IEC 60034-30-1:2025
(Main)Rotating electrical machines - Part 30-1: Efficiency classes of line operated AC motors (IE code)
Rotating electrical machines - Part 30-1: Efficiency classes of line operated AC motors (IE code)
IEC 60034-30-1:2025 specifies efficiency classes for single-speed electric motors that are rated in accordance with IEC 60034‑1 or IEC 60079‑0 and are rated for operation on a sinusoidal either 50 Hz or 60 Hz, or both voltage supply.
The motors within this document:
- have a rated power PN from 0,12 kW to 1 000 kW;
- have a rated voltage UN from 50 V up to and including 1 000 V;
- have 2, 4, 6 or 8 poles;
- are capable of continuous operation at their rated power with a temperature rise within the specified insulation temperature class;
NOTE 1 Most motors covered by this document are rated for duty type S1 (continuous duty). However, some motors that are rated for other duty cycles are still capable of continuous operation at their rated power, and these motors are also covered by this document.
- are marked with any ambient temperature within the range of –30 °C to +60 °C;
NOTE 2 The rated efficiency and efficiency classes are based on 25 °C ambient temperature in accordance with IEC 60034‑2‑1.
NOTE 3 Motors exclusively rated for temperatures outside the range – 30 °C and +60 °C are considered to be of special construction and are consequently excluded from this document.
NOTE 4 Smoke extraction motors with a temperature class of up to and including 400 °C are covered by this document.
- are marked with an altitude up to 4 000 m above sea level.
NOTE 5 The rated efficiency and efficiency class are based on a rating for altitudes up to 1 000 m above sea level.
This document establishes a set of nominal efficiency values based on supply frequency, number of poles and motor output power. No distinction is made between motor technologies, supply voltage or motors with increased insulation designed specifically for converter operation even though not all motor technologies are capable of reaching the higher efficiency classes (see Table 1). This makes different motor technologies fully comparable with respect to their energy efficiency potential.
The efficiency of power-drive systems is not covered by this document. Motor losses due to harmonic content of the supply voltage, losses in cables, filters and frequency-converters, are not covered.
Motors with flanges, feet or shafts with mechanical dimensions different from IEC 60072‑1 are covered by this document.
Geared motors are covered by this document including those incorporating non-standard shafts and flanges.
This document does not apply to the following:
- Single-speed motors with 10 or more poles or multi-speed motors.
- Motors with mechanical commutators (such as DC motors).
- Motors completely integrated into a machine (for example pump, fan and compressor) that cannot be practically tested separately from the machine even with provision of a temporary end-shield and drive-end bearing. This means the motor: a) shares common components (apart from connectors such as bolts) with the driven unit (for example, a shaft or housing) and b) is not designed in such a way as to enable the motor to be separated from the driven unit as an entire motor that can operate independently of the driven unit. That is, for a motor to be excluded from this document, the process of separation shall render the motor inoperative.
- Totally enclosed air-over machines (TEAO, IC418), i.e. totally enclosed frame-surface cooled machines intended for exterior cooling by a ventilating means external to the machine. Efficiency testing of such motors can be performed with the fan removed and the cooling provided by an external blower with a similar airflow rate as the original fan.
- Motors with integrated frequency converters (compact drives) when the motor cannot be tested separately from the converter. Energy efficiency classification of compact drives is based on the complete product (PDS, ie. Power Drive System) and is defined in IEC 61800‑9‑2.
NOTE 6 A motor is not excluded when the motor and frequency-converter can be separated, and the motor can be tested independently of th
Machines électriques tournantes - Partie 30-1: Classes de rendement pour les moteurs à courant alternatif alimentés par le réseau (code IE)
L'IEC 60034-30-1:2025 spécifie les classes de rendement pour les moteurs électriques à une seule vitesse qui sont classés conformément à l'IEC 60034‑1 ou à l'IEC 60079‑0. Ces moteurs sont assignés pour fonctionner soit avec une tension d'alimentation sinusoïdale de 50 Hz ou 60 Hz, soit avec ces deux valeurs de tension.
