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SIST IEC/TR3 61200-413:2000
01-februar-2000
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Electrical installation guide - Clause 413: Explanatory notes to measures of protection
against indirect contact by automatic disconnection of supply
Guide pour les installations électriques - Article 413: Notes explicatives sur les mesures
de protection contre les contacts indirects par coupure automatique de l'alimentation
Ta slovenski standard je istoveten z: IEC/TR 61200-413
ICS:
13.260 9DUVWYRSUHGHOHNWULþQLP Protection against electric
XGDURP'HORSRGQDSHWRVWMR shock. Live working
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
SIST IEC/TR3 61200-413:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST IEC/TR3 61200-413:2000
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SIST IEC/TR3 61200-413:2000
CEI
RAPPORT
IEC
TECHNIQUE - TYPE 3
1200-413
TECHNICAL
Première édition
REPORT - TYPE 3
First edition
1996-03
installations électriques —
Guide pour les
Partie 413:
Protection contre les contacts indirects —
Coupure automatique de l'alimentation
Electrical installation guide —
Part 413:
Protection against indirect contact —
Automatic disconnection of supply
réservés — Copyright — all rights reserved
© CEI 1996 Droits de reproduction
No part of this publication may be reproduced or utilized in
Aucune partie de cette publication ne peut étre reproduite ni
any form or by any means, electronic or mechanical,
utilisée sous quelque forme que ce soit et par aucun pro-
including photocopying and microfilm, without permission
cédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans j accord écrit de l'éditeur. in writing from the publisher.
Suisse
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève,
Commission Electrotechnique Internationale "
CODE PRIX
International Electrotechnical Commission
PRICE CODEPRICE CODE
IEC MewityHapoAHan 3nersrpoTeXHH4ecIaa iioMHCCHH
voir catalogue en vigueur • Pour prix,
•
For price, see current catalogue
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SIST IEC/TR3 61200-413:2000
1200-413 © IEC:1996 - 3 -
CONTENTS
Page
FOREWORD 5
Clause
O Introduction 9
0.1 Principle of the protective measure 9
0.2 Effects of electric current on the human body 9
0.3 Electrical impedance of the human body 15
0.4 Situations 15
0.5 Main equipotential bonding 17
1 Scope 21
2 Reference documents 21
3 Application of types of system earthing 23
413.1.3 TN-system 23
413.1.3.1 Fault loop 23
413.1.3.3 Prospective touch voltage 23
413.1.3.3 Analysis of conditions for protection 25
413.1.3.5 Distribution circuits 27
413.1.3 Practical application of conditions for protection 33
413.1.3.5 Cases where a disconnection time up to 5 s is permitted 41
413.1.3.6, 413.1.3.8 and 413.1.3.9 Protection by residual current protective devices 47
413.1.3.7 Limitation of fault voltage based on voltage balance 45
413.1.4 TT-system 51
413.1.4.1 Fault loop 51
413.1.4.2 Analysis of conditions of protection 51
413.1.4.4 Protective devices 53
413.1.5 IT-system 55
413.1.5.1, 413.1.5.3 No disconnection for the first fault 55
413.1.5.3, 473.3.2.2 Types of IT systems 55
413.1.6 Supplementary equipotential bonding 61
Annexes
A Protection following a second fault (413.1.5.5, 413.1.5.6) 63
B Definition of touch voltage, prospective touch voltage and fault current 75
C Conditions of protection in particular situations 85
D The influence of fault currents on the resistance of conductors 91
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SIST IEC/TR3 61200-413:2000
1200-413 ©IEC:1996 – 5 -
ELECTRICAL INSTALLATION GUIDE -
Part 413: Protection against indirect contact -
Automatic disconnection of supply
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the IEC on technical matters, express as nearly as possible, an
inter
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