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EUROPEAN STANDARD
EN 60519-4
NORME EUROPÉENNE
September 2006
EUROPÄISCHE NORM
ICS 25.180.10 Supersedes EN 60519-4:1997 + A1:2000

English version
Safety in electroheat installations
Part 4: Particular requirements
for arc furnace installations
(IEC 60519-4:2006)
Sécurité dans les installations Sicherheit in Elektrowärmeanlagen
électrothermiques Teil 4: Besondere Bestimmungen
Partie 4: Exigences particulières für Lichtbogenofenanlagen
pour les installations de fours à arc (IEC 60519-4:2006)
(CEI 60519-4:2006)
This European Standard was approved by CENELEC on 2006-09-01. 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, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the 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

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60519-4:2006 E
Foreword
The text of document 27/528/FDIS, future edition 3 of IEC 60519-4, prepared by IEC TC 27, Industrial
electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60519-4 on 2006-09-01.
This European Standard supersedes EN 60519-4:1997 + A1:2000.
It includes the following significant changes with respect to EN 60519-4:1997:
– the structure has been adjusted to that of EN 60519-1:2003;
– the classification takes into account the special definition of "band 2" for arc furnaces and the
possibility of band 3 equipment;
– additional provisions concerning the impact of electromagnetic effects have been introduced (in 6.4).
This part of EN 60519 shall be read in conjunction with EN 60519-1:2003. It is intended to modify, replace
or make additions to EN 60519-1 for particular requirements concerning arc furnace installations.
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) 2007-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60519-4:2006 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60519-4:2006
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

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 60050-841 2004 International electrotechnical vocabulary - -
Part 841: Industrial electroheat

IEC 60073 2002 Basic and safety principles for man-machine EN 60073 2002
interface, marking and identification - Coding
principles for indicators and actuators

IEC 60204-1 (mod) 2005 Safety of machinery - Electrical equipment of EN 60204-1 2006
machines
Part 1: General requirements
IEC 60364-4-41 2005 Low-voltage electrical installations - -
Part 4-41: Protection for safety - Protection
against electric shock
IEC 60364-4-43 2001 Electrical installations of buildings - -
Part 4-43: Protection for safety - Protection
against overcurrent
IEC/TS 60479-1 2005 Effects of current on human beings and - -
livestock
Part 1: General aspects
IEC 60519-1 2003 Safety in electroheat installations EN 60519-1 2003
Part 1: General requirements
1)
CISPR 11 (mod) - Industrial scientific and medical (ISM) radio-- -
frequency equipment - Electromagnetic
disturbance characteristics - Limits and
methods of measurement
1)
Undated reference.
NORME CEI
INTERNATIONALE
IEC
60519-4
INTERNATIONAL
Troisième édition
STANDARD
Third edition
2006-08
Sécurité dans les installations électrothermiques –
Partie 4:
Exigences particulières pour les installations
de fours à arc
Safety in electroheat installations –
Part 4:
Particular requirements for arc furnace
installations
 IEC 2006 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 Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
R
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60519-4  IEC:2006 – 3 –
CONTENTS
FOREWORD.5

1 Scope.9
2 Normative references .9
3 Terms and definitions .9
4 Classification of electroheat equipment according to voltage bands.11
5 Classification of electroheat equipment according to frequency bands.11
6 General requirements .11
7 Isolation and switching .15
8 Connections to the supply network .15
9 Protection against electric shock .17
10 Protection against overcurrent.17
11 Equipotential bonding .19
12 Control circuits and control functions .19
13 Protection against thermal influences .19
14 Risk of fire and danger of explosion.19
15 Marking, labelling and technical documentation .19
16 Information on inspection and commissioning, and instructions for utilization and
maintenance of arc furnace installations.19
17 Design requirements .23
18 Protection against overvoltage .29

Annex A (normative) Systems assuring improved safety to personnel working in the
vicinity of electrodes and other live parts of secondary circuit .31
Annex B (normative) Additional requirements for the safety of non-electrical
components of furnace installations .35

60519-4  IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY IN ELECTROHEAT INSTALLATIONS –

Part 4: Particular requirements for
arc furnace installations
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 all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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.
International Standard IEC 60519-4 has been prepared by IEC technical committee 27:
Industrial electroheating equipment.
This third edition cancels and replaces the second edition published in 1995 as well as its
amendment 1 (2000) and constitutes a technical revision.
This edition includes the following significant changes with respect to the previous edition.
– The structure has been adjusted to that of IEC 60519-1:2003.
– The classification takes into account the special definition of "band 2" for arc furnaces and
the possibility of band 3 equipment.
– Additional provisions concerning the impact of electromagnetic effects have been
introduced (in 6.4).
60519-4  IEC:2006 – 7 –
This part of IEC 60519 shall be read in conjunction with IEC 60519-1:2003. It is intended to
modify, replace or make additions to IEC 60519-1 for particular requirements concerning arc
furnace installations.
The text of this standard is based on the following documents:
FDIS Report on voting
27/528/FDIS 27/544/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all parts of the IEC 60519 series, under the general title Safety in electroheat
installations, can be found on the IEC website.
NOTE If necessary, additional parts covering particular industrial electroheat equipment may be prepared.
The
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