SIST IEC 60034-1:2019

IEC 60034-1
®

Edition 13.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Rotating electrical machines –
Part 1: Rating and performance

Machines électriques tournantes –
Partie 1: Caractéristiques assignées et caractéristiques de fonctionnement

IEC 60034-1:2017-05(en-fr)

---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60034-1

®


Edition 13.0 2017-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Rotating electrical machines –

Part 1: Rating and performance




Machines électriques tournantes –

Partie 1: Caractéristiques assignées et caractéristiques de fonctionnement
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.160.01 ISBN 978-2-8322-4210-0



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: 3 ----------------------
– 2 – IEC 60034-1:2017  IEC 2017
CONTENTS
FOREWORD . 6
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Duty . 15
4.1 Declaration of duty . 15
4.2 Duty types . 16
4.2.1 Duty type S1 – Continuous running duty . 16
4.2.2 Duty type S2 – Short-time duty . 17
4.2.3 Duty type S3 – Intermittent periodic duty . 17
4.2.4 Duty type S4 – Intermittent periodic duty with starting . 18
4.2.5 Duty type S5 – Intermittent periodic duty with electric braking. 20
4.2.6 Duty type S6 – Continuous operation periodic duty . 21
4.2.7 Duty type S7 – Continuous operation periodic duty with electric braking . 22
4.2.8 Duty type S8 – Continuous operation periodic duty with related
load/speed changes . 22
4.2.9 Duty type S9 – Duty with non-periodic load and speed variations . 24
4.2.10 Duty type S10 – Duty with discrete constant loads and speeds . 24
5 Rating. 26
5.1 Assignment of rating . 26
5.2 Classes of rating . 26
5.2.1 Rating for continuous running duty . 26
5.2.2 Rating for short-time duty . 26
5.2.3 Rating for periodic duty . 26
5.2.4 Rating for non-periodic duty . 27
5.2.5 Rating for duty with discrete constant loads and speeds . 27
5.2.6 Rating for equivalent loading . 27
5.3 Selection of a class of rating . 27
5.4 Allocation of outputs to class of rating . 28
5.5 Rated output . 28
5.5.1 DC generators . 28
5.5.2 AC generators . 28
5.5.3 Motors . 28
5.5.4 Synchronous condensers . 28
5.6 Rated voltage . 28
5.6.1 DC generators . 28
5.6.2 AC generators . 29
5.7 Co-ordination of voltages and outputs . 29
5.8 Machines with more than one rating . 29
6 Site conditions . 29
6.1 General . 29
6.2 Altitude . 29
6.3 Maximum ambient air temperature . 29
6.4 Minimum ambient air temperature . 30
6.5 Water coolant temperature . 30
6.6 Standstill, storage and transport . 30

---------------------- Page: 4 ----------------------
IEC 60034-1:2017  IEC 2017 – 3 –
6.7 Purity of hydrogen coolant . 30
7 Electrical operating conditions . 30
7.1 Electrical supply . 30
7.2 Form and symmetry of voltages and currents . 31
7.2.1 AC motors . 31
7.2.2 AC generators . 32
7.2.3 Synchronous machines . 32
7.2.4 DC motors supplied from static power converters . 33
7.3 Voltage and frequency variations during operation . 34
7.4 Three-phase a.c. machines operating on unearthed systems . 36
7.5 Voltage (peak and gradient) withstand levels . 36
8 Thermal performance and tests . 37
8.1 Thermal class . 37
8.2 Reference coolant . 37
8.3 Conditions for thermal tests . 38
8.3.1 Electrical supply . 38
8.3.2 Temperature of machine before test . 38
8.3.3 Temperature of coolant . 38
8.3.4 Measurement of coolant temperature during test . 38
8.4 Temperature rise of a part of a machine . 39
8.5 Methods of measurement of temperature . 39
8.5.1 General . 39
8.5.2 Resistance method . 39
8.5.3 Embedded temperature detector (ETD) method . 39
8.5.4 Thermometer method. 39
8.6 Determination of winding temperature . 39
8.6.1 Choice of method . 39
8.6.2 Determination by resistance method . 40
8.6.3 Determination by ETD method . 42
8.6.4 Determination by thermometer method . 42
8.7 Duration of thermal tests . 43
8.7.1 Rating for continuous running duty . 43
8.7.2 Rating for short-time duty . 43
8.7.3 Rating for periodic duty . 43
8.7.4 Ratings for non-periodic duty and for duty with discrete constant loads . 43
8.8 Determination of the thermal equivalent time constant for machines of duty
type S9 . 43
8.9 Measurement of bearing temperature . 43
8.10 Limits of temperature and of temperature rise . 44
8.10.1 General . 44
8.10.2 Indirect cooled windings . 44
8.10.3 Direct cooled windings . 49
8.10.4 Adjustments to take account of hydrogen purity on test . 50
8.10.5 Permanently short-circuited windings, magnetic cores and all structural
components (other than bearings) whether or not in contact with
insulation . 50
8.10.6 Commutators and sliprings, open or enclosed and their brushes and
brushgear . 50
9 Other performance and tests . 52

