SIST EN IEC 60519-12:2018
(Main)Safety in installations for electroheating and electromagnetic processing - Part 12: Particular requirements for infrared electroheating
Safety in installations for electroheating and electromagnetic processing - Part 12: Particular requirements for infrared electroheating
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 workload. 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 60519-1:2015 defines infrared as radiation within the frequency range between 400 THz and 300 GHz. This corresponds to a wavelength range between 780 nm and 10 μm in vacuum. Industrial infrared heating commonly uses thermal 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 thermal emitters can extend either to wavelengths below 780 nm or above 3 000 nm, the safety aspects of emitted visible light and emission at wavelengths longer than 3 000 nm are also considered in this document. 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 and IEC 60825-1:2014; - appliances for use by the general public; - appliances for laboratory use - they are covered by IEC 61010-1:2010; - 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; - 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, ironchromium- aluminium alloys, refractory metals or comparable materials; - wide-spectrum arc lamps.
Sicherheit in Elektrowärmeanlagen und Anlagen für elektromagnetische Bearbeitungsprozesse - Teil 12: Besondere Anforderungen an Infrarot-Elektrowärmeanlagen
Sécurité dans les installations destinées au traitement électrothermique et électromagnétique - Partie 12: Exigences particulières pour chauffage électrique par rayonnement infrarouge
L’IEC 60519-12:2016 spécifie les exigences de sécurité concernant les équipements et installations électrothermiques industriels avec lesquels le rayonnement infrarouge, produit habituellement par des émetteurs de rayonnement infrarouge, prédomine véritablement sur la convection ou la conduction thermique comme moyen de transfert d'énergie à la charge de travail. Une limite supplémentaire du domaine d'application se traduit par le fait que les émetteurs de rayonnement infrarouge ont une émission spectrale maximale à des longueurs d’onde plus grandes que 780 nm dans l'air ou le vide, et émettent des spectres continus à large bande tels que ceux émis par un rayonnement thermique ou des arcs à haute pression. Cette deuxième édition annule et remplace la première édition parue en 2013. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a. la structure du présent document a été alignée sur celle de l’IEC 60519-1:2015;
b. les termes/définitions, les références normatives ainsi que la bibliographie ont été mis à jour et complétés;
c. toutes les exigences et le contenu de l’IEC 60519-12:2013 repris dans l’IEC 60519-1:2015 ont été supprimés pour éviter les répétitions.
Varnost pri električnih grelnih inštalacijah in elektromagnetni obdelavi - 12. del: Posebne zahteve za inštalacije z infrardečim električnim ogrevanjem
IEC 60519 določa posebne varnostne zahteve za industrijsko električno grelno opremo in inštalacije, v katerih infrardeče sevanje, ki ga ponavadi ustvarijo infrardeča sevala, občutno presega toplotno konvekcijo ali toplotno prevodnost, kar zadeva prenos energije v delovno obremenitev. Dodatna omejitev področja uporabe na infrardeča sevala, ki imajo najvišjo spektralno emisijo pri valovnih dolžinah, daljših od 780 nm, v zraku ali vakuumu in oddajajo neprekinjene širokopasovne spektre, kakor pri lokih toplotnega sevanja ali visokega tlaka. Standard IEC 60519-1:2015 opredeljuje infrardeče sevanje kot sevanje na frekvenčnem območju med 400 THz in 300 GHz. To ustreza razponu valovnih dolžin od 780 nm do 10 μm v vakuumu. Pri industrijskem infrardečem ogrevanju se ponavadi uporabljajo viri infrardečega sevanja z nazivnimi temperaturami med 500 in 3000 °C; sevanje, oddano iz teh virov, je predvsem v razponu valovnih dolžin od 780 nm do 10 μm. Znatni del emisij iz toplotnih seval lahko sega pod 780 nm ali nad 3000 