémité des appareils auxiliaires; les schémas de connexion des machines pour applications communes. La modification principale par rapport à l'édition précédente consiste du marquage des extrémités modifié pour les machines à courant continu.

General Information

• Status: Published
• Publication Date: 19-Mar-2014
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: TC 2 - Rotating machinery
• Drafting Committee: MT 3 - TC 2/MT 3
• Current Stage: PPUB - Publication issued
• Start Date: 15-Aug-2007
• Completion Date: 22-Jun-2007

Relations

• Amended By: IEC 60034-8:2007/AMD1:2014 - Amendment 1 - Rotating electrical machines - Part 8: Terminal markings and direction of rotation
• Effective Date: 05-Sep-2023
• Revises: IEC 60034-8:2002 - Rotating electrical machines - Part 8: Terminal markings and direction of rotation
• Effective Date: 05-Sep-2023
• Revises: IEC 60034-8:2002/COR1:2004 - Corrigendum 1 - Rotating electrical machines - Part 8: Terminal markings and direction of rotation
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
CEI
60034-8
NORME
Third edition
INTERNATIONALE
Troisième édition
2007-06
Rotating electrical machines –
Part 8:
Terminal markings and direction of rotation

Machines électriques tournantes –
Partie 8:
Marques d’extrémité et sens de rotation
Reference number
Numéro de référence
IEC/CEI 60034-8:2007
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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INTERNATIONAL IEC
STANDARD
CEI
60034-8
NORME
Third edition
INTERNATIONALE
Troisième édition
2007-06
Rotating electrical machines –
Part 8:
Terminal markings and direction of rotation

Machines électriques tournantes –
Partie 8:
Marques d’extrémité et sens de rotation
PRICE CODE
V
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 60034-8 © IEC:2007
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
2 Normative references.8
3 Terms and definitions .8
4 Symbols.10
4.1 General.10
4.2 DC and single-phase commutator machines .10
4.3 AC machines without commutators.10
4.4 Auxiliary devices .11
5 Direction of rotation.11
6 Rules for terminal markings .11
6.1 General.11
6.2 Suffixes.12
6.3 Prefixes.13
6.4 Winding identification for categories of machines .13
6.5 Synchronous machines.14
6.6 DC machines.14
6.7 Relation between terminal markings and direction of rotation .14
6.8 Terminal marking figures .15
7 Auxiliary terminal marking rules.20
7.1 General.20
7.2 Marking.20

Annex A (normative) Connection diagrams for common applications.23

Figure 1 – Single three-phase winding, three elements, open connection, six terminals .15
Figure 2 – Single three-phase winding, delta connection, three terminals .16
Figure 3 – Single three-phase winding, internal star connection with neutral conductor,
four terminals.16
Figure 4 – Single three-phase winding, two elements per phase, open connection,
twelve terminals.16
Figure 5 – Single three-phase winding, four elements per phase, open connection,
twenty-four terminals .16
Figure 6 – Single three-phase winding, two elements per phase with four tapping
points per element, open connection, thirty-six terminals .17
Figure 7 – Two separate three-phase windings with two independent functions, two
elements per phase, open connection, twenty-four terminals .17
Figure 8 – Two elements, internal connection, three terminals .17
Figure 9 – Single three-phase winding, star connection, duplicate terminals for
alternate connection, six terminals.
Figure 10 – Single three-phase winding, star connection, parallel terminals for shared
current, six terminals .18

60034-8 © IEC:2007 – 3 –
Figure 11 – Three-phase wound-rotor, star connections with neutral conductors, eight
terminals.18
Figure 12 – Main and auxiliary winding, two elements.18
Figure 13 – Single-phase auxiliary winding, integrally connected capacitor, one
element .18
Figure 14 – Single-phase main winding, integrally connected thermal protector, one
element .18
Figure 15 – Six-phase winding, open connection, six elements .18
Figure 16 – Armature winding, one element .19
Figure 17 – Commutating winding, one and two elements .19
Figure 18 – Compensating winding, one and two elements .19
Figure 19 – Series winding, one element, two tappings.19
Figure 20 – Shunt excitation winding, one element .19
Figure 21 – Separately excited excitation winding, one and two elements.19
Figure 22 – Direct-axis auxiliary winding, one element.19
Figure 23 – Quadrature-axis auxiliary winding, one element .19
Figure 24 – Armature winding with commutating and compensating windings, one
element .19
Figure 25 – Single-phase, single voltage .20
Figure 26 – Single-phase, dual voltage .20
Figure 27 – Three-phase, single voltage .21
Figure 28 – Three-phase, dual voltage.21
Figure 29 – Two-lead devices (except type R) .21
Figure 30 – Two-lead devices of type R .21
Figure 31 – Three-lead devices of type R.22
Figure 32 – Four-lead devices of type R .22
Figure 33 – Switch connections .22
Figure A.1 – Delta connection.23
Figure A.2 – Star connection – with or without neutral .23
Figure A.3 – Dual voltage, six terminals (1:√3).23
Figure A.4 – Star-connected, dual voltage, nine terminals (1:2) .24
Figure A.5 – Delta-connected, dual voltage, nine terminals (1:2).24
Figure A.6 – Star-delta, single voltage, six terminals.24
Figure A.7 – Star-delta, dual voltage, twelve terminals (1:2) .25
Figure A.8 – Part-winding, single voltage, six terminals .25
Figure A.9 – Part-winding, dual voltage, nine terminals (1:2).26
Figure A.10 – Variable-torque, six terminals .26
Figure A.11 – Variable-torque, dual-voltage (1:√3), nine terminals .27
Figure A.12 – Constant-torque, six terminals .28
Figure A.13 – Constant power, six terminals .28
Figure A.14 – Variable-torque, six terminals .29
Figure A.15 – Constant-torque, seven terminals.29
Figure A.16 – Constant-power, seven terminals .29

