IEC 60519-12:2013

IEC 60519-12
®

Edition 1.0 2013-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Safety in electroheating installations –
Part 12: Particular requirements for infrared electroheating installations

Sécurité dans les installations électrothermiques –
Partie 12: Exigences particulières pour les installations électrothermiques par
rayonnement infrarouge

IEC 60519-12:2013

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IEC 60519-12

®


Edition 1.0 2013-04




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Safety in electroheating installations –

Part 12: Particular requirements for infrared electroheating installations




Sécurité dans les installations électrothermiques –

Partie 12: Exigences particulières pour les installations électrothermiques par

rayonnement infrarouge















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX W


ICS 25.180.10 ISBN 978-2-83220-742-0



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 7
2 Normative references . 8
3 Terms and definitions . 8
4 Classification of electroheating equipment . 11
5 General requirements . 11
6 Isolation and switching . 14
7 Connection to the electrical supply network and internal connections . 14
8 Protection against electric shock . 14
9 Equipotential bonding. 14
10 Control circuits and control functions . 14
11 Protection against thermal influences . 15
12 Protection against other hazards . 16
13 Marking, labelling and technical documentation . 17
14 Commissioning, inspection, operation and maintenance . 18
Annex A (normative) Protection against electric shock – special measures . 19
Annex AA (normative) Classification of infrared exposure . 20
Annex BB (normative) Measurement procedure . 24
Annex CC (normative) Qualified calculation of exposure . 26
Annex DD (normative) Protective measures against infrared radiation . 27
Annex EE (informative) Simplified measurement method for the assessment of thermal
infrared radiation exposure . 29
Annex FF (informative) Measurement device for total irradiance . 35
Annex GG (normative) Marking of emission or exposure . 36
Bibliography . 37

Figure AA.1 – Risk groups and exposure limits (see Table AA.2) depending on time of
exposure and irradiation . 23
Figure AA.2 – Risk groups and exposure limits (see Table AA.3) depending on time of
exposure and radiance . 23
Figure EE.1 – Factors for converting measured total irradiance into band irradiance,
depending on surface temperature of a grey emitter generating the signal . 31
Figure EE.2 – Factor for converting measured total radiance into relevant retinal thermal
radiance, depending on surface temperature of a grey emitter generating the signal . 34
Figure FF.1 – Example of a detector for total irradiance measurement . 35
Figure GG.1 – Example of warning marking for infrared radiation . 36

Table 101 – Procedure for assessment and reduction of radiation exposure through
design . 13
Table 102 – Thermal safety . 16
Table AA.1 – Classification of infrared electroheating equipment by emission of
radiation . 20
Table AA.2 – Exposure limits in the infrared, irradiance based values . 20

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60519-12 © IEC:2013 – 3 –
Table AA.3 – Exposure limits in the infrared, radiance based values . 21
Table EE.1 – Measurement procedure . 29

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SAFETY IN ELECTROHEATING INSTALLATIONS –

Part 12: Particular requirements for infrared electroheating 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,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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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
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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
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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 60519-12 has been prepared by IEC technical committee 27:
Industrial electroheating and electromagnetic processing.
The text of this standard is based on the following documents:
FDIS Report on voting
27/894/FDIS 27/905/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 in the IEC 60519 series, published under the general title Safety in
electroheating installations, can be found on the IEC website.

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60519-12 © IEC:2013 – 5 –
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.

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INTRODUCTION
The scope of this standard covers very different types and designs of infrared equipment used
for many different purposes by the industry. This standard is intended to cover all industrial
infrared equipment types, with some few exceptions described in Clause 1.
As many different types of electroheating equipment emit infrared radiation of hazardous
levels, the scope of this Part 12 of the IEC 60519 series addresses these infrared radiation
aspects for other parts of the series as well. Especially and with reference to IEC 60519-2:2006
1
[3] it has been agreed in TC 27 that this standard covers all kinds of infrared emission
hazards of industrial electroheating installations.
The discussion of infrared radiation has become quite detailed in this standard, as for the
industry there is not any single useful source available for simple, versatile, easy to use and
cost effective measurement methods.
Provisions of this standard relating to hazards by infrared emission from the equipment as such
and from hot workloads can be used as a complement to IEC 60519-2:2006, since such
aspects are not dealt with in that standard.
This standard provides guidance on the assessment and avoidance of hazards caused by
infrared radiation emitted to accessible locations by hot workloads, electrodes, or other thermal
sources belonging to electroheating equipment.
The other principles for covering the risks caused by infrared radiation were:
– Neither the manufacturer nor the user of electroheating equipment usually employs an
expert in optical radiation measurement or has access to an optical laboratory with all the
necessary equipment needed for elaborate measurements.
– Operating staff with limited experience in radiation measurement is usually responsible for
the task of performing the necessary measurements and will appreciate a simple and easy
to follow guide.
– EN 14255-2:2005 is defined for and useful for lamps only [8].
– EN 12198 series is not very detailed on measurement methods. It gives good guidance on
procedures to improve the safety of equipment. Some material from this source has been
adapted [9 – 11].
– The scope of IEC 62471:2006 is limited to lamps but that standard can be used for other
light sources. Therefore, core aspects were adapted and if possible simplified for this
standard. Content that is essential for safety of electroheating equipment is included in this
standard.
– Figures illustrating the classes defined in IEC 62471:2006 are included to provide a more
understandable and useful standard (IEC 62471:2006 provides data only in the tables).
– Relevant documents of American National Standard Institute / Illuminating Engineering
Society of North America, the ANSI/IESNA RP 27 series [12 – 14], are based on the
ICNIRP recommendations [1, 2] as well. They provide no extra material with regard to this
standard and its references.
A new infrared warning sign shown in Annex GG has been defined in liaison with IEC/SC 3C.
———————
1
 Numbers in square brackets refer to the Bibliography.

