EN 60909-0:2001

Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents

Applicable to the calculation of short-circuit currents: - in low-voltage three-phase a.c. systems - in high-voltage three-phase a.c. systems operating at a nominal frequency of 50 Hz or 60 Hz. Systems at highest voltages of 550 kV and above with long transmission lines need special consideration. The contents of the corrigendum of February 2002 have been included in this copy.

Kurzschlussströme in Drehstromnetzen - Teil 0: Berechnung der Ströme

Courants de court-circuit dans les réseaux triphasés à courant alternatif - Partie 0: Calcul des courants

Applicable au calcul des courants de court-circuit: - dans les réseaux triphasés basse tension à courant alternatif, - dans les réseaux triphasés haute tension à courant alternatif, fonctionnant à une fréquence nominale de 50 Hz ou de 60 Hz. Les réseaux de tensions très élevées, 550 kV et plus, avec lignes de transport de grande longueur nécessitent un traitement particulier. Le contenu du corrigendum de février 2002 a été pris en considération dans cet exemplaire.

Kratkostični toki v izmeničnih trifaznih sistemih - 0. del: Računanje tokov

General Information

• Status: Withdrawn
• Publication Date: 12-Aug-2001
• Withdrawal Date: 30-Jun-2004
• ICS: 17.220.01 - Electricity. Magnetism. General aspects
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: CLC/SR 73 - Short-circuit currents
• Drafting Committee: IEC/TC 73 - IEC_TC_73
• Parallel Committee: IEC/TC 73 - IEC_TC_73
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 10-Jun-2019
• Completion Date: 10-Jun-2019
• Ref Project: SIST EN 60909-0:2002 - Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents

Relations

• Replaces: HD 533 S1:1991 - Short-circuit current calculation in three-phase a.c. systems
• Effective Date: 29-Jan-2023
• Replaced By: EN 60909-0:2016 - Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents
• Effective Date: 22-Oct-2014

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2002
1DGRPHãþD
SIST HD 533 S1:1998
.UDWNRVWLþQLWRNLYL]PHQLþQLKWULID]QLKVLVWHPLKGHO5DþXQDQMHWRNRY
Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents
Kurzschlussströme in Drehstromnetzen - Teil 0: Berechnung der Ströme
Courants de court-circuit dans les réseaux triphasés à courant alternatif  Partie 0: Calcul
des courants
Ta slovenski standard je istoveten z: EN 60909-0:2001
ICS:
17.220.01 Elektrika. Magnetizem. Electricity. Magnetism.
Splošni vidiki General aspects
29.240.20 Daljnovodi Power transmission and
distribution lines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60909-0
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2001
ICS 17.220.01; 29.240.20 Supersedes HD 533 S1:1991
English version
Short-circuit currents in three-phase a.c. systems
Part 0: Calculation of currents
(IEC 60909-0:2001)
Courants de court-circuit dans les réseaux Kurzschlussströme in Drehstromnetzen
triphasés à courant alternatif Teil 0: Berechnung der Ströme
Partie 0: Calcul des courants (IEC 60909-0:2001)
(CEI 60909-0:2001)
This European Standard was approved by CENELEC on 2001-07-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, 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
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60909-0:2001 E
Foreword
The text of document 73/119/FDIS, future edition 1 of IEC 60909-0, prepared by IEC TC 73,
Short-circuit currents, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60909-0 on 2001-07-01.
This European Standard supersedes HD 533 S1:1991.
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 (d'op) 2002-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-07-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A and ZA are normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60909-0:2001 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60909-0:2001
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
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
IEC 60038 (mod) 1983 Nominal voltages for low-voltage public HD 472 S1 1989
electricity supply systems
IEC 60050-131 1978 International Electrotechnical --
Vocabulary (IEV)
Chapter 131: Electric and magnetic
circuits
IEC 60050-151 1978 Chapter 151: Electrical and magnetic--
devices
IEC 60050-195 1998 Chapter 195: Earthing and protection--
against electric shock
1)
IEC 60056 (mod) 1987 High-voltage alternating-current circuit- HD 348 S7 1998
breakers
IEC 60071-1 1993 Insulation co-ordination EN 60071-1 1995
Part 1: Definitions, principles and rules
IEC 60781 1989 Application guide for calculation of HD 581 S1 1991
short-circuit currents in low-voltage
radial systems
IEC 60865-1 1993 Short-circuit currents - Calculation of EN 60865-1 1993
effects
Part 1: Definitions and calculation
methods
2)
IEC 60909-1 Short-circuit currents calculation in--
three-phase a.c. systems
Part 1: Factors for the calculation of
short-circuit currents in three-phase
a.c. systems according to IEC 60909-0

