SIST EN 60027-4:2008

SLOVENSKI STANDARD
SIST EN 60027-4:2008
01-januar-2008
1DGRPHãþD
SIST HD 245.4 S1:2004
ýUNRYQLVLPEROL]DXSRUDERYHOHNWURWHKQRORJLMLGHO(OHNWULþQLURWDFLMVNLVWURML
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Letter symbols to be used in electrical technology -- Part 4: Rotating electric machines
Formelzeichen für die Elektrotechnik -- Teil 4: Drehende elektrische Maschinen
Symboles littéraux à utiliser en électrotechnique -- Partie 4: Machines électriques
tournantes
Ta slovenski standard je istoveten z: EN 60027-4:2007
ICS:
01.075 Simboli za znake Character symbols
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST EN 60027-4:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60027-4:2008

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SIST EN 60027-4:2008


EUROPEAN STANDARD
EN 60027-4

NORME EUROPÉENNE
October 2007
EUROPÄISCHE NORM

ICS 01.060 Supersedes HD 245.4 S1:1987


English version


Letter symbols to be used in electric technology -
Part 4: Rotating electric machines
(IEC 60027-4:2006)


Symboles littéraux  Formelzeichen für die Elektrotechnik -
à utiliser en électrotechnique - Teil 4: Drehende elektrische Maschinen
Partie 4: Machines électriques tournantes (IEC 60027-4:2006)
(CEI 60027-4:2006)




This European Standard was approved by CENELEC on 2007-10-01. 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, Bulgaria, 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


© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60027-4:2007 E

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SIST EN 60027-4:2008
EN 60027-4:2007 - 2 -
Foreword
The text of document 25/330/FDIS, future edition 2 of IEC 60027-4, prepared by IEC TC 25, Quantities
and units, and their letter symbols, was submitted to the IEC-CENELEC parallel vote and was approved
by CENELEC as EN 60027-4 on 2007-10-01.
This European Standard supersedes HD 245.4 S1:1987.
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) 2008-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60027-4:2006 was approved by CENELEC as a European
Standard without any modification.
__________

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SIST EN 60027-4:2008
- 3 - EN 60027-4:2007

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)
IEC 60027-1 1992 Letter symbols to be used in electrical EN 60027-1 2006
technology -
Part 1: General


IEC 60034-1 2004 Rotating electrical machines - EN 60034-1 2004
Part 1: Rating and performance


2)
IEC 60034-2 1972 Rotating electrical machines - EN 60034-2 1996
Part 2: Methods for determining losses and
efficiency of rotating electrical machinery from
tests (excluding machines for traction
vehicles)


IEC 60034-4 (mod) 1985 Rotating electrical machines - EN 60034-4 1995
Part 4: Methods for determining synchronous
machine quantities from tests


IEC 60034-9 (mod) 2003 Rotating electrical machines - EN 60034-9 2005
Part 9: Noise limits


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


IEC/TS 60034-17 2002 Rotating electrical machines -
+ corr. June 2002 Part 17: Cage induction motors when fed
+ corr. April 2003 from converters - Application guide CLC/TS 60034-17 2004


IEC/TS 60034-20-1 2002 Rotating electrical machines - CLC/TS 60034-20-1 2004
Part 20-1: Control motors - Stepping motors


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



1)
EN 60027-1 is based on IEC 60027-1:1995 (Reprint) + A1:1997.
2)
EN 60034-2 includes supplement A:1974 to IEC 60034-2.

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SIST EN 60027-4:2008
EN 60027-4:2007 - 4 -
Publication Year Title EN/HD Year
IEC 60050-101 1998 International Electrotechnical Vocabulary – –
(IEV) -
Part 101: Mathematics


IEC 60050-111 1996 International Electrotechnical Vocabulary – –
(IEV) -
Chapter 111: Physics and chemistry


IEC 60050-121 1998 International Electrotechnical Vocabulary – –
(IEV) -
Part 121: Electromagnetism


IEC 60050-131 2002 International Electrotechnical Vocabulary – –
(IEV) -
Part 131: Circuit theory


