IEC 61000-6-4
Edition 3.0 2018-02
REDLINE VERSION
Electromagnetic compatibility (EMC) –
Part 6-4: Generic standards – Emission standard for industrial environments
IEC 61000-6-4:2018-02 RLV(en)
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IEC 61000-6-4
Edition 3.0 2018-02
REDLINE VERSION
Electromagnetic compatibility (EMC) –
Part 6-4: Generic standards – Emission standard for industrial environments
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.10
ISBN 978-2-8322-5388-5
BASIC EMC PUBLICATION
® Registered trademark of the International Electrotechnical Commission
®
Warning! Make sure that you obtained this publication from an authorized distributor.
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– 2 – IEC 61000-6-4:2018 RLV © IEC 2018
CONTENTS
FOREWORD ........................................................................................................................... 4
INTRODUCTION ..................................................................................................................... 2
1 Scope and object ............................................................................................................ 7
2 Normative references ...................................................................................................... 8
3 Terms, definitions and abbreviated terms ........................................................................ 9
3.1 Terms and definitions.............................................................................................. 9
3.2 Abbreviated terms ................................................................................................. 10
4 Conditions during testing ............................................................................................... 12
5 Product documentation .................................................................................................. 13
6 Applicability ................................................................................................................... 13
7 Measurement uncertainty .............................................................................................. 13
8 Compliance with this document ..................................................................................... 15
9 Emission requirements .................................................................................................. 15
Application of limits in tests for conformity of equipment in series production.....................
(informative) Testing of DC powered systems ........................................................ 20 Annex A
(informative) Further information on measurements using a FAR ........................... 22 Annex B
B.1 General ................................................................................................................. 22
B.2 Analysis ................................................................................................................ 22
B.2.1 Theoretical analysis of simple radiators ......................................................... 22
B.2.2 Limitations with the basic model .................................................................... 23
B.2.3 Measurements on an EUT ............................................................................. 26
B.2.4 Derivation of limits ......................................................................................... 27
B.3 Requirements ....................................................................................................... 28
Bibliography .......................................................................................................................... 29
Figure 1 – Examples of ports .................................................................................................. 9
Figure B.1 – Geometrical optics model for OATS measurements .......................................... 22
Figure B.2 – Field attenuation between two half-wave dipoles above ground plane with
fixed transmit antenna height and variable receive antenna height ....................................... 23
Figure B.3 – Equivalent circuit diagram of a typical EUT ....................................................... 24
Figure B.4 – 10 m distance, horizontal polarization, calculated differences for an
electrically short straight wire above the ground plane on an OATS compared with a
FAR (E
OATS
– E
FAR
) ........................................................................................................... 24
Figure B.5 – 10 m distance, vertical polarization, calculated differences for an
electrically short straight wire above the ground plane on an OATS compared with a
FAR (E
OATS
– E
FAR
) ........................................................................................................... 25
Figure B.6 – 3 m distance, horizontal polarization, calculated differences for an
electrically short straight wire above the ground plane on an OATS compared with a
FAR (E
OATS
– E
FAR
) ........................................................................................................... 25
Figure B.7 – 3 m distance, vertical polarization, calculated differences for an
electrically short straight wire above the ground plane on an OATS compared with a
FAR (E
OATS
– E
FAR
) ........................................................................................................... 26
Figure B.8 – Differences of the horizontal polarised emission of the small EUT with
mains lead in the 3 m FARs and on 10 m OATS .................................................................... 27
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IEC 61000-6-4:2018 RLV © IEC 2018 – 3 –
Table 1 − Emission ...................................................................................................................
Table 1 – Test arrangements of EUT .................................................................................... 12
Table 2 – Required highest frequency for radiated measurement .......................................... 16
Table 3 – Requirements for radiated emissions – enclosure port........................................... 17
Table 4 – Requirements for conducted emissions – low voltage AC mains port ..................... 18
Table 5 – Requirements for conducted emissions – wired network port ................................. 18
Table A.1 – Proposed requirements for conducted emissions – DC power port ..................... 20
Table A.2 – Conducted testing of DC powered equipment ..................................................... 21
Table B.1 – Proposed requirements for radiated emissions, FAR .......................................... 28
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