IEC 60974-10:2020

IEC 60974-10 ®
Edition 4.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 10: Electromagnetic compatibility (EMC) requirements

Matériel de soudage à l’arc –
Partie 10: Exigences de compatibilité électromagnétique (CEM)

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IEC 60974-10 ®
Edition 4.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 10: Electromagnetic compatibility (EMC) requirements

Matériel de soudage à l’arc –
Partie 10: Exigences de compatibilité électromagnétique (CEM)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.160.30 ISBN 978-2-8322-8027-0

– 2 – IEC 60974-10:2020 © IEC 2020
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 General test requirements . 11
4.1 Test conditions . 11
4.2 Measuring instruments . 11
4.3 Artificial mains network . 12
4.4 Voltage probe . 12
4.5 Antennas . 12
4.6 Coupling/decoupling network (CDN). 12
5 Test set-up for emission and immunity . 12
5.1 General . 12
5.2 Load . 15
5.3 Ancillary equipment . 16
5.3.1 General requirements . 16
5.3.2 Wire feeders . 16
5.3.3 Remote controls . 16
5.3.4 Arc striking and stabilizing devices . 16
5.3.5 Liquid cooling systems . 17
6 Emission tests . 17
6.1 Classification for RF emission tests . 17
6.1.1 Class A equipment . 17
6.1.2 Class B equipment . 17
6.2 Test conditions . 17
6.2.1 Welding power source . 17
6.2.2 Load voltages . 18
6.2.3 Wire feeders . 19
6.2.4 Ancillary equipment . 19
6.3 Emission limits . 19
6.3.1 General . 19
6.3.2 Mains terminal disturbance voltage . 19
6.3.3 Conducted emissions at signal, control and measurement ports . 21
6.3.4 Output current ripple . 21
6.3.5 Electromagnetic radiation disturbance . 22
6.3.6 Harmonics, voltage fluctuations and flicker . 23
7 Immunity tests . 25
7.1 Classification for immunity tests . 25
7.1.1 Applicability of tests . 25
7.1.2 Category 1 equipment. 25
7.1.3 Category 2 equipment. 25
7.2 Test conditions . 25
7.3 Immunity performance criteria . 25
7.3.1 Performance criterion A . 25
7.3.2 Performance criterion B . 26
7.3.3 Performance criterion C . 26

7.4 Immunity levels . 26
8 Documentation for the purchaser/user . 28
Annex A (informative) Installation and use . 30
A.1 General . 30
A.2 Assessment of area . 30
A.3 Assessment of welding installation . 30
A.4 Mitigation measures . 31
A.4.1 Public supply system . 31
A.4.2 Maintenance of the arc welding equipment . 31
A.4.3 Welding cables . 31
A.4.4 Equipotential bonding . 31
A.4.5 Earthing of the workpiece . 31
A.4.6 Screening and shielding . 31
Annex B (informative) Limits . 32
B.1 General . 32
B.2 Conducted disturbance voltage limits . 32
B.3 Output current ripple limit . 32
B.4 Radiated disturbance limits . 32
B.5 Output current ripple limits . 32
Annex C (informative) Symbols . 33
Annex D (normative) Battery powered equipment . 34
D.1 General . 34
D.2 Additional emission requirements . 34
D.3 Additional immunity requirements . 34
Annex E (normative) Equipment containing radio devices . 35
E.1 General . 35
E.2 Additional emission requirements . 35
E.3 Additional immunity requirements . 35
Bibliography . 36

Figure 1 – Examples of ports . 10
Figure 2 – Test set-up 1 for arc welding equipment . 13
Figure 3 – Test set-up 2 for portable arc welding equipment . 14
Figure 4 – Top view of test set-up as shown in Figure 2 . 15
Figure 5 – Overview of harmonic requirements for supply current I up to 75 A . 24
1max
Figure 6 – Overview of flicker requirements . 24

