IEC TR 62493-1:2013

Assessment of lighting equipment related to human exposure to electromagnetic fields - Part 1: Results of the EMF measurement campaign from the VDE Test and Certification Institute and ZVEI, the German Electrical and Electronic Manufacturers' Association

IEC/TR 62493-1:2013(E) presents an overview on EMF measurement results dependent on different lamp technologies used in current luminaires. For the measurement only the test procedure with the so called Van der Hoofden head in the frequency range from 20 kHz to 10 MHz was used.

General Information

• Status: Published
• Publication Date: 08-Jul-2013
• ICS: 29.020 - Electrical engineering in general
• ICS: 29.140.01 - Lamps in general
• Technical Committee: TC 34 - Lighting
• Current Stage: PPUB - Publication issued
• Start Date: 09-Jul-2013
• Completion Date: 15-Oct-2013

Overview

IEC TR 62493-1:2013 is a Technical Report from the IEC that presents results from an EMF measurement campaign on lighting equipment carried out by the VDE Test and Certification Institute and ZVEI. It gives an empirical overview of electromagnetic field (EMF) emissions from a broad range of luminaires and lamp technologies using the Van der Hoofden head probe over the frequency range 20 kHz to 10 MHz. The report supports the application of IEC 62493:2009 by identifying construction features that affect EMF emissions and by summarizing measured factor values (F) vs. the compliance limit.

Key topics and technical requirements

• Measurement method: Tests follow IEC 62493:2009 procedures using the Van der Hoofden head; luminaires are placed at the standard distance (d) from the probe and measured across 20 kHz–10 MHz.
• Single-value metric (F): A single factor F is calculated by summing measured voltages weighted against frequency-specific limits across the whole band. The compliance limit is F = 0.85.
• Noise floor: Receiver thermal noise produces a baseline F ≈ 0.03; receiver attenuation settings affect this noise result.
• Results distribution: In the campaign, the majority of luminaires produced very low values (81% produced F ≤ 0.1; 99% were below half the limit), indicating low EMF levels for most current products.
• Influencing factors analyzed: lamp technology, lamp cover, luminaire type and shape, protection class, total lamp power, and housing material.
• Notable finding: One 58 W T8 luminaire with a thin transparent cover measured F = 0.84 on AC mains but fell to F = 0.13 on DC supply. The high AC result was attributed to frequency modulation of the electronic control gear by the 50 Hz mains (spectrum “smearing”).

Practical applications and users

• Manufacturers and product designers: identify enclosure, control-gear and shielding choices that reduce EMF emissions.
• Test laboratories and certification bodies: apply the Van der Hoofden-head procedure and interpret F results against the IEC 62493 limit.
• EMC/EMF engineers and compliance teams: use the campaign data to benchmark product families and prioritize design changes.
• Regulators, procurement and health & safety officers: assess risk and conformity of lighting equipment related to human exposure to electromagnetic fields.

Related standards

• IEC 62493:2009 - Assessment of lighting equipment related to human exposure to electromagnetic fields (normative reference used for test procedure).
• EN 62493 (equivalent regional text) and other parts of the IEC 62493 series (for broader guidance and additional test methods).

Keywords: IEC TR 62493-1, EMF measurement, lighting equipment, Van der Hoofden head, luminaires, electromagnetic fields, IEC 62493, VDE, ZVEI, EMF compliance.

Standards Content (Sample)

IEC/TR 62493-1 ®
Edition 1.0 2013-07
TECHNICAL
REPORT
colourcolour
insinsiidede
Assessment of lighting equipment related to human exposure to
electromagnetic fields –
Part 1: Results of the EMF measurement campaign from the VDE Test and
Certification Institute and ZVEI, the German Electrical and Electronic
Manufacturers' Association
IEC/TR 62493-1:2013(E)
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IEC/TR 62493-1 ®
Edition 1.0 2013-07
TECHNICAL
REPORT
colour
inside
Assessment of lighting equipment related to human exposure to

electromagnetic fields –
Part 1: Results of the EMF measurement campaign from the VDE Test and

Certification Institute and ZVEI, the German Electrical and Electronic

Manufacturers' Association
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
P
ICS 29.020; 29.140 ISBN 978-2-8322-0922-6

– 2 – TR 62493-1  IEC:2013(E)
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Test procedure . 6
4 Presentation of results . 7
4.1 General . 7
4.2 Frequency distribution of the measured values . 7
4.3 Explanation for the high measurement results of one single luminaire . 9
4.4 Evaluation of the influence of certain characteristics of the luminaires . 11
4.5 Type of luminaires according Table A.1 of IEC 62493:2009 . 11
4.6 Lamp cover . 12
4.7 Type of lamp . 13
4.8 Protection class . 13
4.9 Outer shape of the luminaire . 14
4.10 Total rated power of all lamps in a luminaire . 14
4.11 Material of the enclosure . 15
5 Conclusion . 15