nm, zato so v tem dokumentu upoštevani tudi varnostni vidiki za oddano vidno svetlobo in emisije pri valovnih dolžinah, daljših od 3000 nm. Ta standard se ne uporablja za: – inštalacije z glavnim virom infrardečega sevanja v obliki laserjev ali svetlečih diod (LED) – zajemata jih standarda IEC 62471:2006 in IEC 60825-1:2014; – aparati za splošno uporabo; – aparati za laboratorijsko uporabo – zajema jih standard IEC 61010-1:2010; – inštalacije za električno ogrevanje, v katerih se kot grelni elementi uporabljajo uporovne žice, cevi ali palice in infrardeče sevanje ni prevladujoč stranski učinek predvidene uporabe, ki jih zajema standard IEC 60519-2:2006; – oprema z infrardečim ogrevanjem z nominalnim združenim električnim tokom infrardečih seval, manjšim od 250 W; – ročna oprema z infrardečim sevanjem. Industrijska oprema z infrardečim električnim ogrevanjem, ki spada na področje uporabe tega standarda, običajno v skladu z Joulovim zakonom pretvarja električno energijo v infrardeče sevanje iz enega ali več virov. Eden ali več elementov nato oddajo sevanje v material, ki bo obdelan. Takšni elementi infrardečega ogrevanja so predvsem: – toplotna infrardeča sevala iz cevaste, ploščate ali poljubno oblikovane keramike z upornim elementom v notranjosti; – infrardeča sevala z vročo žarilno nitko kot virom sevanja, tj. rešetke iz kvarčnega stekla ali halogenske sijalke; – neizolirani elementi iz molibdenovega disilicida, silicijevega karbida, grafita, železo-kromovo-aluminijeve zlitine, težkotaljivih materialov ali primerljivih materialov; – električne sijalke širokega spektra.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60519-12:2018
01-maj-2018
Nadomešča:
SIST EN 60519-12:2013
Varnost pri električnih grelnih inštalacijah in elektromagnetni obdelavi - 12. del:
Posebne zahteve za inštalacije z infrardečim električnim ogrevanjem
Safety in installations for electroheating and electromagnetic processing - Part 12:
Particular requirements for infrared electroheating
Ta slovenski standard je istoveten z: EN IEC 60519-12:2018
ICS:
97.100.10 Električni grelniki Electric heaters
SIST EN IEC 60519-12:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 60519-12:2018
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SIST EN IEC 60519-12:2018
EUROPEAN STANDARD EN IEC 60519-12
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 25.180.10 Supersedes EN 60519-12:2013
English Version
Safety in installations for electroheating and electromagnetic
processing - Part 12: Particular requirements for infrared
electroheating
(IEC 60519-12:2016)
Sécurité dans les installations destinées au traitement Sicherheit in Elektrowärmeanlagen und Anlagen für
électrothermique et électromagnétique - Partie 12: elektromagnetische Bearbeitungsprozesse - Teil 12:
Exigences particulières pour chauffage électrique par Besondere Anforderungen an Infrarot-Elektrowärmeanlagen
rayonnement infrarouge (IEC 60519-12:2016)
(IEC 60519-12:2016)
This European Standard was approved by CENELEC on 2017-01-19. 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, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60519-12:2018 E
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SIST EN IEC 60519-12:2018
EN IEC 60519-12:2018 (E)
European foreword
The text of document 27/967/CDV, future edition 2 of IEC 60519-12, prepared by IEC/TC 27
"Industrial electroheating and electromagnetic processing" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 60519-12:2018.
The following dates are fixed:
• latest date by which the document has to be (dop) 2018-09-02
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2021-03-02
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60519-12:2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60519-12:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60519-2:2006 NOTE Harmonized as EN 60519-2:2006 (not modified).
IEC 60825-1:2014 NOTE Harmonized as EN 60825-1:2014 (not modified).
IEC 61010-1:2010 NOTE Harmonized as EN 61010-1:2010 (not modified).
