EN 61000-4-9:1993

SLOVENSKI STANDARD
01-marec-1997
Elektromagnetna združljivost (EMC) - 4-9. del: Preskusne in merilne tehnike -
Preskus odpornosti proti impulznemu magnetnemu polju (IEC 61000-4-9:1993)
Electromagnetic compatibility (EMC) -- Part 4-9: Testing and measurement techniques -
Pulse magnetic field immunity test
Elektromagnetische Verträglichkeit (EMV) -- Teil 4-9: Prüf- und Meßverfahren - Prüfung
der Störfestigkeit gegen impulsförmige Magnetfelder
Compatibilité Electromagnétique (CEM) -- Partie 4-9: Techniques d'essai et de mesure -
Essai d'immunité au champ magnétique impulsionnel
Ta slovenski standard je istoveten z: EN 61000-4-9:1993
ICS:
33.100.20 Imunost Immunity
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE IEC
1000-4-9
INTERNATIONAL
Première édition
STANDARD
First edition
1993-06
Compatibilité électromagnétique -
Partie 4:
Techniques d'essai et de mesure -
Section 9: Essai d'immunité au
champ magnétique impulsionnel
Publication fondamentale en CEM
Electromagnetic compatibility (EMC) -
Part 4:
Testing and measurement techniques -
Section 9: Pulse magnetic field immunity test
Basic EMC Publication
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1000-4-9 © I EC :1993
CONTENTS
Page
FOREWORD 7
INTRODUCTION 9
Clause
1 Scope
2 Normative references
3 General
4 Definitions
4.1 EUT
4.2 Induction coil
4.3 Induction coil factor
4.4 Immersion method
4.5 Proximity method
15 4.6 Ground (reference) plane
4.7 Decoupling network, back filter
4.8 Transient
5 Test levels
6 Test equipment
6.1 Test generator 17
6.2 Induction coil 19
6.3 Test and auxiliary instrumentation
7 Test set-up
7.1 Ground (reference) plane
7.2 Equipment under test
7.3 Test generator 27
7.4 Induction coil
8 Test procedure 27
8.1 Laboratory reference conditions
8.2 Carrying out the test 29
9 Test results and test report
Annexes
A Induction coil calibration method
41 8 - Characteristics of the induction coils
C - Selection of the test levels
D - Information on magnetic field strength

1000-4-9 ©IEC:1993 5
Page
Figures
1 Example of application of the test field by the immersion method
2 Current waveform of the test generator for pulse magnetic field (6,4/16 µs)
3 Schematic circuit of the test generator for pulse magnetic field (6,4/16 µs) 33
4 Example of test set-up for table-top equipment 35
5 Example of test set-up for floor-standing equipment 35
6 Example of investigation of susceptibility to magnetic field
by the proximity method 37
7 Illustration of Helmholtz coils
B.1 - Characteristics of the field generated by a square induction coil (1 m side)
in its plane 45
B.2 - 3 dB area of the field generated by a square induction coil (1 m side) in its plane 45
B.3 - 3 dB area of the field generated by a square induction coil
(1 m side) in the mean orthogonal plane
(component orthogonal to the plane of the coil)
B.4 - 3 dB area of the field generated by two square induction
coils (1 m side) 0,6 m spaced, in the mean orthogonal
plane (component orthogonal to the plane of the coils)
B.5 - 3 dB area of the field generated by two square induction
coils (1 m side) 0,8 m spaced, in the mean orthogonal
plane (component orthogonal to the plane of the coils)
B.6 - 3 dB area of the field generated by a rectangular induction
coil (1 m x 2,6 m) in its plane
B.7 - 3 dB area of the field generated by a rectangular induction
coil (1 m x 2,6 m) in its plane (ground plane as a side of the induction coil) 51
B.8 - 3 dB area of the field generated by a rectangular induction
coil (1 m x 2,6 m) with ground plane, in the mean
orthogonal plane (component o rthogonal to the plane of the coil) 51

1000-4-9 © I EC :1993 - 7 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ELECTROMAGNETIC COMPATIBILITY (EMC) —
Part 4: Testing and measurement techniques—
Section 9 : Pulse magnetic field immunity test
Basic EMC Publication
FOREWORD
1)
The IEC (International Electrotechnical Commission) is a world-wide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote interna-
tional cooperation 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 (ISO) in accord-
ance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters, prepared by technical committees on which all
National Committees having a special interest therein are represented, express, as nearly as possible, an
intern
ational consensus of opinion on the subjects dealt with.
3)
They have the form of recommendations for international use published in the for of standards, technical repo
rts
or guides and they are accepted by the National Committeés in that sense.
4)
In order to promote international unification, the IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national or regional standards. Any divergence
between the IEC Standards and the corresponding national or regional standards shall be clearly indicated in the
latter.
International Standard IEC 1000-4-9 has been prepared by sub-committee 77B: High
frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility.
It forms section 9 of part
4 of IEC 1000. It has the status of a basic EMC publication in
accordance with IEC guide 107.
The text of this standard is based on the following documents:
DIS
Report on Voting
77B(CO)8
77B(CO)14
Full information on the voting for the approval of this standard can be found in the Voting Repo rt
indicated in the above table.
Annexes A and B form an integral pa rt of this standard.
Annexes C and D are for information only.

