prEN IEC 60034-30-1:2024

SLOVENSKI STANDARD
01-oktober-2024
Električni rotacijski stroji - 30-1. del: Razredi izkoristka enohitrostnih trifaznih
motorjev s kratkostično kletko (koda IE)
Rotating electrical machines - Part 30-1: Efficiency classes of line operated AC motors
(IE code)
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)
Ta slovenski standard je istoveten z: prEN IEC 60034-30-1:2024
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

2/2209/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-30-1 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-08-30 2024-11-22
SUPERSEDES DOCUMENTS:
2/2183/CD, 2/2197A/CC
TC 2 : ROTATING MACHINERY
IEC
SECRETARIAT: SECRETARY:
United Kingdom Mr Charles Whitlock
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
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TITLE:
Rotating electrical machines - Part 30-1: Efficiency classes of line operated AC motors (IE
code)
PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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IEC CDV 60034-30-1 ED2 © IEC 2024 2 2/2209/CDV

1 CONTENTS
2 FOREWORD . 3
3 INTRODUCTION . 5
4 1 Scope . 7
5 2 Normative references . 8
6 3 Terms, definitions, and symbols . 9
7 3.1 Terms and definitions . 9
8 3.2 Symbols . 9
9 4 Fields of application . 10
10 5 Efficiency . 11
11 5.1 Determination . 11
12 5.1.1 General . 11
13 5.1.2 Rated voltages, rated frequencies, and rated power . 11
14 5.1.3 Auxiliary devices . 12
15 5.2 Rating . 12
16 5.3 Classification and marking . 12
17 5.3.1 General . 12
18 5.3.2 Efficiency classification . 13
19 5.3.3 Motors below IE1 efficiency . 13
20 5.3.4 Marking . 13
21 5.4 Nominal limits for efficiency classes IE1, IE2, IE3, IE4 and IE5 . 13
22 5.4.1 Nominal efficiency limits for IE1 . 14
23 5.4.2 Nominal efficiency limits for IE2 (see Tables 5 and 6) . 16
24 5.4.3 Nominal efficiency limits for IE3 (see Tables 7 and 8) . 18
25 5.4.4 Nominal efficiency limits for IE4 (see Tables 9 and 10) . 20
26 5.4.5 Nominal efficiency limits for IE5 (see Tables 11 and 12) . 22
27 5.4.6 Interpolation of nominal efficiency limits of intermediate rated
28 output powers for 50 Hz mains supply frequency . 23
29 5.4.7 Interpolation of nominal efficiency limits of intermediate rated
30 powers for 60 Hz mains supply frequency . 25
31 Annex A (informative) Nominal, rated (declared), minimum efficiency and tolerance . 26
32 Bibliography . 27
34 Table 1 – Common motor technologies and their energy efficiency potential . 10
35 Table 2 – IE efficiency classification . 13
36 Table 3 – Nominal efficiency limits (%) for 50 Hz IE1 . 14
37 Table 4 – Nominal efficiency limits (%) for 60 Hz IE1 . 15
38 Table 5 – Nominal efficiency limits (%) for 50 Hz IE2 . 16
39 Table 6 – Nominal efficiency limits (%) for 60 Hz IE2 . 17
40 Table 7 – Nominal efficiency limits (%) for 50 Hz IE3 . 18
41 Table 8 – Nominal efficiency limits (%) for 60 Hz IE3 . 19
42 Table 9 – Nominal efficiency limits (%) for 50 Hz IE4 . 20
43 Table 10 – Nominal efficiency limits (%) for 60 Hz IE4 . 21
44 Table 11 – Nominal efficiency limits (%) for 50 Hz IE5 . 22
45 Table 12 – Nominal efficiency limits (%) for 60 Hz IE5 . 23
46 Table 13 – Interpolation coefficients for 0,12 kW up to 0,55 kW . 23
47 Table 14 – Interpolation coefficients for 0,75 kW up to 200 kW . 25
IEC CDV 60034-30-1 ED2 © IEC 2024 3 2/2209/CDV

49 INTERNATIONAL ELECTROTECHNICAL COMMISSION
50 ____________
52 ROTATING ELECTRICAL MACHINES –
54 Part 30-1: Efficiency classes of line operated AC motors (IE code)
56 FOREWORD
57 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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84 Publications.
85 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
86 indispensable for the correct application of this publication.
87 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
88 rights. IEC shall not be held responsible for identifying any or all such patent rights.
89 International Standard IEC 60034-30-1 has been prepared by IEC Technical Committee 2:
90 Rotating machinery.
91 This second edition of IEC 60034-30-1 cancels and replaces the first edition of IEC 60034-30-
92 1 (2014).
93 The text of this standard is based on the following documents:
FDIS Report on voting
95 Full information on the voting for the approval of this standard can be found in the report on
96 voting indicated in the above table.
97 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
98 NOTE A table of cross-references of all IEC TC 2 publications can be found on the IEC TC 2 dashboard on the IEC
99 website.
IEC CDV 60034-30-1 ED2 © IEC 2024 4 2/2209/CDV

100 The committee has decided that the contents of this publication will remain unchanged until the
101 stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
102 the specific publication. At this date, the publication will be
103 • reconfirmed,
104 • withdrawn,
105 • replaced by a revised edition, or
106 • amended.
IEC CDV 60034-30-1 ED2 © IEC 2024 5 2/2209/CDV

109 INTRODUCTION
110 This first part of the IEC standard series, 60034-30, provides for the global harmonization of
111 energy-efficiency classes of electric motors. It deals with all kinds of electric motors that are
112 rated for line operation (including starting at reduced voltage). This includes 50 Hz and/or 60
113 Hz single- and three-phase low voltage induction motors, regardless of their rated voltage, as
114 well as line-start synchronous motors.
115 The second part of this standard series (IEC 60034-30-2) is prepared for motors rated for
116 variable voltage and frequency supply.
117 This second edition of the first part introduces a new efficiency class, IE5. It should be noted
118 that IE class definition is generally independent of the output power – frame size assignment.
119 As standardized dimensions and outputs in the standard IEC 60072 is based on today’s
120 technology (up to IE4), it may be challenging to implement highest IE classes according to IEC
121 60072 standardized frame sizes.
122 Especially motors with lower output power ratings may need to be designed and manufactured
123 in one frame size bigger than frame size assigned in IEC 60072-1 to reach IE4 and IE5 efficiency
124 levels.
125 For a given power and frame size it is generally easier to achieve a higher motor efficiency
126 when the motor is designed for and operated directly on-line with a 60 Hz supply frequency
127 rather than on 50 Hz as explained in Note 1.
128 NOTE 1 As the utilization and size of motors are related to torque rather than power the theoretical power of single-
129 speed motors increases linearly with supply frequency (and hence with speed), i.e. by 20 % from 50 Hz to 60 Hz.
130 I R winding-losses are dominant especially in small and medium sized induction motors. They basical
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