SIST-TS CLC IEC/TS 60034-31:2024

SLOVENSKI STANDARD
01-november-2024
Električni rotacijski stroji - 31. del: Izbiranje energijsko učinkovitih motorjev
vključno z motorji s spremenljivo hitrostjo - Smernice za uporabo (IEC/TS 60034-
31:2021)
Rotating electrical machines - Part 31: Selection of energye-fficient motors including
variable speed applications - Application guidelines (IEC/TS 60034-31:2021)
Drehende elektrische Maschinen - Teil 31: Auswahl von Energiesparmotoren
einschließlich Drehzahlstellantrieben - Anwendungsleitfaden (IEC/TS 60034-31:2021)
Machines électriques tournantes - Partie 31: Choix des moteurs écoénergétiques
incluant les applications à vitesse variable - Lignes directrices en matière d’application
(IEC/TS 60034-31:2021)
Ta slovenski standard je istoveten z: CLC IEC/TS 60034-31:2024
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION CLC IEC/TS 60034-31

SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION January 2024
ICS 29.160.01 Supersedes CLC/TS 60034-31:2011
English Version
Rotating electrical machines - Part 31: Selection of energy-
efficient motors including variable speed applications -
Application guidelines
(IEC/TS 60034-31:2021)
Machines électriques tournantes - Partie 31: Choix des Drehende elektrische Maschinen - Teil 31: Auswahl von
moteurs écoénergétiques incluant les applications à vitesse Energiesparmotoren einschließlich Drehzahlstellantrieben -
variable - Lignes directrices en matière d'application Anwendungsleitfaden
(IEC/TS 60034-31:2021) (IEC/TS 60034-31:2021)
This Technical Specification was approved by CENELEC on 2024-01-03.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
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. CLC IEC/TS 60034-31:2024 E

European foreword
This document (CLC IEC/TS 60034-31:2024) consists of the text of IEC/TS 60034-31:2021 prepared
by IEC/TC 2 “Rotating machinery”.
This document supersedes CLC/TS 60034-31:2011.
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 Technical Specification IEC/TS 60034-31:2021 was approved by
CENELEC as a European Technical Specification without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard
indicated:
IEC 60034-26 NOTE Approved as EN 60034-26
IEC/TS 60034-25 NOTE Approved as CLC/TS 60034-25
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 - Rotating electrical machines – Part 1: EN 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 60034-2-3 2020 Rotating electrical machines - Part 2–3: EN IEC 60034-2-3 2020
Specific test methods for determining
losses and efficiency of converter-fed AC
motors
IEC 60034-12 - Rotating electrical machines - Part 12: EN 60034-12 -
Starting performance of single-speed
three-phase cage induction motors
IEC 60034-30-1 - Rotating electrical machines - Part 30–1: EN 60034-30-1 -
Efficiency classes of line operated AC
motors (IE code)
IEC 60072 series Rotating electrical machines - Dimensions EN IEC 60072 series
and output series
IEC 61800-9-1 - Adjustable speed electrical power drive EN 61800-9-1 -
systems - Part 9–1: Ecodesign for power
drive systems, motor starters, power
electronics and their driven applications -
General requirements for setting energy
efficiency standards for power driven
equipment using the extended product
approach (EPA) and semi analytic model
(SAM)
A new edition is currently under preparation. Stage of this document at the time of publication: prEN IEC 60034.
Publication Year Title EN/HD Year
IEC 61800-9-2 2017 Adjustable speed electrical power drive EN 61800-9-2 2017
systems - Part 9–2: Ecodesign for power
drive systems, motor starters, power
electronics and their driven applications -
Energy efficiency indicators for power
drive systems and motor starters
IEC/TS 60034-30-2 - Rotating electrical machines - Part 30–2: CLC IEC/TS 60034-30-2 -
Efficiency classes of variable speed AC
motors (IE-code)
IEC TS 60034-31 ®
Edition 2.0 2021-03
TECHNICAL
SPECIFICATION
colour
inside
Rotating electrical machines –

Part 31: Selection of energy-efficient motors including variable speed

applications – Application guidelines

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.160.01 ISBN 978-2-8322-9511-3

– 2 – IEC TS 60034-31:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, symbols and acronyms . 10
3.1 Terms and definitions . 10
3.2 Symbols . 10
3.3 Acronyms . 10
4 Background . 11
4.1 General . 11
4.2 Introduction to IEC standards . 14
4.2.1 Overview . 14
4.2.2 Scope of efficiency classification . 16
4.2.3 Efficiency interpolation (IEC 60034-2-3) . 16
5 Applications . 18
5.1 Applications where the motor is fully loaded over longer periods of time . 18
5.2 Applications with square torque-speed characteristic (pumps, fans,
compressors) . 18
5.2.1 General . 18
5.2.2 Throttling versus variable speed control of pump systems . 19
5.2.3 On/off flow control of pump systems . 20
5.2.4 Pump systems for variable flow and their energy saving potential . 20
5.2.5 Summary for fan system design . 21
5.3 Applications with a constant torque characteristic (conveyors, lifts, hoist
drives) . 21
5.3.1 General . 21
5.3.2 Conveyors with constant speed versus variable speed control . 21
6 Fundamentals of electrical machines . 22
6.1 General . 22
6.2 Technology . 23
6.2.1 Technologies for fixed speed, line start motors . 23
6.2.2 Technologies for Variable Frequency Drive motors . 23
6.3 Efficiency . 23
6.3.1 General . 23
6.3.2 Motor losses . 25
6.3.3 Motors for higher efficiency classes . 25
6.3.4 Variations in motor losses . 26
6.4 Power factor . 26
6.5 Pole number, frequency and speed relations . 27
6.6 Differences between constant speed and variable speed operations . 27
7 Motors for constant speed operation . 28
7.1 General . 28
7.2 Motors rated for 50 Hz and 60 Hz . 28
7.3 Starting performance . 29
7.4 Operating speed and slip . 30
7.5 Motor losses for variable load . 30
7.6 Power factor . 31

IEC TS 60034-31:2021 © IEC 2021 – 3 –
7.7 Partial load efficiency . 32
7.8 Motors rated for different voltages or a voltage range . 33
7.9 Soft starters . 33
7.10 IE efficiency classes . 33
7.11 Efficiency testing methods . 33
7.12 Effects of power supply and ambient temperature variations . 34
7.12.1 Effects of power quality and variations in voltage and frequency . 34
7.12.2 Effects of voltage unbalance . 34
7.12.3 Effects of ambient temperature . 34
7.12.4 Voltages variations . 35
7.13 Motor dimensioning . 35
8 Motors for variable speed operation . 35
8.1 General . 35
8.2 Motors rated for arbitrary speeds .
...