IEC 61000-4-19:2014

Electromagnetic compatibility (EMC) - Part 4-19: Testing and measurement techniques - Test for immunity to conducted, differential mode disturbances and signalling in the frequency range 2 kHz to 150 kHz at a.c. power ports

IEC 61000-4-19:2014 relates to the immunity requirements and test methods for electrical and electronic equipment to conducted, differential mode disturbances and signalling in the range 2 kHz up to 150 kHz at a.c. power ports. The object of this standard is to establish a common and reproducible basis for testing electrical and electronic equipment with the application of differential mode disturbances and signalling to a.c. power ports. This standard defines:
- test waveforms;
- range of test levels;
- test equipment;
- test setup;
- test procedures;
- and verification procedures. These tests are intended to demonstrate the immunity of electrical and electronic equipment operating at a mains supply voltage up to 280 V (from phase to neutral or phase to earth, if no neutral is used) and a frequency of 50 Hz or 60 Hz when subjected to conducted, differential mode disturbances such as those originating from power electronics and power line communication systems. The immunity to harmonics and interharmonics, including mains signalling, on a.c. power ports up to 2 kHz in differential mode is covered by IEC 61000-4-13. Emissions in the frequency range 2 kHz to 150 kHz often have both differential mode and common mode components. This standard provides immunity tests only for differential mode disturbances and signalling. It is recommended to perform common mode tests as well, which are covered by IEC 61000-4-16. Key words: electromagnetic compatibility, EMC

Compatibilité électromagnétique (CEM) - Partie 4-19: Techniques d'essai et de mesure - Essai pour l'immunité aux perturbations conduites en mode différentiel et à la signalisation dans la gamme de fréquence de 2 kHz à 150 kHz, aux accès de puissance à courant alternatif

L'IEC 61000-4-19:2014 traite des exigences en matière d'immunité et des méthodes d'essai relatives aux matériels électriques et électroniques soumis à des perturbations et des signaux par conduction en mode différentiel dans la bande de fréquences de 2 kHz à 150 kHz, aux accès de puissance à courant alternatif. L'objet de la présente norme est d'établir une base commune et reproductible destinée à soumettre à essai les performances des matériels électriques et électroniques lorsque ceux-ci sont soumis à des perturbations et des signaux par conduction en mode différentiel sur les accès de puissance en courant alternatif. La présente norme définit:
- les formes d'onde d'essai;
- les plages de niveaux d'essai;
- le matériel d'essai;
- l'installation d'essai;
- les procédures d'essai;
- et les procédures de vérification. Ces essais sont destinés à démontrer l'immunité des équipements électriques et électroniques fonctionnant sous une tension d'alimentation du réseau jusqu'à 280 V (phase-neutre ou phase-terre, si le neutre n'est pas utilisé) et une fréquence de 50 Hz ou 60 Hz lorsqu'ils sont soumis à des perturbations conduites en mode différentiel, telles que celles provenant de l'électronique de puissance et des systèmes de communication par courants porteurs en ligne. L'immunité aux harmoniques et interharmoniques, incluant les signaux transmis sur le réseau électrique, sur les accès de puissance jusqu'à 2 kHz en mode différentiel est traitée par l'IEC 61000-4-13. Les émissions dans la gamme de fréquences de 2 kHz à 150 kHz ont souvent des composantes en mode différentiel et en mode commun. La présente norme fournit les essais d'immunité pour les signaux et perturbations en mode différentiel uniquement. Il est recommandé d'effectuer aussi des essais en mode commun, qui sont traités par l'IEC 61000-4-16. Mots clé: compatibilité électromagnétique, CEM, EMC

General Information

• Status: Published
• Publication Date: 06-May-2014
• ICS: 33.100.20 - Immunity
• Technical Committee: SC 77A - EMC - Low frequency phenomena
• Drafting Committee: WG 6 - TC 77/SC 77A/WG 6
• Current Stage: PPUB - Publication issued
• Start Date: 07-May-2014
• Completion Date: 31-May-2014

Standards Content (Sample)