---------------------- Page: 5 ----------------------
– 4 – IEC 60034-1:2017  IEC 2017
9.1 Routine tests. 52
9.2 Withstand voltage test . 53
9.3 Occasional excess current . 55
9.3.1 General . 55
9.3.2 Generators . 56
9.3.3 Motors (except commutator motors and permanent magnet motors) . 56
9.3.4 Commutator machines . 56
9.4 Momentary excess torque for motors . 56
9.4.1 Polyphase induction motors and d.c. motors . 56
9.4.2 Polyphase synchronous motors . 57
9.4.3 Other motors . 57
9.5 Pull-up torque . 57
9.6 Safe operating speed of cage induction motors . 57
9.7 Overspeed . 58
9.8 Short-circuit current for synchronous machines . 59
9.9 Short-circuit withstand test for synchronous machines . 59
9.10 Commutation test for commutator machines . 60
9.11 Total harmonic distortion (THD) for synchronous machines . 60
9.11.1 General . 60
9.11.2 Limits . 60
9.11.3 Tests . 60
10 Rating plates . 60
10.1 General . 60
10.2 Marking . 61
11 Miscellaneous requirements . 62
11.1 Protective earthing of machines . 62
11.2 Shaft-end key(s) . 64
12 Tolerances . 64
12.1 General . 64
12.2 Tolerances on values of quantities . 64
13 Electromagnetic compatibility (EMC) . 66
13.1 General . 66
13.2 Immunity . 66
13.2.1 Machines not incorporating electronic circuits . 66
13.2.2 Machines incorporating electronic circuits . 67
13.3 Emission . 67
13.4 Immunity tests . 67
13.5 Emission measurements . 67
14 Safety . 67
Annex A (informative) Guidance for the application of duty type S10 and for
establishing the value of relative thermal life expectancy TL . 69
Annex B (informative) Electromagnetic compatibility (EMC) limits . 70
Bibliography . 71

Figure 1 – Continuous running duty – Duty type S1 . 16
Figure 2 – Short-time duty – Duty type S2 . 17
Figure 3 – Intermittent periodic duty – Duty type S3 . 18
Figure 4 – Intermittent periodic duty with starting – Duty type S4 . 19

---------------------- Page: 6 ----------------------
IEC 60034-1:2017  IEC 2017 – 5 –
Figure 5 – Intermittent periodic duty with electric braking – Duty type S5 . 20
Figure 6 – Continuous operation periodic duty – Duty type S6 . 21
Figure 7 – Continuous operation periodic duty with electric braking – Duty type S7 . 22
Figure 8 – Continuous operation periodic duty with related load/speed changes – Duty
type S8 . 23
Figure 9 – Duty with non-periodic load and speed variations – Duty type S9 . 24
Figure 10 – Duty with discrete constant loads – Duty type S10 . 26
Figure 11 – Voltage and frequency limits for generators . 36
Figure 12 – Voltage and frequency limits for motors . 36