Les moteurs traités dans le présent document:
- ont une puissance assignée PN de 0,12 kW à 1 000 kW;
- ont une tension assignée UN de 50 V jusqu'à 1 000 V inclus;
- ont 2, 4, 6 ou 8 pôles;
- peuvent fonctionner en continu à leur puissance assignée avec un échauffement ne dépassant pas la classe de température d'isolation spécifiée;
NOTE 1 La plupart des moteurs couverts par le présent document sont assignés pour un type de régime S1 (régime continu). Toutefois, certains moteurs assignés pour d'autres cycles de service peuvent encore fonctionner en continu à leur puissance assignée et ces moteurs sont également couverts par le présent document.
sont marqués pour toute température ambiante dans la gamme de –30 °C à +60 °C;
NOTE 2 Le rendement assigné et les classes de rendement sont fondés sur une température ambiante de 25 °C, conformément à l'IEC 60034‑2‑1.
NOTE 3 On considère que les moteurs exclusivement assignés pour des températures extérieures à la gamme de – 30 °C à +60 °C sont d'une construction particulière et ils sont en conséquence exclus du présent document.
NOTE 4 Les moteurs pour extraction de fumée d'une classe de température allant jusqu'à 400 °C inclus sont couverts par le présent document.
sont marqués pour une altitude allant jusqu'à 4 000 m au-dessus du niveau de la mer.
NOTE 5 Le rendement assigné et la classe de rendement sont fondés sur des altitudes allant jusqu'à 1 000 m au-dessus du niveau de la mer.
Le présent document définit un ensemble de valeurs nominales de rendement en se fondant sur la fréquence d'alimentation, le nombre de pôles et la puissance de sortie du moteur. Aucune distinction n'est établie entre les technologies de moteur, la tension d'alimentation ou les moteurs ayant une isolation renforcée, conçus en particulier pour le fonctionnement des convertisseurs, même si ces technologies de moteur peuvent ne pas être toutes en mesure d'atteindre les classes de rendement supérieures (voir le Tableau 1). Ceci permet de comparer entièrement des technologies de moteur différentes en fonction de leur potentiel de rendement énergétique.
Le rendement des systèmes d'entraînement mécanique n'est pas couvert par le présent document. Les pertes dans les moteurs dues à la teneur en harmoniques de la tension d'alimentation, les pertes dans les câbles, les filtres et les convertisseurs de fréquence, ne sont pas couvertes.
Les moteurs avec brides, à pattes ou avec arbres ayant des dimensions mécaniques différentes de celles fixées par l'IEC 60072‑1 sont couverts par le présent document.
Les moteurs avec réducteur sont couverts par le présent document., ce qui inclut les moteurs comportant des arbres et des brides non normalisés.
Le présent document ne s'applique pas aux éléments suivants:
- les moteurs à une seule vitesse avec 10 pôles ou plus ou les moteurs à plusieurs vitesses;
- les moteurs avec commutateurs mécaniques (tels que les moteurs à courant continu);
- les moteurs complètement intégrés dans une machine (par exemple pompe, ventilateur, compresseur) qui ne peuvent pas faire l'objet d'essais séparément de la machine, même en prévoyant un blindage d'extrémité temporaire et un palier d'extrémité d'entraînement. Ceci signifie que le moteur: a) partage des composants communs (hormis les connecteurs tels que les boulons) avec l'unité entraînée (par exemple, un arbre ou un carter) et b) n'est pas conçu de telle manière à permettre la séparation du moteur de l'unité entraînée comme un moteur complet qui peut fonctionner indépendamment de l'unité entraînée. C'est-à-dire que pour qu'un moteur soit exclu du présent document, le processus de séparation doit rendre le moteu
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Standards Content (Sample)
IEC 60034-30-1 ®
Edition 2.0 2025-12
INTERNATIONAL
STANDARD
COMMENTED VERSION
Rotating electrical machines -
Part 30-1: Efficiency classes of line operated AC motors (IE code)
ICS 29.160.01 ISBN 978-2-8327-0920-7
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CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 8
3 Terms, definitions and symbols . 9
3.1 Terms and definitions. 9