IEC 61000-4-19 ®
Edition 1.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
Electromagnetic compatibility (EMC) –
Part 4-19: Testing and measurement techniques – Test for immunity to
conducted, differential mode disturbances and signalling in the frequency range
2 kHz to 150 kHz at a.c. power ports

Compatibilité électromagnétique (CEM) –
Partie 4-19: Techniques d’essai et de mesure – Essai pour l'immunité aux
perturbations conduites en mode différentiel et à la signalisation dans la gamme
de fréquences de 2 kHz à 150 kHz, aux accès de puissance à courant alternatif

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IEC 61000-4-19 ®
Edition 1.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM

Electromagnetic compatibility (EMC) –

Part 4-19: Testing and measurement techniques – Test for immunity to

conducted, differential mode disturbances and signalling in the frequency range

2 kHz to 150 kHz at a.c. power ports

Compatibilité électromagnétique (CEM) –

Partie 4-19: Techniques d’essai et de mesure – Essai pour l'immunité aux

perturbations conduites en mode différentiel et à la signalisation dans la gamme

de fréquences de 2 kHz à 150 kHz, aux accès de puissance à courant alternatif

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 33.100.20 ISBN 978-2-8322-1565-4

– 2 – IEC 61000-4-19:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
3.1 Terms and definitions. 8
3.2 Abbreviations . 9
4 General . 9
5 Test levels and wave profiles in the frequency range 2 kHz to 150 kHz . 10
5.1 Test levels for differential voltage testing . 10
5.1.1 General . 10
5.1.2 Test wave profile with CW pulses with pause . 11
5.1.3 Test wave profile with rectangularly modulated pulses . 12
5.2 Test levels for differential current testing . 12
5.2.1 General . 12
5.2.2 Test wave profile with CW pulses with pause . 13
5.2.3 Test wave profile with rectangularly modulated pulses . 13
6 Test equipment . 13
6.1 Test generators . 13
6.1.1 General . 13
6.1.2 Characteristics and performance of the generator for the differential
voltage test . 14
6.1.3 Characteristics and performance of the generator for the differential
current test . 14
6.2 Verification of the characteristics of the test generators . 15
6.2.1 General . 15
6.2.2 Verification of the generators . 15
6.2.3 Verification of the coupling/decoupling network . 16
7 Test setups . 17
7.1 Test setup for differential mode voltage testing . 17
7.2 Test setup for differential mode current test . 18
8 Test procedure . 18
8.1 General . 18
8.2 Laboratory reference conditions . 19
8.2.1 Climatic conditions . 19
8.2.2 Electromagnetic conditions . 19
8.3 Execution of the test . 19
9 Evaluation of test results . 19
10 Test report . 20
Annex A (informative) Interference sources, victims and effects . 21
Annex B (informative) Selection of test levels . 25
Annex C (informative) Testing electricity meters guideline . 27
C.1 Example of the basic structure of a test generator for differential current
testing. 27
C.2 Example of a test circuit . 28

C.3 Example of a realized setup including schematics . 29
Annex D (informative) Test wave profiles . 30
Bibliography . 31

Figure 1 – Frequency vs. amplitude profile for differential voltage testing . 11
Figure 2 – Test wave profile with CW pulses with pause . 12
Figure 3 – Test wave profile with rectangularly modulated pulses for differential
voltage testing . 12
Figure 4 – Example of a simplified circuit diagram with the major elements of the
differential voltage test generator . 14
Figure 5 – Test setup for verification of the CDN in a 10 Ω measurement system. 16
Figure 6 – Limit for the damping characteristics measured in a 10 Ω measurement
system . 17
Figure 7 – Example of test setup for differential mode voltage testing with auxiliary
equipment . 17
Figure 8 – Example of test setup for differential mode current testing . 18
Figure A.1 – Standards dealing with voltage levels due to non-intentional emissions in
the frequency range 2 kHz to 150 kHz . 23
Figure A.2 – Standards dealing with voltage levels due to intentional emissions in the
frequency range 2 kHz to 150 kHz . 24
Figure C.1 – Simplified circuit of a differential current test generator . 27
Figure C.2 – Example of a test circuit . 28
Figure C.3 – Example for a realized test set up . 29

