EN 60034-30-1:2014

Rotating electrical machines - Part 30-1: Efficiency classes of line operated AC motors (IE code)

IEC 60034-30-1:2014 specifies efficiency classes for single-speed electric motors that are rated according to IEC 60034-1 or IEC 60079-0, for operation on a sinusoidal voltage supply. This standard establishes a set of limit efficiency values based on frequency, number of poles and motor power. No distinction is made between motor technologies, supply voltage or motors with increased insulation designed specifically for converter operation even though these motor technologies may not all be capable of reaching the higher efficiency classes. This makes different motor technologies fully comparable with respect to their energy efficiency potential.

Drehende elektrische Maschinen - Teil 30-1: Wirkungsrad-Klassifizierung von netzgespeisten Drehstrommotoren (IE-Code)

Machines électriques tournantes - Partie 30-1: Classes de rendement pour les moteurs à courant alternatif alimentés par le réseau (code IE)

L'IEC 60034-30-1:2014 spécifie les classes de rendement pour les moteurs électriques mono vitesse qui sont classés conformément à la CEI 60034-1 ou à la CEI 60079-0. Ces moteurs sont classés pour fonctionner avec une tension d'alimentation sinusoïdale. La présente norme définit un ensemble de valeurs limites de rendement en se basant sur la fréquence, le nombre de pôles et la puissance 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. Ceci permet de comparer entièrement des technologies de moteur différentes en fonction de leur potentiel de rendement énergétique.

Električni rotacijski stroji - 30-1. del: Razredi izkoristka enohitrostnih trifaznih motorjev s kratkostično kletko (koda IE) (IEC 60034-30-1:2014)

Standard EN IEC 60034-30-1 določa razrede izkoristkov za enohitrostne električne motorje v skladu s standardom IEC 60034-1 ali IEC 60079-0, ki so opredeljeni za delovanje pri sinusnem napetostnem napajanju in: • imajo nazivno moč PN od 0,12 kW do 1.000 kW; • imajo nazivno napetost od 50 V do največ 1 kV; • imajo 2, 4, 6 ali 8 polov; • lahko neprekinjeno delujejo pri nazivni moči in povišanju temperature v okviru podanega temperaturnega razreda izolacije; • so označeni s poljubno temperaturo okolice v razponu od -20 °C do + 60 °C; • so označeni z nadmorsko višino do največ 4.000 m.

General Information

• Status: Published
• Publication Date: 05-Jun-2014
• Withdrawal Date: 09-Apr-2017
• ICS: 29.160 - Rotating machinery
• Technical Committee: CLC/TC 2 - Rotating machinery
• Drafting Committee: IEC/TC 2 - IEC_TC_2
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Jun-2014
• Completion Date: 06-Jun-2014
• Ref Project: SIST EN 60034-30-1:2014 - Rotating electrical machines - Part 30-1: Efficiency classes of single-speed, three-phase, cage-induction motors (IE code) (IEC 60034-30-1:2014)

Relations

• Replaces: EN 60034-30:2009 - Rotating electrical machines - Part 30: Efficiency classes of single-speed, three-phase, cage-induction motors (IE-code)
• Effective Date: 29-Jan-2023
• Replaces: CLC/TS 60034-31:2011 - Rotating electrical machines - Part 31: Selection of energy-efficient motors including variable speed applications - Application guide
• Effective Date: 29-Jan-2023
• Revised: EN IEC 60034-30-1:2026 - Rotating electrical machines - Part 30-1: Efficiency classes of line operated AC motors (IE code)
• Effective Date: 20-Feb-2024

Overview

EN 60034-30-1:2014 (identical to IEC 60034-30-1:2014) defines efficiency classes (IE code) for single-speed, line-operated AC motors. Published by CLC/CENELEC, the standard harmonizes energy-efficiency classification across a wide product range (from small motors ~0.12 kW up to high-power motors), for operation on a sinusoidal voltage supply. It establishes nominal efficiency limits that depend on mains frequency (50 Hz / 60 Hz), number of poles, and rated motor power, making different motor technologies directly comparable with respect to energy efficiency.

