IEC 61000-4-18:2019

Electromagnetic compatibility (EMC) - Part 4-18: Testing and measurement techniques - Damped oscillatory wave immunity test

IEC 61000-4-18:2019

Name:IEC 61000-4-18:2019   Standard name:Electromagnetic compatibility (EMC) - Part 4-18: Testing and measurement techniques - Damped oscillatory wave immunity test
Standard number:IEC 61000-4-18:2019   language:English and French language
Release Date:15-May-2019   technical committee:SC 77B - High frequency phenomena
Drafting committee:MT 12 - TC 77/SC 77B/MT 12   ICS number:01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION

IEC 61000-4-18
Edition 2.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electromagnetic compatibility (EMC) –
Part 4-18: Testing and measurement techniques – Damped oscillatory wave
immunity test
Compatibilité électromagnétique (CEM) –
Partie 4-18: Techniques d'essai et de mesure – Essai d'immunité à l'onde
oscillatoire amortie




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IEC 61000-4-18
Edition 2.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electromagnetic compatibility (EMC) –

Part 4-18: Testing and measurement techniques – Damped oscillatory wave

immunity test
Compatibilité électromagnétique (CEM) –

Partie 4-18: Techniques d'essai et de mesure – Essai d'immunité à l'onde

oscillatoire amortie
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.20 ISBN 978-2-8322-6707-3

– 2 – IEC 61000-4-18:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 11
4 General . 12
4.1 Types of damped oscillatory waves . 12
4.2 Slow damped oscillatory wave phenomenon . 13
4.3 Fast damped oscillatory wave phenomenon . 14
4.3.1 General . 14
4.3.2 Disturbances produced by switchgear and controlgear . 14
4.3.3 Disturbances produced by high-altitude electromagnetic pulse (HEMP) . 15
5 Test levels . 15
6 Test instrumentation . 16
6.1 General . 16
6.2 Damped oscillatory wave generators . 17
6.2.1 Slow damped oscillatory wave generator . 17
6.2.2 Fast damped oscillatory wave generator . 19
6.3 Coupling/decoupling networks . 21
6.3.1 General . 21
6.3.2 Coupling/decoupling networks for slow damped oscillatory waves . 22
6.3.3 Coupling/decoupling networks for fast damped oscillatory waves . 28
6.4 Calibration of coupling/decoupling networks . 30
6.4.1 General . 30
6.4.2 Calibration of CDNs for slow damped oscillatory waves . 31
6.4.3 Calibration of CDNs for fast damped oscillatory waves . 32
6.5 Capacitive coupling clamp for fast damped oscillatory waves . 34
6.5.1 Characteristics of the capacitive coupling clamp . 34
6.5.2 Calibration of the capacitive coupling clamp . 35
7 Test setup . 36
7.1 Test equipment . 36
7.2 Verification of the test instrumentation . 36
7.3 Test setup . 37
7.3.1 General . 37
7.3.2 Particular requirements for tests on shielded lines for slow damped
oscillatory waves . 39
7.3.3 Particular requirements for the test setup for fast damped oscillatory
waves testing . 40
7.4 Equipment under test . 42
7.5 Coupling/decoupling networks . 42
8 Test procedure . 42
8.1 General . 42
8.2 Laboratory reference conditions . 42
8.2.1 Climatic conditions . 42

8.2.2 Electromagnetic conditions . 42
8.3 Execution of the test . 43
9 Evaluation of test results . 44
10 Test report . 44
Annex A (informative) Information on test levels for the damped oscillatory wave . 46
Annex B (informative) Measurement uncertainty (MU) considerations . 47
B.1 General . 47
B.2 Legend for damped oscillatory wave parameters . 47
B.3 Uncertainty contributors to the damped oscillatory wave MU . 48
B.4 Uncertainty of the output voltage and current measurement . 48
B.4.1 General . 48
B.4.2 Rise time of the 3 MHz damped oscillatory wave . 48
B.4.3 Peak of the 3 MHz damped oscillatory wave . 50
B.4.4 Further MU contributions to time measurements . 51
B.4.5 Rise time of the step response and bandwidth of the frequency
response of the measuring system . 51
B.4.6 Impulse peak and width distortion due to the limited bandwidth of the
measuring system . 52
B.5 Application of uncertainties in the damped oscillatory waveform compliance
criterion . 53
Annex C (informative) Issues relating to powering EUTs having DC/DC converters at
the input . 54
C.1 General . 54
C.2 Considerations for remediation . 55
Bibliography . 57

Figure 1 – Example of waveform of the damped oscillatory wave . 13
Figure 2 – Example of schematic circuit of the generator for the slow damped
oscillatory wave . 17
Figure 3 – Representation of a slow damped oscillatory wave . 18
Fi
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