IEC 60034-29:2008

Rotating electrical machines - Part 29: Equivalent loading and superposition techniques - Indirect testing to determine temperature rise

IEC 60034-29 provides various indirect load tests, the purpose of which is to determine the temperature rise of rotating electrical machines, including a.c. induction machines, a.c. synchronous machines and d.c. machines. The test methods in some cases provide, in addition, means of measuring or estimating other parameters such as losses and vibration. Applies to machines covered by IEC 60034-1 when they cannot be loaded to a specific condition. Is applicable to both motors and generators.

Machines électriques tournantes - Partie 29: Techniques par charge équivalente et par superposition - Essais indirects pour déterminer l'échauffement

La CEI 60034-29 fournit différents essais en charge indirects destinés à déterminer l'échauffement des machines électriques tournantes, y compris les machines à induction à courant alternatif, les machines synchrones à courant alternatif et les machines à courant continu. Dans certains cas, les méthodes d'essai permettent en outre de mesurer ou d'estimer d'autres paramètres tels que les pertes et les vibrations. S'applique aux machines couvertes par la CEI 60034-1 lorsqu'il est impossible de les soumettre à un point de charge spécifique. Est applicable tant aux moteurs qu'aux génératrices.

General Information

• Status: Published
• Publication Date: 10-Mar-2008
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: TC 2 - Rotating machinery
• Drafting Committee: WG 28 - TC 2/WG 28
• Current Stage: PPUB - Publication issued
• Start Date: 15-Mar-2008
• Completion Date: 11-Mar-2008

Relations

• Replaces: IEC 61986:2002 - Rotating electrical machines - Equivalent loading and super-position techniques - Indirect testing to determine temperature rise
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60034-29
Edition 1.0 2008-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 29: Equivalent loading and superposition techniques – Indirect testing to
determine temperature rise
Machines électriques tournantes –
Partie 29: Techniques par charge équivalente et par superposition – Essais
indirects pour déterminer l’échauffement

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IEC 60034-29
Edition 1.0 2008-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 29: Equivalent loading and superposition techniques – Indirect testing to
determine temperature rise
Machines électriques tournantes –
Partie 29: Techniques par charge équivalente et par superposition – Essais
indirects pour déterminer l’échauffement

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 29.160 ISBN 2-8318-9598-7
– 2 – 60034-29 © IEC:2008
CONTENTS
FOREWORD.0H3
INTRODUCTION.1H5
1 Scope.2H6
2 Normative references .3H6
3 Symbols and units .4H6
4 General test requirements .5H7
5 Superposition method.6H8
5.1 Basic principles .7H8
5.1.1 General .8H8
5.1.2 Temperature rise .9H9
5.1.3 Estimation of temperature rise from reduced load tests .10H9
5.2 Induction motors.11H10
5.2.1 Applicable tests .12H10
5.2.2 Method of reduced voltage and rated current.13H10
5.2.3 Method of rated voltage and reduced current.14H13
5.2.4 Method combining tests at reduced voltage and reduced current .15H14
5.3 Synchronous machines .16H14
5.3.1 Method of open circuit, short circuit, zero excitation .17H14
5.3.2 Method of zero power factor and open circuit loading .18H16
5.4 DC machines.19H17
6 Equivalent load method .20H17
6.1 Principles .21H17
6.1.1 General .22H17
6.1.2 Temperature rise .23H18
6.2 Induction motors.24H18
6.2.1 Forward short-circuit test .25H18
6.2.2 Modulated frequency method.26H19
6.2.3 DC injection.27H20
6.2.4 Mixed-frequency or bi-frequency method .28H21
6.3 Synchronous machines – Zero power factor .29H24
7 Preferred methods.30H26
Annex A (informative) Example calculation .31H28

Figure 1 – Graphical superposition method for induction motors .32H12
Figure 2 – Derivation of field winding temperature rise at rated load (synchronous
machines) .33H16
Figure 3 – Test circuit for d.c.-injection equivalent load test.34H20
Figure 4 – Mixed-frequency test – Generators in series .35H21
Figure 5 – Mixed-frequency test – Series transformer .36H22
Figure 6 – Combination of torque and current in a mixed-frequency test .37H23
Figure 7 – Rotor-feeding mixed-frequency method.38H24

39H27
Table 1 – Preferred methods.

60034-29 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
ROTATING ELECTRICAL MACHINES –

Part 29: Equivalent loading and superposition techniques –
Indirect testing to determine temperature rise

FOREWORD
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International Standard IEC 60034-29 has been prepared by IEC technical committee 2:
Rotating machinery. It cancels and replaces IEC 61986:2002 which is withdrawn.
The text of this standard is based on the following documents:
FDIS Report on voting
2/1476/FDIS 2/1491A/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 IEC 60034 series, under the general title Rotating electrical machines, can
be found on the IEC website.
– 4 – 60034-29 © IEC:2008
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
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