Table 1 – Preferred voltage ratings . 29
Table 2 – Unbalanced operating conditions for synchronous machines . 33
Table 3 – CCC symbol designation . 34
Table 4 – Primary functions of machines . 35
Table 5 – Reference coolant (see also Table 11) . 37
Table 6 – Time interval . 41
Table 7 – Measuring points . 44
Table 8 – Limits of temperature rise of windings indirectly cooled by air. 46
Table 9 – Limits of temperature rise of windings indirectly cooled by hydrogen . 47
Table 10 – Adjustments to limits of temperature rise at the operating site of indirect
cooled windings to take account of non-reference operating conditions and ratings . 48
Table 11 – Assumed maximum ambient temperature . 49
Table 12 – Adjusted limits of temperature rise at the test site (∆θ ) for windings
T
indirectly cooled by air to take account of test site operating conditions . 50
Table 13 – Limits of temperature of directly cooled windings and their coolants . 51
Table 14 – Adjustments to limits of temperature at the operating site for windings
directly cooled by air or hydrogen to take account of non-reference operating
conditions and ratings . 51
Table 15 – Adjusted limits of temperature at the test site θ for windings directly
T
cooled by air to take account of test site operating conditions . 52
Table 16 – Minimum routine tests for machines assembled and tested in the factory of
the manufacturer . 53
Table 17 – Withstand voltage tests . 54
1
Table 18 – Maximum safe operating speed (min− ) of three-phase single-speed cage
induction motors for voltages up to and including 1 000 V . 58
Table 19 – Overspeeds . 59
Table 20 – Cross-sectional areas of earthing conductors . 64
Table 21 – Schedule of tolerances on values of quantities . 65
Table B.1 – Electromagnetic emission limits per CISPR 11 Class B Group 1. 70
Table B.2 – Electromagnetic emission limits per CISPR 11 Class A Group 1. 70

---------------------- Page: 7 ----------------------
– 6 – IEC 60034-1:2017  IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ROTATING ELECTRICAL MACHINES –

Part 1: Rating and performance

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 order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself
...

SLOVENSKI STANDARD
oSIST IEC 60034-1:2018
01-januar-2018
(OHNWULþQLURWDFLMVNLVWURMLGHO1D]LYQLSRGDWNLLQSUHVNXVODVWQRVWL
Rotating electrical machines - Part 1: Rating and performance
Drehende elektrische Maschinen - Teil 1: Bemessung und Betriebsverhalten
Machines électriques tournantes - Partie 1: Caractéristiques assignées et
caractéristiques de fonctionnement
Ta slovenski standard je istoveten z: IEC 60034-1 Ed. 13.0
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
oSIST IEC 60034-1:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST IEC 60034-1:2018

---------------------- Page: 2 ----------------------
oSIST IEC 60034-1:2018



IEC 60034-1

®


Edition 13.0 2017-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Rotating electrical machines –

Part 1: Rating and performance




Machines électriques tournantes –

Partie 1: Caractéristiques assignées et caractéristiques de fonctionnement
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.160.01 ISBN 978-2-8322-4210-0



