SIST EN 60519-4:2014

SLOVENSKI STANDARD
01-februar-2014
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SIST EN 60519-4:2007
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Safety in electroheating installations - Part 4: Particular requirements for arc furnace
installations
Sicherheit in Elektrowärmeanlagen - Teil 4: Besondere Bestimmungen für
Lichtbogenofenanlagen
Sécurité dans les installations électrothermiques - Partie 4: Exigences particulières pour
les installations de fours à arc
Ta slovenski standard je istoveten z: EN 60519-4:2013
ICS:
25.180.10 (OHNWULþQHSHþL Electric furnaces
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60519-4
NORME EUROPÉENNE
August 2013
EUROPÄISCHE NORM
ICS 25.180.10 Supersedes EN 60519-4:2006

English version
Safety in electroheating installations -
Part 4: Particular requirements for arc furnace installations
(IEC 60519-4:2013)
Sécurité dans les installations Sicherheit in Elektrowärmeanlagen -
électrothermiques - Teil 4: Besondere Bestimmungen für
Partie 4: Exigences particulières pour les Lichtbogenofenanlagen
installations de fours à arc (IEC 60519-4:2013)
(CEI 60519-4:2013)
This European Standard was approved by CENELEC on 2013-07-24. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60519-4:2013 E
Foreword
The text of document 27/904/FDIS, future edition 4 of IEC 60519-4, prepared by IEC/TC 27 "Industrial
electroheating and electromagnetic processing" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN 60519-4:2013.
The following dates are fixed:
(dop) 2014-04-24
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-07-24
• latest date by which the national
standards conflicting with the
document have to be withdrawn
The clauses of parts of the EN 60519 series (hereinafter called Particular requirements) supplement or
modify the corresponding clauses of EN 60519-1:2011 (General requirements hereinafter called
Part 1).
This part of EN 60519 is to be read in conjunction with Part 1. It supplements or modifies the
corresponding clauses of Part 1. Where the text indicates an "addition" to or a "replacement" of the
relevant provision of Part 1, these changes are made to the relevant text of Part 1. Where no change
is necessary, the words "This clause of Part 1 is applicable" are used. When a particular subclause of
Part 1 is not mentioned in this part, that subclause applies as far as is reasonable.

Additional specific provisions to those in Part 1, given as individual clauses or subclauses, are
numbered starting from 101.
NOTE The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including those in a
replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.

This document supersedes EN 60519-4:2006.
EN 60519-4:2006:
– The structure has been amended and adjusted to EN 60519-1:2011;
– The classification (Clause 4) has been adapted to details with respect to secondary voltage in
electric arc furnace installations;
– All provisions have been redrafted and the text is more concise with respect to EAF;
– Annexes AA, BB and CC have been restructured, with respect to details concerning high voltage
designs and non-electrical issues, however to be aware of in those installations.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment
Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).

- 3 - EN 60519-4:2013
Endorsement notice
The text of the International Standard IEC 60519-4:2013 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:

IEC 60073:2002 NOTE Harmonised as EN 60073:2002 (not modified).

Annex ZA
(normative)
Normative references to i nternational publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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/TS 60479-1 - Effects of current on human beings and - -
livestock -
Part 1: General aspects
IEC 60519-1 2010 Safety in electroheating installations - EN 60519-1 2011
+ corr. November 2012 Part 1: General requirements

IEC 60676 - Industrial electroheating equipment - Test EN 60676 -
methods for direct arc furnaces

IEC 60683 - Industrial electroheating equipment - Test EN 60683 -
methods for submerged arc furnaces

IEC 60519-4 ®
Edition 4.0 2013-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety in electroheating installations –

Part 4: Particular requirements for arc furnace installations

Sécurité dans les installations électrothermiques –

Partie 4: Exigences particulières pour les installations de fours à arc

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 25.180.10 ISBN 978-2-83220-873-1

– 2 – 60519-4 © IEC:2013
CONTENTS
FOREWORD . 3
1 Scope and object . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Classification of electroheating equipment . 7
5 General requirements . 7
6 Isolation and switching . 8
7 Connections to the electrical supply network and internal connections . 10
8 Protection against electric shock . 10
9 Equipotential bonding . 11
10 Control circuits and control functions . 11
11 Protection against thermal influences . 11
12 Protection against other hazards . 11
13 Marking, labelling and technical documentation . 11
14 Commissioning, inspection, operation and maintenance . 11
Annex A (normative) Protection against electric shock – special measures . 14
Annex AA (normative) Systems to assure improved safety for personnel working in
the vicinity of electrodes and other live parts of secondary circuit . 15
Annex BB (normative) Additional requirements for the safety of non-electrical
components of furnace installations . 18
Annex CC (normative) Additional requirements for safety with respect to design of an
installation . 20
Bibliography . 23