Table 1 – Mains terminal disturbance voltage limits, idle state . 20
Table 2 – Mains terminal disturbance voltage limits, load conditions . 21
Table 3 – Output current ripple limits for Class B arc welding power sources . 22
Table 4 – Electromagnetic radiation disturbance – Idle state . 22
Table 5 – Electromagnetic radiation disturbance – Loaded state . 23
Table 6 – Immunity levels – Enclosure . 26
Table 7 – Immunity levels – AC input power port . 27
Table 8 – Immunity levels – Ports for process, signalling, measurement and control . 28

– 4 – IEC 60974-10:2020 © IEC 2020
Table C.1 – Symbols to describe EMC properties . 33

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARC WELDING EQUIPMENT –
Part 10: Electromagnetic compatibility (EMC) requirements

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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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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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 60974-10 has been prepared by IEC technical committee 26:
Electric welding.
This fourth edition cancels and replaces the third edition published in 2014 and its
Amendment 1:2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) updated normative references;
b) requirements for battery powered equipment;
c) requirements for equipment combined with radio transmitters/receivers.

– 6 – IEC 60974-10:2020 © IEC 2020
The text of this standard is based on the following documents:
FDIS Report on voting
26/695/FDIS 26/697/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 60974 series, published under the general title Arc welding
equipment, can be found on the IEC web site.
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.
ARC WELDING EQUIPMENT –
Part 10: Electromagnetic compatibility (EMC) requirements

1 Scope
This part of IEC 60974 is applicable to equipment for arc welding and allied processes,
including power sources and ancillary equipment, for example wire feeders, liquid cooling
systems, arc striking and stabilizing devices and chargers for battery powered equipment.
NOTE 1 Allied processes are, for example, plasma cutting and arc stud welding.
NOTE 2 This document does not specify basic safety requirements for arc welding equipment such as protection
against electric shock, unsafe operation, insulation coordination and related dielectric tests.
Arc welding equipment containing a radio receiver or transmitter is within the scope of this
document.
The radiated emission requirements in this document are not intended to be applicable to the
intentional transmissions from a radio transmitter as defined by the ITU nor to any spurious
emissions related to these intentional transmitters.
This document specifies
a) applicable standards and test methods for radio-frequency (RF) emissions;
b) applicable standards and test methods for harmonic current emission, voltage fluctuations
and flicker;
c) immunity requirements and test methods for continuous and transient, conducted and
radiated disturbances including electrostatic discharges;
d) additional requirements for equipment powered by internal or external batteries
(Annex D);
e) additional requirements for equipment containing radio frequency transmitters/receivers
(Annex E).
Arc welding equipment type tested in accordance with, and which has met the requirements
set in, this document is considered to be in compliance for all applications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60974-1:2017, Arc welding equipment – Part 1: Welding power sources
IEC 60974-1:2017/AMD1:2019
IEC 60974-6:2015, Arc welding equipment – Part 6: Limited duty equipment
IEC 61000-3-2:2018, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current ≤ 16 A per phase)

– 8 – IEC 60974-10:2020 © IEC 2020
IEC 61000-3-3:2013, Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for
equipment with rated current ≤ 16 A per phase and not subject to conditional connection
IEC 61000-3-3:2013/AMD1:2017
IEC 61000-3-11:2017, Electromagnetic compatibility (EMC) – Part 3-11: Limits – Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems –
Equipment with rated current ≤ 75 A and subject to conditional connection
IEC 61000-3-12:2011, Electromagnetic compatibility (EMC) – Part 3-12: Limits for harmonic
currents produced by equipment connected to public low-voltage systems with input current >
16 A and ≤ 75 A per phase
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-3:2006/AMD1:2007
IEC 61000-4-3:2006/AMD2:2010
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-5:2014/AMD1:2017
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-11:2004, Electromagnetic compatibility (EMC) – Part 4-11: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity
tests
IEC 61000-4-11:2004/AMD1:2017
IEC 61000-4-34:2005, Electromagnetic compatibility (EMC) – Part 4-34: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity
tests for equipment with input current more than 16 A per phase
IEC 61000-4-34:2005/AMD1:2009
IEC 61000-6-1:2016, Electromagnetic compatibility (EMC) – Part 6-1: Generic standards –
Immunity standard for residential, commercial and light-industrial environments
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity standard for industrial environments
IEC 61000-6-3:2006, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards –
Emission standard for residential, commercial and light-industrial environments
IEC 61000-6-3:2006/AMD1:2010
IEC 61000-6-4:2018, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards –
Emission standard for industrial environments