2
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EN IEC 60519-12:2018 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60519-1 2015 Safety in installations for electroheating EN 60519-1 2015
and electromagnetic processing -- Part 1:
General requirements
3
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SIST EN IEC 60519-12:2018
IEC 60519-12
®
Edition 2.0 2016-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety in installations for electroheating and electromagnetic processing –
Part 12: Particular requirements for infrared electroheating
Sécurité dans les installations destinées au traitement électrothermique et
électromagnétique –
Partie 12: Exigences particulières pour chauffage électrique par rayonnement
infrarouge
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.180.10 ISBN 978-2-8322-3709-0
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, definitions and abbreviations . 8
4 Classification and sub-division . 10
5 Risk assessment . 11
6 General provisions. 11
7 Protection against electric shock . 11
8 Protection against hazards caused by electric or magnetic nearfields . 11
9 Protection against hazards from radiation . 11
10 Protection against hazards from thermal influences . 13
11 Protection against hazards from fire . 13
12 Protection against hazards from fluids . 13
13 Specific requirements for components and subassemblies . 13
14 Control of the installation or equipment . 13
15 Protection against mechanical hazards . 13
16 Protection against hazards resulting from use . 13
17 Protection against other hazards . 13
18 Verification and testing . 13
19 Information for use . 14
Annex A (informative) List of significant hazards . 15
Annex B (informative) Electric and magnetic fields, touch currents – limits of
exposure hazards . 16
Annex C (informative) Optical radiation – limits of exposure hazards . 17
Annex D (informative) Limits for exposure hazards – noise and vibration . 19
Annex E (normative) Provisions concerning EMC . 20
Annex F (normative) Marking and warning . 21
Annex G (informative) Guidelines on using this standard . 22
Annex H (informative) Connection with ISO 13577 series . 23
Annex AA (informative) Procedure for reducing risk from infrared radiation . 24
Annex BB (informative) Simplified measurement method for the assessment of
thermal infrared radiation exposure . 26
Annex CC (informative) Measurement device for total irradiance . 32
Bibliography . 33
Figure C.101 – Risk groups and exposure limits (refer to Table C.1 of
IEC 60519-1:2015) depending on time of exposure and irradiation. 17
Figure C.102 – Risk groups and exposure limits (refer to Table C.2 of
IEC 60519-1:2015) depending on time of exposure and radiance . 18
Figure BB.1 – Factors for converting measured total irradiance into band irradiance,
depending on surface temperature of a grey emitter generating the signal . 28
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Figure BB.2 – Factor for converting measured total radiance into relevant retinal
thermal radiance, depending on surface temperature of a grey emitter generating the
signal . 31
Figure CC.1 – Example of a detector for total irradiance measurement . 32
Table AA.1 – Procedure for assessment and reduction of radiation exposure through
design . 25
Table BB.1 – Measurement procedure . 26
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY IN INSTALLATIONS FOR ELECTROHEATING
AND ELECTROMAGNETIC PROCESSING –
Part 12: Particular requirements for infrared electroheating
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
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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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.
This second edition cancels and replaces the first edition published in 2013. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the structure has been redrafted according to IEC 60519-1:2015;
b) terms/definitions, normative references and bibliography have been updated and
completed;
c) all requirements and content from IEC 60519-12:2013 that have been included in
IEC 60519-1:2015 have been removed to avoid any duplication.
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IEC 60519-12:2016 © IEC 2016 – 5 –
The text of this standard is based on the following documents:
CDV Report on voting
27/967/CDV 27/982/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document 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
installations for electroheating and electromagnetic processing, can be found on the IEC
website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
The clauses of parts of the IEC 60519 series (hereinafter called Particular Requirements)
supplement or modify the corresponding clauses of IEC 60519-1:2015 (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.
In this standard, the following print types are used:
• requirements and definitions: in roman type;
• NOTES: in smaller roman type;
• terms used throughout this standard which have been defined in Clause 3: in bold type.
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INTRODUCTION
The scope of this standard covers a broad range of types and designs of infrared equipment
which are used for many different purposes. This standard is intended to cover all industrial
infrared equipment types, with some few exceptions provided in Clause 1.
Many other types of electroheating equipment emit infrared radiation of hazardous levels,
therefore IEC 60519-1:2015 provides all general requirements addressing optical radiation
and this document provides specific considerations for infrared equipment and helpful
methods.
With reference to IEC 60519-2:2006 it has been agreed in TC 27 that this standard covers all
kinds of infrared emission hazards of industrial electroheating installations and provisions not
given in IEC 60519-1:2015.
The discussion of infrared radiation assessment 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.
The other principles for covering the risks caused by infrared radiation were:
• the manufacturer usually does not employ 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;
• the scope of IEC 62471:2006 is limited to lamps but is applicable for other light sources.
Therefore, core aspects were adapted from that standard and if possible simplified for this
document.
• figures illustrating the classes defined in IEC 62471:2006 and listed in IEC 60519-1:2015
are included;
• relevant documents of American National Standard Institute/Illuminating Engineering
Society of North America, the ANSI/IESNA RP 27 series, are based on the ICNIRP
recommendations as well. They provide no extra or contradictory material with regard to
this standard and its references.
