EN 61472:2004

Live working - Minimum approach distances for a.c. systems in the voltage range 72,5 kV to 800 kV - A method of calculation

Describes a method for calculating the minimum approach distances for live working, at maximum voltages between 72,5 kV and 800 kV. This standard addresses system overvoltages, and the working air distances between parts and/or workers at different potentials. The required withstand voltage and minimum approach distances calculated by the method described in this standard are evaluated taking into consideration the following: - workers are trained for, and skilled in, working in the live working zone; - the anticipated overvoltages do not exceed the value selected for the determination of the required minimum approach distance; - transient overvoltages are the determining overvoltages; - tool insulation has no continuous film of moisture present on the surface; - no lightning is seen or heard within 10 km of the work site; - allowance is made for the effect of conducting components of tools; - the effect of altitude on the electric strength is taken into consideration. For conditions other than the above, the evaluation of the minimum approach distances may require specific data, derived by other calculation or obtained from additional laboratory investigations on the actual situation.

Arbeiten unter Spannung - Mindest-Arbeitsabstände für Wechselspannungsnetze im Spannungsbereich von 72,5 kV bis 800 kV - Berechnungsverfahren

Travaux sous tension - Distances minimales d'approche pour des réseaux à courant alternatif de tension comprise entre 72,5 kV et 800 kV - Une méthode de calcul

Décrit une méthode de calcul des distances minimales d'approche pour des travaux sous tension réalisés à des tensions maximales comprises entre 72,5 kV et 800 kV. Cette norme traite des surtensions de réseau et des distances de travail dans l'air entre des pièces et/ou des travailleurs à des potentiels différents. La tension de tenue requise et les distances minimales d'approche calculées suivant la méthode décrite dans cette norme sont évaluées en prenant en compte ce qui suit: - les travailleurs sont formés et qualifiés pour travailler dans la zone de travail sous tension; - les surtensions attendues ne dépassent pas la valeur choisie pour la détermination de la distance minimale d'approche requise; - les surtensions transitoires sont les surtensions déterminantes; - l'isolation des outils ne présente pas sur la surface un film continu d'humidité; - aucun éclair n'est vu ni entendu à moins de 10 km du lieu de travail; - l'influence des parties conductrices des outils est prise en compte; - l'effet de l'altitude sur la tenue électrique est pris en compte. Pour des conditions autres que celles ci-dessus, l'évaluation des distances minimales d'approche peut exiger des données spécifiques, provenant d'autres calculs ou obtenues à partir d'études additionnelles en laboratoire sur la situation concrète.

Delo pod napetostjo - Najmanjše razdalje za dostop do sistemov z izmenično napetostjo v območju od 72,5 kV do 800 kV - Metoda izračuna (IEC 61472:2004)

General Information

• Status: Withdrawn
• Publication Date: 18-Nov-2004
• Withdrawal Date: 30-Sep-2007
• ICS: 13.260 - Protection against electric shock. Live working
• ICS: 29.240.20 - Power transmission and distribution lines
• ICS: 29.260.99 - Other electrical equipment for working in special conditions
• Technical Committee: CLC/TC 78 - Equipment and tools for live working
• Drafting Committee: IEC/TC 78 - IEC_TC_78
• Parallel Committee: IEC/TC 78 - IEC_TC_78
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 16-May-2016
• Completion Date: 16-May-2016
• Ref Project: SIST EN 61472:2007 - Live working - Minimum approach distances for a.c. systems in the voltage range 72,5 kV to 800 kV - A method of calculation

Relations

• Replaced By: EN 61472:2013 - Live working - Minimum approach distances for a.c systems in the voltage range 72,5 kV to 800 kV - A method of calculation
• Effective Date: 28-Jan-2023

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EUROPEAN STANDARD EN 61472
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2004

ICS 13.260; 29.240.20; 29.260.99


English version


Live working –
Minimum approach distances for a.c. systems
in the voltage range 72,5 kV to 800 kV –
A method of calculation
(IEC 61472:2004)


Travaux sous tension –  Arbeiten unter Spannung –
Distances minimales d'approche Mindest-Arbeitsabstände für
pour des réseaux à courant alternatif Wechselspannungsnetze im
de tension comprise entre 72,5 kV Spannungsbereich von 72,5 kV
et 800 kV – bis 800 kV –
Une méthode de calcul Berechnungsverfahren
(CEI 61472:2004) (IEC 61472:2004)



This European Standard was approved by CENELEC on 2004-10-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, 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


© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61472:2004 E

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EN 61472:2004 - 2 -
Foreword
The text of document 78/582/FDIS, future edition 2 of IEC 61472, prepared by IEC TC 78, Live
working, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61472 on 2004-10-01.
This standard has been prepared according to the requirements of EN 61477: Live working –
Minimum requirements for the utilization of tools,devices and equipement, where applicable.
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) 2005-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-10-01
__________
Endorsement notice
The text of the International Standard IEC 61472:2004 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60060-1 NOTE Harmonized as HD 588.1 S1:1991 (not modified).
IEC 60071-1 NOTE Harmonized as EN 60071-1:1995 (not modified).
IEC 60071-2 NOTE Harmonized as EN 60071-2:1997 (not modified).
IEC 60743 NOTE Harmonized as EN 60743:2001 (not modified).
IEC 61477 NOTE Harmonized as EN 61477:2002 (not modified).

__________

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NORME CEI
INTERNATIONALE IEC
61472
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2004-07
Travaux sous tension –
Distances minimales d'approche
pour des réseaux à courant alternatif
de tension comprise entre 72,5 kV
et 800 kV –
Une méthode de calcul
Live working –
Minimum approach distances
for a.c. systems in the voltage range
72,5 kV to 800 kV –
A method of calculation
© IEC 2004 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 Electrotechni
...