EN 60519-2:2006

Safety in electroheat installations - Part 2: Particular requirements for resistance heating equipment

Standardizes safety requirements for both indirect and direct resistance heating equipment. Is applicable to the indirect resistance heating equipment and the direct resistance heating equipment operating in voltage bands 1 and 2.

Sicherheit in Elektrowärmeanlagen - Teil 2: Besondere Anforderungen an Einrichtungen mit Widerstandserwärmung

Sécurité dans les installations électrothermiques - Partie 2: Exigences particulières pour les installations de chauffage par résistance

Normalise les exigences de sécurité pour les installations de chauffage par résistance. Est applicable aux installations de chauffage indirect et direct par résistance fonctionnant dans les domaines de tensions 1 et 2.

Varnost pri električnih grelnih inštalacijah – 2. del: Posebne zahteve za inštalacije za opremo uporovnega segrevanje (IEC 60519-2:2006)

General Information

• Status: Withdrawn
• Publication Date: 21-Sep-2006
• ICS: 25.180.10 - Electric furnaces
• Technical Committee: CLC/SR 27 - Industrial electroheating equipment
• Drafting Committee: IEC/TC 27 - IEC_TC_27
• Parallel Committee: IEC/TC 27 - IEC_TC_27
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 03-Apr-2019
• Completion Date: 23-Sep-2025
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: SIST EN 60519-2:2007 - Safety in electroheat installations -- Part 2: Particular requirements for resistance heating equipment

Relations

• Replaces: EN 60519-2:1993 - Safety in electroheat installations - Part 2: Particular requirements for resistance heating equipment
• Effective Date: 28-Jan-2023

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EUROPEAN STANDARD
EN 60519-2
NORME EUROPÉENNE
September 2006
EUROPÄISCHE NORM
ICS 25.180.10 Supersedes EN 60519-2:1993

English version
Safety in electroheat installations
Part 2: Particular requirements
for resistance heating equipment
(IEC 60519-2:2006)
Sécurité dans les installations Sicherheit in Elektrowärmeanlagen
électrothermiques Teil 2: Besondere Anforderungen an
Partie 2: Exigences particulières Einrichtungen mit Widerstandserwärmung
pour les installations de chauffage (IEC 60519-2:2006)
par résistance
(CEI 60519-2:2006)
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 60519-2:2006 E
Foreword
The text of document 27/525/FDIS, future edition 3 of IEC 60519-2, prepared by IEC TC 27, Industrial
electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60519-2 on 2006-09-01.
This European Standard supersedes EN 60519-2:1993.
Significant changes with respect to EN 60519-2:1993 are as follows:
– the structure has been adjusted to the latest ISO/IEC Directives;
– the latest edition of EN 60519-1 has been taken into account;
– definitions have been brought into line with the second edition of IEC 60050-841.
This standard shall be used in conjunction with EN 60519-1:2003. It is intended to modify, replace or
make additions to EN 60519-1 for particular requirements for resistance heating equipment.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2007-06-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-09-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60519-2:2006 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60519-2:2006
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 60335-1 (mod) 2001 Household and similar electrical appliances - EN 60335-1 2002
A1 2004 Safety A1 2004
Part 1: General requirements A11 2004
A12 2006
+ corr. July 2006
IEC 60364-4-41 2005 Low-voltage electrical installations - -
Part 4-41: Protection for safety - Protection
against electric shock
IEC 60364-4-42 2001 Electrical installations of buildings - -
Part 4-42: Protection for safety - Protection
against thermal effects
IEC 60398 1999 Industrial electroheating installations - EN 60398 1999
General test methods
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
IEC 60519-3 2005 Safety in electroheat installations EN 60519-3 2005
Part 3: Particular requirements for induction
and conduction heating and induction melting
installations
IEC 60519-4 1995 Safety in electroheat installations EN 60519-4 1997
A1 2000 Part 4: Particular requirements for arc furnace A1 2000
installations
IEC 60519-8 2005 Safety in electroheat installations EN 60519-8 2005
Part 8: Particular requirements for electroslag
remelting furnaces
IEC 60519-10 2005 Safety in electroheat installations - -
Part 10: Particular requirements for electrical
resistance trace heating systems for industrial
and commercial applications
Publication Year Title EN/HD Year
IEC 60519-21 1998 Safety in electroheat installations EN 60519-21 1998
Part 21: Particular requirements for
resistance heating equipment - Heating and
melting glass equipment
IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
- - (IP Code) + corr. May 1993
A1 1999 A1 2000
IEC 60990 1999 Methods of measurement of touch current EN 60990 1999
and protective conductor current

