Rotating electrical machines - Part 11: Thermal protection

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. Applies to machines manufactured in accordance with EN 60034-12.

Drehende elektrische Maschinen - Teil 11: Thermischer Schutz

Machines électriques tournantes - Partie 11: Protection thermique

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 des graves dommages dus aux surcharges thermiques. S'applique aux machines construites en accord avec la EN 60034-12.

Električni rotacijski stroji - 11. del: Toplotna zaščita (IEC 60034-11:2004)

General Information

Status
Published
Publication Date
09-Nov-2004
Technical Committee
Drafting Committee
Parallel Committee
Current Stage
6060 - Document made available
Start Date
10-Nov-2004
Completion Date
10-Nov-2004

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SLOVENSKI STANDARD
SIST EN 60034-11:2005
01-junij-2005
(OHNWULþQLURWDFLMVNLVWURMLGHO7RSORWQD]DãþLWD ,(&
Rotating electrical machines - Part 11: Thermal protection (IEC 60034-11:2004)
Drehende elektrische Maschinen - Teil 11: Thermischer Schutz (IEC 60034-11:2004)

Machines électriques tournantes - Partie 11: Protection thermique (CEI 60034-11:2004)

Ta slovenski standard je istoveten z: EN 60034-11:2004
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST EN 60034-11:2005 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD EN 60034-11
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2004
ICS 29.160
English version
Rotating electrical machines
Part 11: Thermal protection
(IEC 60034-11:2004)
Machines électriques tournantes Drehende elektrische Maschinen
Partie 11: Protection thermique Teil 11: Thermischer Schutz
(CEI 60034-11:2004) (IEC 60034-11:2004)

This European Standard was approved by CENELEC on 2004-10-01. CENELEC members are bound to

comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and

notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech

Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,

Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60034-11:2004 E
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EN 60034-11:2004 - 2 -
Foreword

The text of document 2/1299/FDIS, future edition 2 of IEC 60034-11, prepared by IEC TC 2, Rotating

machinery, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as

EN 60034-11 on 2004-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 60034-11:2004 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 3 ----------------------
- 3 - EN 60034-11:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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 Where an international publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.
Publication Year Title EN/HD Year
IEC 60034-1 2004 Rotating electrical machines EN 60034-1 2004
Part 1: Rating and performance
IEC 60034-12 2002 Part 12: Starting performance of single- EN 60034-12 2002
speed three-phase cage induction motors
---------------------- Page: 4 ----------------------
NORME CEI
INTERNATIONALE IEC
60034-11
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2004-07
Machines électriques tournantes –
Partie 11:
Protection thermique
Rotating electrical machines –
Part 11:
Thermal protection
© IEC 2004 Droits de reproduction réservés ⎯ Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

CODE PRIX
PRICE CODE M
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International Electrotechnical Commission
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 5 ----------------------
60034-11 © IEC:2004 – 3 –
CONTENTS

FOREWORD...........................................................................................................................5

INTRODUCTION.....................................................................................................................9

1 Scope.............................................................................................................................11

2 Normative references.....................................................................................................11

3 Definitions......................................................................................................................11

4 Thermal protection limits ................................................................................................13

5 Protection against thermal overloads with slow variation ................................................13

6 Protection against thermal overloads with rapid variation................................................15

7 Restart after tripping.......................................................................................................17

8 Type Tests.....................................................................................................................17

8.1 General.................................................................................................................17

8.2 Verification of temperature due to the thermal overloads with slow variation..........17

8.3 Verification of temperature due to thermal overloads with rapid variation...............17

9 Routine tests..................................................................................................................19

Figure 1 – Example of thermal overload with slow variation and direct thermal

protection .............................................................................................................................19

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 ......................21

Figure 3 – Example of thermal overload with rapid variation where the thermally

critical part has direct thermal protection ..............................................................................23

Figure 4 – Example of thermal overload with rapid variation where the thermally

critical part has indirect thermal protection............................................................................25

Table 1 – Maximum winding temperatures for overloads with slow variation..........................15

Table 2 – Maximum winding temperatures for overloads with rapid variation.........................15

---------------------- Page: 6 ----------------------
60034-11 © IEC:2004 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 11: Thermal protection
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60034-11 has been prepared by IEC technical committee 2:

Rotating machinery.

This second edition cancels and replaces the first edition published in 1978. This edition

constitutes a technical revision and applies to machines manufactured in accordance with

IEC 60034-12.

The main change with respect to the previous edition is the reduction of the two categories of

maximum winding temperatures for overloads with slow and rapid variation to one to avoid

confusion.
---------------------- Page: 7 ----------------------
60034-11 © IEC:2004 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
2/1299/FDIS 2/1309/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until

the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in

the data related to the specific publication. At this date, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
60034-11 © IEC:2004 – 9 –
INTRODUCTION

Thermal protection systems are based on the principle of protecting or monitoring the

vulnerable machine parts against excessive temperatures. This requires the selection of the

appropriate thermal protection device to suit both the type of protection required and the

machine component to be protected. This standard does not detail the protection methods

available or specify the protection method to be used for particular applications but instead it

specifies the temperature of the protected parts that should not be exceeded if a fault or

machine abuse occurs.

The requirements are not intended to guarantee a "normal" machine life for all conditions of

use, but rather to avoid both failure and accelerated premature thermal ageing of the winding

insulation. The requirements result from a
...

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