EN IEC 60152:2021

SLOVENSKI STANDARD
01-november-2021
Označevanje faznih vodnikov po časovnih indeksih (po urah) trifaznih omrežij z
izmeničnim tokom (IEC 60152:2021)
Designation of phase differences by hour numbers in three-phase AC systems (IEC
60152:2021)
Kennzeichnung der Phasenleiter in einem elektrischen Dreiphasensystem durch
Uhrziffern (IEC 60152:2021)
Désignation des déphasages par indices horaires des réseaux en courant alternatif
triphasés (IEC 60152:2021)
Ta slovenski standard je istoveten z: EN IEC 60152:2021
ICS:
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60152

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 29.020
English Version
Designation of phase differences by hour numbers in three-
phase AC systems
(IEC 60152:2021)
Désignation des déphasages par indices horaires des Kennzeichnung der Phasenleiter in einem elektrischen
réseaux en courant alternatif triphasés Dreiphasensystem durch Uhrziffern
(IEC 60152:2021) (IEC 60152:2021)
This European Standard was approved by CENELEC on 2021-08-13. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
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,
Turkey 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60152:2021 E
European foreword
The text of document 3/1490/FDIS, future edition 2 of IEC 60152, prepared by IEC/TC 3
“Documentation, graphical symbols and representations of technical information” was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60152:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–05–13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–08–13
document have to be withdrawn
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 Standard IEC 60152:2021 was approved by CENELEC as a European
Standard without any modification.

IEC 60152 ®
Edition 2.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL PUBLICATION
PUBLICATION HORIZONTALE
Designation of phase differences by hour numbers in three-phase AC systems

Désignation des déphasages par indices horaires des réseaux en courant

alternatif triphasés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020 ISBN 978-2-8322-9920-3

– 2 – IEC 60152:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Hour numbers . 5
5 Phase difference . 6

Figure 1 – Illustration of hour number for three-phase transformer Dy11 . 6
Figure 2 – Examples of hour numbers representing phase differences . 7

IEC 60152:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DESIGNATION OF PHASE DIFFERENCES BY
HOUR NUMBERS IN THREE-PHASE AC SYSTEMS

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
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