SIST EN 50499:2021

SLOVENSKI STANDARD
SIST EN 50499:2021
01-junij-2021
Nadomešča:
SIST EN 50499:2009
Postopki ocenjevanja izpostavljenosti delavcev elektromagnetnim sevanjem
Procedure for the assessment of the exposure of workers to electromagnetic fields
Verfahren für die Beurteilung der Exposition von Arbeitnehmern gegenüber
elektromagnetischen Feldern
Procédure pour l'évaluation de l'exposition des travailleurs aux champs
électromagnétiques
Ta slovenski standard je istoveten z: EN 50499:2019
ICS:
13.280 Varstvo pred sevanjem Radiation protection
17.240 Merjenje sevanja Radiation measurements
SIST EN 50499:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50499:2021

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SIST EN 50499:2021


EUROPEAN STANDARD EN 50499

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2019
ICS 17.240 Supersedes EN 50499:2008 and all of its amendments
and corrigenda (if any)
English Version
Procedure for the assessment of the exposure of workers to
electromagnetic fields
Procédure pour l'évaluation de l'exposition des travailleurs Verfahren für die Beurteilung der Exposition von
aux champs électromagnétiques Arbeitnehmern gegenüber elektromagnetischen Feldern
This European Standard was approved by CENELEC on 2019-08-20. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 50499:2019 E