Table 1 – Test levels in the 2 kHz to 150 kHz frequency range for differential voltage
testing . 10
Table 2 – Test levels in the 2 kHz to 150 kHz frequency range for differential current
testing . 13

– 4 – IEC 61000-4-19:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMAGNETIC COMPATIBILITY (EMC) –

Part 4-19: Testing and measurement techniques – Test for immunity
to conducted, differential mode disturbances and signalling in the
frequency range 2 kHz to 150 kHz at a.c. power ports

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61000-4-19 has been prepared by subcommittee 77A: EMC – Low
frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility.
It forms Part 4-19 of IEC 61000. 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:
FDIS Report on voting
77A/845/FDIS 77A/854/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61000 series, published under the general title Electromagnetic
compatibility (EMC), can be found on the IEC website.
The committee has decided that the contents of this 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 61000-4-19:2014 © IEC 2014
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 (in so far as they do not fall under the responsibility 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 as technical specifications or technical reports, some of which have already been published
as sections. Others are published with the part number followed by a dash and a second
number identifying the subdivision (example: IEC 61000-6-1).

ELECTROMAGNETIC COMPATIBILITY (EMC) –

Part 4-19: Testing and measurement techniques – Test for immunity
to conducted, differential mode disturbances and signalling in the
frequency range 2 kHz to 150 kHz at a.c. power ports

1 Scope
This part of IEC 61000 relates to the immunity requirements and test methods for electrical
and electronic equipment to conducted, differential mode disturbances and signalling in the
range 2 kHz up to 150 kHz at a.c. power ports.
The object of this standard is to establish a common and reproducible basis for testing
electrical and electronic equipment with the application of differential mode disturbances and
signalling to a.c. power ports. This standard defines:
– test waveforms;
– range of test levels;
– test equipment;
– test setup;
– test procedures;
– verification procedures.
These tests are intended to demonstrate the immunity of electrical and electronic equipment
operating at a mains supply voltage up to 280 V (from phase to neutral or phase to earth, if no
neutral is used) and a frequency of 50 Hz or 60 Hz when subjected to conducted, differential
mode disturbances such as those originating from power electronics and power line
communication systems (PLC).
NOTE In some countries, the maximum voltage can be as much as 350 V from phase to neutral.
The immunity to harmonics and interharmonics, including mains signalling, on a.c. power
ports up to 2 kHz in differential mode is covered by IEC 61000-4-13.
Emissions in the frequency range 2 kHz to 150 kHz often have both differential mode and
common mode components. This standard provides immunity tests only for differential mode
disturbances and signalling. It is recommended to perform common mode tests as well, which
are covered by IEC 61000-4-16.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) – Part 4-13: Testing and
measurement techniques – Harmonics and interharmonics including mains signalling at a.c.
power port, low frequency immunity tests
Amendment 1:2009
IEC 61000-4-16:1998, Electromagnetic compatibility (EMC) – Part 4-16: Testing and
measurement techniques – Test for immunity to conducted, common mode disturbances in

– 8 – IEC 61000-4-19:2014 © IEC 2014
the frequency range 0 Hz to 150 kHz
Amendment 1:2001
Amendment 2:2009
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE The terms apply to the restricted field of conducted, differential mode disturbances and signalling in the
range of 2 kHz up to 150 kHz (not all of these definitions are included in IEC 60050-161).
3.1 Terms and definitions
3.1.1
auxiliary equipment
AE
equipment that is necessary for setting up all functions and assessing the correct
performance (operation) of the EUT (equipment under test) during the test
3.1.2
port
particular interface of the specified equipment with the external electromagnetic environment
3.1.3
a.c. power port
port of connection to power supply networks
3.1.4
coupling
interaction between circuits, transferring energy from one circuit to another
3.1.5
coupling network
electrical circuit for the purpose of transferring energy from one circuit to another
3.1.6
immunity (to a disturbance)
ability of a device, equipment or system to perform without degradation in the presence of an
electromagnetic disturbance
[SOURCE: IEC 60050-161:1990, 161-01-20]
3.1.7
differential mode voltage
symmetrical voltage
voltage between any two of a specified set of active conductors
[SOURCE: IEC 60050-161:1990, 161-04-08]
3.1.8
differential mode current
I
Diff
in a two-conductor cable, or for two particular conductors in a multi-conductor cable, half the
magnitude of the difference of the phasors representing the currents in each conductor
[SOURCE: IEC 60050-161:1990, 161-04-38]