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IEC 60519-12:2016 © IEC 2016 – 7 –
SAFETY IN INSTALLATIONS FOR ELECTROHEATING
AND ELECTROMAGNETIC PROCESSING –
Part 12: Particular requirements for infrared electroheating
1 Scope and object
1.1 Scope
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 workload. 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 60519-1:2015 defines infrared as radiation within the frequency range between 400 THz
and 300 GHz. This corresponds to a wavelength range between 780 nm and 10 µm in
vacuum. Industrial infrared heating commonly uses thermal 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 thermal emitters can extend either to wavelengths below
780 nm or above 3 000 nm, the safety aspects of emitted visible light and emission at
wavelengths longer than 3 000 nm are also considered in this document.
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 and IEC 60825-1:2014;
• appliances for use by the general public;
• appliances for laboratory use – they are covered by IEC 61010-1:2010;
• 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;
• 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;
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• non insulated elements made from molybdenum disilicide, silicon carbide, graphite, iron-
chromium-aluminium alloys, refractory metals or comparable materials;
• wide-spectrum arc lamps.
1.2 Object
This clause of Part 1 is applicable.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60519-1:2015, Safety in installations for electroheating and electromagnetic processing –
Part 1: General requirements
3 Terms, definitions and abbreviations
This clause of Part 1 is applicable except as follows.
Addition:
3.1 General concepts
3.1.101
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]
3.1.102
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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3.2 Equipment and state of equipment
3.2.103
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 and
the definition has been shortened.]
3.2.101
infrared emitter
component from which infrared radiation is emitted
Note 1 to entry: This component is usually replaceable.
3.2.102
infrared source
part of the infrared emitter, where electric energy is converted by the Joule effect into heat or
radiation
3.2.103
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.]
3.2.104
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.]
3.2.105
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
and Note 1 has been added.]
3.2.106
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 can be flat or curved.
[SOURCE: IEC 60050-841:2004, 841-24-25, modified – The definition has been shortened
and Note 1 has been added.]
3.2.107
infrared quartz emitter
infrared emitter in which the source is inside a quartz glass envelope
Note 1 to entry: Glass envelopes made from hard glasses comparable to quartz glass are included.
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[SOURCE: IEC 60050-841:2004, 841-24-26, modified – The definition has been shortened
and Note 1 has been added.]
3.2.108
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
[SOURCE: IEC 60050-841:2004, 841-24-22, modified – The definition has been clarified.]
3.2.109
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 cause specular or diffuse reflection or a
combination of both.
3.2.110
infrared refractor
passive, transmitting component that focuses and directs infrared radiation
Note 1 to entry: The refractor can be part of an infrared emitter.
3.2.111
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.
3.2.112
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.
3.2.113
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.
3.3 Parts and accessories
3.3.101
filter
partially transparent, partially absorbing or reflecting component, designed to reduce
transmission at selected wavele
...
SLOVENSKI STANDARD
SIST EN 60519-12:2018
01-maj-2018
1DGRPHãþD
SIST EN 60519-12:2013
9DUQRVWSULHOHNWULþQLKJUHOQLKLQãWDODFLMDKLQHOHNWURPDJQHWQLREGHODYLGHO
3RVHEQH]DKWHYH]DLQãWDODFLMH]LQIUDUGHþLPHOHNWULþQLPRJUHYDQMHP
Safety in installations for electroheating and electromagnetic processing - Part 12:
Particular requirements for infrared electroheating
Ta slovenski standard je istoveten z: EN IEC 60519-12:2018
ICS:
97.100.10 (OHNWULþQLJUHOQLNL Electric heaters
SIST EN 60519-12:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60519-12:2018
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SIST EN 60519-12:2018
EUROPEAN STANDARD EN IEC 60519-12
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 25.180.10 Supersedes EN 60519-12:2013
English Version
Safety in installations for electroheating and electromagnetic
processing - Part 12: Particular requirements for infrared
electroheating
(IEC 60519-12:2016)
Sécurité dans les installations destinées au traitement Sicherheit in Elektrowärmeanlagen und Anlagen für
électrothermique et électromagnétique - Partie 12: elektromagnetische Bearbeitungsprozesse - Teil 12:
Exigences particulières pour chauffage électrique par Besondere Anforderungen an Infrarot-Elektrowärmeanlagen
rayonnement infrarouge (IEC 60519-12:2016)
(IEC 60519-12:2016)
This European Standard was approved by CENELEC on 2017-01-19. 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, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60519-12:2018 E
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SIST EN 60519-12:2018
EN IEC 60519-12:2018 (E)
European foreword
The text of document 27/967/CDV, future edition 2 of IEC 60519-12, prepared by IEC/TC 27
"Industrial electroheating and electromagnetic processing" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 60519-12:2018.