1)
HD 348 S7 is based on IEC 60056:1987 + A3:1996.
2)
To be published.
Publication Year Title EN/HD Year
IEC 60909-2 1992 Electrical equipment - Data for short---
circuit current calculations in
accordance with IEC 60909
IEC 60909-3 1995 Part 3: Currents during two separate--
simultaneous single phase line-to-earth
short circuits and partial short-circuit
currents flowing through earth
2)
IEC 60909-4 Part 4: Examples for the calculation of--
short-circuit currents
IEC 60949 1988 Calculation of thermally permissible--
short-circuit currents, taking into
account non-adiabatic heating effects
IEC 60986 1989 Guide to the short-circuit temperature--
limits of electric cables with a rated
voltage from 1,8/3 (3,6) kV to
18/30 (36) kV
2)
To be published.
NORME CEI
INTERNATIONALE IEC
60909-0
INTERNATIONAL
Première édition
STANDARD
First edition
2001-07
Courants de court-circuit dans les réseaux
triphasés à courant alternatif –
Partie 0:
Calcul des courants
Short-circuit currents in three-phase
a.c. systems –
Part 0:
Calculation of currents
 IEC 2001 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
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
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PRICE CODE
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Pour prix, voir catalogue en vigueur
For price, see current catalogue

60909-0  IEC:2001 – 3 –
CONTENTS
FOREWORD. 9
1 General . 13
1.1 Scope .13
1.2 Normative references . 15
1.3 Definitions . 17
1.4 Symbols, subscripts and superscripts. 25
1.4.1 Symbols . 25
1.4.2 Subscripts . 29
1.4.3 Superscripts . 31
2 Characteristics of short-circuit currents: calculating method. 31
2.1 General.31
2.2 Calculation assumptions. 35
2.3 Method of calculation . 35
2.3.1 Equivalent voltage source at the short-circuit location . 35
2.3.2 Application of symmetrical components . 41
2.4 Maximum short-circuit currents . 45
2.5 Minimum short-circuit currents . 47
3 Short-circuit impedances of electrical equipment. 47
3.1 General.47
3.2 Network feeders . 49
3.3 Transformers . 51
3.3.1 Two-winding transformers . 51
3.3.2 Three-winding transformers . 53
3.3.3 Impedance correction factors for two- and three-winding
network transformers . 57
3.4 Overhead lines and cables . 59
3.5 Short-circuit limiting reactors . 61
3.6 Synchronous machines . 61
3.6.1 Synchronous generators . 61
3.6.2 Synchronous compensators and motors . 65
3.7 Power station unit . 65
3.7.1 Power station units with on-load tap-changer. 65
3.7.2 Power station units without on-load tap-changer. 69
3.8 Asynchronous motors. 71
3.8.1 General . 71
3.8.2 Contribution to short-circuit currents by asynchronous motors . 73
3.9 Static converters. 77
3.10 Capacitors and non-rotating loads . 77
4 Calculation of short-circuit currents . 79
4.1 General.79
4.2 Initial symmetrical short-circuit current I ′′ . 83
k
60909-0  IEC:2001 – 5 –
4.2.1 Three-phase short circuit. 83
4.2.2 Line-to-line short circuit . 95
4.2.3 Line-to-line short circuit with earth connection. 99
4.2.4 Line-to-earth short circuit .101
4.3 Peak short-circuit current i .101
p
4.3.1 Three-phase short circuit.101
4.3.2 Line-to-line short circuit .105
4.3.3 Line-to-line short circuit with earth connection.105
4.3.4 Line-to-earth short circuit .107
4.4 DC component of the short-circuit current .107
...........................................................107
4.5 Symmetrical short-circuit breaking current I
b
4.5.1 Far-from-generator short circuit .107
4.5.2 Near-to-generator short circuit .109
..........................................................................117
4.6 Steady-state short-circuit current I
k
4.6.1 Three-phase short circuit of one generator or one power station unit .117
4.6.2 Three-phase short circuit in non-meshed networks.121
4.6.3 Three-phase short circuit in meshed networks.123
4.6.4 Unbalanced short circuits.123
4.6.5 Short circuits at the low-voltage side of transformers, if one line conductor
is interrupted at the high-voltage side .125
4.7 Terminal short circuit of asynchronous motors.127
4.8 Joule integral and thermal equivalent short-circuit current
...