Key topics

• Scope and applicability: Applies to motors rated according to IEC 60034-1 or IEC 60079-0, including single- and three-phase low-voltage induction motors and line-start permanent-magnet motors that are intended for on-line operation.
• IE efficiency classes: Defines IE1, IE2, IE3 and IE4 as normative classes (IE5 is described informatively for future development). The standard provides tables of nominal efficiency limits for each class.
• Determination and testing: Specifies how efficiency is determined and classified; references established test methods (see IEC 60034-2-1 and related documents) for loss and efficiency measurement.
• Rating and marking: Sets rules for motor rating, classification and labelling so purchasers and specifiers can identify the IE class on motor nameplates and documentation.
• Interpolation rules: Includes procedures to interpolate efficiency limits for intermediate rated powers and different pole numbers and frequencies.
• Technology-neutral comparison: Makes no distinction between motor technologies, supply voltages or motors with converter-capable insulation - enabling apples-to-apples efficiency comparisons even if some technologies cannot reach the highest classes.

Applications

• Motor manufacturers: To design, rate and mark motors with defined IE classes and ensure compliance with harmonized efficiency benchmarks.
• OEMs and system designers: To select appropriately efficient motors for equipment and systems, optimize lifecycle energy use and reduce operating costs.
• Procurement teams & energy managers: For specification and purchasing of motors by minimum IE class to meet energy and sustainability targets.
• Test laboratories & certification bodies: To verify compliance using referenced test procedures and ensure consistent efficiency measurement.
• Regulators & policy makers: As a harmonized reference for minimum performance requirements and ecodesign regulations.

Related standards

• IEC 60034-1 (Rating and performance)
• IEC 60034-2-1 (Methods for determining losses and efficiency)
• IEC 60079-0 (Explosive atmospheres - general requirements)
• IEC/TS 60034-2-3 and IEC/TS 60034-31 (converter-fed and converter-design guidance)

EN 60034-30-1:2014 is essential when specifying or evaluating motor efficiency, enabling transparent, technology-neutral comparison and better energy decision‑making for industrial and commercial applications.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2014
1DGRPHãþD
SIST EN 60034-30:2009
(OHNWULþQLURWDFLMVNLVWURMLGHO5D]UHGLL]NRULVWNDHQRKLWURVWQLKWULID]QLK
PRWRUMHYVNUDWNRVWLþQRNOHWNRNRGD,(,(&
Rotating electrical machines - Part 30-1: Efficiency classes of single-speed, three-phase,
cage-induction motors (IE code) (IEC 60034-30-1:2014)
Drehende elektrische Maschinen - Teil 30-1: Wirkungrad-Klassifizierung von
netzgespeisten Drehstrommotoren (IE-Code) (IEC 60034-30-1:2014)
Machines électriques tournantes - Partie 30-1: Classes de rendement pour les moteurs à
courant alternatif alimentés par le réseau (Code IE) (IEC 60034-30-1:2014)
Ta slovenski standard je istoveten z: EN 60034-30-1:2014
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60034-30-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 29.160 Supersedes EN 60034-30:2009,
CLC/TS 60034-31:2011 (partially)
English Version
Rotating electrical machines - Part 30-1: Efficiency classes of
line operated AC motors (IE code)
(IEC 60034-30-1:2014)
Machines électriques tournantes - Partie 30-1: Classes de Drehende elektrische Maschinen - Teil 30-1: Wirkungrad-
rendement pour les moteurs à courant alternatif alimentés Klassifizierung von netzgespeisten Drehstrommotoren
par le réseau (code IE) (IE-Code)
(CEI 60034-30-1:2014) (IEC 60034-30-1:2014)
This European Standard was approved by CENELEC on 2014-04-10. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60034-30-1:2014 E
Foreword
The text of document 2/1729/FDIS, future edition 1 of IEC 60034-30-1, prepared by IEC/TC 2
"Rotating machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC
as EN 60034-30-1:2014.
The following dates are fixed:
– latest date by which the document has to be implemented at (dop) 2015-01-10
national level by publication of an identical national
standard or by endorsement
– latest date by which the national standards conflicting with (dow) 2017-04-10
the document have to be withdrawn