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: 3 ----------------------
oSIST IEC 60034-1:2018
– 2 – IEC 60034-1:2017  IEC 2017
CONTENTS
FOREWORD . 6
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Duty . 15
4.1 Declaration of duty . 15
4.2 Duty types . 16
4.2.1 Duty type S1 – Continuous running duty . 16
4.2.2 Duty type S2 – Short-time duty . 17
4.2.3 Duty type S3 – Intermittent periodic duty . 17
4.2.4 Duty type S4 – Intermittent periodic duty with starting . 18
4.2.5 Duty type S5 – Intermittent periodic duty with electric braking. 20
4.2.6 Duty type S6 – Continuous operation periodic duty . 21
4.2.7 Duty type S7 – Continuous operation periodic duty with electric braking . 22
4.2.8 Duty type S8 – Continuous operation periodic duty with related
load/speed changes . 22
4.2.9 Duty type S9 – Duty with non-periodic load and speed variations . 24
4.2.10 Duty type S10 – Duty with discrete constant loads and speeds . 24
5 Rating. 26
5.1 Assignment of rating . 26
5.2 Classes of rating . 26
5.2.1 Rating for continuous running duty . 26
5.2.2 Rating for short-time duty . 26
5.2.3 Rating for periodic duty . 26
5.2.4 Rating for non-periodic duty . 27
5.2.5 Rating for duty with discrete constant loads and speeds . 27
5.2.6 Rating for equivalent loading . 27
5.3 Selection of a class of rating . 27
5.4 Allocation of outputs to class of rating . 28
5.5 Rated output . 28
5.5.1 DC generators . 28
5.5.2 AC generators . 28
5.5.3 Motors . 28
5.5.4 Synchronous condensers . 28
5.6 Rated voltage . 28
5.6.1 DC generators . 28
5.6.2 AC generators . 29
5.7 Co-ordination of voltages and outputs . 29
5.8 Machines with more than one rating . 29
6 Site conditions . 29
6.1 General . 29
6.2 Altitude . 29
6.3 Maximum ambient air temperature . 29
6.4 Minimum ambient air temperature . 30
6.5 Water coolant temperature . 30
6.6 Standstill, storage and transport . 30

---------------------- Page: 4 ----------------------
oSIST IEC 60034-1:2018
IEC 60034-1:2017  IEC 2017 – 3 –
6.7 Purity of hydrogen coolant . 30
7 Electrical operating conditions . 30
7.1 Electrical supply . 30
7.2 Form and symmetry of voltages and currents . 31
7.2.1 AC motors . 31
7.2.2 AC generators . 32
7.2.3 Synchronous machines . 32
7.2.4 DC motors supplied from static power converters . 33
7.3 Voltage and frequency variations during operation . 34
7.4 Three-phase a.c. machines operating on unearthed systems . 36
7.5 Voltage (peak and gradient) withstand levels . 36
8 Thermal performance and tests . 37
8.1 Thermal class . 37
8.2 Reference coolant . 37
8.3 Conditions for thermal tests . 38
8.3.1 Electrical supply . 38
8.3.2 Temperature of machine before test . 38
8.3.3 Temperature of coolant . 38
8.3.4 Measurement of coolant temperature during test . 38
8.4 Temperature rise of a part of a machine . 39
8.5 Methods of measurement of temperature . 39
8.5.1 General . 39
8.5.2 Resistance method . 39
8.5.3 Embedded temperature detector (ETD) method . 39
8.5.4 Thermometer method. 39
8.6 Determination of winding temperature . 39
8.6.1 Choice of method . 39
8.6.2 Determination by resistance method . 40
8.6.3 Determination by ETD method . 42
8.6.4 Determination by thermometer method . 42
8.7 Duration of thermal tests . 43
8.7.1 Rating for continuous running duty . 43
8.7.2 Rating for short-time duty . 43
8.7.3 Rating for periodic duty . 43
8.7.4 Ratings for non-periodic duty and for duty with discrete constant loads . 43
8.8 Determination of the thermal equivalent time constant for machines of duty
type S9 . 43
8.9 Measurement of bearing temperature . 43
8.10 Limits of temperature and of temperature rise . 44
8.10.1 General . 44
8.10.2 Indirect cooled windings . 44
8.10.3 Direct cooled windings . 49
8.10.4 Adjustments to take account of hydrogen purity on test . 50
8.10.5 Permanently short-circuited windings, magnetic cores and all structural
components (other than bearings) whether or not in contact with
insulation . 50
8.10.6 Commutators and sliprings, open or enclosed and their brushes and
brushgear . 50
9 Other performance and tests . 52