– 4 – 60034-8 © IEC:2007
Figure A.17 – Example of three-speed, constant torque motor using two separate
windings, ten terminals .
...

IEC 60034-8 ®
Edition 3.1 2014-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –
Part 8: Terminal markings and direction of rotation

Machines électriques tournantes –
Partie 8: Marques d’extrémité et sens de rotation

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 les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.

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IEC 60034-8 ®
Edition 3.1 2014-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –

Part 8: Terminal markings and direction of rotation

Machines électriques tournantes –

Partie 8: Marques d’extrémité et sens de rotation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160 ISBN 978-2-8322-1492-3

IEC 60034-8 ®
Edition 3.1 2014-03
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Rotating electrical machines –
Part 8: Terminal markings and direction of rotation

Machines électriques tournantes –
Partie 8: Marques d’extrémité et sens de rotation

– 2 – IEC 60034-8:2007
+AMD1:2014 CSV  IEC 2014
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Symbols . 10
4.1 General . 10
4.2 DC and single-phase commutator machines . 10
4.3 AC machines without commutators . 10
4.4 Auxiliary devices . 11
5 Direction of rotation . 11
6 Rules for terminal markings . 11
6.1 General . 11
6.2 Suffixes . 12
6.3 Prefixes . 13
6.4 Winding identification for categories of machines . 13
6.5 Synchronous machines . 14
6.6 DC machines . 14
6.7 Relation between terminal markings and direction of rotation . 14
6.8 Terminal marking figures . 15
7 Auxiliary terminal marking rules . 20
7.1 General . 20
7.2 Marking . 20

Annex A (normative) Connection diagrams for common applications . 23

Figure 1 – Single three-phase winding, three elements, open connection, six terminals . 15
Figure 2 – Single three-phase winding, delta connection, three terminals . 16
Figure 3 – Single three-phase winding, internal star connection with neutral conductor,
four terminals . 16
Figure 4 – Single three-phase winding, two elements per phase, open connection,
twelve terminals . 16
Figure 5 – Single three-phase winding, four elements per phase, open connection,
twenty-four terminals . 16
Figure 6 – Single three-phase winding, two elements per phase with four tapping
points per element, open connection, thirty-six terminals . 17
Figure 7 – Two separate three-phase windings with two independent functions, two
elements per phase, open connection, twenty-four terminals . 17
Figure 8 – Two elements, internal connection, three terminals . 17
Figure 9 – Single three-phase winding, star connection, duplicate terminals for
alternate connection, six terminals . 17
Figure 10 – Single three-phase winding, star connection, parallel terminals for shared
current, six terminals . 18

+AMD1:2014 CSV  IEC 2014
Figure 11 – Three-phase wound-rotor, star connections with neutral conductors, eight
terminals . 18
Figure 12 – Main and auxiliary winding, two elements . 18
Figure 13 – Single-phase auxiliary winding, integrally connected capacitor, one
element . 18
Figure 14 – Single-phase main winding, integrally connected thermal protector, one
element . 18
Figure 15 – Six-phase winding, open connection, six elements . 18
Figure 16 – Armature winding, one element . 19
Figure 17 – Commutating winding, one and two elements . 19
Figure 18 – Compensating winding, one and two elements . 19
Figure 19 – Series winding, one element, two tappings . 19
Figure 20 – Shunt excitation winding, one element . 19
Figure 21 – Separately excited excitation winding, one and two elements . 19
Figure 22 – Direct-axis auxiliary winding, one element . 19
Figure 23 – Quadrature-axis auxiliary winding, one element . 19
Figure 24 – Armature winding with commutating and compensating windings, one
element . 19
Figure 25 – Single-phase, single voltage . 20
Figure 26 – Single-phase, dual voltage . 20
Figure 27 – Three-phase, single voltage . 21
Figure 28 – Three-phase, dual voltage . 21
Figure 29 – Two-lead devices (except type R) . 21
Figure 30 – Two-lead devices of type R . 21
Figure 31 – Th
...