This document supersedes EN 60034-30:2009 and partially supersedes CLC/TS 60034-31:2011
(Annex A).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60034-30-1:2014 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60034-5 NOTE Harmonized as EN 60034-5.
IEC 60034-12 NOTE Harmonized as EN 60034-12.
IEC/TS 60034-31:2010 NOTE Harmonized as CLC/TS 60034-31:2011 (not modified).

- 3 - EN 60034-30-1:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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.cenelec.eu.

Publication Year Title EN/HD Year
IEC 60034-1 -  Rotating electrical machines EN 60034-1 -
Part 1: Rating and performance
IEC 60034-2-1 -  Rotating electrical machines EN 60034-2-1 -
Part 2-1: Standard methods for
determining losses and efficiency from
tests (excluding machines for traction
vehicles)
IEC 60034-6 -  Rotating electrical machines EN 60034-6 -
Part 6: Methods of cooling (IC Code)
IEC 60038 -  IEC standard voltages EN 60038 -
IEC 60079-0 -  Explosive atmospheres EN 60079-0 -
Part 0: Equipment - General
requirements
IEC/TS 60034-2-3 -  Rotating electrical machines - -
Part 2-3: Specific test methods for
determining losses and efficiency of
converter-fed AC induction motors
IEC/TS 60034-25 -  Rotating electrical machines CLC/TS 60034-25 -
Part 25: Guidance for the design and
performance of a.c. motors specifically
designed for converter supply
IEC 60034-30-1 ®
Edition 1.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –

Part 30-1: Efficiency classes of line operated AC motors (IE code)

Machines électriques tournantes –

Partie 30-1: Classes de rendement pour les moteurs à courant alternatif

alimentés par le réseau (code IE)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.160 ISBN 978-2-8322-1415-2

– 2 – IEC 60034-30-1:2014 © IEC 2014
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 . 9
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 . 11
5.1.3 Auxiliary devices . 12
5.2 Rating . 12
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 and IE4 . 13
5.4.1 Nominal efficiency limits for IE1 . 14
5.4.2 Nominal efficiency limits for IE2 . 16
5.4.3 Nominal efficiency limits for IE3 . 18
5.4.4 Nominal efficiency limits for IE4 . 20
5.4.5 Interpolation of nominal efficiency limits of intermediate rated
powers for 50 Hz mains supply frequency . 21
5.4.6 Interpolation of nominal efficiency limits of intermediate rated
powers for 60 Hz mains supply frequency . 23
Annex A (informative) Nominal limits for efficiency class IE5 . 24
Bibliography . 25

Table 1 – 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 – Interpolation coefficients for 0,12 kW up to 0,74 kW . 22
Table 12 – Interpolation coefficients for 0,75 kW up to 200 kW . 22

IEC 60034-30-1:2014 © IEC 2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 30-1: Efficiency classes of line operated AC motors (IE code)

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 does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60034-30-1 has been prepared by IEC technical committee 2:
Rotating machinery.
This first edition of IEC 60034-30-1 cancels and replaces IEC 60034-30 (2008). It also
cancels and replaces Annex A of IEC 60034-31 (2010). In the next revision of IEC 60034-
31:2010 this annex will be removed from its contents.
The text of this standard is based on the following documents:
FDIS Report on voting
2/1729/FDIS 2/1739/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.

