CISPR 16-2-1:2014/AMD1:2017

CISPR 16-2-1 ®
Edition 3.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE

COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES

BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
AMENDMENT 1
AMENDEMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques –
Partie 2-1: Méthodes de mesure des perturbations et de l'immunité – Mesures
des perturbations conduites
CISPR 16-2-1:2014-02/AMD1:2017-06 (en-fr)

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CISPR 16-2-1 ®
Edition 1.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE

COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES

BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM

AMENDMENT 1
AMENDEMENT 1
Specification for radio disturbance and immunity measuring apparatus and

methods –
Part 2-1: Methods of measurement of disturbances and immunity – Conducted

disturbance measurements
Spécifications des méthodes et des appareils de mesure des perturbations

radioélectriques et de l'immunité aux perturbations radioélectriques –

Partie 2-1: Méthodes de mesure des perturbations et de l'immunité – Mesures

des perturbations conduites
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10, 33.100.20 ISBN 978-2-8322-4393-0

– 2 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
FOREWORD
This amendment has been prepared by subcommittee CISPR A: Radio-interference
measurements and statistical methods, of IEC technical committee CISPR: International
special committee on radio interference.
The text of this amendment is based on the following documents:
CDV Report on voting
CISPR/A/1168/CDV CISPR/A/1201/RVC

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 website 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 publication using a colour printer.

_____________
1 Scope
Replace the existing first paragraph by the following new paragraph:
This part of CISPR 16 is designated a basic standard that specifies the methods of
measurement of disturbance phenomena in general in the frequency range 9 kHz to 18 GHz,
and especially of conducted disturbance phenomena in the frequency range 9 kHz to 30 MHz.
The CDNE extends the frequency range of conducted disturbance measurements to 300 MHz.
3.1 Terms and definitions
3.1.2
artificial network
AN
Replace the existing definition and note by the following new definition and new note:
network that provides a defined impedance to the EUT at radio frequencies, couples the
disturbance voltage to the measuring receiver, and decouples the test circuit from the mains
network or other power lines or from signal lines with associated equipment

© IEC 2017
Note 1 to entry: There are four basic types of this network: the V-network (V-AN), which couples the unsymmetric
voltages; the delta-network (Δ-AN), which couples symmetric (DM) and asymmetric (CM) voltages separately; the
Y-network (Y-AN); and the coaxial (screened cable) network, which couple asymmetric (CM) voltages.
3.1.3
artificial mains network
AMN
Replace the existing Note 1 to entry by the following new note:
Note 1 to entry: There are two basic types of this network: the V-network (V-AMN), which couples the unsymmetric
voltages; and the delta-network (Δ-AMN), which couples symmetric (DM) and asymmetric (CM) voltages
separately.
3.1.6
asymmetric voltage
Replace the existing definition and note by the following new definition and new note:
RF voltage appearing between the electrical mid-point of the individual terminals or leads in a
two- or multi-wire circuit and reference ground, sometimes called the CM voltage
Note 1 to entry: If, in case of a LV AC mains power port, V is the vector voltage between one of the mains
a
terminals and reference ground, and V is the vector voltage between the other mains terminal and reference
b
ground, the asymmetric voltage is half the vector sum of V and V , i.e. (V + V )/2.
a b a b
3.1.7
symmetric voltage
Replace the existing definition and note by the following new definition and new note:
RF voltage appearing between any pair of wires not comprising the wire at ground potential in
a two- or multi-wire circuit, such as a single-phase mains supply or a bundle of twisted pairs
in a communication cable, sometimes called the DM voltage
Note 1 to entry: In case of a LV AC mains power port, the symmetric voltage is the vector difference (V – V ).
a b
3.1.8
unsymmetric mode voltage
Replace the existing term, definition and notes by the following new term, definition and note:
3.1.8
unsymmetric voltage
RF voltage appearing between an individual terminal or lead in a two- or multi-wire circuit and
reference ground
Note 1 to entry: The unsymmetric voltage is the voltage measured by the use of an artificial mains V-network. It
denotes the amplitude of the vector voltage, V or V (mentioned in the notes to entry in 3.1.6 and 3.1.7).
a b
3.1.25
reference ground plane
RGP
Replace the existing definition and notes by the following new definition and new notes:
flat, conductive surface that is at the same electric potential as reference ground, which is
used as a common reference, and which contributes to a reproducible parasitic capacitance
with the surroundings of the EUT
Note 1 to entry: A reference ground plane is needed for the measurements of conducted disturbances, and serves
as reference for the measurement of unsymmetric and asymmetric disturbance voltages.
Note 2 to entry: This note applies to the French language only.
Note 3 to entry: In some regions, the term ‘reference earth’ is used in place of ‘reference ground’.

