IEC TR 61000-1-1:2023

IEC TR 61000-1-1 ®
Edition 2.0 2023-02
TECHNICAL
REPORT
colour
inside
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 1-1: General – Application and interpretation of fundamental definitions and
terms
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IEC TR 61000-1-1 ®
Edition 2.0 2023-02
TECHNICAL
REPORT
colour
inside
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –

Part 1-1: General – Application and interpretation of fundamental definitions and

terms
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.01 ISBN 978-2-8322-6435-5

– 2 – IEC TR 61000-1-1:2023 © IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 10
4 The electromagnetic environment . 10
4.1 General . 10
4.2 Coupling between emitting and susceptible devices . 11
5 Application of EMC terms and definitions . 12
5.1 General . 12
5.2 Relation between various types of levels . 12
5.2.1 Emissions and immunity level (and limit). 12
5.2.2 Compatibility level . 13
5.2.3 Examples to illustrate the concepts of using levels and limits. 14
5.3 Probability aspects and margins . 16
5.3.1 Compatibility levels and uncertainties . 16
5.3.2 Standardized test. 17
5.3.3 In situ test – Superposition . 18
5.3.4 Lack of data . 20
6 Models and their limitations . 21
6.1 General . 21
6.2 Source models . 21
6.2.1 Conducted emissions . 21
6.2.2 Radiated emissions . 22
6.3 Coupling models . 23
6.3.1 General . 23
6.3.2 Common impedance coupling . 23
6.3.3 Coupling by induction . 24
6.3.4 Radiative coupling . 27
6.4 Susceptible device models . 27
Annex A (informative) Interpretation of EMC terms and definitions . 28
A.1 General . 28
A.2 Units and decibels . 28
A.3 Electromagnetic interference, compatibility and environment . 29
A.3.1 General . 29
A.3.2 Electromagnetic interference (EMI) . 29
A.3.3 Electromagnetic compatibility (EMC) . 30
A.3.4 The electromagnetic environment . 30
A.4 Susceptibility/immunity. 31
A.5 Level and limit . 31
A.6 Emission and immunity . 32
A.7 Compatibility level and margin . 34
Annex B (informative) Standardized and in situ tests . 37
Annex C (informative) Review of the historical assignment of radiated disturbance
degrees . 38

C.1 General . 38
C.2 Theoretical analysis of radiated disturbance degrees . 38
C.3 Detailed derivations . 40
C.3.1 Derivation of Formula (C.4). 40
C.3.2 Derivation of Formula (C.5). 41
Bibliography . 43

Figure 1 – Coupling paths between emitting and susceptible devices . 11
Figure 2 – Limits and levels for a single emitter and susceptible device as a function of
some independent variable (e.g., frequency) . 13
Figure 3 – Emission/immunity limits and compatibility levels, with an example of
emission/immunity levels for a single emitter and susceptible device as a function of
some independent variable (e.g., frequency) . 13
Figure 4 – Compatibility levels U for the odd harmonics in a public low-voltage
c
network and examples of associated emission and immunity limits . 15
Figure 5 – Limits, compatibility levels and margins, as a function of any independent
variable (e.g., frequency) . 17
Figure 6 – Example of the probability densities for an emission level and an immunity
level, at one single value of the independent variable . 18
Figure 7 – Example of superposition of disturbances . 20
Figure 8 – Example of probability densities for an ultimate disturbance level (the sum
of disturbance levels produced by various emitters) and the immunity levels of two
types of susceptible device . 20
Figure 9 – Source model for conducted emissions (source loaded by Z and Z ) . 22
L1 L2
Figure 10 – Electric and magnetic dipole elements . 23
Figure 11 – Capacitance per unit length as a function of conductor separation . 25
Figure 12 – Flux density from parallel conductors . 26
Figure A.1 – The basic form of an EMI problem . 29
Figure A.2 – Subdivision of EMC in its key aspects . 30
Figure A.3 – Overview of various EMC terms and measuring conditions . 34
Figure A.4 – Examples of probability densities p(D), p(I) and the resulting p(I – D) . 35
Figure C.1 – Problem geometry . 39

Table C.1 – Radiated disturbance degrees . 38

– 4 – IEC TR 61000-1-1:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMAGNETIC COMPATIBILITY (EMC) –

Part 1-1: General – Application and interpretation
of fundamental definitions and terms

FOREWORD
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