3.2 Symbols . 10
4 Fields of application . 10
5 Efficiency. 11
5.1 Determination . 11
5.1.1 General . 11
5.1.2 Rated voltages, rated frequencies and rated power . 12
5.1.3 Auxiliary devices . 12
5.2 Rating . 13
5.3 Classification and marking . 13
5.3.1 General . 13
5.3.2 Efficiency classification . 13
5.3.3 Motors below IE1 efficiency . 13
5.3.4 Marking . 13
5.4 Nominal limits for efficiency classes IE1, IE2, IE3, IE4 and IE5 . 14
5.4.1 Nominal efficiency limits for IE1 . 14
5.4.2 Nominal efficiency limits for IE2 (see Tables 5 and 6) . 16
5.4.3 Nominal efficiency limits for IE3 (see Tables 7 and 8) . 18
5.4.4 Nominal efficiency limits for IE4 (see Tables 9 and 10) . 20
5.4.5 Nominal efficiency limits for IE5 . 22
5.4.6 Interpolation of nominal efficiency limits of intermediate rated output
powers for 50 Hz mains supply frequency . 24
5.4.7 Interpolation of nominal efficiency limits of intermediate rated powers
for 60 Hz mains supply frequency . 26
Annex A (informative) Nominal limits for efficiency class IE5 . 27
Annex A (informative) Nominal, rated (declared), minimum efficiency and tolerance . 27
Bibliography . 28
List of comments. 29
Figure A.1 – Nominal efficiency and tolerance . 27
Table 1 – Common motor technologies and their energy efficiency potential . 10
Table 2 – IE efficiency classification . 13
Table 3 – Nominal efficiency limits (%) for 50 Hz IE1 . 14
Table 4 – Nominal efficiency limits (%) for 60 Hz IE1 . 15
Table 5 – Nominal efficiency limits (%) for 50 Hz IE2 . 16
Table 6 – Nominal efficiency limits (%) for 60 Hz IE2 . 17
Table 7 – Nominal efficiency limits (%) for 50 Hz IE3 . 18
Table 8 – Nominal efficiency limits (%) for 60 Hz IE3 . 19
Table 9 – Nominal efficiency limits (%) for 50 Hz IE4 . 20
Table 10 – Nominal efficiency limits (%) for 60 Hz IE4 . 21
Table 11 – Nominal efficiency limits (%) for 50 Hz IE5 . 22
Table 12 – Nominal efficiency limits (%) for 60 Hz IE5 . 23
Table 13 – Interpolation coefficients for 0,12 kW to 0,74 0,55 kW . 24
Table 14 – Interpolation coefficients for 0,75 kW up to 200 kW . 25
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Rotating electrical machines -
Part 30-1: Efficiency classes of line operated AC motors (IE code)
FOREWORD
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This commented version (CMV) of the official standard IEC 60034-30-1:2025 edition 2.0 allows
the user to identify the changes made to the previous IEC 60034-30-1:2014 edition 1.0.
Furthermore, comments from IEC TC 2 experts are provided to explain the reasons of the most
relevant changes, or to clarify any part of the content.
A vertical bar appears in the margin wherever a change has been made. Additions are in green
text, deletions are in strikethrough red text. Experts' comments are identified by a blue-
background number. Mouse over a number to display a pop-up note with the comment.
This publication contains the CMV and the official standard. The full list of comments is available
at the end of the CMV.
IEC 60034-30-1 has been prepared by IEC Technical Committee 2: Rotating machinery. It is an
International Standard.
This second edition of IEC 60034-30-1 cancels and replaces the first edition of IEC 60034-30-1
published in 2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Table 1 in Clause 4 revised and IE5 efficiency introduced.
b) New efficiency tables (Table 11 and Table 12) added for IE5 nominal efficiency limits.
c) Table 13 for interpolation coefficients revised based on IE5 limits and the coefficients limited
from 0,12 kW to 0,75 kW 0,12 kW to 0,55 kW. A linear interpolation shall be applied to obtain
minimum efficiency between 0,55 kW and 0,75 kW.
d) Annex A revised and added Figure A.1 showing nominal, rated, minimum efficiency and
tolerance.
The text of this International Standard is based on the following documents:
Draft Report on voting
2/2235/FDIS 2/2279/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard are English and French.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
NOTE A table of cross-references of all IEC TC 2 publications can
...
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