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Contents
European foreword .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 General considerations on assessment .8
4.1 Introduction .8
4.2 Overview of risk assessment procedure .8
4.3 Indirect effects . 14
4.4 Uncertainty for assessments using Clauses 7, 8 and 9 . 15
5 Initial assessment . 15
6 Workplaces likely to require further assessment . 19
7 Standards for specific workplaces . 20
8 Methodology for assessing workplace exposure by comparison with the action levels . 20
9 Methodology for assessing workplace exposure by comparison with the exposure limit values . 21
10 Methodology for taking measures . 22
11 End of assessment . 23
Annex A (normative) Other health and safety issues: indirect effects of fields and workers at
particular risk . 24
A.1 Introduction . 24
A.2 Indirect effects of fields on workers . 24
A.3 Indirect effects on workers with medical devices . 24
A.4 Indirect effects on equipment and materials . 25
A.5 Pregnant workers . 25
A.6 Zoning. 25
Annex B (informative) Documenting the risk assessment . 26
B.1 General . 26
B.2 Form 1: Workplace containing only equipment in Table 1 . 26
B.2.1 General information . 26
B.2.2 Assessment . 26
B.3 Form 2: Workplace requiring detailed risk assessment . 27
B.3.1 General information . 27
B.3.2 Assessment . 27
Annex C (informative) CE-marked equipment. 28
C.1 CE-marked equipment . 28
C.2 Identifying equipment that has been assessed . 29
Annex D (informative) Simultaneous exposure to multiple frequencies and multiple sources . 30
D.1 Terms and definitions . 30
D.1.1 Exposure Ratio (ER or ER %) . 30
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D.1.2 Total Exposure Ratio (TER or TER %) . 30
D.2 The TER approach . 30
D.2.1 Explanation . 30
D.2.2 ER for a single item of equipment . 31
D.2.2.1 Obtaining or calculating the ER for a single item of equipment . 31
D.2.2.2 Calculating single equipment ER from measured emission or exposure levels for non-
thermal effects (below 10 MHz) . 31
D.2.2.2.1 Simultaneous exposure to multiple frequency fields . 31
D.2.2.2.2 Weighted peak method in time domain . 31
D.2.2.3 Calculating single equipment ER from measured emission or exposure levels for
thermal effects (above 100 kHz) . 32
D.2.3 Combining the separate equipment ERs into a TER . 33
D.2.3.1 Simple assessment of the TER . 33
D.2.3.2 Assessment of low frequency (non-thermal effects) . 33
D.2.3.3 Assessment of high frequency (thermal effects) . 33
D.2.3.4 Assessment of intermediate frequencies 100 kHz to 10 MHz, or if the applicable
frequency of measurement assessments covers both the stimulation effects and thermal
effects, or is unknown . 34
D.3 Example of multiple exposure using separate TER assessments . 34
Annex E (informative) Zoning . 35
E.1 Introduction . 35
E.2 Workplace zones . 35
E.3 Implementation of zoning . 35
Bibliography . 37
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European foreword
This document (EN 50499:2019) has been prepared by CLC/TC 106X, “Electromagnetic fields in the human
environment”.
The following dates are fixed:
• latest date by which this document has (dop) 2020-08-20
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2022-08-20
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50499:2008 and all of its amendments and corrigenda (if any).
EN 50499:2019 includes the following significant technical changes with respect to EN 50499:2008:
— the replacement of directive 2004/40/EC by directive 2013/35/UE. The requirements in the document
were modified accordingly, as for example the assessment process.
The latest editions of standards of basic and generic standards was also taken into account, for example in
the annex D for multiple frequencies
This standard is intended to be a standard under which other standards related to the assessment of a
workplace can be used.
The approaches outlined in this standard, are intended to be simple, allowing most employers to make an
assessment with the minimum of technical knowledge and effort.
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.
This document has been prepared under a mandate given to CENELEC by the European Commission and
the European Free Trade Association.
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1 Scope
The scope of this document is to provide a general procedure for the assessment of workers’ exposure to
electric, magnetic and electromagnetic fields in a workplace in order to determine compliance with exposure
limit values and/or action levels as stated in European Directive 2013/35/EU.
The purpose of this document is to
— specify how to perform an initial assessment of the levels of workers' exposure to electromagnetic fields
(EMF), if necessary, including specific exposure assessment of such levels by measurements and/or
calculations,
— determine whether it is necessary to carry out a detailed risk assessment of EMF exposure.
