Designation of phase differences by hour numbers in three-phase AC systems

IEC 60152:2021 specifies methods and rules for the designation of phase difference between two items in a three-phase AC system. The designations are intended to be applied in the technical documentation of industrial installations, equipment, and products, and also on markings of equipment and products.
IEC 60152:2021 cancels and replaces the first edition published in 1963. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the title has been updated to reflect the content of the document;
b) the concept of identifying conductors with hour number has been removed as the concept is considered out of date and other means for identifying conductors exists;
c) definition of hour number (clock number) and phase difference introduced.

Désignation des déphasages par indices horaires des réseaux en courant alternatif triphasés

L'IEC 61052:2021 spécifie les méthodes et les règles en vue de la désignation du déphasage entre deux entités dans un réseau en courant alternatif triphasé. Les désignations sont destinées à figurer dans la documentation technique des installations, matériels et produits industriels, ainsi que sur les marquages des matériels et produits.
L'IEC 61052:2021 annule et remplace la 1re édition parue en 1963. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le titre a été mis à jour en vue de refléter le contenu du nouveau document;
b) le concept d'identification des conducteurs par indices horaires a été supprimé, car il est considéré comme dépassé et qu’il existe d'autres moyens d'identification des conducteurs;
c) la définition de l’indice horaire (indice d’horloge) et celle du déphasage ont été ajoutées.

General Information

Status
Published
Publication Date
08-Jul-2021
Current Stage
PPUB - Publication issued
Completion Date
09-Jul-2021
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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
IEC 60152:2021-07(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 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

---------------------- Page: 4 ----------------------
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

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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

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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.

IEC 60152 has been prepared by IEC technical committee 3: Documentation, graphical symbols

and representations of technical information. It is an International Standard.

This second edition cancels and replaces the first edition published in 1963. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) the title has been updated to reflect the content of the document;

b) the concept of identifying conductors with hour number has been removed as the concept

is considered out of date and other means for identifying conductors exists;
c) definition of hour number (clock number) and phase difference introduced.
---------------------- Page: 5 ----------------------
– 4 – IEC 60152:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
3/1490/FDIS 3/1516/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

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

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 60152:2021 © IEC 2021 – 5 –
DESIGNATION OF PHASE DIFFERENCES BY
HOUR NUMBERS IN THREE-PHASE AC SYSTEMS
1 Scope

This document specifies methods and rules for the designation of phase difference between

two items in a three-phase AC system. The designations are intended to be applied in the

technical documentation of industrial installations, equipment, and products, and also on

markings of equipment and products.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
hour number
clock number

designation of a phase difference between the same quantity of two items in an AC system

3.2
phase difference

for two sinusoidal quantities of the same frequency in a given order, difference between their

initial phases with possible addition of a multiple of 2π so that the difference is greater than −π

and not greater than π
 

Note 1 to entry: For the quantities at´( ) A´cos(ωϑt+ ´ ) and at˝( ) A˝˝cos(ωϑt+ ) the phase difference is

0 0

𝜑𝜑= 𝜗𝜗˝ − 𝜗𝜗´ + 2𝜋𝜋𝜋𝜋 where n is an integer, chosen so that −𝜋𝜋< 𝜑𝜑 ≤ 𝜋𝜋.

0 0
[SOURCE: IEC 60050-103:2009, 103-07-06]
4 Hour numbers

For the designation of a phase difference in a three-phase AC system, the following hour

numbers may be used:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11.

Each hour number shall represent the corresponding multiple of a phase difference of 30°.

= =
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...

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