Figure 1 – Measurement set-up according IEC 62493 . 7
Figure 2 – Frequency distribution of the measured values of the luminaires (absolute
number of luminaires) . 8
Figure 3 – Frequency distribution of the measured values F in the interval from 0 to
0,85 expressed as percentage values. . 8
Figure 4 – Frequency distribution of the measured values F in the interval from 0 to
0,1. . 9
Figure 5 – Luminaire supplied with AC mains power 230 V / 50 Hz. . 10
Figure 6 – Same luminaire as presented in Figure 5 supplied with DC mains power
230 V / 0 Hz. . 10

Table 1 – Structure of tables . 11
Table 2 – Measurement results of luminaire types in accordance with Table A.1 of
IEC 62493:2009 . 12
Table 3 – Measurement results dependent on the lamp cover . 12
Table 4 – Measurement dependent on the lamp technology used . 13
Table 5 – Measurement results dependent on the luminaire protection classes . 13
Table 6 – Measurement results dependent on the outer luminaire shape . 14
Table 7 – Measurement results dependent on the total lamp power in a luminiare . 14
Table 8 – Measurement results dependent on the material of the luminaire housing . 15

TR 62493-1  IEC:2013(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ASSESSMENT OF LIGHTING EQUIPMENT RELATED
TO HUMAN EXPOSURE TO ELECTROMAGNETIC FIELDS –

Part 1: Results of the EMF measurement campaign from the VDE Test and
Certification Institute and ZVEI, the German Electrical and Electronic
Manufacturers' Association
FOREWORD
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example "state of the art".
IEC/TR 62493-1, which is a technical report, has been prepared by IEC technical committee
34: Lamps and related equipment.

– 4 – TR 62493-1  IEC:2013(E)
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
34/178/DTR 34/183/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 62493 series, published under the general title Assessment of
lighting equipment related to human exposure to electromagnetic fields can be found on the
IEC website.
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
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• withdrawn,
• replaced by a revised edition, or
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TR 62493-1  IEC:2013(E) – 5 –
INTRODUCTION
In 2011 it was decided by VDE and ZVEI to start a measurement campaign for testing a broad
range of different types of luminaires with different lamp technologies against the new EMF
(Electromagnetic Fields) standard IEC 62493:2009 (identical to EN 62493:2010-02). The goal
was to get an overview on the EMF measurement results dependent on different lamp
technologies used in current luminaires on the market. For this measurement campaign only
the test procedure with the so called Van der Hoofden head in the frequency range from
20 kHz to 10 MHz was used.
The goal of this campaign is to identify construction details of lighting equipment which are
critical for the EMF measurements.
NOTE The VDE Testing and Certification Institute is a part of the VDE Association for Electrical, Electronic &
Information Technologies. The VDE Testing and Certification Institute is accredited on a national and international
level for the area of testing and certification of electrotechnical equipment, components and systems. ZVEI is the
German Industry Association for the Electrical Industry.

– 6 – TR 62493-1  IEC:2013(E)
ASSESSMENT OF LIGHTING EQUIPMENT RELATED
TO HUMAN EXPOSURE TO ELECTROMAGNETIC FIELDS –

Part 1: Results of the EMF measurement campaign from the VDE Test and
Certification Institute and ZVEI, the German Electrical and Electronic
Manufacturers' Association
1 Scope
This part of the IEC 62493 series presents an overview on EMF measurement results
dependent on different lamp technologies used in current luminaires. For the measurement
only the test procedure with the so called Van der Hoofden head in the frequency range from
20 kHz to 10 MHz was used.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 62493:2009, Assessment of lighting equipment related to human exposure to
electromagnetic fields
3 Test procedure
The testing of luminaires has been performed according to the requirements of
IEC 62493:2009. The luminaires have been placed over the test head at the distance d as
required by the standard. Figure 1 shows the set-up in principal.

TR 62493-1  IEC:2013(E) – 7 –

Luminaire
Distance d
ʺVan der Hoofdenʺ probe
Measurement/safety network
C
R
R
Receiver
C
20 kHz to MHz
Earth IEC  1680/13
Example
C = 470 pF
C = 10 nF
R = 470 Ω
R = 150 Ω
Figure 1 – Measurement set-up
...