EN 61000-2-10:1999

SLOVENSKI STANDARD
01-marec-2001
Electromagnetic compatibility (EMC) - Part 2-10: Environment - Description of
HEMP environment - Conducted disturbance
Electromagnetic compatibility (EMC) -- Part 2-10: Environment - Description of HEMP
environment - Conducted disturbance
Elektromagnetische Verträglichkeit (EMV) -- Teil 2-10: Umgebungsbedingungen -
Beschreibung der HEMP-Umgebung - Leitungsgeführte Störgrößen
Compatibilité électromagnétique (CEM) -- Partie 2-10: Environnement - Description de
l'environnement IEMN-HA - Perturbations conduites
Ta slovenski standard je istoveten z: EN 61000-2-10:1999
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
61000-2-10
INTERNATIONAL
Première édition
STANDARD
First edition
1998-11
Compatibilité électromagnétique (CEM) –
Partie 2-10:
Environnement – Description de l’environnement
IEMN-HA – Perturbations conduites
Electromagnetic compatibility (EMC) –
Part 2-10:
Environment – Description of
HEMP environment – Conducted disturbance
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61000-2-10 © IEC:1998 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION . 7
Clause
1 Scope. 9
2 Normative references . 9
3 General . 11
4 Definitions . 13
5 Description of HEMP environment, conducted parameters. 19
5.1 Introductory remarks. 19
5.2 Early-time HEMP external conducted environment. 21
5.3 Intermediate-time HEMP external conducted environment . 25
5.4 Late-time HEMP external conducted environment. 27
5.5 Antenna currents. 29
5.6 HEMP internal conducted environments . 39
Annex A (informative) Discussion of early-time HEMP coupling for long lines . 43
Annex B (informative) Discussion of intermediate-time HEMP coupling for long lines. 49
Annex C (informative) Responses of simple linear antennas to the IEC early-time
HEMP environment. 53
Annex D (informative) Measured cable currents inside telephone buildings. 85

61000-2-10 © IEC:1998 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_________
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 2-10: Environment – Description of HEMP environment –
Conducted disturbance
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61000-2-10 has been prepared by subcommittee 77C: Immunity to
high altitude nuclear electromagnetic pulse (HEMP), of IEC technical committee 77:
Electromagnetic compatibility.
The text of this standard is based on the following documents:
FDIS Report on voting
77C/61/FDIS 77C/65/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
Annexes A, B, C and D are for information only.

