SIST EN IEC 60034-30-3:2024

SLOVENSKI STANDARD
01-oktober-2024
Električni rotacijski stroji - 30-3. del: Razredi učinkovitosti visokonapetostnih AC
motorjev (oznaka IE) (IEC 60034-30-3:2024)
Rotating electrical machines - Part 30-3: Efficiency classes of high voltage AC motors
(IE-code) (IEC 60034-30-3:2024)
Drehende elektrische Maschinen – Teil 30-3: Wirkungsgradklassen von
Hochspannungs-Wechselstrommotoren (IE-Code) (IEC 60034-30-3:2024)
Machines électriques tournantes - Partie 30-3: Classes de rendement des moteurs à
courant alternatif à haute tension (code IE) (IEC 60034-30-3:2024)
Ta slovenski standard je istoveten z: EN IEC 60034-30-3:2024
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60034-30-3

NORME EUROPÉENNE
EUROPÄISCHE NORM March 2024
ICS 29.160.01; 29.160.10; 29.160.30

English Version
Rotating electrical machines - Part 30-3: Efficiency classes of
high voltage AC motors (IE-code)
(IEC 60034-30-3:2024)
Machines électriques tournantes - Partie 30-3: Classes de Drehende elektrische Maschinen - Teil 30-3:
rendement des moteurs à courant alternatif à haute tension Wirkungsgradklassen von Hochspannungs-
(code IE) Wechselstrommotoren (IE-Code)
(IEC 60034-30-3:2024) (IEC 60034-30-3:2024)
This European Standard was approved by CENELEC on 2024-03-21. 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.
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Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60034-30-3:2024 E

European foreword
The text of document 2/2131/CDV, future edition 1 of IEC 60034-30-3, prepared by IEC/TC 2
"Rotating machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC
as EN IEC 60034-30-3:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-12-21
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-03-21
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60034-30-3:2024 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 standard indicated:
IEC 60034-5 NOTE Approved as EN IEC 60034-5
IEC 60034-6 NOTE Approved as EN 60034-6
IEC/TS 60034-31 NOTE Approved as CLC IEC/TS 60034-31
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where 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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-1 2022 Rotating electrical machines - Part 1: EN IEC 60034-1 —
Rating and performance
IEC 60034-2-1 - Rotating electrical machines - Part 2-1: EN 60034-2-1 -
Standard methods for determining losses
and efficiency from tests (excluding
machines for traction vehicles)
IEC 60050-411 1996 International Electrotechnical Vocabulary - - -
Chapter 411: Rotating machinery
+ A1 2007  - -
+ A2 2021  - -
Under preparation. Stage at the time of publication: FprEN IEC 60034-1:2021.
IEC 60034-30-3 ®
Edition 1.0 2024-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –

Part 30-3: Efficiency classes of high voltage AC motors (IE-code)

Machines électriques tournantes –

Partie 30-3: Classes de rendement des moteurs à courant alternatif à haute

tension (code IE)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS  29.160.01; 29.160.10; 29.160.30 ISBN 978-2-8322-8126-0

– 2 – IEC 60034-30-3:2024 © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 9
3 Terms, definitions and symbols. 9
3.1 Terms and definitions . 9
3.2 Symbols . 10
4 Efficiency classification . 10
4.1 Determination . 10
4.1.1 General . 10
4.1.2 Auxiliary devices . 10
4.2 Efficiency rating – General procedure . 11
5 Required documentation . 18
Annex A (informative) Standardized nameplate efficiency values . 19
Annex B (informative) Proposal for technology factor for starting conditions for high
voltage cage induction motors outside the scope of this document . 20
Annex C (informative) Example for determining the nominal efficiency . 21
Bibliography . 22

Figure 1 – Envelope of the load torque during starting: Load torque during starting in %
of rated torque over speed in % of rated speed . 7

Table 1 – Maximum external moment of inertia . 8
Table 2 – Reference efficiency values η for 2p = 2, f = 50 Hz . 11
r N
Table 3 – Reference efficiency values η for 2p = 4, f = 50 Hz . 12
r N
Table 4 – Reference efficiency values η for 2p = 6, f = 50 Hz . 13
r N
Table 5 – Reference efficiency values η for 2p = 2, f = 60 Hz . 14
r N
Table 6 – Reference efficiency values η for 2p = 4, f = 60 Hz . 15
r N
Table 7 – Reference efficiency values η for 2p = 6, f = 60 Hz . 16
r N
Table 8 – Technology factor c for rated voltage U . 17
u N
Table 9 – Technology factor c for method of cooling (IC class) . 17
c
Table 10 – Technology factor c for starting conditions for motors within the scope of
s
this document . 17
Table A.1 – Standardized nameplate efficiency levels . 19
Table B.1 – Technology factor c for starting conditions for high voltage cage induction
s
motors outside the scope of this document . 20

IEC 60034-30-3:2024 © IEC 2024 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 30-3: Efficiency classes of high voltage 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
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60034-30-3 has been prepared by IEC technical committee 2: Rotating machinery. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
2/2131/CDV 2/2160/RVC
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 is English.