– 4 – IEC 60034-30-1:2014 © IEC 2014
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
NOTE A table of cross-references of all IEC TC 2 publications can be found on 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 web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC 60034-30-1:2014 © IEC 2014 – 5 –
INTRODUCTION
This IEC standard provides for the global harmonization of energy-efficiency classes of
electric motors. It deals with all kinds of electric motors that are rated for line operation
(including starting at reduced voltage). This includes all single- and three-phase low voltage
induction motors, regardless of their rated voltage and frequency, as well as line-start
permanent-magnet motors.
A second part of this standard series (IEC 60034-30-2) will be prepared for motors rated for
variable voltage and frequency supply, such as synchronous motors. The second part will also
provide for harmonic voltage losses in motors capable of line operation when fed by
frequency converters.
IEC 60034-30-1 widens the product range covered in the first edition of IEC 60034-30
significantly. The power range has been expanded (starting at 0,12 kW and ending at 1 000
kW). All technical constructions of electric motors are covered as long as they are rated for
on-line operation and not just three-phase, cage-induction motors as in the first edition.
The IE4 class is newly included in this standard. The informative definition of IE4, which was
previously included in IEC/TS 60034-31:2010, is therefore outdated.
The new class IE5 is not yet defined in detail but is envisaged for potential products in a
future edition of the standard.
For a given power and frame size it is generally easier to achieve a higher motor efficiency
when the motor is designed for and operated directly on-line with a 60 Hz supply frequency
rather than on 50 Hz as explained in Note 1.
NOTE 1 As the utilization and size of motors are related to torque rather than power the theoretical power of
single-speed motors increases linearly with supply frequency (and hence with speed), i.e. by 20 % from 50 Hz to
60 Hz.
I R winding-losses are dominant especially in small and medium sized induction motors. They basically remain
constant at 50 Hz and 60 Hz as long as the torque is kept constant. Although windage, friction and iron losses
increase with frequency, they play a minor role especially in motors with a number of poles of four and higher.
Therefore, at 60 Hz, the losses increase less than the 20 % power increase when compared to 50 Hz and
consequently, the efficiency is improved.
In practice, both 60 Hz and 50 Hz power designations of single-speed motors have to conform to standard power
levels in accordance with IEC 60072-1 and local standards such as EN 50347. Therefore, an increased rating of
motor power by 20 % is not always possible. However the general advantage of 60 Hz still applies when the motor
design is optimized for the respective supply frequency rather than just re-rated.
The difference in efficiency between 50 Hz and 60 Hz varies with the number of poles and the size of the motor. In
general, the 60 Hz efficiency of three-phase, cage-induction motors in the power range from 0,75 kW up to 375 kW
is between 2,5 percentage points to less than 0,5 percentage points greater when compared to the 50 Hz
efficiency. Only large 2-pole motors may experience a reduced efficiency at 60 Hz due to their high share of iron,
windage and friction losses.
It is not expected that all manufacturers will produce motors for all efficiency classes nor all
ratings of a given class.
Users should select the efficiency class in accordance with a given application depending on
the actual operating hours. It may not be energy efficient to select motors of a high efficiency
class for intermittent or short time duty due to increased inertia and start-up losses.
NOTE 2 The application guide IEC/TS 60034-31:2010 gives further information on useful applications of high-
efficient electric motors.
In order to achieve a significant market share it is essential for high-efficiency motors to meet
national/regional standards for assigned powers in relation to mechanical dimensions (such
as frame-size, flanges). There are a number of national/regional frame assignment standards
(EN 50347, JIS C 4212, NBR 17094, NEMA MG13, SANS 1804 and others) but there is no