61000-2-10 © IEC:1998 – 7 –
INTRODUCTION
IEC 61000 is published in separate parts according to the following structure:
Part 1: General
General considerations (introduction, fundamental principles)
Definitions, terminology
Part 2: Environment
Description of the environment
Classification of the environment
Compatibility levels
Part 3: Limits
Emission limits
Immunity limits (insofar as these limits do not fall under the responsibilty of the
product committees)
Part 4: Testing and measurement techniques
Measurement techniques
Testing techniques
Part 5: Installation and mitigation guidelines
Installation guidelines
Mitigation methods and devices
Part 6: Generic standards
Part 9: Miscellaneous
Each part is further subdivided into several parts, published either as International Standards
or technical reports, some of which have already been published as sections. Others will be
published with the part number followed by a dash and a second number identifying the
subdivision.
61000-2-10 © IEC:1998 – 9 –
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 2-10: Environment – Description of HEMP environment –
Conducted disturbance
1 Scope
This International Standard defines the high-altitude electromagnetic pulse (HEMP) conducted
environment that is one of the consequences of a high-altitude nuclear explosion.
Those dealing with this subject consider two cases:
– high-altitude nuclear explosions;
– low-altitude nuclear explosions.
For civil systems the most important case is the high-altitude nuclear explosion. In this case,
the other effects of the nuclear explosion: blast, ground shock, thermal and nuclear ionizing
radiation are not present at the ground level.
However, the electromagnetic pulse associated with the explosion may cause disruption of, and
damage to, communication, electronic and electric power systems thereby upsetting the
stability of modern society.
The object of this standard is to establish a common reference for the conducted HEMP
environment in order to select realistic stresses to apply to victim equipment for evaluating
their performance.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61000. At the time of publication, the editions indicated
were valid. All standards are subject to revision, and parties to agreements based on this part
of IEC 61000 are encouraged to investigate the possibility of applying the most recent editions
of the normative documents indicated below. Members of IEC and ISO maintain registers of
currently valid International Standards.
IEC 60050(161):1990, International Electrotechnical Vocabulary (IEV) – Chapter 161:
Electromagnetic Compatibility
IEC 61000-2-9:1996, Electromagnetic compatibility (EMC) – Part 2: Environment – Section 1:
Description of HEMP environment – Radiated disturbance – Basic EMC publication
IEC 61000-4-24:1997, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 24: Test methods for protective devices for HEMP conducted disturbance –
Basic EMC publication
61000-2-10 © IEC:1998 – 11 –
3 General
A high-altitude (above 30 km) nuclear burst produces three types of electromagnetic pulses
which are observed on the earth's surface:
– early-time HEMP (fast);
– intermediate-time HEMP (medium);
– late-time HEMP (slow).
Historically most interest has been focused on the early-time HEMP which was previously
referred to as simply HEMP. Here we will use the term high-altitude EMP or HEMP to include
1)
all three types. The term NEMP covers many categories of nuclear EMPs including those
2) 3)
produced by surface bursts (SREMP) or created on space systems (SGEMP) .
Because the HEMP is produced by a high-altitude detonation, we do not observe other nuclear
weapon environments such as gamma rays, heat and shock waves at the earth's surface.
HEMP was reported from high-altitude nuclear tests in the South Pacific by the US and over
the USSR during the early 1960s, producing effects on electronic equipment far from the burst
location.
This standard presents the conducted HEMP environment induced on metallic lines, such as
cables or power lines, external and internal to installations, and external antennas.
________
1)
NEMP: Nuclear electromagnetic pulse.
2)
SREMP: Source region EMP.
3)
SGEMP: System generated EMP.
61000-2-10 © IEC:1998 – 13 –
4 Definitions
For the purpose of this International Standard, the definitions given in IEC 60050(161) apply,
as well as the following definitions:
Horizontal
polarisation
inc
Vertical
E
x
k
polarisation
inc
inc
H k
E
z
inc
H
y
ψ
φ
Ground plane
IEC  1 528/98
Figure 1 – Geometry for the definition of polarization and
of the angles of elevation and azimuth
ψψ φφ
4.1
angle of elevation in the vertical plane, ψψ
angle ψ measured in the vertical plane between a flat horizontal surface such as the ground
and the propagation vector (see figure 1)
4.2
azimuth angle, φφ
angle between the projection of the propagation vector on the ground plane and the principal
axis of the victim object (z axis for the transmission line of figure 1)
4.3
composite waveform
waveform which maximizes the important features of a waveform
4.4
coupling
interaction of the HEMP field with a system to produce currents and voltages on system
surfaces and cables. Voltages result from the induced charges and are only defined at low
frequencies with wavelengths larger than the surface or gap dimensions

61000-2-10 © IEC:1998 – 15 –
4.5
direction of propagation of the electromagnetic wave
→
direction of the propagation vector k , perpendicular to the plane containing the vectors of the
electric and the magnetic fields (see figure 2)
E
k
H
IEC  1 529/98
Figure 2 – Geometry for the definition of the plane wave
4.6
E1, E2, E3
terminology for the early, intermediate and late-time HEMP electric fields
4.7
EMP
any electromagnetic pulse, general description
4.8
geomagnetic dip angle, θθ
dip
→
dip angle of the geomagnetic flux density vector B , measured from the local horizontal in the
e
magnetic north-south plane. θ = 90° at the magnetic north pole, –90° at the magnetic south
dip
pole, (see figure 3)
61000-2-10 © IEC:1998 – 17 –
Magnetic north/south plane
B
e
θ
dip
Earth
North
South
IEC  1 530/98
Figure 3 – Geomagnetic dip angle
4.9
HEMP
high-altitude nuclear EMP
4.10
high-altitude (nuclear explosion)
height of burst above 30 km altitude
4.11
horizontal polarization
an electromagnetic wave is horizontally polarized if the magnetic field vector is in the incidence
plane and the electric field vector is perpendicular to the incidence plane and thus parallel to
the ground plane (see figure 1). (This type of polarization is also called perpendicular or
transverse electric (TE).)
4.12
incidence plane
plane formed by the propagation vector and the normal to the ground plane
4.13
low-altitude (nuclear explosion)
height of burst below 1 km altitude
4.14
NEMP
nuclear EMP; all types of EMP produced by a nuclear explosion
4.15
point-of-entry (PoE)
the physical location (point) on an electromagnetic barrier, where EM energy may enter or exit
a topological volume, unless an adequate PoE protective device is provided. A PoE is not
limited to a geometrical point. PoEs are classified as aperture PoEs or conductive PoEs
according to the type of penetration. They are also classified as architectural, mechanical,
structural or electrical PoEs, according to the functions they serve

61000-2-10 ©
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