This document can be used by employers for the risk assessment and, where required, measurement and/or
calculation of the exposure of workers. Based on specific workplace and other standards, it can be
determined whether preventive measures/actions have to be taken to comply with the provisions of the
Directive.
The frequencies covered are from 0 Hz to 300 GHz.
NOTE 1 This document relates to the exposure limits as specified in the Directive 2013/35/EU. It is intended to protect
workers from risks to their health and safety arising or likely to arise from exposure to electromagnetic fields (0 Hz to
300 GHz) during their work. However, this and other Directives can include additional measures for the protection of
specific groups of workers and/or specific workplaces for which the employer is required to investigate other protective
measures as a part of the overall risk assessment. See Annex A.
NOTE 2 Directive 2013/35/EU has been transposed into national legislation in all the EU member countries. It is
intended that users of this standard consult the national legislation related to this transposition in order to identify the
national regulations and requirements. These national regulations and requirements can have additional requirements
that are not covered by this standard.
2 Normative references
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.
Council Recommendation 1999/519/EC of 12 July 1999, on the limitation of exposure of the general public
to electromagnetic fields (0 Hz to 300 GHz), Official Journal, L199, of 1999-7-30, p.59-70
Directive 2013/35/EU of 26 June 2013, on the minimum health and safety requirements regarding the
exposure of workers to the risks arising from physical agents (electromagnetic fields). Official Journal, L179,
of 2013-6-29, p. 1–21
1
EN 50413:—, Basic standard on measurement and calculation procedures for human exposure to electric,
magnetic and electromagnetic fields (0 Hz - 300 GHz)
EN 50496, Determination of workers’ exposure to electromagnetic fields and assessment of risk at a
broadcast site
EN 50647:2017, Basic standard for the evaluation of workers’ exposure to electric and magnetic fields from
equipment and installations for the production, transmission and distribution of electricity
EN 50663:2017, Generic standard for assessment of low power electronic and electrical equipment related
to human exposure restrictions for electromagnetic fields (10 MHz - 300 GHz)

1
Under preparation. Stage at the time of publication: FprEN 50413:2019.
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EN 50664:2017, Generic standard to demonstrate the compliance of equipment used by workers with limits
on exposure to electromagnetic fields (0 Hz - 300 GHz), when put into service or in situ
EN 60601-2-33:2010/A2:2015, Medical electrical equipment – Part 2-33: Particular requirements for the
basic safety and essential performance of magnetic resonance equipment for medical diagnosis
(IEC 60601-2-33:2010/A2:2015)
EN 62232:2017, Determination of the RF field strength, power density and SAR in the vicinity of
radiocommunication base stations for the purpose of evaluating human exposure (IEC 62232)
2
EN IEC 62311:—, Assessment of electronic and electrical equipment related to human exposure restrictions
for electromagnetic fields (0 Hz - 300 GHz) (IEC 62311)
EN 62479:2010, Assessment of the compliance of low power electronic and electrical equipment with the
basic restrictions related to human exposure to electromagnetic fields (10 MHz to 300 GHz) (IEC 62479)
EN 62822-2:2016, Electric welding equipment – Assessment of restrictions related to human exposure to
electromagnetic fields (0 Hz to 300 GHz) – Part 2: Arc welding equipment
EN IEC 62822-3:2018, Electric welding equipment – Assessment of restrictions related to human exposure
to electromagnetic fields (0 Hz to 300 GHz) – Part 3: Resistance welding equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
action levels
ALs
operational levels of directly measurable parameters provided in terms of electric field strength (E), magnetic
field strength (H), magnetic flux density (B) and power density (S), contact current and limb induced current
established for the purpose of simplifying the process of demonstrating the compliance with relevant ELVs
or, where appropriate, to take relevant protection or prevention measures specified in Directive 2013/35/EU
3.1.1
low ALs
action levels which relate to the specific protection or prevention measures specified in
Directive 2013/35/EU
action levels which relate to the sensory effects ELVs
Note 1 to entry: the values of the low ALs are given in Table B.1 o Directive f2013/35/EU for electric field.
Note 2 to entry: The Low AL for external electric field is based both on limiting the internal electric field below ELVs and
on limiting spark discharges in the working environment.
Note 3 to entry: the values of the low ALs are given in Table B.2 for magnetic field.

