SIST EN 60034-26:2007

SLOVENSKI STANDARD
SIST EN 60034-26:2007
01-marec-2007
1DGRPHãþD
SIST-TS CLC/TS 60034-26:2005
(OHNWULþQLURWDFLMVNLVWURMLGHO8þLQNRYDQMHQHVLPHWULþQLKQDSHWRVWLQD
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Rotating electrical machines - Part 26: Effects of unbalanced voltages on the
performance of three-phase cage induction motors (IEC 60034-26:2006)
Drehende elektrische Maschinen - Teil 26: Auswirkungen von Spannungsunsymmetrien
auf das Betriebsverhalten von Drehstrom-Induktionsmotoren (IEC 60034-26:2006)
Machines électriques tournantes - Partie 26: Effets d'un système de tensions
déséquilibrées sur les caractéristiques de fonctionnement des moteurs à cage
asynchrones triphasés (CEI 60034-26:2006)
Ta slovenski standard je istoveten z: EN 60034-26:2006
ICS:
29.160.30 Motorji Motors
SIST EN 60034-26:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60034-26:2007

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SIST EN 60034-26:2007


EUROPEAN STANDARD
EN 60034-26

NORME EUROPÉENNE
November 2006
EUROPÄISCHE NORM

ICS 29.160 Supersedes CLC/TS 60034-26:2004


English version


Rotating electrical machines
Part 26: Effects of unbalanced voltages on the performance
of three-phase cage induction motors
(IEC 60034-26:2006)


Machines électriques tournantes Drehende elektrische Maschinen
Partie 26: Effets d'un système de tensions Teil 26: Auswirkungen
déséquilibrées sur les caractéristiques von Spannungsunsymmetrien
de fonctionnement des moteurs auf das Betriebsverhalten
à cage asynchrones triphasés von Drehstrom-Induktionsmotoren
(CEI 60034-26:2006) (IEC 60034-26:2006)




This European Standard was approved by CENELEC on 2006-11-01. 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, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the 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


© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60034-26:2006 E

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SIST EN 60034-26:2007
EN 60034-26:2006 - 2 -
Foreword
The text of document 2/1391/FDIS, future edition 1 of IEC 60034-26, prepared by IEC TC 2, Rotating
machinery, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60034-26 on 2006-11-01.
This European Standard supersedes CLC/TS 60034-26:2004.
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) 2007-08-01
– latest date by which the national standards conflicting
(dow) 2009-11-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60034-26:2006 was approved by CENELEC as a European
Standard without any modification.
__________

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SIST EN 60034-26:2007
- 3 - EN 60034-26:2006

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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

1) 2)
IEC 60034-12 - Rotating electrical machines EN 60034-12 2002
Part 12: Starting performance of single-speed
three-phase cage induction motors




1)
Undated reference.
2)
Valid edition at date of issue.

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SIST EN 60034-26:2007

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SIST EN 60034-26:2007
NORME CEI
INTERNATIONALE
IEC



60034-26
INTERNATIONAL


Première édition
STANDARD

First edition

2006-07


Machines électriques tournantes –
Partie 26:
Effets d’un système de tensions déséquilibrées
sur les caractéristiques de fonctionnement des
moteurs à cage asynchrones triphasés

Rotating electrical machines –
Part 26:
Effects of unbalanced voltages on the performance
of three-phase cage induction motors
 IEC 2006 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
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Pour prix, voir catalogue en vigueur
For price, see current catalogue

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SIST EN 60034-26:2007
60034-26  IEC:2006 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9

1 Scope.11
2 Normative references .11
3 Effects of unbalanced voltages on performance.11
3.1 Currents .11
3.2 Heating .11
3.3 Torques.13
3.4 Full-load speed .13
4 Derating of motor to prevent overheating.13

Annex A (informative) Determination of the symmetrical components of the line-to-line
voltages U , U , U of a three-phase system .17
1 2 3
Annex B (informative) Approximate determination.21

Figure 1 – Typical values of derating of design N, three-phase cage induction motors
within the scope of IEC 60034-12 .15
Figure A.1 – Phasor diagram .17

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SIST EN 60034-26:2007
60034-26  IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ROTATING ELECTRICAL MACHINES –

Part 26: Effects of unbalanced voltages on the performance
of three-phase cage induction motors


FOREWORD
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