IEC 61000-4-25:2001/AMD1:2012

IEC 61000-4-25 ®
Edition 1.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Electromagnetic compatibility (EMC)
Part 4-25: Testing and measurement techniques – HEMP immunity test methods
for equipment and systems
Compatibilité électromagnétique (CEM)
Partie 4-25: Techniques d’essai et de mesure – Méthodes d’essai d’immunité à
l’IEMN-HA des appareils et des systèmes
IEC 61000-4-25:2001/A1:2012
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IEC 61000-4-25 ®
Edition 1.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Electromagnetic compatibility (EMC)

Part 4-25: Testing and measurement techniques – HEMP immunity test methods

for equipment and systems
Compatibilité électromagnétique (CEM)

Partie 4-25: Techniques d’essai et de mesure – Méthodes d’essai d’immunité à

l’IEMN-HA des appareils et des systèmes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
F
CODE PRIX
ICS 33.100.99 ISBN 978-2-88912-989-8

– 2 – 61000-4-25 Amend.1 © IEC:2012
FOREWORD
This amendment has been prepared by subcommittee 77C: High power transient phenomena,
of IEC technical committee 77: Electromagnetic compatibility.
The text of this amendment is based on the following documents:
FDIS Report on voting
77C/216/FDIS 77C/218/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
2 Normative references
Replace the existing reference IEC 61000-2-10 by the following:
IEC 61000-2-10:1998, Electromagnetic compatibility (EMC) – Part 2-10: Environment –
Description of HEMP environment – Conducted disturbance
Delete from the existing list the following standards:
IEC 61000-4-12, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 12: Oscillatory waves immunity test
ISO 7137, Aircraft – Environmental conditions and test procedures for airborne equipment
Add in the existing list the following new references:
IEC 61000-4-18, Electromagnetic compatibility (EMC) – Part 4-18: Testing and measurement
techniques – Damped oscillatory wave immunity test
IEC 61000-4-33, Electromagnetic compatibility (EMC) – Part 4-33: Testing and measurement
techniques – Measurement methods for high-power transient parameters
Delete the existing footnote at the end of reference to IEC 61000-4-20.

61000-4-25 Amend.1 © IEC:2012 – 3 –
Table 2 – Early time conducted immunity test levels
Replace the existing Table 2 by the following new Table 2:
Severity level in
V I
Immunity oc sc
Waveform Basic standard the basic
test level
V A
standard
a
EC1 100 2 Damped sinusoids IEC 61000-4-18 X
a
EC2 250 5 Damped sinusoids IEC 61000-4-18 X
a
EC3 500 10 Damped sinusoids IEC 61000-4-18 1
a
EC4 1 000 20 Damped sinusoids IEC 61000-4-18 2
a
EC5 2 000 40 Damped sinusoids IEC 61000-4-18 3
a
EC6 4 000 80 Damped sinusoids IEC 61000-4-18 4
EC7 4 000 80 5/50 ns IEC 61000-4-4 4
EC8 8 000 160 5/50 ns IEC 61000-4-4 X
EC9 16 000 320 5/50 ns IEC 61000-4-4 X
EC10 25 000 500 25/500 ns This standard EC10
EC11 160 kV 3 200 10/100 ns This standard EC11
ECX Special Special Fast transient This standard ECX
NOTE 1 Voltage and current levels shown in the table are for common mode values.
NOTE 2 EC10 consists of four sublevels in addition to 25 kV: 1 kV, 4 kV, 8 kV and 16 kV.
NOTE 3 For immunity test levels EC8 and EC9, it is sufficient to test with a single pulse.
NOTE 4 EC11 consists of four sublevels in addition to 160 kV: 20 kV, 40 kV, 80 kV and 120 kV. This immunity test
level category is intended for testing equipment directly connected to long MV distribution power lines protected
against lightning. If lightning protection is not used, increase V to 1,6 MV and I to 4 000 A (see Annex A).
oc sc
a Each immunity test level consists of at least three frequencies: 3 MHz, 10 MHz and 30 MHz. The damping
parameter Q of the damped oscillatory wave test, as defined by equation (D.1) in IEC 61000-2-10:1998, ranges
from 5 to 20.
5.5.2 Conducted immunity test specifications
Replace, in the third sentence of the first paragraph, the reference “IEC 61000-4-12” by
“IEC 61000-4-18”.
Replace, in the last sentence of the existing first paragraph, the word “shall” by “should”.
Add, at the end of the first paragraph, the following sentence:
Instrumentation and measurement guidance for the special tests defined by this standard is
available in IEC 61000-4-33.
Table 6 – Conducted HEMP immunity test specifications
Replace, in the second row "Early-time EC1 – EC6", in the second column, the existing
reference “ISO 7137”by “IEC 61000-4-18”.
Delete, in the second row "Early-time EC1 – EC6", in the fourth column, the existing sentence
“See Annex D”.
Add, in the fourth and fifth rows "Early-time EC10” and “Early-time EC11”, in the fourth
column, the following sentence:

– 4 – 61000-4-25 Amend.1 © IEC:2012
IEC 61000-4-33 is applicable.
Add, in the seventh and eighth rows “Late-time LC1 – LC2” and “Late-time LC3 – LC4”, in the
fourth column, the following sentence:
IEC 61000-4-33 is applicable.
6.1.2 Instrumentation
Add, after the second sentence of the first paragraph, the following sentence:
The instrumentation and measurement techniques described in IEC 61000-4-33 are
applicable to the radiated field tests in this standard.
Replace, in the first sentence of the second paragraph, the word “shall” by “should”.
Replace, in the second sentence of the third paragraph, the word “must” by “should”.
6.2.2 Instrumentation
Replace the second sentence of the existing text by the two following new sentences:
For the special tests defined by this standard, the instrumentation and measurement
techniques described in IEC 61000-4-33 are applicable. The required overall measurement
system accuracy should be within ± 3,0 dB over a frequency range of f to f where
min max
f = 0,025/(pulse width) and f = 1,25/(pulse rise time).
min max
Replace, in the penultimate sentence, the word “must” by “should”.
7.2 Conducted disturbance test
Replace, in the last sentence of the second paragraph, the word “must” by “should”.
8.2 Immunity test level and test exposures
Replace the second sentence of the first paragraph by the two following new sentences:
Thus, each immunity test should consist of three actual test amplitudes, the immunity test
level in the table, and 50 %, and 25 % of the level. The test should start at the lowest level,
which is assumed to be below the voltage protection level provided by the SPD and the arcing
threshold.
The change in the penultimate sentence of the last paragraph, applies to the French text only.
Add, in the second sentence of the second paragraph, the new parenthesis “(6 exposures)”
between “three test amplitudes” and “for each orientation”.
Replace, in the first sentence of the third paragraph, the word “shall” by “should”.
Replace the last sentence of the third paragraph by the two following new sentences:
At least two test exposures should be performed at each of the six test amplitudes (three
positive and three negative pulses). This results in a total of 12 exposures for each major
operational mode of the test object.

61000-4-25 Amend.1 © IEC:2012 – 5 –
8.3.2 Radiated test procedure
Replace the entire existing text of the third paragraph by the following new text:
Each immunity test at a specified immunity test level consists of exposures at three test
amplitudes: the specified immunity test level, and 50 %, and 25 % of the level. A minimum of
two pulses of the field illumination shall be performed for each of the three exposure levels.
8.4 Conducted disturbance immunity test procedure
Replace the existing text of the third paragraph by the following new text:
Each immunity test at a specified immunity test level consists of exposures at three exposure
levels: the specified immunity test level, and 50 %, and 25 % of the level. A minimum of two
positive pulses and two negative pulses shall be performed for each of the three exposure
levels.
Annex D
Replace, under “Annex D”, the word “(normative)” by “(informative)”.
Replace the last two sentences of the first paragraph by the following new text:
This standard uses IEC 61000-4-18 for the damped oscillatory wave test. This annex
describes other pulse injection tests that have been used for HEMP immunity testing. An ISO
test as well as a German and a US/NATO standard are presented below for informative
purposes.
D.1 ISO 7137
Replace the first sentence of this clause by the following:
The test procedure in ISO 7137 for a damped oscillatory wave is test method 3.8 used for
lightning induced transient susceptibility.
Add, at the end of the first paragraph, the following sentence:
See reference [1] in Clause D.4 for a description of this test.
D.2 VG 96-903, Part 70
Replace the second sentence of Clause D.2 by the following:
The test method and injection generator are described in references [2] and [3] in Clause D.4.
D.3 MIL-STD-461-E, conducted susceptibility (CS116)
Replace the last sentence of Clause D.3 by the following:
This standard is described in reference [4] of Clause D.4.

– 6 – 61000-4-25 Amend.1 © IEC:2012
D.4 Reference documents
Add the following new reference [1] to the existing list and renumber the list accordingly.
[1] ISO 7137:1995, Aircraft – Environmental condition
...