IEC TR 61547-1:2020

Equipment for general lighting purposes - EMC immunity requirements - Part 1: Objective light flickermeter and voltage fluctuation immunity test method

IEC TR 61547-1:2020 describes an objective light flickermeter, which can be applied for the following purposes:
- measuring the intrinsic performance of all lighting equipment without the application of voltage fluctuations in terms of illuminance flicker; during this measurement, the lighting equipment is supplied with a stable mains;
- testing the immunity performance of lighting equipment against (unintentional) voltage fluctuation disturbance on the AC mains in terms of illuminance flicker; during this test a set of defined voltage fluctuations are applied to the AC mains and the immunity of the lighting equipment to the disturbance is determined.
Apart from the above two purposes, the immunity performance of lighting equipment can also be tested against intentional voltage fluctuation on the AC mains arising for example from mains signalling. This is however not described in further detail in this document. This third edition cancels and replaces the second edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the scope of this document has been clarified to make a distinction between flicker testing without voltage fluctuations to measure the intrinsic performance of lighting equipment and flicker testing in which a specific set of voltage fluctuations are applied in order to measure the immunity of the lighting equipment to voltage fluctuations present on the mains;
- the test procedure for flicker testing has been clarified.

General Information

• Status: Published
• Publication Date: 30-Jun-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.140.20 - Incandescent lamps
• Technical Committee: TC 34 - Lighting
• Drafting Committee: WG 5 - TC 34/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 23-Jul-2020
• Completion Date: 01-Jul-2020

Relations

• Revises: IEC TR 61547-1:2017 - Equipment for general lighting purposes - EMC immunity requirements - Part 1: An objective light flickermeter and voltage fluctuation immunity test method
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TR 61547-1 ®
Edition 3.0 2020-07
TECHNICAL
REPORT
colour
inside
Equipment for general lighting purposes – EMC immunity requirements –
Part 1: Objective light flickermeter and voltage fluctuation immunity test method
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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and withdrawn publications. Also known as the International Electrotechnical Vocabulary

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If you wish to give us your feedback on this publication or CISPR.

need further assistance, please contact the Customer Service

Centre: [e-mail].
IEC TR 61547-1 ®
Edition 3.0 2020-07
TECHNICAL
REPORT
colour
inside
Equipment for general lighting purposes – EMC immunity requirements –

Part 1: Objective light flickermeter and voltage fluctuation immunity test method

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.140.20 ISBN 978-2-8322-8532-9

– 2 – IEC TR 61547-1:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, abbreviated terms and symbols . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 10
3.3 Symbols . 11
4 General . 11
5 Light flickermeter . 13
6 Voltage fluctuation disturbance signal . 13
6.1 General . 13
6.2 Mains signal parameters . 14
6.3 Disturbance signal parameters and test levels . 15
7 Test setup and equipment . 16
7.1 General . 16
7.2 Test voltage . 17
7.3 Optical test environment . 17
7.4 Light sensor and amplifier . 18
7.5 Signals to be measured . 18
7.6 Signal processing . 18
7.6.1 Anti-aliasing filter . 18
7.6.2 Sampling frequency . 19
7.6.3 Signal resolution . 19
8 Verification procedure . 21
8.1 General . 21
8.2 Light flickermeter . 21
8.3 Mains voltage parameters without modulation . 22
8.3.1 Nominal voltage level . 22
8.3.2 Mains frequency . 22
8.4 Voltage fluctuation level . 22
8.4.1 General . 22
8.4.2 Option 1: measure the actual modulation frequencies and voltage levels . 22
V
8.4.3 Option 2: measure values using a flickermeter . 22
P
st
8.5 Light sensor and amplifier . 23
8.6 Test environment . 23
8.7 Light flicker noise . 23
9 Test procedure . 24
9.1 General . 24
9.2 Measuring the intrinsic flicker performance . 25
9.3 Testing the flicker immunity against voltage fluctuations . 26
9.4 Dimmer compatibility testing . 26
9.5 Controlgear testing . 27
10 Conditions during testing . 27
11 Evaluation of the test result . 28