1000-4-9 © IEC:1993 - 9 -
INTRODUCTION
This standard is part of the IEC 1000 series, according to the following structure:
1: General
Part
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 (in so far they do not fall under the responsibility of the product commit-
tees)
Part 4: Testing and measurement techniques
Measurement techniques
Testing techniques
Part 5: Installation and mitigation guidelines
Installation guidelines
Mitigation methods and devices
Part 9: Miscellaneous
is further subdivided into sections which are to be published either as international
Each part
s.
standards or as technical repo rt
These standards and reports will be published in chronological order and numbered accord-
ingly.
rt is an international standard which gives immunity requirements and test procedures
This pa
related to "pulse magnetic field".

1000-4-9 ©IEC:1993 - 11 -
ELECTROMAGNETIC COMPATIBILITY (EMC)
Part 4: Testing and measurement
techniques —
Section 9 : Pulse magnetic field immunity test
Basic EMC Publication
1 Scope
This international standard relates to the immunity requirements of equipment, only under
operational conditions, to pulse magnetic disturbances mainly related to:
- industrial installations and power plants;
- medium voltage and high voltage sub-stations.
The applicability of this standard to equipment installed in different locations is determined by
the presence of the phenomenon, as specified in clause 3.
This standard does not consider disturbances due to capacitive or inductive coupling in cables
or other parts of the field installation.
Other IEC standards dealing with conducted disturbances cover these aspects.
The object of this standard is to establish a common and reproducible basis for evaluating the
performance of electrical and electronic equipment for household, commercial and industrial
applications when subjected to pulse magnetic fields.
The standard defines:
- recommended test levels;
- test equipment;
- test set-up;
- test procedure.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this section of IEC 1000-4. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to agree-
ments based on this section of IEC 1000-4 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 60-2: 1973, High-voltage test techniques - Part 2: Test procedures
IEC 68-1: 1988, Environmental testing - Part 1: General and guidance
IEC 469-1: 1987, Pulse techniques and apparatus -
Parti: Pulse terms and definitions

1000-4-9 ©IEC:1993 - 13 -
3 General
The magnetic fields to which equipment is subjected may influence the reliable operation of
equipment and systems.
The following tests are intended to demonstrate the immunity of equipment when subjected to
impulse magnetic fields related to the specific location and installation condition of the
equipment (e.g. proximity of equipment to the disturbance source).
Pulse magnetic fields are generated by lightning strokes on buildings and other metal struc-
tures including aerial masts, earth conductors and earth networks and by initial faults transients
in L.V., M.V.
and H.V. electrical systems.
In H.V. sub-stations, a pulse magnetic field may also be generated by the switching of H.V.
bus-bars and lines by circuit breakers.
The test is mainly applicable to electronic equipment to be installed in electrical plants as well
as in telecontrol centres. It is not relevant for distribution network equipment.
Possible other applications may be considered by the product committees.
The test field waveform is that of the standard current pulse, waveform 6,4/16 µs.
NOTE - The waveform 6,4/16 according to IEC 469-1 corresponds to the 8/20 µs of IEC 60-2.
4 Definitions
The following definitions and terms are used in this standard and apply to the restricted field
of magnetic disturbances; not all of them are included in the IEV(50)161.
4.1 EUT Equipment under test
4.2 Induction coil Conductor loop of defined shape and dimensions,
in which flows a current, generating a magnetic field
of defined constancy in its plane and in the enclosed
volume.
4.3 Induction coil factor
Ratio between the magnetic field strength gener-
ated by an induction coil of given dimensions and
the corresponding current value; the field is that
measured at the centre of the coil plane, without the
EUT.
4.4
Immersion method Method of application of the magnetic field to the
EUT,
which is placed in the centre of an induction
coil (figure 1).
4.5
Proximity method Method of application of the magnetic field to the
EUT, where a small induction coil is moved along
the side of the EUT in order to detect particularly
sensitive areas.
1000-4-9 © IEC:1993 -
15 -
4.6 Ground (reference) plane (GRP)
A flat conductive surface whose potential is used as
a common reference for the magnetic field gener-
ator and the auxiliary equipment (the ground plane
can be used to close the loop of the induction coil,
as in figure 5) (IEV 161-04-36, modified).
4.7
Decoupling network, back filter
Electrical circuit intended to avoid reciprocal influ-
ence with other equipment not submitted to the
magnetic field test.
4.8
Transient Pertaining to or designating a phenomenon or a
quantity which varies between two consecutive
steady states during a time interval sho
rt compared
with the time-scale of interest. (IEV 161-02-01).
5 Test levels
The preferential range of test levels is given in table 1.
The magnetic field strength is expressed in A/m; 1 A/m corresponds to a free space induction
of 1,26 µT.
Table 1 - Test levels
Level Pulse magnetic field strength
A/m (peak)
1 n.a. 2)
2 n.a 2)
1)
x special
NOTES
1 - X is an open level. This level can be given in the product specification.
2 - "n.a." = not applicable
Information on the selection of the test levels is given in annex C.
Information on actual levels is given in annex D.
6 Test equipment
The test magnetic field is obtained by a current flowing in an induction coil; the application of
the test field to the
EUT is by the immersion method.
An example of application of the immersion method is given in figure 1.
The test equipment includes the current source (test generator), th
...