– 4 – IEC 60034-30-3:2024 © IEC 2024
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.
A list of all parts in the IEC 60034 series, published under the general title Rotating electrical
machines, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

IEC 60034-30-3:2024 © IEC 2024 – 5 –
INTRODUCTION
This document provides the global harmonization of energy-efficiency classes of three-phase
cage induction motors with rated voltage above 1 000 V that are rated for direct online starting
and fixed-speed operation at a 50 Hz or 60 Hz supply with sinusoidal voltage.
For these motors, the demands of the power supply and of the driven equipment in many cases
govern the design of the electrical machine. Due to the large size and power of high-voltage
(HV) motors, these demands are more complex than for low-voltage motors and often limit the
design. Vice versa, the properties of the electrical machine itself influence the grid considerably
in many cases.
In order to ensure an easy applicability of this document, the scope is limited to the most
relevant applications, i.e. motors for driving the vast majority of pumps, fans, or compressors,
which cover approximately 80 % to 90 % of all applications. Motors for special applications, e.g.
for accelerating very high load inertia, for very low supply voltage during starting, for very low
locked-rotor current or for accelerating against high load torque, are therefore out of the scope
of this document.
Despite this, the motor technology, namely
• rated voltage,
• method of cooling,
• locked-rotor current,
have a significant influence on the achievable motor efficiency as well as the rated frequency,
the rated power and the number of poles, and are considered when specifying the efficiency
class.
NOTE When specifying or designing a power drive system, low voltage motors will mostly have a higher efficiency
than high voltage motors with the same rated power. However, considering the losses of the complete system, i.e.
including cabling and transformer losses, high voltage solution might be advantageous.

– 6 – IEC 60034-30-3:2024 © IEC 2024
ROTATING ELECTRICAL MACHINES –

Part 30-3: Efficiency classes of high voltage AC motors (IE-code)

1 Scope
This part of IEC 60034 specifies efficiency classes for fixed-speed three-phase high-voltage
cage induction motors in accordance with IEC 60034-1 that
• have a rated voltage exceeding 1 000 V, but not exceeding 11 kV;
• have a rated power from 200 kW to 2 000 kW;
NOTE 1 Motors with rated power above 2 000 kW are produced in such small numbers and are designed and
produced with a focus on achieving an optimum efficiency anyway, even though fulfilling increasingly special
requirements that assigning efficiency classes would be an additional effort without the result of any countable
energy saving.
• have two, four or six poles;
• are rated for single-speed line-operation;
• are intended for direct-on-line starting at rated or at reduced voltage and rated frequency;
• are constructed to any degree of protection;
• are designed for cooling methods IC411, IC511, IC611, IC01 or IC81W;
• are capable of continuous operation at their rated operating point (torque/power, speed)
with a temperature rise within the specified insulation temperature class;
NOTE 2 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.
• are rated for any ambient temperature or coolant temperature within the range of – 20 °C to
+ 60 °C;
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 document.
• are rated for an operating altitude up to 2 000 m above sea level;
NOTE 4 The rated efficiency and the efficiency class are based on a rating for altitudes up to 1 000 m above
sea level.
• have a locked-rotor current I at stand-still and supply with rated voltage and frequency
l
before application of any IEC or agreed tolerance in the range I / I ≥ 4,5;
l N
• are designed for a customer load torque during starting not exceeding an envelope with a
minimum of 25 % of the rated torque at low speed and a square shape T ~ n up to a
maximum load torque at full speed of 60 % of the rated torque in case of 2 pole motors or
100 % of the rated torque in case of 4 pole or 6 pole motors, respectively, (see Figure 1),
After starting is completed, the load torque of 2 pole motors is increased to 100 % of the
rated torque;
• have to accelerate an external moment of inertia as defined by the customer requirements
not exceeding the values given in Table 1 considering all start up conditions defined in this
document for not more than three consecutive starts from cold condition or two starts from
hot condition, respectively;
• are designed for a minimum locked-rotor steady state supply voltage of at least 80 % of the
rated voltage during starting.

IEC 60034-30-3:2024 © IEC 2024 – 7 –

Figure 1 – Envelope of the load torque during starting:
Load torque during starting in % of rated torque over speed in % of rated speed

– 8 – IEC 60034-30-3:2024 © IEC 2024
Table 1 – Maximum external moment of inertia
Number of poles 2 4 6
Fr
...