IEC 60034-30-3:2024

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)
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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

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

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

FOREWORD
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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.
...