12 Test report . 28
Annex A (informative) Specification of the light flickermeter . 29
A.1 Voltage flickermeter modifications . 29
A.2 Specification of the light flickermeter . 30
A.2.1 General . 30
A.2.2 Block a: illuminance adapter . 30
A.2.3 Block b: weighting filters . 30
A.2.4 Block c: squaring multiplier, sliding mean filter and scaling . 31
A.2.5 Block d: statistical analysis . 31
A.3 Verification of the light flickermeter . 32
LM ®
A.4 Example of implementation in MATLAB . 33
P
st
Annex B (informative) Uncertainty considerations . 34
B.1 General . 34
B.2 General symbols . 34
B.3 Measurand . 34
B.4 Influence quantities . 34
B.5 Uncertainty budget . 36
Annex C (informative) Examples of test results of lighting equipment . 38
LM
C.1 Test without voltage fluctuations ( ) . 38
P
st
LM
C.2 Test with (intentional) voltage fluctuations (I) . 38
P
st
C.3 Test under dimming conditions. 42
LM
Annex D (informative) Guidance for testing based on test type . 44
P
st
Bibliography . 45

Figure 1 – Full EMC approach for mains voltage fluctuations . 12
Figure 2 – Illustration of the mains test signal including a rectangular modulated
voltage fluctuation (see Equation (1)) . 14
Figure 3 – Block diagram voltage-fluctuation immunity test . 17
Figure 4 – Example of a recorded mains voltage fluctuation and illuminance signal of a

60 W incandescent lamp . 21
LM
P
Figure 5 – Measuring . 26
st
LM
P
Figure 6 – Measuring (I) . 26
st
Figure 7 – Dimmer compatibility testing . 26
Figure 8 – Controlgear testing . 27
Figure A.1 –Structure of the IEC 61000-4-15 flickermeter that uses voltage as input . 29
Figure A.2 – Structure of the light flickermeter based on a modified voltage flickermeter . 29
Figure A.3 – Flickermeter response to different waveshapes . 33
LM
Figure C.1 – Graphical P I results for three EUTs with rectangular modulation at
( )
st
V
five frequencies ( P = 1) . 39
st
Figure C.2 – EUT1: recorded signals (no mains voltage modulation) . 40
Figure C.3 – EUT1: recorded signals (with modulation) . 41

– 4 – IEC TR 61547-1:2020 © IEC 2020
Figure C.4 – EUT2: relative illuminance – Mains voltage modulation d = 0,407 % at
V
13,5 Hz ( P = 1) . 42
st
Figure C.5 – EUT3: relative illuminance – Mains voltage modulation d = 0,407 % at
V
13,5 Hz ( P = 1) . 42
st
LM
Figure C.6 – Graphical (C) results for four EUTs under dimming conditions . 43
P
st
Table 1 – Voltage fluctuations – Test specification of voltage fluctuations applied at
input AC mains 120/230 V and 50/60 Hz . 16
LM
Table 2 – Guidance for P testing . 25
st
Table A.1 – Test specification of illuminance fluctuations for lightmeter classifier . 32
Table B.1 – In
...

IEC TR 61547-1 ®
Edition 3.0 2020-07
REDLINE VERSION
TECHNICAL
REPORT
colour
inside
Equipment for general lighting purposes – EMC immunity requirements –
Part 1: Objective light flickermeter and voltage fluctuation immunity test method

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.

need further assistance, please contact the Customer Service

Centre: [e-mail].
IEC TR 61547-1 ®
Edition 3.0 2020-07
REDLINE VERSION
TECHNICAL
REPORT
colour
inside
Equipment for general lighting purposes – EMC immunity requirements –

Part 1: Objective light flickermeter and voltage fluctuation immunity test method

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.140.20 ISBN 978-2-8322-8605-0