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60519-12 © IEC:2013 – 7 –
SAFETY IN ELECTROHEATING INSTALLATIONS –

Part 12: Particular requirements for infrared electroheating installations



1 Scope and object
This clause of Part 1 is replaced by the following.
Replacement:
This part of IEC 60519 specifies safety requirements for industrial electroheating equipment
and installations in which infrared radiation, usually generated by infrared emitters, is
significantly dominating over heat convection or heat conduction as means of energy transfer
to the material to be treated. A further limitation of the scope is that the infrared emitters have
a maximum spectral emission at longer wavelengths than 780 nm in air or vacuum, and are
emitting wideband continuous spectra such as by thermal radiation or high pressure arcs.
IEC 60519-1:2010 defines infrared as radiation within the frequency range between about
400 THz and 300 GHz. This corresponds to the wavelength range between 780 nm and 1 mm
in vacuum. Industrial infrared heating usually uses infrared sources with rated temperatures
between 500 °C and 3 000 °C; the emitted radiation from these sources dominates in the
wavelength range between 780 nm and 10 µm.
Since substantial emission of e.g. blackbody thermal emitters may extend beyond 780 nm or
3 000 nm, the safety aspects of emitted visible light and emission at wavelengths longer than
3 000 nm are also considered in this standard.
This standard is not applicable to:
– infrared installations with lasers or light-emitting diodes (LEDs) as main sources – they are
covered by IEC 62471:2006, IEC 60825-1:2007 [4] and IEC/TR 60825-9:1999 [5];
– appliances for use by the general public;
– appliances for laboratory use – they are covered by IEC 61010-1:2010 [6];
– electroheating installations where resistance heated bare wires, tubes or bars are used as
heating elements, and infrared radiation is not a dominant side effect of the intended use,
covered by IEC 60519-2:2006 [3];
– infrared heating equipment with a nominal combined electrical power of the infrared
emitters of less than 250 W;
– handheld infrared equipment.
Industrial infrared electroheating equipment under the scope of this standard typically uses the
Joule effect for the conversion of electric energy into infrared radiation by one or several
sources. Radiation is then emitted from one or several elements onto the material to be
treated. Such infrared heating elements are in particular:
– thermal infrared emitters in the form of tubular, plate-like or otherwise shaped ceramics
with a resistive element inside;
– infrared quartz glass tube or halogen lamp emitters with a hot filament as a source;
– non insulated elements made from molybdenum disilicide, silicon carbide, graphite, iron-
TM
chromium-aluminium alloys like Kanthal or comparable materials;
– wide-spectrum arc lamps.

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2 Normative references
This clause of Part 1 is applicable except as follows.
Additions:
IEC 60519-1:2010, Safety in electroheating installations – Part 1: General requirements
IEC 62471:2006, Photobiological safety of lamps and lamp systems
ISO 12100:2010, Safety of machinery – General principles for design – Risk assessment and
risk reduction
ISO 13577-1, Industrial furnaces and associated processing equipment – Safety – Part 1:
General requirements
ISO 14159, Safety of machinery – Hygiene requirements for the design of machinery
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
Additions:
3.101
infrared radiation
optical radiation for which the wavelengths are longer than those for visible radiation
Note 1 to entry: The infrared radiation range between 780 nm and 1 mm is commonly subdivided into:
IR-A  780 nm to 1 400 nm, or for a grey emitter 3 450 °C to 1 800 °C surface temperature;
IR-B  1 400 nm to 3 000 nm, or for a grey emitter 1 800 °C to 690 °C surface temperature;
IR-C  3 000 nm to 1 mm, or for a grey emitter less than 690 °C surface temperature.
The temperature corresponds to a spectrum where maximum intensity is at the wavelength of the limit.
These ranges comply with IEC 62471:2006.
Note 2 to entry: In IEC 60050-841:2004, the following terms are defined:
841-24-04 – shortwave infrared radiation or near infrared radiation (780 nm to 2 µm);
841-24-03 – mediumwave infrared radiation or medium infrared radiation (2 µm to 4 µm);
841-24-02 – longwave infrared radiation or far infrared radiation (4 µm to 1 mm).
These terms are not used in this standard.
[SOURCE: IEC 62471:2006, 3.14, modified – Note 1 has been modified and Note 2 added]
3.102
infrared heating
heating consisting in absorption of thermal and optical radiation, mostly infrared radiation,
emitted by especially constructed equipment
[SOURCE: IEC 60050-841:2004, 841-24-05, modified – the definition has been editorially
improved]