IEC 60050-151 2001 International Electrotechnical Vocabulary – –
(IEV) -
Part 151: Electrical and magnetic devices


IEC 60050-411 1996 International Electrotechnical Vocabulary – –
(IEV) -
Chapter 411: Rotating machinery


IEC 61986 2002 Rotating electrical machines - Equivalent EN 61986 2002
loading and super-position techniques -
Indirect testing to determine temperature rise

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SIST EN 60027-4:2008
NORME CEI
INTERNATIONALE
IEC



60027-4
INTERNATIONAL


Deuxième édition
STANDARD

Second edition

2006-12


Symboles littéraux à utiliser en électrotechnique –
Partie 4:
Machines électriques tournantes

Letter symbols to be used in
electrical technology –
Part 4:
Rotating electric machines
© 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
CODE PRIX
S
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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SIST EN 60027-4:2008
60027-4 © IEC:2006 – 3 –
CONTENTS
FOREWORD.5

1 Scope.9
2 Normative references .9
3 Currents and related quantities.13
4 Voltages and related quantities .15
5 Powers and related quantities.17
6 Resistances, reactances and impedances .21
7 Times and frequencies .23
8 Geometrical quantities.27
9 Factors and ratios .29
10 Mechanical quantities .31
11 Thermal quantities.35
12 Acoustics and vibrations.37
13 Measurement evaluation.37
14 Subscripts .39

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SIST EN 60027-4:2008
60027-4 © IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

LETTER SYMBOLS TO BE USED IN
ELECTRICAL TECHNOLOGY –

Part 4: Rotating electric machines


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 60027-4 has been prepared by IEC technical committee 25:
Quantities and units and their symbols.
This second edition cancels and replaces the first edition published in 1985 and constitutes a
technical revision.
This edition is a complete revision of the previous edition of IEC 60027-4.
The text of this standard is based on the following documents:
FDIS Report on voting
25/330/FDIS 25/340/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.

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SIST EN 60027-4:2008
60027-4 © IEC:2006 – 7 –
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all the parts of the IEC 60027 series, under the general title Letter symbols to be
used in electrical technology, can be found on the IEC website.
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.

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SIST EN 60027-4:2008
60027-4 © IEC:2006 – 9 –
LETTER SYMBOLS TO BE USED IN
ELECTRICAL TECHNOLOGY –

Part 4: Rotating electric machines



1 Scope
This part of IEC 60027 is applicable to rotating electric machines. It gives names and symbols
for quantities and units.
2 Normative references
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.
IEC 60027-1:1992, Letter symbols to be used in electrical technology – Part 1: General
IEC 60034-1:2004, Rotating electrical machines – Part 1: Rating and performance
IEC 60034-2:1972, Rotating electrical machines – Part 2: Methods for determining losses and
efficiency of rotating electrical machinery from tests (excluding machines for traction vehicles)
IEC 60034-4:1985, Rotating electrical machines – Part 4: Methods for determining
synchronous machine quantities from tests
IEC 60034-9:2003, Rotating electrical machines – Part 9: Noise limits
IEC 60034-12:2002, Rotating electrical machines – Part 12: Starting performance of single-
speed three-phase cage induction motors
IEC 60034-17:2002, Rotating electrical machines – Part 17: Cage induction motors when fed
from converters – Application guide
IEC 60034-20-1:2002, Rotating electrical machines – Part 20-1: Control motors – Stepping
motors
IEC 60034-26:2006, Rotating electrical machines – Part 26: Effects of unbalanced voltages on
the performance of three-phase cage induction motors
IEC 60050-101:1998, International Electrotechnical Vocabulary (IEV) – Part 101: Mathematics
IEC 60050-111:1996, International Electrotechnical Vocabulary (IEV) – Part 111: Physics and
chemistry
IEC 60050-121:1998, International Electrotechnical Vocabulary (IEV) – Part 121: Electro-
magnetism

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SIST EN 60027-4:2008
60027-4 © IEC:2006 – 11 –
IEC 60050-131:2002, International Electrotechnical Vocabulary (IEV) – Part 131: Circuit
theory
IEC 60050-151:2001, Interna
...