3.1.9
load current
I
Load
for the EUT which has a dedicated a.c. current measurement port, this is the current at power
frequency flowing through the current path of the EUT, e.g. in an electricity meter, typically
the load current I is flowing through the live wires L to L of the meter
Load IN OUT
3.2 Abbreviations
BB Broadband
CDN Coupling/decoupling network
CW Continuous wave
EUT Equipment under test
LV Low voltage
MV Medium voltage
NB Narrowband
PLC Power line communications
4 General
Conducted, differential mode disturbances and signalling in the frequency range 2 kHz up to
150 kHz may influence the performance of equipment and systems installed in all
electromagnetic environments. Therefore in this frequency range, differential mode
disturbances and signalling are to be taken into account.
As coupling of these disturbances and signalling could be very strong for a.c. power ports but
is only relatively weak for all the other ports, the requirements of this standard apply to a.c.
power ports only.
The disturbances and signalling are typically generated by:
– power line communication systems;
– power electronic equipment (e.g. power converters, lighting).
Annex A contains information on the interference sources, victims and effects.
Annex D provides the rationale for the test wave profiles and some recommendations for the
choice of the tests.
Adequate immunity to these differential mode disturbances and signalling is necessary. To
verify such immunity, two tests for voltage and current are defined in this standard, both in the
frequency range from 2 kHz to 150 kHz:
– a sweep test performed with CW (continuous wave) pulses with pauses between each
pulse;
– a test performed with blocks of rectangularly modulated pulses with four different
modulation frequencies.
Typically, voltage tests apply to all equipment, while current tests are intended for equipment
with an a.c. current measurement port, such as an electricity meter.
Product committees are free to choose between voltage and current tests, test levels, type of
modulation and modulation frequencies.
Nevertheless, it is recommended to perform immunity tests including at least a sweep test
performed with CW pulses with pause and another test with rectangularly modulated pulses

– 10 – IEC 61000-4-19:2014 © IEC 2014
with modulation frequencies of 3 Hz and 101 Hz for power frequency at 50 Hz (or 4 Hz and
121 Hz at 60 Hz) which reflect the interference due to inverters and mains communication
systems.
NOTE Test levels proposed in Clause 5 may be revised in the future in order to take into account work underway
on compatibility levels (IEC 61000-2-2 and IEC 61000-2-12).
5 Test levels and wave profiles in the frequency range 2 kHz to 150 kHz
5.1 Test levels for differential voltage testing
5.1.1 General
Test levels for differential voltage testing to a.c. power ports in the frequency range from
2 kHz up to 150 kHz are given in Table 1.
A guide for the selection of the test level is given in Annex B.
The level in column 1 of Table 1 makes reference to the environment class (Class 1, Class 2,
etc.) defined in Annex B. Table 1 gives the preferred values of test voltage levels for
equipment used in the corresponding environment class.
Table 1 – Test levels in the 2 kHz to 150 kHz
frequency range for differential voltage testing
Open circuit unmodulated test voltage
V (r.m.s.)
Level
2 kHz to 9 kHz 9 kHz to 95 kHz 95 kHz to 150 kHz
1 0,5 0,5 to 0,1 0,1
2 3 3 to 0,6 0,6
3 12 12 to 2,4 2,4
4 20 20 to 10 10
a
X Special Special Special
a
"X" can be any level, above, below or in between the others. The level shall be specified by the product
standard.
As shown in Figure 1, where the profile for each of the open circuit test voltage defined in
Table 1 in relation to the frequency is given, the test voltage varies with frequency as follows:
• the level is constant from 2 kHz to 9 kHz;
• the logarithm of the level decreases linearly with the logarithm of the frequency from 9 kHz
to 95 kHz;
• the level is constant from 95 kHz to 150 kHz.