The following dates are fixed:
• latest date by which the document has to be (dop) 2018-09-02
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2021-03-02
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60519-12:2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60519-12:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60519-2:2006 NOTE Harmonized as EN 60519-2:2006 (not modified).
IEC 60825-1:2014 NOTE Harmonized as EN 60825-1:2014 (not modified).
IEC 61010-1:2010 NOTE Harmonized as EN 61010-1:2010 (not modified).
2
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SIST EN 60519-12:2018
EN IEC 60519-12:2018 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60519-1 2015 Safety in installations for electroheating EN 60519-1 2015
and electromagnetic processing -- Part 1:
General requirements
3
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SIST EN 60519-12:2018
IEC 60519-12
®
Edition 2.0 2016-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety in installations for electroheating and electromagnetic processing –
Part 12: Particular requirements for infrared electroheating
Sécurité dans les installations destinées au traitement électrothermique et
électromagnétique –
Partie 12: Exigences particulières pour chauffage électrique par rayonnement
infrarouge
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.180.10 ISBN 978-2-8322-3709-0
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, definitions and abbreviations . 8
4 Classification and sub-division . 10
5 Risk assessment . 11
6 General provisions. 11
7 Protection against electric shock . 11
8 Protection against hazards caused by electric or magnetic nearfields . 11
9 Protection against hazards from radiation . 11
10 Protection against hazards from thermal influences . 13
11 Protection against hazards from fire . 13
12 Protection against hazards from fluids . 13
13 Specific requirements for components and subassemblies . 13
14 Control of the installation or equipment . 13
15 Protection against mechanical hazards . 13
16 Protection against hazards resulting from use . 13
17 Protection against other hazards . 13
18 Verification and testing . 13
19 Information for use . 14
Annex A (informative) List of significant hazards . 15
Annex B (informative) Electric and magnetic fields, touch currents – limits of
exposure hazards . 16
Annex C (informative) Optical radiation – limits of exposure hazards . 17
Annex D (informative) Limits for exposure hazards – noise and vibration . 19
Annex E (normative) Provisions concerning EMC . 20
Annex F (normative) Marking and warning . 21
Annex G (informative) Guidelines on using this standard . 22
Annex H (informative) Connection with ISO 13577 series . 23
Annex AA (informative) Procedure for reducing risk from infrared radiation . 24
Annex BB (informative) Simplified measurement method for the assessment of
thermal infrared radiation exposure . 26
Annex CC (informative) Measurement device for total irradiance . 32
Bibliography . 33
Figure C.101 – Risk groups and exposure limits (refer to Table C.1 of
IEC 60519-1:2015) depending on time of exposure and irradiation. 17
Figure C.102 – Risk groups and exposure limits (refer to Table C.2 of
IEC 60519-1:2015) depending on time of exposure and radiance . 18
Figure BB.1 – Factors for converting measured total irradiance into band irradiance,
depending on surface temperature of a grey emitter generating the signal . 28
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Figure BB.2 – Factor for converting measured total radiance into relevant retinal
thermal radiance, depending on surface temperature of a grey emitter generating the
signal . 31
Figure CC.1 – Example of a detector for total irradiance measurement . 32
Table AA.1 – Procedure for assessment and reduction of radiation exposure through
design . 25
Table BB.1 – Measurement procedure . 26
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY IN INSTALLATIONS FOR ELECTROHEATING
AND ELECTROMAGNETIC PROCESSING –
Part 12: Particular requirements for infrared electroheating
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 60519-12 has been prepared by IEC technical committee 27:
Industrial electroheating and electromagnetic processing.
This second edition cancels and replaces the first edition published in 2013. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the structure has been redrafted according to IEC 60519-1:2015;
b) terms/definitions, normative references and bibliography have been updated and
completed;
c) all requirements and content from IEC 60519-12:2013 that have been included in
IEC 60519-1:2015 have been removed to avoid any duplication.
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SIST EN 60519-12:2018
IEC 60519-12:2016 © IEC 2016 – 5 –
The text of this standard is based on the following documents:
CDV Report on voting
27/967/CDV 27/982/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document 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
installations for electroheating and electromagnetic processing, can be found on the IEC
website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
The clauses of parts of the IEC 60519 series (hereinafter called Particular Requirements)
supplement or modify the corresponding clauses of IEC 60519-1:2015 (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.