IEC 61140 2001 Protection against electric shock - Common EN 61140 2002
aspects for installation and equipment

NORME CEI
INTERNATIONALE
IEC
60519-2
INTERNATIONAL
Troisième édition
STANDARD
Third edition
2006-08
Sécurité dans les installations électrothermiques –
Partie 2:
Exigences particulières pour les installations
de chauffage par résistance
Safety in electroheat installations –
Part 2:
Particular requirements for resistance
heating equipment
 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: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
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International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60519-2  IEC:2006 – 3 –
CONTENTS
FOREWORD.5

1 Scope and object.9
2 Normative references .11
3 Terms and definitions .13
4 Classification of electroheat equipment according to voltage bands.17
5 Classification of electroheat equipment according to frequency bands.17
6 General requirements .17
6.7 Resistivity .17
6.8 Auxiliary equipment .17
6.9 Bare heating conductors.19
6.10 Leakage current .19
6.11 Vapours, precipitates and sediments from the charge.19
6.12 Salt-bath furnaces and melting furnaces.19
6.13 Heating-up solidified contents of the bath.21
6.14 Vacuum furnaces .21
7 Isolation and switching .21
8 Connection to the supply network and internal connections .21
9 Protection against electric shock .21
9.5 Protection against direct contact .21
9.6 Protection against direct and indirect contact .23
10 Protection against overcurrent.25
11 Equipotential bonding .25
12 Control circuits and control functions .25
13 Protection against thermal influences .25
13.6 Surface temperature of resistance heating equipment .25
13.7 Special measures.27
13.8 Temperature safety devices .27
13.9 Nitrite and nitrate bath furnaces .27
14 Risk of fire and danger of explosion.29
14.1 Nitrite and nitrate bath furnaces .29
15 Marking, labelling and technical documentation .29
15.2 Labelling .31
15.3 Technical documentation.31
16 Information on inspection and commissioning and instructions for utilization and
maintenance of electroheat installations .31
16.2 Information on inspection and commissioning.31
16.3 Instructions for utilization to be given in the technical documentation .33

60519-2  IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY IN ELECTROHEAT INSTALLATIONS –

Part 2: Particular requirements for resistance heating equipment

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 60519-2 has been prepared by IEC technical committee 27:
Industrial electroheating equipment.
This third edition cancels and replaces the second edition published in 1992 and constitutes a
technical revision. Significant changes with respect to the previous edition are as follows:
– the structure has been adjusted to the latest ISO/IEC Directives;
– the latest edition of IEC 60519-1 has been taken into account;
– definitions have been brought into line with the second edition of IEC 60050-841.
This standard shall be used in conjunction with IEC 60519-1:2003. It is intended to modify,
replace or make additions to IEC 60519-1 for particular requirements for resistance heating
equipment.
60519-2  IEC:2006 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
27/525/FDIS 27/541/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 parts of IEC 60519 series, under the general title Safety in electroheat
installations, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
60519-2  IEC:2006 – 9 –
SAFETY IN ELECTROHEAT INSTALLATIONS –