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60519-12 © IEC:2013 – 9 –
3.103
infrared installation
infrared electroheating installation
electroheating installation, where processing of the workload is achieved by infrared heating
[SOURCE: IEC 60050-841:2004, 841-24-09, modified – the synonym has been added; the
definition has been shortened]
3.104
infrared emitter
component from which infrared radiation is emitted
Note 1 to entry: This component is usually replaceable.
3.105
infrared source
part of the infrared emitter, where electric energy is converted by the Joule effect into heat or
radiation
3.106
filament
conductive wire or thread of an infrared emitter, in which electric energy is converted into heat
by the Joule effect
[SOURCE: IEC 60050-841:2004, 841-24-27, modified – the definition has been clarified]
3.107
infrared ceramic heater
infrared emitter made of or covered with ceramic material
[SOURCE: IEC 60050-841:2004, 841-24-13, modified – the definition has been shortened]
3.108
tubular infrared emitter
infrared emitter in which one of the basic dimensions is dominant
Note 1 to entry: The emitter can include reflecting means and be straight or bent.
[SOURCE: IEC 60050-841:2004, 841-24-24, modified – the definition has been shortened;
Note 1 has been added]
3.109
infrared plate emitter
infrared emitter in which two of the basic dimensions are dominant
Note 1 to entry: The emitter can include reflecting means and may be flat or curved.
[SOURCE: IEC 60050-841:2004, 841-24-25, modified – the definition has been shortened;
Note 1 has been added]
3.110
infrared quartz emitter
infrared emitter in which the source is inside a quartz glass envelope
TM
Note 1 to entry: Glass envelopes made from hard glasses like Vycor are included.
[SOURCE: IEC 60050-841:2004, 841-24-26, modified – the definition has been shortened;
Note 1 has been added]

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3.111
halogen lamp emitter
infrared emitter with a tungsten filament placed inside a gas tight glass envelope with halogen,
containing atmosphere where the halogen actively transports tungsten from the glass wall to
the tungsten filament
Note 1 to entry: Halogen lamp emitters are typically infrared quartz emitters.
[SOURCE: IEC 60050-841:2004, 841-24-22, modified – the definition has been clarified; Note 1
has been added]
3.112
infrared reflector
passive, non transmitting component which reflects and directs infrared radiation
Note 1 to entry: The reflector can be part of an infrared emitter and can reflect specularly or diffusely.
3.113
infrared refractor
passive, transmitting component that focuses and directs infrared radiation
Note 1 to entry: The refractor can be part of an infrared emitter.
3.114
infrared wavelength converter
element inside the infrared installation that is heated up by infrared radiation during normal
operation to a temperature, where its own emitted radiation participates in heating up the
workload
Note 1 to entry: The spectrum of a wavelength converter has a substantially longer wavelength than the
wavelength of major emission of the infrared emitters.
3.115
infrared module
component housing one or more infrared emitters
Note 1 to entry: The module can include reflectors, refractors, filters, or other means for protecting the emitter as
well as cooling devices.
3.116
infrared shield
opaque component designed to stop infrared radiation from being transmitted through it
3.117
protection shield
shield used for the radiation protection of people or equipment
3.118
filter
partially transparent, partially absorbing or reflecting component, designed to reduce
transmission at selected wavelength
3.119
infrared barrier
physical barrier, which limits access to areas of potentially hazardous irradiation, and can only
be removed with the aid of a tool
3.120
infrared enclosure
structure intended to confine the infrared radiation to a defined region

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60519-12 © IEC:2013 – 11 –
EXAMPLE  Closed treatment chamber, infrared shield, infrared reflector.
Note 1 to entry: Infrared barriers mounted outside the infrared enclosure are not considered as part of it.
3.121
rated temperature
maximum surface temperature of the infrared filament or infrared emitter at rated voltage
Note 1 to entry: This temperature is used for the determination of the spectral emission of thermal infrared
emitters.
Note 2 to entry: The temperature applies under conditions of normal operation.
4 Classification of electroheating equipment
This clause of Part 1 is applicable.
5 General requirements
This clause of Part 1 is applicable except as follows.
5.1.5
Addition:
Bare conductors shall be placed in such a way that they cannot come into contact with persons,
the workload, or the workload handling equipment under nor
...