FprEN IEC 60034-11:2020

Rotating electrical machines - Part 11: Thermal protection

IEC 60034-11:2020 is available as IEC 60034-11:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60034-11:2020 specifies requirements relating to the use of thermal protectors and thermal detectors incorporated into the stator windings or placed in other suitable positions in induction machines in order to protect them against serious damage due to thermal overloads. It applies to single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034-1 and IEC 60034-12 that: - have a rated voltage up to 1 000 V; - are intended for direct-on-line or star-delta starting. The main changes with respect to the previous edition are: - the additional specification of winding temperature limits for temperature class 200 (N), - the increased limits of maximum winding temperatures for overloads with rapid variation, - the clarification that the motor winding may be permanently damaged after it has been exposed to temperatures - a clarification of the definition of indirect thermal protection, - a clarification on the test methods for larger motors.

Drehende elektrische Maschinen - Teil 11: Thermischer Schutz

Machines électriques tournantes - Partie 11: Protection thermique

IEC 60034-11:2020 est disponible sous forme de IEC 60034-11:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60034-11:2020 spécifie les exigences relatives à l’utilisation de protecteurs et détecteurs thermiques incorporés dans les enroulements statoriques, ou autres emplacements adaptés, dans les machines à induction afin de les protéger contre de graves dommages dus aux surcharges thermiques. Elle s’applique aux moteurs triphasés à induction à cage à une seule vitesse fonctionnant à 50 Hz ou 60 Hz conformément à l’IEC 60034-1 et à l’IEC 60034-12 qui: - ont une tension assignée jusqu’à 1 000 V; - sont prévus pour un démarrage direct ou étoile-triangle. Par rapport à l’édition précédente, les modifications majeures sont les suivantes - spécification supplémentaire relative aux limites de température de l’enroulement pour la classe thermique 200 (N), - augmentation des limites des températures maximales d’enroulement pour surcharges à évolution rapide, - précision concernant l’enroulement du moteur qui peut être endommagé de façon permanente après une exposition aux températures, - précision de la définition de protection thermique indirecte, - précision, au 8.3, concernant les méthodes d’essai pour les moteurs plus importants.

Električni rotacijski stroji - 11. del: Toplotna zaščita

General Information

• Status: Not Published
• Publication Date: 22-Nov-2020
• Withdrawal Date: 23-May-2021
• ICS: 29.160 - Rotating machinery
• Technical Committee: CLC/TC 2 - Rotating machinery
• Drafting Committee: IEC/TC 2 - IEC_TC_2
• Current Stage: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 21-Aug-2020
• Completion Date: 21-Aug-2020
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: kSIST FprEN IEC 60034-11:2020 - Rotating electrical machines - Part 11: Thermal protection

Relations

• Revises: EN 60034-11:2004 - Rotating electrical machines - Part 11: Thermal protection
• Effective Date: 18-Dec-2018

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 60034-11:2020
01-april-2020
Električni rotacijski stroji - 11. del: Toplotna zaščita
Rotating electrical machines - Part 11: Thermal protection
Drehende elektrische Maschinen - Teil 11: Thermischer Schutz
Machines électriques tournantes - Partie 11: Protection thermique
Ta slovenski standard je istoveten z: prEN IEC 60034-11:2020
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
oSIST prEN IEC 60034-11:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 60034-11:2020

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oSIST prEN IEC 60034-11:2020
2/1979/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-11 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2020-01-31 2020-04-24
SUPERSEDES DOCUMENTS:
2/1959/CD,2/1978/CC

IEC TC 2 : ROTATING MACHINERY
SECRETARIAT: SECRETARY:
United Kingdom Mr Charles Whitlock
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:


Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

TITLE:
Rotating electrical machines – Part 11: Thermal protection

PROPOSED STABILITY DATE: 2023

NOTE FROM TC/SC OFFICERS:


Copyright © 2019 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

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oSIST prEN IEC 60034-11:2020
– 2 – IEC CDV 60034-11 © IEC 2020
CONTENTS

FOREWORD . 3
INTRODUCTION . 5

1 Scope . 6
2 Normative references . 6
3 Definitions . 6
4 Thermal protection limits . 7
5 Protection against thermal overloads with slow variation . 7
6 Protection against thermal overloads with rapid variation. 8
7 Restart after tripping . 8
8 Type Tests . 9
8.1 General . 9
8.2 Verification of temperature due to the thermal overloads with slow variation. . 9
8.3 Verification of temperature due to thermal overloads with rapid variation. . 9
9 Routine tests . 10

Figure 1 – Example of thermal overload with slow variation and direct thermal
protection . 10
Figure 2 – Example of thermal overload with slow variation in the case of too intensive
intermittent periodic duty with starting (duty S4) and direct thermal protection . 11
Figure 3 – Example of thermal overload with rapid variation where the thermally
critical part has direct thermal protection .
...