Level 4
Level 3
Level 2
Level 1
0,1
1 10 100
Frequency  (kHz)
IEC  1447/14
Figure 1 – Frequency vs. amplitude profile for differential voltage testing
On the basis of investigations currently available (see Annex A), differential mode tests with
two types of modulation are required: one with CW pulses with pauses between each pulse
(5.1.2, respectively 5.2.2), and another with blocks of rectangularly modulated pulses (5.1.3,
respectively 5.2.3 ).
5.1.2 Test wave profile with CW pulses with pause
The test is carried out by applying a sequence of pulses of a sinusoidal signal (CW) with an
increasing frequency f ranging from 2 kHz to 150 kHz and pauses of a defined duration as
i
follows (see also Figure 2):
• Each CW pulse has a duration (dwell time) of T .
pulse
• Between each CW pulse the level of the test signal (voltage or current) is zero for a period
of T = 300 ms with a tolerance of ± 200 ms.

pause
• The dwell time T shall not be less than the time necessary for the EUT to be exercized
pulse
and to respond, but shall not be less than 3 s. Product committees may consider requiring
longer dwell times.
• The duration of one test cycle for a specific CW test frequency is T + T
.
pulse pause
• The start frequency of the CW test signal shall be 2 kHz and the frequency of the
successive CW test signals shall be increased by 2 % with respect to the previous test
frequency: f = 1,02 f
.
i i-1
• The turn-off times at the end of a CW pulse (start of the pause) and the turn-on times at
the beginning of a CW pulse (end of the pause) of the test voltages (at frequencies f , f ,
i i+1
….) need not be synchronized with the zero crossings of the CW test signal.
Voltage rms  (V)
– 12 – IEC 61000-4-19:2014 © IEC 2014
f f = f x 1,02
i i+1 i
t
T
T
pulse
pulse
T T
pause
pause
IEC  1448/14
Figure 2 – Test wave profile with CW pulses with pause
5.1.3 Test wave profile with rectangularly modulated pulses
The test is performed by applying a sequence of pulses with an increasing frequency ranging
from 2 kHz to 150 kHz that is pulse-modulated with four different modulation frequencies with
a duty cycle of 50 % as follows (see also Figure 3):
• The sequence of pulses at frequency f for a chosen modulation frequency has a duration
i
(dwell time) of T = 3 s.
dwell
• The start frequency of the pulses shall be 2 kHz and the frequency of the successive
sequence of pulses shall be increased by 2 % with respect to the previous frequency: f =
i
. Between two dwell times there is a pause of 300 ms with a tolerance of ± 200 ms.
1,02 f
i-1
For the four specified tests with rectangularly modulated pulses, the modulation
frequencies f depend on the applicable mains power frequency as follows:

mod
50 Hz: 3 Hz; 101 Hz; 301 Hz; 601 Hz,
60 Hz: 4 Hz; 121 Hz; 361 Hz; 721 Hz.
• The modulation period T for a certain modulation frequency f has the following
mod mod
relation: T =1/ f
mod mod
• The turn-off times at the end of a pulse and the turn-on times at the beginning of a pulse