2
Under preparation. Stage at the time of publication: FprEN IEC 62311:2019.
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3.1.2
high ALs
action levels which relate to the specific protection or prevention measures specified in
Directive 2013/35/EU
action levels which relate to the health effects ELVs
Note 1 to entry: the values of the high ALs are given in Table B.1 of Directive 2013/35/EU for electric field.
Note 2 to entry: Below the High AL, the internal electric field does not exceed ELVs and annoying spark discharges are
prevented, provided that the relevant protection measures are taken.
Note 3 to entry: the values of the high ALs are given in Table B.2 for magnetic field.
3.2
duty factor
ratio of pulse duration to the pulse period of a periodic pulse train
Note 1 to entry: A duty factor can also be considered as a measure of the temporal transmission characteristic of an
intermittently transmitting RF source such as a paging antenna by dividing average transmission duration by the average
period for transmissions.
Note 2 to entry: A duty factor of 1,0 corresponds to continuous operation.
[SOURCE: EN IEC 62311:—]
3.3
electromagnetic fields
static electric, static magnetic and time-varying electric, magnetic and electromagnetic fields with frequencies
up to 300 GHz
[SOURCE: Directive 2013/35/EU]
3.4
employer
natural or legal person who has an employment relationship with the worker and has responsibility for the
undertaking and/or establishment
[SOURCE: Directive 89/391/EEC]
3.5
equipment
source of electromagnetic emission, including devices, products, instrumentation, installations and
prototypes under development
3.6
exposure
phenomenon occurring whenever and wherever a person is subjected to external electromagnetic fields or
to contact current
3.7
exposure limits
guideline or restriction values on exposure that are given in international or national standards, guidelines or
directives on human exposure to electromagnetic fields
Note 1 to entry: For Directive 2013/35/EU the exposure limits are the action levels and the exposure limit values and
also the other specific requirements in that directive to avoid other risks related to workplace exposure to electromagnetic
fields.
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3.8
exposure limit values
ELVs
limits on exposure to electromagnetic fields which are based on biophysical and biological considerations, in
particular on the basis of scientifically well-established short-term and acute direct effects, i.e. thermal effects
and non-thermal effects such as electrical stimulation of tissues
Note 1 to entry: Compliance with these limits will ensure that workers exposed to electromagnetic fields are protected
against known adverse health effects (from Directive 2013/35/EU).
3.8.1
health effects ELVs
ELVs above which workers might be subject to adverse health effects, such as thermal heating or stimulation
of nerve and muscle tissue
[SOURCE: Directive 2013/35/EU]
3.8.2
sensory effects ELVs
ELVs above which workers might be subject to transient disturbed sensory perceptions and minor changes
in brain functions
[SOURCE: Directive 2013/35/EU]
3.9
risk assessment
process of determining compliance of a workplace environment with the limits set in the Directive 2013/35/EU
by performing the actions stated in Article 4 of the Directive 2013/35/EU
3.10
workplace
location where workers have access as part of their duties
3.11
worker
person employed by an employer, including trainees and apprentices but excluding domestic servants
[SOURCE: Directive 89/391/EEC]
4 General considerations on assessment
4.1 Introduction
This clause describes the general concept of an initial assessment of a workplace, how to compare
assessment results with the action levels and exposure limits, and further actions if needed.
The exposure to be assessed is at the workplace(s) where a worker is permitted or reasonably expected to
be present. Workplace exposure level is assessed at locations to which a worker would have access as part
of their duties, and its contributors are emissions from equipment affecting that location.
Other health and safety issues covered by the Directive, in particular workers with active implanted medical
devices (AIMDs), pregnant workers, and indirect effects shall be addressed as outlined in Annex A.
4.2 Overview of risk assessment procedure
The flowchart presented in Figure 1 shows graphically the assessment process. Prior to commencing the
assessment process, and in order to determine what level of workplace assessment, if any, is necessary the
workplace shall first be characterized. This requires the employer to establish what electromagnetic field-
emitting electrical equipment exists in the workplace.
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As a preliminary step, the employer shall assess if there are workers exposed to indirect effects or workers
at particular risks and address them as described in Annex A.
The first decision box of Figure 1 relates to compliant equipment. Most workplaces will contain only electrical
equipment which do not produce electromagnetic fields at levels above general public exposure limits. These
workplaces will require no further assessment. Clause 5 defines which electrical equipment can be excluded
from detailed exposure assessment. Table 1 defined in Clause 5 provides examples of such equipment. It
includes in particular any equipment which has been placed on the European market in compliance with the
relevant product performance Directives and tested against general public limits using an EMF harmonized
standard. Examples of EMF related harmonized standards are listed in Annex C.
When assessing the compliance of equipment, the zoning concepts presented in Annex E may be used.
Table 2 in Clause 6 gives a non-exhaustive list of equipment which is likely to require further assessment. In
preparation for this, the employer should identify the type of equipment in the workplace, characteristics (e.g.
frequency, emitted power, duty factor) and its conditions of use (e.g. normal position of operator, position of
other workers than the operator, time spent at normal position, operations or maintenance or repair at
distances from the emitting equipment closer than normal etc.). See Clause 6.
The term “normal” covers the intended use, the use as specified in the employer’s instructions to the workers,
the installation(s) used, the instructions from the employer on how maintenance and repair shall be
performed, situations of foreseeable incidents. Wilful behaviour of the worker against instructions of the
employer or safety instructions of device manufacturers is not required to be covered by the term „normal”.
Situations with simultaneous exposure to multiple sources and/or multiple frequencies shall be addressed
according to EN IEC 62311:—. The employer may optionally use alternative appropriate methods such as
those described in Annex D, which may include additional overestimation, but other scientifically proven and
validated exposure evaluation procedures can be applied, provided that they lead to approximately
equivalent and comparable results.
Optional measures to reduce exposure may be introduced at any point of the assessment in order to achieve
compliance.
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Figure 1 — Assessment process
If derogations under Article 10 of Directive 2013/35/EU (“Derogations”) are applicable, then the exposure
limit values may be exceeded provided that all the applicable conditions in Article 10 are met.
If a specific standard is applicable to the working environment or type of workplace, then this shall be used
for the assessment unless employer considers it unsuitable, in which case a justification for its unsuitability
shall be included in the assessment report (see Clause 7). If this specific workplace standard contains other
exposure limits than those stated in Directive 2013/35/EU then the exposure limits from Directive 2013/35/EU
shall be applied.
If no such standard exists or if the employer considers it unsuitable then a detailed exposure assessment
shall be performed using the process defined in Figure 2 for exposure to magnetic fields between 1 Hz and
10 MHz, Figure 3 for exposure to electric fields between 1 Hz and 10 MHz, Figure 4 for exposure to
electromagnetic fields between 100 kHz and 300 GHz and Figure 5 for exposure to magnetic field between
0 Hz and 1 Hz. In Figure 2 and Figure 3, sensory effects ELVs are relevant only between 1 Hz and 400 Hz.
The exposure assessment is then performed either against action levels (see Clause 8) or directly against
exposure limit values (see Clause 9) using procedures from other European basic, generic or product EMF
standards. There are only ELVs between 0 Hz and 1 Hz.
For some equipment considered in the assessment of the workplace, it may be appropriate to undertake an
assessment against the exposure limit values directly, and specific assessment standards for that equipment
will indicate how that should be done. Other equipment in the same workplace may be assessed by
comparison with the action levels.
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Figure 2 — Detailed assessment process for exposure to magnetic field between 1 Hz and 10 MHz
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Figure 3 — Detailed assessment process for exposure to electric field between 1 Hz and 10 MHz
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Figure 4 — Detailed assessment process for exposure to electromagnetic field between 100 kHz
and 300 GHz
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Figure 5 — Detailed assessment process for exposure to static magnetic flux density (B ) between
0
0 Hz and 1 Hz
In general time-averaging can be applied to assessments made against limits based on thermal effects
(
...