Part 2: Particular requirements for resistance heating equipment

1 Scope and object
This part of IEC 60519 is applicable to the indirect resistance heating equipment and the
direct resistance heating equipment specified in items a) and b) below respectively, operating
in voltage bands 1 and 2.
The object of this standard is the standardization of safety requirements for both indirect and
direct resistance heating equipment described below.
a) Indirect resistance heating equipment
These particular requirements apply to equipment for indirect resistance heating, such
equipment being energized with d.c. voltage or with single-phase or multiphase a.c. voltage of
frequency up to 60 Hz.
Heat generation is effected by current flow in
− solid metallic heating conductors;
− solid non-metallic heating conductors;
− radiant tubes and immersion heaters.
Examples of indirect resistance heating equipment in general use include
− discontinuous furnaces such as batch-type furnaces, muffle furnaces, pot-type furnaces
(crucible furnaces), pit-type furnaces, bell-type furnaces, bogie-hearth furnaces, fluidized-
bed furnaces, immersion heater metal baths;
− continuous furnaces with continuous or discontinuous charge conveyors, such as roller-
hearth furnaces, pusher furnaces, walking-beam furnaces, rotary-retort furnaces, rotary-
hearth furnaces, tunnel furnaces (kilns), continuous muffle furnaces.
Indirect resistance heating equipment in general use also includes
− equipment for heating solids, liquids or gases;
− equipment for melting and holding;
− individual heating-element assemblies (movable or fixed heaters).
Indirect resistance heating equipment where particular hazards are likely to occur includes
− nitrite bath furnaces;
− indirect resistance heating equipment where an explosive atmosphere is likely to occur
inside the furnace during heat treatment: furnaces for carburizing in gas atmospheres
consisting of the mixture of hydrogen and methane or propane and carbon monoxide;

60519-2  IEC:2006 – 11 –
− indirect resistance heating equipment with protective gas and/or reaction gas atmosphere:
furnaces for gas carburizing, gas nitriding, carbo-nitriding (protective gas, for example,
argon);
− equipment with infrared heating elements.
These requirements do not apply to trace heating systems dealt with in IEC 60519-10.
b) Direct resistance heating equipment
These particular requirements also apply to equipment for direct resistance heating by means
of current introduced by electrodes passing through the charge or a fluid to be heated. Such
equipment includes, for example,
− salt-bath electrode furnaces;
− glass-melting furnaces;
− furnaces for graphitizing;
− furnaces for production of silicon carbide.
These requirements do not apply to equipment for direct resistance heating, where, owing to
the technology used, IEC 60519-3, IEC 60519-4, IEC 60519-8 and IEC 60519-21 are
applicable. Moreover, they do not apply to electrode-steam-boiler instantaneous water
heaters and electrode pressure vessels.
2 Normative references
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.
IEC 60050-841:2004, International Electrotechnical Vocabulary (IEC) – Part 841: Industrial
electroheat
IEC 60335-1:2000, Household and similar electrical appliances – Safety – Part 1: General
requirements
Amendment 1 (2004)
IEC 60364-4-41:2005, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60364-4-42:2001, Electrical installations of buildings – Part 4-42: Protection for safety –
Protection against thermal effects
IEC 60398:1999, Industrial electroheating installations – General test methods
IEC 60479-1:2005, Effects of current on human beings and livestock – Part 1: General
aspects
IEC 60519-1:2003, Safety in electroheat installations – Part 1: General requirements
___________
There exists a consolidated edition 4.1 (2004) that includes edition 4 and its amendment 1.

60519-2  IEC:2006 – 13 –
IEC 60519-3:2005, Safety in electroheat installations – Part 3: Particular requirements for
induction and conduction heating and induction melting installations
IEC 60519-4:2000, Safety in electroheat installations – Part 4: Particular requirements for arc
furnace installations
IEC 60519-8:2005, Safety in electroheat installations – Part 8: Particular requirements for
electroslag remelting furnaces
IEC 60519-10:2005, Safety in electroheat installations – Part 10: Particular requirements for
electrical resistance trace heating systems for industrial and commercial applications
IEC 60519-21:1998, Safety in electroheat installations – Part 21: Particular requirements for
resistance heating equipment – Heating and melting glass equipment
IEC 60529:2001, Degrees of protection provided by enclosures (IP Code)
IEC 60990:1999, Methods of measurement of touch current and protective conductor current
IEC 61140:2001, Protection against electric shock – Common aspects for installation and
equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions, as well as those given
in IEC 60519-1 and IEC 60050-841, apply.
3.1
electrode (for direct resistance heating)
part of direct resistance heating which, being in contact with the charge, transfers the current
to it
3.2
heating conductor
conductor used for conversion of electric energy into heat
NOTE The term "heating conductor" is often used interchangeably with "heating resistor"
...