– 4 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
3.2 Abbreviations
Add to the existing list the following new abbreviations:
DM Differential mode
Δ-AN Artificial Δ-network (‘Δ’ is pronounced ‘delta’)
GCPC Grid connected power convertor
LV Low voltage
RFI Radio frequency interference
UM Unsymmetric mode
V-AMN Artificial mains V-network
V-AN Artificial V-network
Y-AN Artificial Y-network
5.3 Connections to RF reference ground
Delete, in the existing title, the abbreviated term "RF".
Replace the second paragraph (the paragraph following NOTE 1) by the following new
paragraphs:
The measurement of unsymmetric (UM) or terminal voltages and asymmetric (CM) voltages
shall be referenced only to the reference ground. Ground loops (common impedance
coupling) shall be avoided. Ground loops will negatively affect repeatability of measurement
and can, e.g. be detected if grounded components of a test set-up are touch-sensitive. This
should also be observed for measuring apparatus (e.g. measuring receivers and connected
ancillary equipment, such as oscilloscopes, analyzers, recorders, etc.) fitted with a PE
conductor of safety class I equipment.
NOTE 3 A detrimental ground loop can be detected when the components of a test set-up are touch-sensitive, i.e.
the reading changes when the component is touched.
The measuring instrumentation shall be provided with RF isolation so that the AN has only
one RF connection to reference ground. This can be accomplished by using RF chokes and
isolation transformers, or by powering the measuring apparatus from batteries. Figure 1
shows an example of a recommended test set-up with three AMNs and PE chokes for the
avoidance of ground loops. In this figure, also the receiver RF connecting cable to the AMN
can act as a ground connection if the receiver is grounded. Therefore, either a PE choke is
needed at the receiver power input, or, if the receiver is outside a shielded room, a sheath
current suppressor is needed on the connecting cable. Each AMN is thus RF-grounded only
once.
5.4 Connections between the EUT and the artificial mains network
Delete, in the existing title, the word "mains".
Add, after the existing first sentence of this subclause, the following new sentence:
The same guidelines also apply for selection of connections of the EUT to other types of AN
used for the termination of ports other than LV AC mains ports.
6.4.5 Supply
Replace the existing text of this subclause by the following new text:

© IEC 2017
The EUT shall be operated from a supply having the rated voltage of the EUT. EUTs with
more than one rated voltage shall be tested at the rated voltage which causes maximum
disturbance. Product standards may call for additional measurements at supply voltages
within the rated supply voltage range, if, for example, the levels of disturbance vary
considerably with the actual supply voltage used during the measurements.
7.1 General
Replace the existing item a), including the note, by the following new item:
a) the types of disturbance: there are two methods of measuring conducted disturbances,
either as a voltage (prevailing method for CISPR measurements) or as a current. Both
methods can be used to measure the three types of conducted disturbance, i.e.:
– common mode (also called asymmetric mode, i.e. the vector sum of voltages/currents
in a bundle or group of wires in relation to reference ground);
– differential mode (also called symmetric mode);
– unsymmetric mode (voltage between a terminal of the port under test and reference
ground).
NOTE The unsymmetric voltage is primarily measured at the LV AC mains power port. The CM voltage (or
current) is measured primarily at telecommunication, signal and control ports.
7.3.2.1 General
Replace the existing text of this subclause by the following new text:
The CM, DM and UM impedances of actual networks, such as power mains and
telecommunication networks, are location dependent and, in general, time varying. Therefore,
type testing of disturbance requires standardized impedance simulation networks, referred to
as artificial networks (ANs). The AN provides standardized RF load impedances to the EUT
and simultaneously decouples the laboratory LV AC mains and/or DC power source or other
type of peripheral and ancillary equipment, like a signal simulator, from the EUT. For this
purpose, the AN is inserted between the terminals of the EUT and the actual network or signal
simulator. In this way, the AN simulates extended networks (long lines) with defined
impedances.
7.3.2.2 Types of artificial networks
Replace the existing text, including items a), b) and c), by the following new text:
The ANs specified in CISPR 16-1-2 shall be used, unless specific reasons call for another
construction. In general, three types of AN can be distinguished:
a) V-AN (typically used as V-AMN, or LISN): in a defined frequency range, the RF
impedances between each of the EUT terminals to be measured and the reference ground
have a defined value, whereas no additional separate impedance component is connected
directly between these terminals. The construction defines (indirectly) the measurement of
the vector sum of both the symmetric (DM) and asymmetric (CM) voltages, i.e. of the
composite unsymmetric (UM or terminal) disturbance voltage. In principle, there is no limit
for the number of EUT terminals, i.e. for the number of lines to be measured by V-ANs;
b) Δ-AN: in a defined frequency range, the RF impedances between a pair of EUT terminals
to be measured (and not comprising the grounding terminal) and between the electrical
mid-point of these terminals and the reference ground have defined values. This
construction defines directly both the symmetric (DM) and the asymmetric (CM) RF load
impedances. Addition of a balance/unbalance transformer makes it possible to measure
the symmetric (DM) and asymmetric (CM) disturbance voltages separately. Practical
implementations of Δ-ANs are presently (2016) furnished only with connectors for a total
of three individual EUT terminals, inclusive of common ground;
c) Y-AN (also called the asymmetric artificial network, AAN, or ISN): in a defined frequency
range, the CM RF impedance between the electrical mid-point of a pair of EUT terminals

– 6 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
to be measured and the reference ground has a defined value. In general, no defined
differential load impedance is included in a Y-AN as such. The defined DM impedance
shall then be provided by the external circuit connected to the supply (line) terminals of
the Y-AN. This type of AN is used to measure CM disturbance voltages only.
7.3.3 Current probes
Replace the existing first paragraph by the following new paragraph:
Current probes or current transformers allow the measurement of all three types of
disturbance current (see 7.1 and CISPR 16-1-2) on mains and other power supply leads,
signal lines, load lines, etc. A clip-on construction of the probe will facilitate its use.
7.4 Equipment under test configuration
Replace the existing title by the following new title:
7.4 Configuration of the EUT and method of measurement
7.4.1 Arrangement of the EUT and its connection to the AN
Replace the existing first paragraph by the following new paragraph:
For measurement of the disturbance voltage, the EUT is connected to the laboratory LV AC
and/or DC power supply and any other extended network via one or more AN(s) in
accordance with the following requirements. In general, the V-AMN is used for the LV AC
mains power port (see Figure 9) in accordance with the following requirements. For
termination of LV DC power ports under test, 150 Ω Δ-ANs per CISPR 16-1-2 can be used
(see Figure 26). CISPR product publications supply additional test details relevant to
particular EUTs.
Replace, in the second paragraph, the existing third dashed item by the following new item:
– the ANs are placed on the floor as shown in Figure 9 in such a way that one side of the
AN housing is 40 cm from the vertical RGP and other metallic parts. V-AMNs and Y-ANs
(AANs) are shown in Figures 9 and 10. If Δ-ANs are used, then they shall be placed on the
floor in the same or similar way as the V-AMNs (see Figure 26).
Replace, in the first sentence of the sixth paragraph the phrase "power mains leads", by the
new phrase "power leads."
Figure 9 – Test configuration: table-top equipment for conducted disturbance
measurements on power mains
Replace the existing title of this figure by the following new title:
Figure 9 – Test configuration: table-top EUT for conducted disturbance measurements
on LV AC mains power ports and on analogue/digital data ports
Add, below the existing Figure 11, the new Figure 26 as follows:

© IEC 2017
Resistive load
AMN
(optional)
EUT
Transformer (optional)
Change in electrical system
EMI-filter
Laboratory
AC power source
0,8 m
0,8 m
0,8 m
Output
Input
Δ-AN
DC cable
Input Output
AC mains
EMI-filter
(grid)
DC power supply
IEC
NOTE The Δ-AN is a 150 Ω Δ-AN as defined in CISPR 16-1-2.
Figure 26 – Test configuration: table-top EUT for conducted disturbance
measurements on the LV AC mains and LV DC power port of a GCPC
7.4.2 Procedure for the measurement of unsymmetric disturbance voltages with
V-networks (AMNs)
Replace the existing title by the new title:
7.4.2 Procedure for the measurement of disturbance voltages with ANs
7.4.2.1 General
Replace the existing text of this subclause by the following new text:
Generally, the measurement of disturbance voltages using ANs is the preferred CISPR
measurement method. Only if, e.g. an AMN or other AN causes the EUT not to work, then
measurements with current probes or voltage probes should be made.
The disturbance voltage at the LV AC or DC power port or any other port of an EUT can be
measured using an AN suitable for the respective port. Disturbance voltages at the LV AC or
DC power port can be measured either using a V-AN or a Δ-AN as appropriate and as further
detailed in the product standard. By default, either type of AN specified in CISPR 16-1-2 for
use with power ports can be specified in product standards.
Using the specific type of AN implies the following:
• where unsymmetric disturbance voltages are measured, compliance with the limits in the
respective product standard is verified if the two (or more) unsymmetric disturbance
voltage levels measured between each individual power terminal and reference ground
meet the specified limits;
– 8 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
• where asymmetric (CM) and symmetric (DM) disturbance voltages are measured,
compliance with the limits in the respective product standard is verified if the measured
disturbance voltage levels of both modes, i.e. for the level of the asymmetric disturbance
voltage as well as for the level of the symmetric disturbance voltage, meet the specified
limits.
In any case, the assessment of the RFI potential of a given power port under test in the
frequency range up to 30 MHz is only completed if measurement results were obtained and
recorded either for the two (or more) composite unsymmetric disturbance components, or for
both the asymmetric and the (one or more) symmetric disturbance components as well.
NOTE Proven by practical experience, it can be stated that the limits for LV AC mains power ports specified in
CISPR product standards can be applied as reference for the assessment of unsymmetric, asymmetric or
symmetric disturbance components, without further adjustment to the actual specific measurand used.
In principle, any type of AN specified in CISPR 16-1-2 can be used for termination of a given
LV AC or DC power port under test with a defined RF load impedance. One should bear in
mind however that application of a certain type of AN with measurements at a specific type of
power port (AC power port or DC power port) may require the use of modified limits in order to
get valid and fully comparable test results. This is due to the different RF load impedances
provided by the different types of available ANs.
In case of doubt, one should therefore rely on the findings of the respective product
committee for use of ANs according to CISPR 16-1-2 in type testing with EUTs of the product
family concerned. This basic standard presently does not cover respective conversion factors.
As a rule, the limits should be adjusted assuming the same permitted disturbance current
level as can be calculated from the CM termination impedance of the type of AN for which the
limits in the respective product standard were originally derived.
Disturbance voltages at an EUT having more than one type of power port, such as one having
a LV AC power port and another LV DC power port, shall be measured with the respective
ports connected to the respective power supply networks (or other appropriate load) via
appropriate ANs.
7.4.2.2 Arrangement of equipment with ground connection
Replace the existing title by the following new title:
7.4.2.2 Set-up of EUTs with ground connection
Replace the existing first three paragraphs by the following new text:
For an EUT that is required to be grounded during its operation, or the conductive housing of
which can come into contact with ground, the unsymmetric disturbance voltage of the
individual LV AC mains or other kind of power lead is measured with reference to the RGP
(general ground of the measuring equipment) to which the housing of the EUT is connected
via its protective ground conductor and the ground connection of the AMN (see the equivalent
circuit in Figure 15). Asymmetric disturbance voltages at all power leads in the respective
cable to the power port under test are also measured with reference to reference ground. The
symmetric disturbance voltage does not have relation to reference ground as it is the
disturbance voltage measured between two individual leads or terminals of the power port
under test not comprising the grounding terminal or PE wire.
The parameters determining the interference potential of grounded EUTs are discussed in
Clause A.3.
For EUTs with two or more power and safety conductors or special ground connections, the
measurement result depends much on the termination conditions of the mains and other
power terminals and the grounding conditions (refer also to 7.5 on measurement in systems).