need not be synchronized with the zero crossings of the pulses.
f f = f x 1,02
i i+1 i
t
T
mod
T T T
dwell pause dwell
IEC  1449/14
Figure 3 – Test wave profile with rectangularly modulated pulses
for differential voltage testing
5.2 Test levels for differential current testing
5.2.1 General
Table 2 shows the test levels in the 2 kHz to 150 kHz frequency range for differential current
testing.
A guide for the selection of the test level is given in Annex B.
The level in column 1 of Table 2 makes reference to the class environment (Class 1, Class 2,
etc.) defined in Annex B. Table 2 gives the preferred values of test current levels for
equipment used in the corresponding class environment.
Table 2 – Test levels in the 2 kHz to 150 kHz
frequency range for differential current testing
Unmodulated current in A (r.m.s.)
Level
2 kHz to 30 kHz 30 kHz to 150 kHz
1 1
0,5
2 2 1
3 3 1,5
4 4 2
a
X
Special Special
At the transition frequency, the higher level applies.
a
"X" can be any level, above, below or in between the others. The level shall be specified by the product
standard.
Two types of differential current test modulation are defined, one with CW pulses with pauses
between each pulse (5.2.2), and another with blocks of rectangularly modulated pulses (5.2.3).
Product committees shall define if only one or both modulation types shall be applied.
5.2.2 Test wave profile with CW pulses with pause
The same test wave profile as defined for differential voltage testing in 5.1.2 is applicable.
Product committees may define frequency step sizes smaller than specified in 5.1.2. As an
example, this test profile is applied for electricity meters.
5.2.3 Test wave profile with rectangularly modulated pulses
The same test wave profile as defined for differential voltage testing in 5.1.3 is applicable.
Product committees may define frequency step sizes smaller than specified in 5.1.3.
6 Test equipment
6.1 Test generators
6.1.1 General
The features of the test generator for differential voltage testing are given in 6.1.2. The
features of the test generator for differential current testing are given in 6.1.3.
All the generators shall have provisions to prevent emissions which, if injected in the power
supply network, may influence the test results.
A single electronic a.c. power source for both the differential voltage test and for the
differential current test can be used as test generator. For the differential test voltage
generator, the values of C and L included in Figure 4 are determined by the performance
requirements.
– 14 – IEC 61000-4-19:2014 © IEC 2014
6.1.2 Characteristics and performance of the generator for the differential voltage
test
The differential voltage test generator typically consists of a waveform generator capable of
covering the frequency band of interest and to provide CW pulses as shown in Figure 2 and
modulated pulses as shown in Figure 3.
Differential mode voltage generator:
– waveform: sinusoidal, total harmonic distortion less
than 5 % for all the frequencies in the
range;
– open circuit output voltage range (r.m.s.): 0,1 V (–10 %) to 20 V (+10 %);
– impedance at EUT connection terminals: 10 Ω; ± 30 % across the range 2 kHz to
150 kHz;
– frequency range: 2 kHz to 150 kHz;
– on/off switching of the output voltage: no synchronization to mains of power
source;
– tolerance of differential voltage test level: ± 5 %.
These parameters shall be verified on the EUT port of the coupling network with a short circuit
on the mains port.
An example of the schematic in principle of the differential mode test generator is given in
Figure 4.
L
C
L1 d
Components:
Mains or
Generator: 2 – 150 kHz
power source
L
C = Coupling capacitor
c
N C = Decoupling capacitor
d
L = Decoupling inductance
CDN = Coupling/Decoupling network
PE CDN
C
c
L1'
EUT
N'
Generator
PE
IEC  1450/14
Figure 4 – Example of a simplified circuit diagram with
the major elements of the differential voltage test generator
6.1.3 Characteristics and performance of the generator for the differential current
test
The differential current test generator typically consists of a waveform generator capable of
covering the frequency band of interest and to provide CW pulses as shown in Figure 2 and
modulated pulses as shown in Figure 3.
– waveform: sinusoidal, total harmonic distortion less
than 5 % for all the frequencies in the
range;
– short circuit output current range (r.m.s.): 0,5 A (–10 %) to 4 A (+10 %), see Note;