– 2 – IEC TR 61547-1:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 2
1 Scope . 9
2 Normative references . 10
3 Terms, definitions, abbreviated terms and symbols . 10
3.1 Terms and definitions . 10
3.2 Abbreviated terms . 11
3.3 Symbols . 12
4 General . 13
5 Light flickermeter . 15
6 Voltage fluctuation disturbance signal . 15
6.1 General . 15
6.2 Mains signal parameters . 16
6.3 Disturbance signal parameters and test levels . 17
7 Test setup and equipment . 18
7.1 General . 18
7.2 Test voltage . 20
7.3 Optical test environment . 20
7.4 Light sensor and amplifier . 20
7.5 Signals to be measured . 21
7.6 Signal processing . 21
7.6.1 Anti-aliasing filter . 21
7.6.2 Sampling frequency . 21
7.6.3 Signal resolution . 22
8 Verification procedure . 24
8.1 General . 24
8.2 Light flickermeter . 24
8.3 Mains voltage parameters without modulation . 25
8.3.1 Nominal voltage level . 25
8.3.2 Mains frequency . 25
8.4 Voltage fluctuation level . 25
8.4.1 General . 25
8.4.2 Option 1: measure the actual modulation frequencies and voltage levels . 25
V
8.4.3 Option 2: measure values using a flickermeter . 25
P
st
8.5 Light sensor and amplifier . 26
8.6 Test environment . 26
8.7 Light flicker noise . 26
9 Test procedure . 27
9.1 General . 27
9.2 Measuring the intrinsic flicker performance . 28
9.3 Testing the flicker immunity against voltage fluctuations . 29
9.4 Dimmer compatibility testing . 29
9.5 Controlgear testing . 30
10 Conditions during testing . 30
11 Evaluation of the test result . 31

12 Test report . 31
Annex A (informative) Specification of the light flickermeter . 33
A.1 Voltage flickermeter modifications . 33
A.2 Specification of the light flickermeter . 34
A.2.1 General . 34
A.2.2 Block a: illuminance adapter . 34
A.2.3 Block b: weighting filters . 34
A.2.4 Block c: squaring multiplier, sliding mean filter and scaling . 35
A.2.5 Block d: statistical analysis . 35
A.3 Verification of the light flickermeter . 36
LM ®
A.4 Example of implementation in MATLAB . 37
P
st
Annex B (informative) Uncertainty considerations . 38
B.1 General . 38
B.2 General symbols . 38
B.3 Measurand . 38
B.4 Influence quantities . 38
B.5 Uncertainty budget . 40
Annex C (informative) Examples of test results of lighting equipment . 42
LM
C.1 Test without voltage fluctuations ( ) . 42
P
st
LM
C.2 Test with (intentional) voltage fluctuations (I) . 42
P
st
C.3 Test under dimming conditions. 46
LM
Annex D (informative) Guidance for testing based on test type . 48
P
st
Bibliography . 49

Figure 1 – Full EMC approach for mains voltage fluctuations . 14
Figure 2 – Definition Illustration of the mains test signal including a rectangular
modulated voltage fluctuation (see Equation (1)) . 16
Figure 3 – Block diagram voltage-fluctuation immunity test . 19
Figure 4 – Example of a recorded mains voltage fluctuation and illuminance signal of a
60 W incandescent lamp . 24
LM
Figure 5 – Measuring P . 29
st
LM
Figure 6 – Measuring P (I) . 29
st
Figure 7 – Dimmer compatibility testing . 29
Figure 8 – Controlgear testing . 30
Figure A.1 –Structure of the IEC 61000-4-15 flickermeter that uses voltage as input . 33
Figure A.2 – Structure of the light flickermeter based on a modified voltage flickermeter . 33
Figure A.3 – Flickermeter response to different waveshapes . 37
LM
LM
P I
( )
Figure C.1 – Graphical P results for three EUTs with rectangular modulation
st
st
V
at five frequencies ( P = 1) . 43
st
Figure C.2 – EUT1: recorded signals (no mains voltage modulation) . 44
Figure C.3 – EUT1: recorded signals (with modulation) . 45
Figure C.4 – EUT2: relative illuminance – Mains voltage modulation d = 0,407 % at
V
13,5 Hz ( P = 1) . 46
st
– 4 – IEC TR 61547-1:2020 RLV © IEC 2020
Figure C.5 – EUT3: relative illuminance – Mains voltage modulation d = 0,407 % at
V
13,5 Hz ( P = 1) . 46
st
LM
Figure C.6 – Graphical P (C) results for four EUTs under dimming conditions . 47
st
Table 1 – Voltage fluctuations – Test specification of voltage fluctuations applied at
input AC power ports mains 120/230 V and 50/60 Hz . 18
LM
Table 2 – Guidance for P testing . 28
st
Table A.1 – Test specification of illuminance fluctuations for lightmeter class
...