© IEC 2017
Figure 14 – Schematic of disturbance voltage measurement configuration (see also
7.5.2.3)
Add, between the end of the key and the title, the following new note:
NOTE A similar arrangement is used for defined termination of LV DC power ports under test.
Figure 15 – Equivalent circuit for measurement of unsymmetric disturbance voltage for
safety-class I (grounded) EUT
Add, to the existing item 3 in the key, the phrase "(here, V-AMN)" after the abbreviation
"AMN".
7.4.2.3 Arrangement of equipment without ground connection
Replace the existing title by the following new title:
7.4.2.3 Set-up of EUTs without ground connection
Add, at the end of the existing first paragraph, the following new text:
Devices without ground connection comprise electrical devices with protective insulation
(safety-class II) and devices which can be operated without ground or safety conductor
(device of safety-class III) and also pluggable safety-class I devices connected via an
isolating transformer. For these devices, the unsymmetric disturbance voltage of the
individual conductors shall be measured with respect to the metal reference ground of the
measurement arrangement as shown in the equivalent circuit of Figure 16. Asymmetric and
symmetric disturbance voltages shall be measured with a Δ-AN replacing the V-AN shown at
the right-hand side of Figure 16.
7.4.3.2 Measurement using the delta-type network
Replace the existing title by the following new title:
7.4.3.2 Measurement using the Δ-AN
Replace the existing text of this subclause by the following new text:
The asymmetric (CM) disturbance voltage at the terminals for symmetric (DM) signal lines of
telecommunication, data processing and other equipment is measured with Δ-ANs in
accordance with CISPR 16-1-2, in the frequency range 150 kHz to 30 MHz. The Δ-ANs
specified in CISPR 16-1-2 could be constructed so as to allow signal and DC current paths
needed for the proper functioning of the EUT, as long as the requirements for DM and CM
termination impedances of CISPR 16-1-2 are met.
When using the Δ-AN for measurements on signal terminals, the differential mode rejection
(DMR) or longitudinal conversion loss (LCL) of the Δ-AN shall be as high as needed so as not
to give erroneous results when measuring an asymmetric disturbance voltage at the same
frequency as the operational DM signal.
When the EUT is to be measured on its power supply terminals using a V-AMN, all voltage
measurements shall be carried out with both networks connected simultaneously. The
provisions prescribed in 7.4.1 and 7.4.2 shall be observed.
NOTE The measurement frequency range of the Δ-AN can be extended to 9 kHz using the same network
impedance if decoupling of the connected signal line and coupling to the measuring receiver are designed
accordingly.
– 10 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
7.4.4 Measurements using voltage probes
Replace the existing Subclauses 7.4.4.1, 7.4.4.2 and 7.4.4.3 by the following new Subclauses
7.4.4.1 through 7.4.4.4:
7.4.4.1 General
For measurements of conducted disturbance voltages, voltage probes can be used if the
usual AN cannot be used for various reasons including, but not limited to, constraints in the
rated throughput current.
In case of measurement of unsymmetric disturbance voltages, the probe is to be connected in
succession between each individual line (or terminal) of the respective port under test and the
chosen reference ground. Each individual unsymmetric disturbance voltage shall be
measured.
Compliance with the limits of a given product standard can be shown in verifying that the
limits of the disturbance voltage at the power ports specified in that product standard are met.
In case of measurement of unsymmetric disturbance voltages, compliance with the limits
needs to be demonstrated for each of the measured disturbance voltages.
With a Δ-AN used as voltage probe and with a capacitive voltage probe (CVP, see also 7.4.5),
one can also measure asymmetric disturbance voltages at a pair or more of individual power
or signal leads accommodated in the respective cable. In this case, compliance with the limits
of a given product standard can be shown in verifying that the measured asymmetric
disturbance voltage level meets the specified limits.
7.4.4.2 Voltage probe measurements with AMN
To test devices and systems with several connected or connectable lines, the disturbance
voltage at the line connections that cannot be measured with an appropriate AN, such as a V-
AMN (e.g. for connecting lines between parts of components which are separated from the
mains), as well as at the connecting jacks for antennas, control and load lines, shall be
measured with a voltage probe (see 7.3.3) with a high input impedance (1 500 Ω or more) to
ensure that the lines are not loaded by the probe.
For these cases, however, the primary LV AC mains power input wires shall be isolated and
RF terminated with the AMN. For the remaining lines, also those not to be measured with the
probe, the corresponding conditions of 7.4.1 and the operating conditions laid down for the
individual EUTs in the respective product standards (e.g. CISPR 11 [1] and CISPR 14-1) shall
be observed regarding arrangement and length. The voltage probe is connected to the
measuring receiver via a coaxial cable, the screen of which is connected to the reference
ground and the case of the voltage probe. No connection shall be made directly from this case
to live parts of the EUT.
7.4.4.3 Voltage probe measurements without an AMN
During testing of EUTs that cannot be measured with AMNs or other appropriate ANs, the
disturbance voltage is measured across a defined simulation resistance (e.g. artificial fence
simulation in CISPR 14-1 or under open-circuit conditions with an exactly defined
arrangement and line layout taking into consideration the specifications of 7.4.1). The
disturbance voltage is measured with a high-impedance voltage probe.
7.4.4.4 AMN or other appropriate AN used as a voltage probe
Where the current rating of an EUT exceeds the rating of available AMNs or other appropriate
ANs, the AMN or AN can be used as a voltage probe. The EUT port of the AMN or AN used
during the measurements is connected to each of the power lines of the EUT (i.e. to the AC
single phase or three-phase leads, or to the DC plus and minus leads); see also Figure 27.