Figure AA.1 – Arc furnace supply with HV furnace switch (or HV furnace breaker) in
open position and HV disconnector in open position . 15
Figure AA.2 – Arc furnace supply with HV furnace switch (or HV furnace breaker) in
open position and HV earthing switch in closed position . 15
Figure AA.3 – Arc furnace supply with buck-boost transformer or intermediate circuit
transformer . 16
Figure AA.4 – DC furnace supply with HV furnace switch (or HV furnace breaker) in
open position and HV disconnector in open position . 17
Figure AA.5 – DC furnace supply with HV furnace switch (or HV furnace breaker) in
closed position, valve firing pulses stopped and LV disconnector switch in open
position . 17

60519-4 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY IN ELECTROHEATING 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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 and electromagnetic processing.
This fourth edition cancels and replaces the third edition published in 2006. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– The structure has been amended and adjusted to IEC 60519-1:2010;
– The classification (Clause 4) has been adapted to details with respect to secondary
voltage in electric arc furnace installations;
– All provisions have been redrafted and the text is more concise with respect to EAF;
– Annexes AA, BB and CC have been restructured, with respect to details concerning high
voltage designs and non-electrical issues, however to be aware of in those installations.

– 4 – 60519-4 © IEC:2013
The text of this standard is based on the following documents:
FDIS Report on voting
27/904/FDIS 27/928/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.
A list of all the parts of IEC 60519 series, under the general title Safety in electroheating
installations, can be found on the IEC website.
The clauses of parts of the IEC 60519 series (hereinafter called Particular Requirements)
supplement or modify the corresponding clauses of IEC 60519-1:2010 (General requirements
hereinafter called Part 1).
This part of IEC 60519 is to be read in conjunction with Part 1. It supplements or modifies the
corresponding clauses of Part 1. Where the text indicates an "addition" to or a "replacement"
of the relevant provision of Part 1, these changes are made to the relevant text of Part 1.
Where no change is necessary, the words "This clause of Part 1 is applicable" are used.
When a particular subclause of Part 1 is not mentioned in this part, that subclause applies as
far as is reasonable.
Additional specific provisions to those in Part 1, given as individual clauses or subclauses, are
numbered starting from 101.
NOTE The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60519-4 © IEC:2013 – 5 –
SAFETY IN ELECTROHEATING INSTALLATIONS –

Part 4: Particular requirements for arc furnace installations

1 Scope and object
This clause of Part 1 is replaced by the following.
Replacement:
This part of IEC 60519 provides particular safety requirements for electric arc furnace
installations and its operating and maintenance personnel.
These safety provisions concern the protection of persons and the environment against
dangers of electrical origin and also against certain dangers of non-electrical origin.
This standard is applicable to electroheating installations such as:
a) Furnaces for direct arc heating, forming arcs between the electrode and metal such as the
electric arc furnace using alternating current (EAFac) or direct current (EAFdc), and ladle
furnace (LF);
b) Furnaces for arc-resistance heating forming arcs between the electrode and the charge
material or heating the charge material by the Joule effect, such as the submerged arc
furnace using alternating current (SAFac), or direct current (SAFdc).
NOTE For purposes of this document abbreviation EAF is used for all kinds of electric arc furnace installations.
2 Normative references
This clause of Part 1 is applicable with the following additions.
Additions:
IEC 60519-1:2010, Safety in electroheating installations – Part 1: General requirements
IEC/TS 60479-1, Effects of current on human beings and livestock – Part 1: General aspects
IEC 60676, Industrial electroheating equipment – Test methods for direct arc furnaces
IEC 60683, Industrial electroheating equipment – Test methods for submerged-arc furnaces
3 Terms and definitions
This clause of Part 1 is applicable with the following additions.
Additions:
NOTE 101 General definitions can be found in the IEC 60050 series, International Electrotechnical Vocabulary.
Terms relating to industrial electroheat are defined in IEC 60050-841. Terms relating to EAF and SAF are also
defined in IEC 60676 and IEC 60683.