– impedance: 1 Ω; ± 30 % across the range 2 kHz to
150 kHz;
– frequency range: 2 kHz to 150 kHz;
– on/off switching of the output current: no synchronization to mains of power
source;
– tolerance of differential current test level ± 5 %.
NOTE A value of 0,01 A instead of 0,5 A of short circuit output current can be necessary for testing transformer
connected electricity meters.
These parameters shall be verified on the EUT port of the test configuration. The value 1 Ω of
the impedance is obtained from the open circuit voltage divided by the short circuit output
current measured at the same frequency.
More detailed information for testing particular equipment such as electricity meters is
included in Annex C.
6.2 Verification of the characteristics of the test generators
6.2.1 General
In order to make it possible to compare the results dealing with different test generators, they
shall be calibrated or verified for the most essential characteristics.
The following generator characteristics shall be verified:
– output voltage waveform in open circuit,
– output current waveform in short circuit,
– output voltage/current accuracy,
– generator impedance,
– frequency accuracy.
6.2.2 Verification of the generators
The verification of the generators shall be carried out in open circuit for the differential voltage
generator with a differential probe of minimum 1 MΩ and in short circuit for the differential
current generator with a shunt of maximum 0,01 Ω using an oscilloscope or other equivalent
measurement instrumentation with 10 MHz minimum bandwidth.
The accuracy shall be sufficient to comply with voltage, current and impedance requirements.
For the correct setting of the generator and modulated pulse test level, the procedures given
in 5.1.2 and 5.1.3 shall be applied.
The generator for voltage testing shall comply with 6.1.2 and test levels of Table 1 in 5.1.1.
The generator for current testing shall comply with 6.1.3 and test levels of Table 2 in 5.2.1.
The coupling/decoupling network (CDN) shall comply with the requirements of 6.2.3.
For differential voltage verification, the open circuit voltage at the EUT port of the CDN shall
be measured with the voltage differential probe.
For differential current verification, the short circuit current at the EUT port shall be measured
using the shunt.
– 16 – IEC 61000-4-19:2014 © IEC 2014
The impedance shall be verified measuring the values of the open circuit voltage divided by
the short circuit output current at 2 kHz and 150 kHz.
6.2.3 Verification of the coupling/decoupling network
The damping characteristics (mains to EUT) of the CDN shown in Figure 4 shall be verified in
a 10 Ω measurement system using impedance matching baluns and a network analyser. The
generator port should be terminated by 10 Ω or by the generator having 10 Ω output
impedance. Figure 5 shows the basic principle of the test setup.
NETWORK ANALYSER
Balun
50 Ω/10 Ω
Mains port
Balun
10 Ω/50 Ω
CDN
IEC  1451/14
Figure 5 – Test setup for verification of the CDN in a 10 Ω measurement system
The limit for the minimum damping of the coupling network and a measurement example are
shown in Figure 6. The limit decreases linearly with the log of the frequency from 10 dB at
2 kHz to 50 dB at 50 kHz and remains constant at 50 dB from 50 kHz to 150 kHz.
10 Ω
Generator port
EUT port
dB
Decoupling attenuation (EUT – mains)
f  (kHz)
Measurement example Limit
IEC  1452/14
Figure 6 – Limit for the damping characteristics
measured in a 10 Ω measurement system
7 Test setups
7.1 Test setup for differential mode voltage testing
A test setup for the differential voltage test defined in 5.1.2 and 5.1.3 is shown in Figure 7.
L
C
L1 d
Mains or
power source
auxiliary
L
equipment AE
N
PE
CDN
C
c
L1'
EUT
N' with
auxiliary
Generator
equipment AE
PE
IEC  1453/14
Figure 7 – Example of test setup for differential mode
voltage testing with auxiliary equipment
The EUT shall be connected to the earthing system in accordance with the manufacturer's
specifications. The equipment under test shall be arranged and connected according to the
equipment installation specifications.
The operating signals for exercising the EUT may be provided by the AE or simulator, e.g. a
PLC modem.
The cables specified by the equipment manufacturer shall be used; in the absence of
specifications, unshielded cables shall be adopted, of the type suitable for the signals
involved.
– 18 – IEC 61000-4-19:2014 © IEC 2014
7.2 Test setup for differential mode current test
The differential current test setup, shown in Figure 8, is used with EUTs such as e.g.
electricity meters having an a.c. current measurement port. One current is the load current
I at power frequency and the second is the differential current I in the frequency range
Load Diff
from 2 kHz to 150 kHz, flowing only through the current path of EUT. Both currents, I and
Load
I are generated independently from each other.
Diff
Mains
I I
Load Diff
voltage
Voltage Current Current
EUT
source source source
IEC  1454/14
Figure 8 – Example of test setup for differential mode current testing
The method to generate the differential test current I flowing through the a.c. current
Diff
measurement port of the EUT is not given as specification or requirement in detail. The
important parameter is the level of current I flowing into the a.c. current measurement port
Diff
of the EUT.
The method to generate both the differential current I and the load current I is not of
Diff Load
interest for the result of the test.
The equipment under test shall be arranged and connected according to the equipment
installation specifications.
The cables specified by the equipment manufacturer shall be used; in the absence of
specifications, unshielded cables suitable
...