In this standard, the following print types are used:
• requirements and definitions: in roman type;
• NOTES: in smaller roman type;
• terms used throughout this standard which have been defined in Clause 3: in bold type.
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INTRODUCTION
The scope of this standard covers a broad range of types and designs of infrared equipment
which are used for many different purposes. This standard is intended to cover all industrial
infrared equipment types, with some few exceptions provided in Clause 1.
Many other types of electroheating equipment emit infrared radiation of hazardous levels,
therefore IEC 60519-1:2015 provides all general requirements addressing optical radiation
and this document provides specific considerations for infrared equipment and helpful
methods.
With reference to IEC 60519-2:2006 it has been agreed in TC 27 that this standard covers all
kinds of infrared emission hazards of industrial electroheating installations and provisions not
given in IEC 60519-1:2015.
The discussion of infrared radiation assessment 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.
The other principles for covering the risks caused by infrared radiation were:
• the manufacturer usually does not employ 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;
• the scope of IEC 62471:2006 is limited to lamps but is applicable for other light sources.
Therefore, core aspects were adapted from that standard and if possible simplified for this
document.
• figures illustrating the classes defined in IEC 62471:2006 and listed in IEC 60519-1:2015
are included;
• relevant documents of American National Standard Institute/Illuminating Engineering
Society of North America, the ANSI/IESNA RP 27 series, are based on the ICNIRP
recommendations as well. They provide no extra or contradictory material with regard to
this standard and its references.
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IEC 60519-12:2016 © IEC 2016 – 7 –
SAFETY IN INSTALLATIONS FOR ELECTROHEATING
AND ELECTROMAGNETIC PROCESSING –
Part 12: Particular requirements for infrared electroheating
1 Scope and object
1.1 Scope
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 workload. 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 60519-1:2015 defines infrared as radiation within the frequency range between 400 THz
and 300 GHz. This corresponds to a wavelength range between 780 nm and 10 µm in
vacuum. Industrial infrared heating commonly uses thermal 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 thermal emitters can extend either to wavelengths below
780 nm or above 3 000 nm, the safety aspects of emitted visible light and emission at
wavelengths longer than 3 000 nm are also considered in this document.
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 and IEC 60825-1:2014;
• appliances for use by the general public;
• appliances for laboratory use – they are covered by IEC 61010-1:2010;
• 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;
• 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;
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• non insulated elements made from molybdenum disilicide, silicon carbide, graphite, iron-
chromium-aluminium alloys, refractory metals or comparable materials;
• wide-spectrum arc lamps.
1.2 Object
This clause of Part 1 is applicable.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60519-1:2015, Safety in installations for electroheating and electromagnetic processing –
Part 1: General requirements
3 Terms, definitions and abbreviations
This clause of Part 1 is applicable except as follows.
Addition:
3.1 General concepts
3.1.101
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]
3.1.102
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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3.2 Equipment and state of equipment
3.2.103
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 and
the definition has been shortened.]
3.2.101
infrared emitter
component from which infrared radiation is emitted
Note 1 to entry: This component is usually replaceable.
3.2.102
infrared source
part of the infrared emitter, where electric energy is converted by the Joule effect into heat or
radiation
3.2.103
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.]
3.2.104
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.]
3.2.105
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
and Note 1 has been added.]
3.2.106
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 can be flat or curved.
[SOURCE: IEC 60050-841:2004, 841-24-25, modified – The definition has been shortened
and Note 1 has been added.]
3.2.107
infrared quartz emitter
infrared emitter in which the source is inside a quartz glass envelope
Note 1 to entry: Glass envelopes made from hard glasses comparable to quartz glass are included.
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[SOURCE: IEC 60050-841:2004, 841-24-26, modified – The definition has been shortened
and Note 1 has been added.]
3.2.108
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
[SOURCE: IEC 60050-841:2004, 841-24-22, modified – The definition has been clarified.]
3.2.109
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 cause specular or diffuse reflection or a
combination of both.
3.2.110
infrared refractor
passive, transmitting component that focuses and directs infrared radiation
Note 1 to entry: The refractor can be part of an infrared emitter.
3.2.111
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.
3.2.112
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.
3.2.113
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.
3.3 Parts and accessories
3.3.101
filter
partially transparent, partially absorbing or reflecting component, designed to reduce
transmission at selected wavelength
4 Classification and sub-division
...
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