IEC 63129:2020

IEC 63129 ®
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Determination of inrush current characteristics of lighting products

Détermination des caractéristiques du courant d'appel des produits d'éclairage

IEC 63129 :2020-04(en-fr)
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IEC 63129 ®
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Determination of inrush current characteristics of lighting products

Détermination des caractéristiques du courant d'appel des produits d'éclairage

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.01; 29.140.99 ISBN 978-2-8322-8205-2

– 2 – IEC 63129:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviated terms . 8
5 General notes on measurements . 8
6 Inrush current measurements . 8
7 DC method (default method) . 10
7.1 Measurement setup . 10
7.2 Determining the value of the adjustment resistance . 11
7.2.1 Determining the value of R . 11
adj,1
7.2.2 Determining the value of R . 12
adj,k
7.3 Measurement and calculation of the inrush current characteristics . 13
7.3.1 Inrush current characteristics for a single DUT (k = 1) . 13
7.3.2 Inrush current characteristics for multiple DUTs . 14
8 Alternative AC method . 14
8.1 General . 14
8.2 Determining the value of the adjustment resistance . 15
8.2.1 Determining the value of R . 15
adj,1
8.2.2 Determining the value of R . 16
adj,k
8.3 Measurement and calculation of the inrush current characteristics . 16
8.3.1 Measuring and calculating the inrush current for a single DUT . 16
8.3.2 Measuring and calculating the inrush current for multiple DUTs . 16
9 Additional alternative methods . 17
Annex A (informative) Application of inrush current characteristics . 18
A.1 General . 18
A.2 Matching of DUT inrush current characteristics with switch or MCB
specifications . 18
Bibliography . 19

Figure 1 – Determination of the inrush current pulse durations t and t . 9
H10 H50
Figure 2 – Measurement setup for the DC method (default method) . 10
Figure 3 – Switching unit. 11
Figure 4 – Typical current rise and voltage decrease as a function of time after loading
C (step c)) followed by turning on the switching unit (step e)) as described under
step f) . 12
Figure 5 – Determination of I (ignoring the current peaks for t < 100 µs) . 14
max
Figure 6 – Measurement setup for the AC method (alternative method) . 15
Figure 7 – Addition of m DUTs to the measurement circuit (both DC and AC methods) . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DETERMINATION OF INRUSH CURRENT CHARACTERISTICS
OF LIGHTING PRODUCTS
FOREWORD
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International Standard IEC 63129 has been prepared by IEC technical committee 34: Lamps
and related equipment.
The text of this International Standard is based on the following documents:
CDV Report on voting
34/636/CDV 34/679/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.

– 4 – IEC 63129:2020 © IEC 2020
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