CISPR 11:2015, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
CISPR 11:2015/AMD1:2016
CISPR 11:2015/AMD2:2019
CISPR 14-1:2016, Electromagnetic compatibility – Requirements for household appliances,
electric tools and similar apparatus – Part 1: Emission
CISPR 16-1-1:2019, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring
apparatus
CISPR 16-1-2:2014, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-2: Radio disturbance and immunity measuring apparatus – Coupling
devices for conducted disturbance measurements
CISPR 16-1-2:2014/AMD1:2017
CISPR 16-1-4:2019, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-4: Radio disturbance and immunity measuring apparatus – Antennas
and test sites for radiated disturbance measurements
3 Terms and definitions
For the purposes of this document, terms and definitions in IEC 60974-1 as well as the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
click
disturbance which exceeds the limit of continuous disturbance no longer than 200 ms and
which is separated from a subsequent disturbance by at least 200 ms
Note 1 to entry: Both intervals are related to the level of the limit of continuous disturbance.
Note 2 to entry: A click may contain a number of impulses, in which case the relevant time is that from the
beginning of the first to the end of the last impulse.
[SOURCE: IEC 60050-851:2008, 851-15-13]
3.2
coupling network
electrical circuit for transferring energy from one circuit to another with a defined impedance
Note 1 to entry: Coupling and decoupling devices can be integrated into one box (coupling and decoupling
network (CDN)) or they can be in separate networks.
[SOURCE:IEC 61000-4-6:2013, 3.7]
3.3
CDN
coupling/decoupling network
electrical circuit incorporating the functions of both the coupling and decoupling networks
[SOURCE:IEC 61000-4-6:2013, 3.8]

– 10 – IEC 60974-10:2020 © IEC 2020
3.4
decoupling network
decoupling device
electrical circuit for preventing test signals applied to the equipment under test (EUT) from
affecting other devices,equipment or systems that are not under test
[SOURCE:IEC 61000-4-6:2013, 3.9]
3.5
FAR
fully-anechoic room
shielded enclosure, the internal surfaces of which are lined with radio-frequency-energy
absorbing material (i.e. RF absorber) that absorbs electromagnetic energy in the frequency
range of interest
[SOURCE: CISPR 11:2015/AMD1:2016, 3.20]
3.6
OATS
open-area test site
facility used for measurements of electromagnetic fields the intention for which is to simulate
a semi-free-space environment over a specified frequency range that is used for radiated
emission testing of products
Note 1 to entry: An OATS typically is located outdoors in an open area, and has an electrically-conducting ground
plane.
[SOURCE: CISPR 11:2015/AMD1:2016, 3.21]
3.7
port
particular interface of an equipment which couples this equipment with the external
electromagnetic environment (IEC 60050-161:2018, 161-01-01) and through which the
equipment is influenced by this environment
EXAMPLE Examples of ports of interest are shown in Figure 1. The enclosure port is the physical boundary of the
apparatus (e.g. enclosure). The enclosure port provides for radiated and electrostatic discharge
(IEC 60050-161:2018, 161-01-22) energy transfer, whereas the other ports provide for conducted energy transfer.