---------------------- Page: 5 ----------------------
oSIST IEC 60034-1:2018
– 4 – IEC 60034-1:2017  IEC 2017
9.1 Routine tests. 52
9.2 Withstand voltage test . 53
9.3 Occasional excess current . 55
9.3.1 General . 55
9.3.2 Generators . 56
9.3.3 Motors (except commutator motors and permanent magnet motors) . 56
9.3.4 Commutator machines . 56
9.4 Momentary excess torque for motors . 56
9.4.1 Polyphase induction motors and d.c. motors . 56
9.4.2 Polyphase synchronous motors . 57
9.4.3 Other motors . 57
9.5 Pull-up torque . 57
9.6 Safe operating speed of cage induction motors . 57
9.7 Overspeed . 58
9.8 Short-circuit current for synchronous machines . 59
9.9 Short-circuit withstand test for synchronous machines . 59
9.10 Commutation test for commutator machines . 60
9.11 Total harmonic distortion (THD) for synchronous machines . 60
9.11.1 General . 60
9.11.2 Limits . 60
9.11.3 Tests . 60
10 Rating plates . 60
10.1 General . 60
10.2 Marking . 61
11 Miscellaneous requirements . 62
11.1 Protective earthing of machines . 62
11.2 Shaft-end key(s) . 64
12 Tolerances . 64
12.1 General . 64
12.2 Tolerances on values of quantities . 64
13 Electromagnetic compatibility (EMC) . 66
13.1 General . 66
13.2 Immunity . 66
13.2.1 Machines not incorporating electronic circuits . 66
13.2.2 Machines incorporating electronic circuits . 67
13.3 Emission . 67
13.4 Immunity tests . 67
13.5 Emission measurements . 67
14 Safety . 67
Annex A (informative) Guidance for the application of duty type S10 and for
establishing the value of relative thermal life expectancy TL . 69
Annex B (informative) Electromagnetic compatibility (EMC) limits . 70
Bibliography . 71

Figure 1 – Continuous running duty – Duty type S1 . 16
Figure 2 – Short-time duty – Duty type S2 . 17
Figure 3 – Intermittent periodic duty – Duty type S3 . 18
Figure 4 – Intermittent periodic duty with starting – Duty type S4 . 19

---------------------- Page: 6 ----------------------
oSIST IEC 60034-1:2018
IEC 60034-1:2017  IEC 2017 – 5 –
Figure 5 – Intermittent periodic duty with electric braking – Duty type S5 . 20
Figure 6 – Continuous operation periodic duty – Duty type S6 . 21
Figure 7 – Continuous operation periodic duty with electric braking – Duty type S7 . 22
Figure 8 – Continuous operation periodic duty with related load/speed changes – Duty
type S8 . 23
Figure 9 – Duty with non-periodic load and speed variations – Duty type S9 . 24
Figure 10 – Duty with discrete constant loads – Duty type S10 . 26
Figure 11 – Voltage and frequency limits for generators . 36
Figure 12 – Voltage and frequency limits for motors . 36

Table 1 – Preferred voltage ratings . 29
Table 2 – Unbalanced operating conditions for synchronous machines . 33
Table 3 – CCC symbol designation . 34
Table 4 – Primary functions of machines . 35
Table 5 – Reference coolant (see also Table 11) . 37
Table 6 – Time interval . 41
Table 7 – Measuring points . 44
Table 8 – Limits of temperature rise of windings indirectly cooled by air. 46
Table 9 – Limits of temperature rise of windings indirectly cooled by hydrogen . 47
Table 10 – Adjustments to limits of temperature rise at the operating site of indirect
cooled windings to take account of non-reference operating conditions and ratings . 48
Table 11 – Assumed maximum ambient temperature . 49
Table 12 – Adjusted limits of temperature rise at the test site (∆θ ) for windings
T
indirectly cooled by air to take account of test site operating conditions . 50
Table 13 – Limits of temperature of directly cooled windings and their coolants . 51
Table 14 – Adjustments to limits of temperature at the operating site for windings
directly cooled by air or hydrogen to take account of non-reference operating
conditions and ratings . 51
Table 15 – Adjusted limits of temperature at the test site θ for windings directly
T
cooled by air to take account of test site operating conditions . 52
Table 16 – Minimum routine tests for machines assembled and tested in the factory of
the manufacturer . 53
Table 17 – Withstand voltage tests . 54
1
Table 18 – Maximum safe operating speed (min− ) of three-phase single-speed cage
induction motors for voltages up to and including 1 000 V . 58
Table 19 – Overspeeds . 59
Table 20 – Cross-sectional areas of earthing conductors . 64
Table 21 – Schedule of tolerances on values of quantities . 65
Table B.1 – Electromagnetic emission limits per CISPR 11 Class B Group 1. 70
Table B.2 – Electromagnetic emission limits per CISPR 11 Class A Group 1. 70