© IEC 2017
Prior to connecting an AMN to the laboratory LV AC or DC mains supply or power source, it
shall be safely connected to the local PE.
WARNING: Before disconnecting the PE, the AMN shall be disconnected from the mains
supply. The mains port of the AMN is left open. When the AMN is connected as a voltage
probe, the pins on the AMN power input connector/plug will be energized by the supply
voltage. The pins on the plug shall be made safe with an insulated protective cover or
other means.
In the frequency range of 150 kHz to 30 MHz, the respective LV AC and/or DC power supply
lines of the EUT shall be connected to the laboratory LV AC mains and/or DC power supply
via an inductance of 30 μH to 50 μH (see Figure 27 and Figure A.8, configuration 2). The
inductance may be realized by using a choke, a line of 50 m length, or a transformer. Other
means for decoupling of conducted common mode disturbances caused by the laboratory LV
AC and/or DC power supply from the measurement arrangement such as ferrite cores,
CMADs and CDNs, may also be used. However, the insertion loss of those components in the
frequency range below 30 MHz has not yet been investigated in CISPR/A. In the frequency
range of 9 kHz to 150 kHz, a greater inductance will normally be required for decoupling from
the mains. This guarantees also a reduction of noise from the mains network (see
Clause A.5).
Because measurements are preferable with AMNs and other types of AN in their standard
configuration, the AMN or AN as a voltage probe should only be used for in situ tests and
where practical current limitations are exceeded. The AMN as a voltage probe shall not be
used for testing per a product standard unless it is referred to in the product standard as an
alternative measuring method.
EUT
> 20 kVA
DC input
AC output
AMN
The AMN is used as
Terminal box
a voltage probe
'y' m
Isolation
0,8 m
transformer
Isolation mat
0,8 m
0,1 m
CM inductance,
coiled cable, etc.
Current
probe
Input
Output
DC cable
AC mains Δ-AN
(grid)
The Δ-AN is used as
AC mains
Terminal box
a voltage probe
(grid)
Isolation
(optional)
transformer DC power supply
(optional)
IEC
Figure 27 – Typical arrangement for measurement of conducted disturbances
at LV AC mains and DC power ports of floor standing equipment with
an AMN and a Δ-AN used as voltage probes, and with a current probe
7.5.1 General approach to system measurements
Replace all existing text of this subclause by the following new text:

– 12 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
The general objective of defining a system test configuration for conducted disturbance
measurements has the following key points:
– avoiding CM disturbance ground loops;
– defining a configuration that is easily duplicated;
– decoupling lines not being measured from the line being measured;
– placing of lines to achieve decoupling;
– arranging lines to minimize the influence of magnetic fields on disturbance measurements;
– duplicating requirements in 7.1 to 7.4 for the system test to the maximum extent possible.
Whenever possible, the disturbance voltage on a system line shall be measured with an AN.
For currents up to 200 A, AMNs can be used quite easily. The AN shall be installed within
80 cm of the system equipment being measured, where practical. Each wire of a multi-wire LV
AC power mains or other power supply circuit shall be routed through an AMN or another
suitable AN. Each AN shall be terminated with a 50 Ω resistor at the receiver port.
Further guidelines for connection of electrical equipment to the AMN are found in Annex A.
These guidelines apply also for connection of the equipment to other types of AN used for
termination of power lines.
The EUT shall be arranged and connected with cables terminated in accordance with the
manufacturer's instructions.
For some measurements, relevant product publications may state a specific load to be used
together with load voltage probes, instead of an AMN or other type of AN. A voltage probe
may also be used for conducted measurements, when the AC mains or other power supply
current is above 200 A and an appropriate AMN or other type of AN is not available. However,
in this latter case, test results with an AMN or AN shall be preferred.
For some measurements, the use of current probes may be specified in the relevant product
publication.
7.5.2.4 Mains connection
Replace the existing title by the following new title:
7.5.2.4 Connection to the LV AC mains power supply
Add, after the existing 7.5.2.4, the following new 7.5.2.5:
7.5.2.5 Additional connection to a LV DC power supply
If the system under test is also to be provided with LV DC power during the measurements,
then connection to the laboratory LV DC power supply shall be made such as not to corrupt
the connecting conditions provided by adherence to the advice in 7.5.2.4. In particular, CM
current loops about the RGP used during the measurements shall be avoided.
For measurements on grid connected transformerless power electronic devices, only DC
power sources with protective insulation (safety-class II) should be used. If such a laboratory
DC power supply (as e.g. a set of batteries) is not available, then the necessary LV AC mains
power per 7.5.2.4 may be provided via an extra isolation transformer; see also Figure 27.
7.5.3 Measurements of interconnecting lines
Replace the existing second paragraph by the following new paragraph:

© IEC 2017
During the measurement, the ANs on the mains and/or other power supply leads remain in
place, to provide a defined isolation to the AC mains and other power sources, and a defined
RF termination. The auxiliary apparatus (control, actual or artificial load, etc.) is connected to
allow measurements to be made under all provided operating conditions and during
interactions between components of the equipment. Measurements are made on the specified
terminals of each piece of equipment.
___________
– 14 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
AVANT-PROPOS
Le présent amendement a été établi par le sous-comité CISPR A: Mesures des perturbations
radioélectriques et méthodes statistiques, du comité d'études CISPR de l'IEC: Comité
international spécial des perturbations radioélectriques.
Le texte de cet amendement est issu des documents suivants:
CDV Rapport de vote
CISPR/A/1168/CDV CISPR/A/1201/RVC

Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cet amendement.
Le comité a décidé que le contenu de cet amendement et de la publication de base ne sera
pas modifié avant la date de stabilité indiquée sur le site web de l'IEC sous
"http://webstore.iec.ch" dans les données relatives à la publication recherchée. A cette date,
la publication sera
• reconduite,
• supprimée,
• remplacée par une édition révisée, ou
• amendée.
IMPORTANT – Le logo "colour inside" qui se trouve sur la page de couverture de cette
publication indique qu'elle contient des couleurs qui sont considérées comme utiles à
une bonne compréhension de son contenu. Les utilisateurs devraient, par conséquent,
imprimer cette publication en utilisant une imprimante couleur.

_____________
1 Domaine d'application
Remplacer le premier alinéa par le nouvel alinéa suivant:
La présente partie de la CISPR 16 est une norme de base qui spécifie les méthodes de
mesure des phénomènes de perturbation dans la plage de fréquences de 9 kHz à 18 GHz,
d'une manière générale, et plus spécifiquement des phénomènes de perturbation conduite
dans la plage de fréquences de 9 kHz à 30 MHz. Le CDNE étend la plage de fréquences des
mesures des perturbations conduites jusqu'à 300 MHz.
3.1 Termes et définitions
3.1.2
réseau fictif
AN
Remplacer la définition et la note existantes par la nouvelle définition et la nouvelle note
suivantes:
© IEC 2017
réseau permettant d'envoyer une impédance RF définie à l'EUT, de délivrer la tension
perturbatrice au récepteur de mesure et de découpler le circuit d'essai du secteur ou de toute
ligne électrique, ou bien des lignes de signaux équipées de matériel associé
Note 1 à l'article: Il existe quatre principaux types de réseaux fictifs: le réseau en V (AN en V) qui délivre les
tensions dissymétriques, le réseau en delta (AN en Δ) qui délivre les tensions symétriques (en mode différentiel) et
asymétriques (en mode commun) séparément, le réseau en Y (AN en Y) et le réseau coaxial (câble blindé) qui
couplent les tensions asymétriques (en mode commun).
3.1.3
réseau fictif d'alimentation
AMN
Remplacer la Note 1 à l'article existante par la nouvelle note suivante:
Note 1 à l'article: Il existe deux principaux types de réseaux fictifs: le réseau en V (AMN en V), qui délivre les
tensions dissymétriques, et le réseau en delta (AMN en Δ), qui délivre les tensions symétriques (en mode
différentiel) et asymétriques (en mode commun) séparément.
3.1.6
tension asymétrique
Remplacer la définition et la note existantes par la nouvelle définition et la nouvelle note
suivantes:
tension RF qui apparaît entre le point milieu électrique de chaque borne ou sortie et la terre
dans un circuit à deux ou plusieurs fils, parfois appelée tension en mode commun
Note 1 à l'article: Dans le cas d'un accès d'alimentation secteur en courant alternatif basse tension, si V désigne
a
la tension vectorielle entre l'une des bornes d'alimentation et la terre de référence, et si V désigne la tension
b
vectorielle entre l'autre borne d'alimentation et la terre de référence, alors la tension asymétrique correspond à la
moitié de la somme vectorielle de V et de V , soit (V + V )/2.
a b a b
3.1.7
tension symétrique
Remplacer la définition et la note existantes par la nouvelle définition et la nouvelle note
suivantes:
tension RF qui apparaît entre toute paire de fils, hors fil au potentiel de la terre, dans un
circuit à deux ou plusieurs fils, par exemple une alimentation secteur monophasée ou un
faisceau de paires torsadées à l'intérieur d'un câble de communication, parfois appelée
tension différentielle ou tension en mode différentiel
Note 1 à l'article: Dans le cas d'un accès d'alimentation secteur en courant alternatif basse tension, la tensi
...