Figure 1 – Examples of ports
Note 1 to entry: Ports in the subject area of electromagnetic compatibility are specific cases of the port defined in
IEC 60050-131:2002, 131-12-60.
[SOURCE: IEC Guide 107:2014, 3.1.12, modified – The presentation of the term and the
wording of the definition have been revised for compatibility with IEC 60050 (all parts).]
3.8
portable, adj
capable to be carried by one person
Note 1 to entry: Portability is typically specified by the equipment manufacturer based on the intended use, the
equipment design and/or local regulation.

[SOURCE: IEC 60050-151:2001, 151-16-47, modified – The note to entry has been entirely
redrafted.]
3.9
SAC
semi-anechoic chamber
shielded enclosure, in which five of the six internal surfaces are lined with radio-frequency
energy absorbing material (i.e. RF absorber) that absorbs electromagnetic energy in the
frequency range of interest, and the bottom horizontal surface is a conducting ground plane
for use with OATS test set-ups
[SOURCE: CISPR 11:2015/AMD1:2016, 3.22]
3.10
small equipment
equipment, either positioned on a table top or standing on the floor which, including its cables
fits in an imaginary cylindrical test volume of 1,2 m in diameter and 1,5 m height (to ground
plane)
[SOURCE: CISPR 11:2015, 3.17, modified – Replacement of the term "small size equipment"
by "small equipment".]
3.11
wired network port
PORT for the connection of voice, data and signalling transfers intended to interconnect
widely-dispersed systems by direct connection to a single-user or multi-user communication
network
Note 1 to entry: Examples of these include CATV, PSTN, ISDN, xDSL, LAN and similar networks.
Note 2 to entry: These PORTS may support screened or unscreened cables and may also carry AC or DC power
where this is an integral part of the telecommunication specification.
[SOURCE: CISPR 32:2015, 3.1.32]
4 General test requirements
4.1 Test conditions
Tests shall be carried out on completely assembled equipment representative of the series
production. Tests shall be performed within the specified operating conditions given in
IEC 60974-1:2017 and IEC 60974-1:2017/AMD1:2019 or IEC 60974-6:2015, and at the rated
supply voltage and frequency. Results obtained for RF emission and immunity at 50 Hz are
valid for the same model operating at 60 Hz and vice versa.
Where this document gives options for testing particular requirements with a choice of test
methods, compliance can be shown against any of the test methods, using the specified limits
with the restrictions provided in the relevant tables.
Identical units may be used for testing in parallel. In this case, this information shall be
recorded in the test report.
4.2 Measuring instruments
The measuring equipment shall comply with the requirements of CISPR 16-1-1:2019 and the
standards referred to in Table 6, Table 7 and Table 8 as applicable.