– 6 – 60519-4 © IEC:2013
3.101
arc furnace
furnace with a vessel, in which a metallic charge is heated mainly by electric arc using
alternating current (EAFac) or direct current (EAFdc)
[SOURCE: IEC 60050-841:2004, 841-26-05, modified – the definition has been modified and
abbreviations have been added]
3.102
arc furnace transformer
transformer changing medium/high voltage electrical supply to low voltage and high current
for an EAF
[SOURCE: IEC 60050-841:2004, 841-26-55, modified – the definition has been modified]
3.103
electric arc furnace using alternating current
EAFac
furnace, in which electric arcs between the electrodes and the process material are formed,
using three-phase alternating current
Note 1 to entry: Ladle furnace (LF) is operated under the same conditions.
Note 2 to entry: This note only applies to the French language.
[SOURCE: IEC 60050-841:2004, 841-26-07, modified – the term “alternating current arc
furnace” has been replaced by “electric arc furnace using alternating current”, the definition
has been modified, and an abbreviation and Notes 1 and 2 have been added]
3.104
electric arc furnace using direct current
EAFdc
furnace, in which the direct current is induced via a bottom electrode (anode) to the material
to be processed, forming arcs between the material and the electrode from top (cathode)
[SOURCE: IEC 60050-841:2004, 841-26-06, modified – the term “direct current arc furnace”
has been replaced by “electric arc furnace using direct current”, the definition has been
modified and an abbreviation has been added]
3.105
EAF electrode
part produced from high density graphite to transfer the electrical energy forming arcs
between tip and charge material
Note 1 to entry: In EAFdc, a bottom electrode (anode) is metallic or conductive material in the bottom of an EAF
and arcs are formed between the charge material and the graphite electrode from top (cathode).
[SOURCE: IEC 60050-841:2004, 841-26-38, modified – the term “arc furnace electrode” has
been replaced by “EAF electrode”, the definition has been modified and Note 1 has been
added]
3.106
electrode clamp
metallic, water cooled equipment to hold the electrode and supply current for arcing to the
electrode
[SOURCE: IEC 60050-841:2004, 841-26-39, modified – the definition has been editorially
improved]
60519-4 © IEC:2013 – 7 –
3.107
rectifier for direct current
device by means of which alternating current is transferred into direct current for EAFdc
3.108
shell
body of EAF made from steel and covered by a roof
[SOURCE: IEC 60050-841:2004, 841-26-20, modified – the term “arc furnace shell” has
been replaced by “shell” and the definition has been modified]
3.109
submerged arc furnace
SAF
vessel in which a combined arc / resistance heating is used to melt the charged material
[SOURCE: IEC 60050-841:2004, 841-26-12, modified – the term “submerged arc-resistance
furnace” has been replaced and the definition has been modified]
4 Classification of electroheating equipment
This clause of Part 1 is applicable, except as follows:
4.2 Classification of electroheating equipment according to process frequency
4.2.1 Direct current equipment
Addition:
EAFdc and SAFdc are classified as zero (0) frequency. It creates electromagnetic
disturbances.
4.2.101 Secondary voltage
Arc furnaces can be operated with a secondary voltage above 1 000 V a.c. (1 500 V d.c.)
under preconditions as follows:
a) the EAF is switched-on on the primary side of the transformer, since there is no possibility
to switch the installation on the secondary side (except installations shown in
Figures AA.3 and AA.5);
b) the insulation of the high current conductors to ground follows the minimum relevant
standard IEC 60071-1 for secondary voltages above 1 000 V a.c.
5 General requirements
This clause of Part 1 is applicable, except as follows:
5.1 General
Additions:
5.1.101 All high voltage equipment on the furnace transformer primary side is designed,
constructed and enclosed during any operation in accordance with IEC 61936-1:
a) For arc furnaces with secondary voltage up to 1 000 V a.c. or up to 1 500 V d.c. the
minimum relevant standard IEC 60664-1 applies;
b) standard furnace operation according to the conditions, mentioned in 6.101;

– 8 – 60519-4 © IEC:2013
c) visible information is given in the control room with respect to the status of the high
voltage switchgear.
5.2 Electroheating equipment
Additions:
5.2.101 Furnace installations exceeding 1 000 V a.c. shall take into account ionization
phenomena due to metallic vapour and pollution at high temperatures which may occur.
Insulation and distance between the electric phases shall be considered respectively.
5.2.102 Devices necessary for the operation (i.e. local control facilities, valve stands, lances
and manipulators) of the furnace shall be arranged within easy reach of the operator and
sufficient protection against live parts.
5.2.103 Devices for operation shall be designed and placed to prevent their unintended
activation. Devices for operation with pl
...