---------------------- Page: 7 ----------------------
oSIST IEC 60034-1:2018
– 6 – IEC 60034-1:2017  IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ROTATING ELECTRICAL MACHINES –

Part 1: Rating and performance

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
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International Standard IEC 60034-1 has been prepared by IEC technical committee 2:
Rotating machinery.
This thirteenth edition cancels and replaces the twelfth edition published in 2010. It
constitutes a technical revision.

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oSIST IEC 60034-1:2018
IEC 60034-1:2017  IEC 2017 – 7 –
The main technical changes with regard to the previous edition are as follows:
Clause or
Change
subclause
3.25 Shorter time to thermal equilibrium
5.5.2 Note on P-Q capability diagram for synchronous generators

6.4 Clarification added that other conditions can be agreed on
6.6 Clarification added that standstill is explicitly included; note added
7.1 Clarification on bus transfer or fast reclosing
Capability to withstand impulse voltages in case of machines connected to a U converter
7.2.4 New Table 3 for identification code
7.3 Table 4 corrected to reflect current scope of IEC 60034-3
7.5 Voltage withstand level for machines connected to a converter
8.3.4 Measurement of ambient air temperature in case of open machines
8.6.3.4 Notes on ETD in the end windings of high voltage machines and on ETD use to monitor
strand blockage in case of directly liquid cooled windings
8.10 Clarification on temperature limit
Clarification on temperature difference between method R and method ETD
Clarification that temperature limit acc. to method R must always be kept
Note on measured temperature limits between methods R and ETD
Table 8 and Table 11 extended incorporating thermal class 200 (N)
Line 4c) of Table 8 restricted to field windings of DC machines
Temperature limits in Table 8 changed according to 2/1737/DC and the comments received
on this document
Physically correct formula in Table 10, item 1b
9.1 Clarification on machines that are subject to routine testing
9.2 Separate withstand voltage testing of phases
Clarification on frequency and time instant for withstand voltage test
Note on leakage current during withstand voltage test
Note referring to IEC 60027
10.2 Information on IVIC on rating plate or in documentation
Clarification added to item f
IC code and design letter for locked-rotor apparent power on rating plate
11.1 Clarification on cross-sectional area of earthing conductor for generators
Note on grounding for small machines added
12.2 Tolerance on field current of synchronous machines added
Tolerance on power factor applies also for PM synchronous machines operated directly at the
lines
Contradiction between tolerances on efficiency and on losses clarified
13.1 Changed as proposed by ACEC
Note for large generators added
13.3 Changed as proposed by ACEC
13.5 Changed as proposed by ACEC
Annex B DC power supply added

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oSIST IEC 60034-1:2018
– 8 – IEC 60034-1:2017  IEC 2017
The text of this standard is based on the following documents:
FDIS Report on voting
2/1857/FDIS 2/1863/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60034 series, published under the general title Rotating electrical
machines, can be found on the IEC website.
NOTE A table of cross-references of all IEC TC 2 publications can be found in the IEC TC 2 dashboard on the
IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" i
...