IEC TS 60034-30-2:2016

Rotating electrical machines - Part 30-2: Efficiency classes of variable speed AC motors (IE-code)

IEC TS 60034-30-2:2016(E) specifies efficiency classes for variable speed rotating electric machines not covered in IEC 60034-30-1. The classification only covers machines designed for operation with sinusoidal fundamental current that are not designed to be operated direct on-line (grid), for example permanent magnet synchronous machines with and without additional reluctance torque, sinusoidal reluctance synchronous machines and synchronous machines with DC field windings.

General Information

• Status: Published
• Publication Date: 07-Dec-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: TC 2 - Rotating machinery
• Drafting Committee: WG 31 - TC 2/WG 31
• Current Stage: PPUB - Publication issued
• Start Date: 03-Jan-2017
• Completion Date: 08-Dec-2016

Standards Content (Sample)

IEC TS 60034-30-2 ®
Edition 1.0 2016-12
TECHNICAL
SPECIFICATION
Rotating electrical machines –
Part 30-2: Efficiency classes of variable speed AC motors (IE-code)

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IEC TS 60034-30-2 ®
Edition 1.0 2016-12
TECHNICAL
SPECIFICATION
Rotating electrical machines –

Part 30-2: Efficiency classes of variable speed AC motors (IE-code)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.160.01 ISBN 978-2-8322-3670-3

– 2 – IEC TS 60034-30-2:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 8
3 Terms, definitions and symbols. 8
3.1 Terms and definitions . 8
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 . 11
4.3 Tolerances . 12
4.4 Classification . 12
4.5 Nominal limits for efficiency class IE1 . 14
4.6 Nominal limits for efficiency class IE2 . 15
4.7 Nominal limits for efficiency class IE3 . 16
4.8 Nominal limits for efficiency class IE4 . 17
4.9 Nominal limits for efficiency class IE5 . 18
4.10 Interpolation of reference values at intermediate powers . 18
5 Required documentation . 20
5.1 Information on the rating plate . 20
5.2 Information in the documentation . 20
Bibliography . 22

Table 1 – IE-efficiency classification . 12
Table 2 – Reference values (%) for the calculation of IE1 nominal efficiency limits . 14
Table 3 – Reference values (%) for the calculation of IE2 nominal efficiency limits . 15
Table 4 – Reference values (%) for the calculation of IE3 nominal efficiency limits . 16
Table 5 – Reference values (%) for the calculation of IE4 nominal efficiency limits . 17
Table 6 – Reference values (%) for the calculation of IE5 nominal efficiency limits . 18
Table 7 – Interpolation coefficients for rated powers 0,12 kW up to 0,64 kW . 19
Table 8 – Interpolation coefficients for rated powers 0,65 kW up to 200 kW . 20

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 30-2: Efficiency classes of variable speed AC motors (IE-code)

FOREWORD
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• the required support cannot be obtained for the publication of an International Standard,
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• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC TS 60034-30-2, which is a technical specification, has been prepared by IEC technical
committee 2: Rotating machinery.
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 TS 60034-30-2:2016 © IEC 2016
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
2/1833/DTS 2/1850A/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
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.
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 document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

INTRODUCTION
This technical specification provides for the global harmonization of energy-efficiency classes
of variable speed electric motors. It deals with all types of AC low-voltage electric motors that
are rated for variable speed operation in their constant magnetic-flux speed-range (base
speed-range). An electronic frequency converter provides variable voltage and variable
frequency.
NOTE For the time being, IEC TS 60034-2-3, which is the testing basis of this document, is limited to induction
motors. However, the relevant input-output procedure 3-C is already applicable to all kinds of variable speed AC
motors. Future editions of IEC TS 60034-2-3 will have an expanded scope and include testing procedures for
synchronous machines.
This technical specification regards energy efficiency classification of AC motors rated for
variable voltage and frequency, namely induction motors and synchronous motors not covered
in IEC 60034-30-1. It is harmonized with the future standard IEC 61800-9-2 where
IE-classifications of frequency converters (complete drive modules = CDM) and
IES-classifications of power drive systems (PDS) are defined.
An efficient motor alone does not necessarily result in an efficient PDS. Users should select
the efficiency class in accordance with a given application depending on the actual load /
speed operating points and related operating time.
It may not be energy efficient to select very high efficiency S1 motors for intermittent or short
time duty or part load applications. The use of the Extended Product Approach (EPA) as
described in the future standard series IEC 61800-9 will help applicative sectors for
specification of energy efficiency performance of power driven equipment and parts.
It is not expected that all manufacturers
...