– 6 – IEC 60034-30-1:2014 © IEC 2014
IEC standard. As this standard (IEC 60034-30-1) defines energy-efficiency classes
independent of dimensional constraints it may not be possible in all markets to produce
motors with higher efficiency classes and maintain the mechanical dimensions of the
national/regional standards.
IE codes are not limited to motors but may be used to classify other components such as
frequency converters and gearboxes.
However, it is anticipated that other components are rated with a comparable system: IE1
meaning low efficiency up to IE5 meaning the highest efficiency.
Combinations of components (such as power drive systems) will need a combined efficiency
rating. That rating should not be an IE code in order to avoid confusion. It will be defined in
other IEC standards.
The efficiency levels in this standard for 50 Hz and 60 Hz are not always entirely consistent
across all numbers of poles and over the whole power range.
NOTE 3 The efficiency levels for 60 Hz motors were assigned for compatibility with U.S. legal requirements.
NOTE 4 The efficiency levels for 50 Hz motors between 0,75 kW and 375 kW remain unchanged for compatibility
with European legal requirements.

IEC 60034-30-1:2014 © IEC 2014 – 7 –
ROTATING ELECTRICAL MACHINES –

Part 30-1: Efficiency classes of line operated AC motors (IE code)

1 Scope
This part of IEC 60034 specifies efficiency classes for single-speed electric motors that are
rated according to IEC 60034-1 or IEC 60079-0, are rated for operation on a sinusoidal
voltage supply and:
• have a rated power P from 0,12 kW to 1 000 kW;
N
• have a rated voltage U above 50 V up to 1 kV;
N
• 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 standard 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.
• are marked with any ambient temperature within the range of –20 °C to + 60 °C;
NOTE 2 The rated efficiency and efficiency classes are based on 25 °C ambient temperature according to
IEC 60034-2-1.
NOTE 3 Motors rated for temperatures outside the range – 20 °C and + 60 °C are considered to be of special
construction and are consequently excluded from this standard.
NOTE 4 Smoke extraction motors with a temperature class of up to and including 400 °C are covered by this
standard.
• 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 standard establishes a set of limit efficiency values based on frequency, number of poles
and motor power. No distinction is made between motor technologies, supply voltage or
motors with increased insulation designed specifically for converter operation even though
these motor technologies may not all be capable of reaching the higher efficiency classes
(see Table 1). This makes different motor technologies fully comparable with respect to their
energy efficiency potential.
NOTE 6 Regulators should consider the above constraints when assigning national minimum energy-efficiency
performance standards (MEPS) with respect to any particular type of motor.
The efficiency of power-drive systems is not covered by this standard. In particular, motor
losses due to harmonic content of the supply voltage, losses in cables, filters and frequency-
converters, are not covered.
Motors with flanges, feet and/or shafts with mechanical dimensions different from
IEC 60072-1 are covered by this standard.
Geared motors are covered by this standard including those incorporating non-standard
shafts and flanges.
Excluded are:
• Single-speed motors with 10 or more poles or multi-speed motors.

– 8 – IEC 60034-30-1:2014 © IEC 2014
• 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 shall: a) share
common components (apart from connectors such as bolts) with the driven unit (for
example, a shaft or housing) and; b) not be 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 standard, the process of
separation shall render the motor inoperative.
(TEAO, IC418) Totally enclosed air-over machines, i.e. totally enclosed frame-surface
cooled machines intended for exterior cooling by a ventilating means external to the
machine, are covered by this standard. Efficiency testing of such motors may 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
shall be based on the complete product (PDS : Power Drive System) and will be defined in
a separate standard.
NOTE 7 A motor is not excluded when the motor and frequency-converter can be separated and the motor
can be tested independently of the converter.
• Brake motors when the brake is an integral part of the inner motor construction and can
neither be removed nor supplied by a separate power source during the testing of motor
efficiency.
NOTE 8 Brake motors with a brake coil that is integrated into the flange of the motor are covered as long as it
is possible to test motor efficiency without the losses of the brake (for example by dismantling the brake or by
energizing the brake coil from a separate power source).
When the manufacturer offers a motor of the same design with and without a brake the
test of motor efficiency
...