IEC 61000-2-10:2021

IEC 61000-2-10 ®
Edition 2.0 2021-11
INTERNATIONAL
STANDARD
colour
inside
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 2-10: Environment – Description of HEMP environment – Conducted
disturbance
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IEC 61000-2-10 ®
Edition 2.0 2021-11
INTERNATIONAL
STANDARD
colour
inside
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –

Part 2-10: Environment – Description of HEMP environment – Conducted

disturbance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.01 ISBN 978-2-8322-1050-6

– 2 – IEC 61000-2-10:2021 © IEC 2021
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 General . 12
5 Description of HEMP environment, conducted parameters . 13
5.1 Introductory remarks . 13
5.2 Early-time HEMP external conducted environment . 13
5.3 Intermediate-time HEMP external conducted environment. 15
5.4 Late-time HEMP external conducted environment . 15
5.5 Antenna currents . 17
5.6 HEMP internal conducted environments . 21
Annex A (informative) Discussion of early-time HEMP coupling for long lines . 23
A.1 Elevated line coupling . 23
A.2 Buried line coupling . 24
Annex B (informative) Discussion of intermediate-time HEMP coupling for long lines . 26
B.1 General . 26
B.2 Elevated line coupling . 26
B.3 Buried line coupling . 26
Annex C (informative) Responses of simple linear antennas to the IEC early-time
HEMP environment . 28
C.1 Overview. 28
C.2 IEC early-time HEMP environment . 28
C.3 Evaluation of the antenna responses . 31
C.3.1 General . 31
C.3.2 Monopole antenna . 31
C.3.3 Dipole antenna . 32
C.4 Calculated results . 33
C.5 Summary of results . 34
Annex D (informative) Measured cable currents inside telephone buildings . 43
Annex E (informative) Time waveform description for the responses of simple linear
antennas to the early-time HEMP environment . 44
E.1 General . 44
E.2 Description of the recommended waveform . 44
E.3 Procedure for determining the test waveform . 46
Bibliography . 47

Figure 1 – Geometry for the definition of polarization and of the angles of elevation ψ
and azimuth φ . 9
Figure 2 – Geometry for the definition of the plane wave . 10
Figure 3 – Geomagnetic dip angle . 11
Figure 4 – Three-phase line and equivalent circuit for computing late-time HEMP
conducted current . 16

Figure 5 – Centre-loaded dipole antenna of length l and radius a, excited by an
incident early-time HEMP field . 18
Figure A.1 – Variation of peak coupled cable current versus local geomagnetic dip
angle . 23
Figure C.1 – Illustration of the incident HEMP field . 29
Figure C.2 – HEMP tangent radius R defining the illuminated region, shown as a
t
function of burst height (HOB) . 29
Figure C.3 – Geometry of the monopole antenna . 32
Figure C.4 – Geometry of the dipole antenna . 33
Figure C.5 – Cumulative probability distributions for the peak responses for the 1 m
vertical monopole antenna load currents and voltages . 34
Figure C.6 – Cumulative probability distributions for the peak responses for the 3 m
vertical monopole antenna load currents and voltages . 35
Figure C.7 – Cumulative probability distributions for the peak responses for the 10 m
vertical monopole antenna load currents and voltages . 36
Figure C.8 – Cumulative probability distributions for the peak responses for the 100 m
vertical monopole antenna load currents and voltages . 37
Figure C.9 – Cumulative probability distributions for the peak responses for the 1 m
horizontal dipole antenna load currents and voltages . 38
Figure C.10 – Cumulative probability distributions for the peak responses for the 3 m
horizontal dipole antenna load currents and voltages . 39
Figure C.11 – Cumulative probability distributions for the peak responses for the 10 m
horizontal dipole antenna load currents and voltages . 40
Figure C.12 – Cumulative probability distributions for the peak responses for the 100 m
horizontal dipole antenna load current and voltages . 41
Figure C.13 – Plot of multiplicative correction factors for correcting the values of V ,
oc
I , I and V for antennas having other L/a ratios . 42
sc L L
Figure E.1 – Comparison of a computation and an analytic formula for a 1 m wire
illuminated by the E HEMP with the field parallel to the wire (and no ground present) [11] . 45
Figure E.2 – General waveform of the damped oscillatory waveform from
IEC 61000-4-18 [14]. 45

Table 1 – Early-time HEMP conducted common-mode short-circuit currents including
the time history and peak value I as a function of severity level, length L (in metres)
pk
and ground conductivity σ . 14
g
Table 2 – Intermediate-time HEMP conducted common-mode short-circuit currents
including the time history and peak value I as a function of length L (in metres) and
pk
ground conductivity σ . 15
g
Table 3 – Maximum peak electric dipole antenna load current versus frequency for
antenna principal frequencies . 19
Table 4 – HEMP response levels for V for the vertical monopole antenna . 19
oc
Table 5 – HEMP response levels for I for the vertical monopole antenna . 20
sc
a
Table 6 – HEMP response levels for I for the loaded vertical monopole antenna . 20
L
Table 7 – HEMP response levels for V for the horizontal dipole antenna . 20
oc
Table 8 – HEMP response levels for I for the horizontal dipole antenna . 21
sc
a
Table 9 – HEMP response levels for I for the loaded horizontal dipole antenna . 21
L
– 4 – IEC 61000-2-10:2021 © IEC 2021
Table A.1 – Rectified impulse (RI) and computed effective pulse widths for vertical
polarization of the early-time HEMP for an elevated conductor (h = 10 m) . 24
Table A.2 – Coupled early-time HEMP currents for a buried conductor (z = –1 m) . 25
Table A.3 – Waveform parameters for early-time HEMP buried conductor coupling
(z = −1 m) . 25
Table A.4 –Average waveform parameters for early-time HEMP buried conductor
currents . 25
Table B.1 – Coupled HEMP intermediate-time short-circuit currents for an elevated
conductor (h = 10 m) . 26
Table B.2 – Coupled HEMP intermediate-time short-circuit currents for a buried
conductor (h = –1 m) . 26
Table D.1 – Estimated internal peak-to-peak cable currents (I ) from direct HEMP
PP
illumination (from [8]) . 43
Table D.2 – Damped sinusoid waveform characteristics for internal cable currents
(measured) (from [8]) .
...