– 12 – IEC 60974-10:2020 © IEC 2020
4.3 Artificial mains network
Measurement of the mains terminal disturbance voltage shall be made using an artificial
mains network, if commercially available, consisting of 50 Ω/50 µH or 50 Ω/50 µH + 5 Ω V-
network as specified in CISPR 16-1-2:2014 and CISPR 16-1-2:2014/AMD1:2017.
The artificial network is required to provide a defined impedance at RF across the mains
supply at the point of measurement and also to provide for isolation of the equipment under
test from ambient noise on the power lines.
4.4 Voltage probe
A voltage probe as specified in CISPR 16-1-2:2014 and CISPR 16-1-2:2014/AMD1:2017 shall
be used when the artificial mains network cannot be used. The probe is connected
sequentially between each line and the reference earth. The probe shall consist of a blocking
capacitor and a resistor such that the total resistance between the line and earth is at least
1 500 Ω. The effect on the accuracy of measurement of the capacitor or any other device
which may be used to protect the measuring receiver against dangerous currents shall be
either less than 1 dB or allowed for in calibration.
4.5 Antennas
In the frequency range from 30 MHz to 6 GHz, the antenna(s) used shall be as specified in
CISPR 16-1-4:2019.
Measurements shall be made for both horizontal and vertical polarization.
On an OATS or in a SAC, the nearest point of the antenna(s) to the ground shall be not less
than 0,25 m.
For measurements in a FAR, the antenna height is fixed at the geometrical middle height of
the validated test volume.
4.6 Coupling/decoupling network (CDN)
If a shielded chamber is required and the load is situated outside the shielded chamber, a
load-decoupling network connected to the outside load via suitable RF filters shall be used
inside the chamber. A 150 Ω CDN AF 2, as specified in IEC 61000-4-6:2013, suitable for the
respective load current and voltage, shall be used. The RF-port of the CDN shall be
terminated with 50 Ω.
Any suitable coupling devices specified in CISPR 16-1-2:2014 and CISPR 16-
1-2:2014/AMD1:2017 may be used for the conducted emission assessment of signal, control
or measurement ports.
5 Test set-up for emission and immunity
5.1 General
Emission and immunity testing of equipment that is not PORTABLE shall be carried out on
equipment configured in accordance with Figure 2. For PORTABLE equipment, either the test
set-up given in Figure 2 or the test set-up given in Figure 3 shall be used. Arc welding
equipment tested in one of these configurations shall be considered to have met the
necessary requirements of this document.
For the measurement of the output current ripple, there are no specific requirements for the
equipment configuration.
For RF emission, EM field immunity, common mode immunity, and fast transient immunity
tests the following dimensions apply:
• in Figure 2, a shall be 1 m;
• in Figure 2 and Figure 3, b shall be 0,4 m or less;
• in Figure 3, h shall be 0,8 m;
• In Figure 3, the horizontal distance c between the EUT and the convential load shall be 1
m or less.
Dimensions a, b and h are undefined for all other tests.
The tolerance for the dimensions a and h is ± 0,05 m.

Key
1 Welding power source 7 Welding cable (bundled)
2 Liquid cooling system 8 Input supply cable (bundled)
3 Wire feeder 9 Insulation
4 Remote control 10 Reference ground plane
5 Interconnection cable (bundled)
11 Conventional load
6 Remote control cable (bundled)

a Distance between power source and load or load decoupling network
b Cable bundle length
NOTE 1 Items 2, 3, and 4 are ancillary equipment, as applicable, and are typically positioned as specified
by the equipment manufacturer.
NOTE 2 Insulation (item 9) is placed between items 1 and 3 if specified by the manufacturer.

Figure 2 – Test set-up 1 for arc welding equipment
If, due to the design of the arc welding equipment, these tests cannot be carried out as
described, the manufacturer’s recommendations (for example, temporary bypassing or
disablement of control circuits) should be followed in order to match these test objectives. Any
temporary changes to the arc welding equipment shall be documented.

– 14 – IEC 60974-10:2020 © IEC 2020
If ancillary equipment can be connected to the welding power source, then the welding power
source shall be tested with the minimum configuration of ancillary equipment necessary to
exercise the ports. If the welding power source has a large number of similar PORTS or PORTS
with many similar connections, then a sufficient number shall be selected to simulate actual
operating conditions and to ensure that all the different types of termination are covered.
For mains terminal voltage disturbance tests the welding power source shall be connected to
the electricity supply using the V-network specified in 4.3 whenever possible. The V-network
shall be located so that its closest surface is no less than 0,8 m from the nearest boundary of
the equipment under test. The input cable shall have a minimum length of 2 m.

Key
1 Arc welding equipment 6 Insulation
2 Remote control (under the table) 7 Reference ground plane
3 Welding cable (bundled) 8 Non-conductive table
Conventional load; The load may be placed
4 Remote control cable (bundled) 9
under or beside the table (under the table)
5 Input supply cable (bundled)

b Cable bundle length
h Non-conductive table height
NOTE Item 2 is ancillary equipment, as applicable.

