IEC TR 61547-1:2020

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

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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
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8.4.3 Option 2: measure values using a flickermeter . 25
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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
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A.4 Example of implementation in MATLAB . 37
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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
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C.1 Test without voltage fluctuations ( ) . 42
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C.2 Test with (intentional) voltage fluctuations (I) . 42
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C.3 Test under dimming conditions. 46
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Annex D (informative) Guidance for testing based on test type . 48
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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
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Figure 5 – Measuring P . 29
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Figure 6 – Measuring P (I) . 29
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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
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P I
( )
Figure C.1 – Graphical P results for three EUTs with rectangular modulation
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at five frequencies ( P = 1) . 43
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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
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– 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
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Figure C.6 – Graphical P (C) results for four EUTs under dimming conditions . 47
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Table 1 – Voltage fluctuations – Test specification of voltage fluctuations applied at
input AC power ports mains 120/230 V and 50/60 Hz . 18
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Table 2 – Guidance for P testing . 28
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Table A.1 – Test specification of illuminance fluctuations for lightmeter class
...