Figure 3 – Test set-up 2 for portable arc welding equipment

Key
1 Arc welding equipment 3 Test antenna (horizontal polarization shown)
2 Welding cables (bundled) 4 Conventional load or load decoupling network
e Separation distance between the equipment under test and the radiation center of the antenna
i Distance between the equipment under test and nearest point of the antenna

Figure 4 – Top view of test set-up as shown in Figure 2
The welding power source shall be connected to the conventional load by welding cables of
suitable cross-section for the welding current, or the appropriate torch or electrode holder with
an adapter. The welding cables shall have a minimum length of 2 m.
If a load situated outside the shielded chamber is used, a load-decoupling network as defined
in 4.6 shall be placed inside the shielded chamber. The load-decoupling network shall be
terminated to the reference ground and connected to the outside load via suitable filters.
For RF emission tests using the test set-up given in Figure 2, the welding power source shall
be insulated by an insulating mat (or blocks) not greater than 12 mm thick or insulated by its
own under-gear if appropriate.
For electromagnetic radiation disturbance and EM field immunity tests using the test set-up as
given in Figure 2, the welding power source and conventional load (or, if applicable, the load-
decoupling network) shall be at one stationary position with respect to the test antenna as
shown in Figure 4. The separation distance e in Figure 4 is defined in 8.3 of CISPR 11:2015
and CISPR 11:2015/AMD1:2016. The separation distance i in Figure 4 is defined in
IEC 61000-4-3:2006, IEC 61000-4-3:2006/AMD1:2007 and IEC 61000-4-3:2006/AMD2:2010.
The cables shall be allowed to fall naturally to the ground plane. Excess cable length shall be
folded to form separate bundles not exceeding 0,4 m in length, as far as practicable.
Specific test set-up geometries for immunity tests can be found in the basic standards
referenced in Table 6, Table 7 and Table 8.
The configuration of the equipment under test shall be noted in the test report.
5.2 Load
During the tests, the arc welding operation is simulated by loading the equipment with a
conventional load as specified in IEC 60974-1:2017 and IEC 60974-1:2017/AMD1:2019. For
RF emission tests that do not use a CDN, the conventional load shall be insulated by an

– 16 – IEC 60974-10:2020 © IEC 2020
insulating mat (or blocks) not greater than 12 mm thick or insulated by its own under-gear if
appropriate.
For the measurement of the output current ripple, the inductance of the load including welding
cables at the fundamental frequency shall be less than 10 µH per 100 mΩ total resistance.
5.3 Ancillary equipment
5.3.1 General requirements
Ancillary equipment shall be tested in conjunction with a welding power source. It shall be
connected, installed and configured as recommended by the manufacturer.
Specific requirements for the operation of ancillary equipment are given below.
5.3.2 Wire feeders
Wire feeders shall be positioned on or near a welding power source as designed. Wire
feeders, which can be located both inside or outside the welding power source enclosure,
shall be placed outside. For RF emission tests, wire feeders designed to be placed on the
floor shall be insulated from it, by an insulating mat (or blocks) not greater than 12 mm thick
or insulated by its own under-gear, if appropriate.
The welding cable connecting the wire feeder to the welding power source shall be 2 m in
length or longer, if required, to make the connection and be of suitable current rating. If a
welding cable in excess of 2 m is provided by the manufacturer, the excess cable length shall
be folded to form a bundle not exceeding 0,4 m in length, as far as practicable. A welding
cable connection less than 2 m long shall be permitted if this is supplied with the equipment.
The interconnection cable(s) between the wire feeder and the welding power source shall be
of the type and length recommended by the manufacturer. Excess cable length shall be folded
to form a bundle not exceeding 0,4 m in length, as far as practicable.
A welding torch, as recommended by the manufacturer, may be used instead of a welding
cable to make the connection from the wire feeder to the conventional load.
5.3.3 Remote controls
If a welding power source is capable of operating with a remote control, it shall be tested with
the remote control connected, which is expected to give the highest emissions and/or lowest
immunity. The remote control shall be placed on, and i
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