IEC 62135-2:2007
(Main)Resistance welding equipment - Part 2: Electromagnetic compatibility (EMC) requirements
Resistance welding equipment - Part 2: Electromagnetic compatibility (EMC) requirements
Specifies test methods to be used in conjunction with CISPR 11 to determine radiofrequency emission; relevant standards and test methods for harmonic current emission, voltage fluctuation and flicker. Also defines immunity requirements and test methods for continuous and transient, conducted and radiated disturbances including electrostatic discharges.
Matériels de soudage par résistance - Partie 2: Exigences de compatibilité électromagnétique (CEM)
Spécifie les méthodes d'essai à utiliser en conjonction avec la CISPR 11 pour déterminer l'émission radiofréquence; les normes appropriées et les méthodes d'essai pour l'émission de courant harmonique, la fluctuation de tension et papillotement. Définit également les exigences d'immunité et les méthodes d'essai pour les perturbations continues ou transitoires, conduites et rayonnées, y compris les décharges électrostatiques.
General Information
Relations
Standards Content (Sample)
IEC 62135-2
Edition 1.0 2007-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resistance welding equipment –
Part 2: Electromagnetic compatibility (EMC) requirements
Matériels de soudage par résistance –
Partie 2: Exigences de compatibilité électromagnétique (CEM)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.
IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
ƒ Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: csc@iec.ch
Tél.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 62135-2
Edition 1.0 2007-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resistance welding equipment –
Part 2: Electromagnetic compatibility (EMC) requirements
Matériels de soudage par résistance –
Partie 2: Exigences de compatibilité électromagnétique (CEM)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 25.160 ISBN 2-8318-9303-8
– 2 – 62135-2 © IEC:2007
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .8
4 General test requirements .8
4.1 Test conditions.8
4.2 Measuring instruments .8
4.3 Artificial mains network .9
4.4 Voltage probe.9
4.5 Antennas.9
5 Test set-up for emission and immunity.9
5.1 General requirements.9
5.2 Ancillary equipment .10
6 Emission tests .10
6.1 Classification of equipment.10
6.1.1 Class A equipment .10
6.1.2 Class B equipment .10
6.2 Test conditions.10
6.2.1 Test conditions for r.f. tests .10
6.2.2 Test conditions for low-frequency tests.10
6.3 Emission limits .11
6.3.1 Mains terminal disturbance voltage.11
6.3.2 Electromagnetic radiation disturbance .11
6.3.3 Low-frequency emission limits .12
7 Immunity tests .12
7.1 Tests applicability.12
7.2 Test conditions.12
7.3 Immunity performance criteria .12
7.3.1 Performance criteria A.12
7.3.2 Performance criteria B.13
7.3.3 Performance criteria C.13
7.4 Immunity levels .13
8 Documentation for the purchaser/user .13
Annex A (informative) Limits .16
Bibliography.21
Table 1 – Immunity levels – Enclosure .15
Table 2 – Immunity levels – AC input power port.15
Table 3 – Immunity levels – Ports for process measurement and control lines.15
Table A.1 – Mains terminal disturbance voltage limits, idle state.16
Table A.2 – Mains terminal disturbance voltage limits, load conditions.16
Table A.3 – Electromagnetic radiation disturbance limits, idle state .17
62135-2 © IEC:2007 – 3 –
Table A.4 – Electromagnetic radiation disturbance limits, load conditions .17
Table A.5 – Maximum permissible harmonic current for equipment with input current
I ≤ 16 A .18
1cc
Table A.6 – Current emission limits for equipment with 16 A < I ≤ 75 A other than
1cc
balanced three-phase equipment .18
Table A.7 – Current emission limits for balanced three-phase equipment with input
current 16 A < I ≤ 75 A .19
1cc
Table A.8 – Current emission limits for balanced three-phase equipment with input
current 16 A < I ≤ 75 A under specified conditions.19
1cc
Table A.9 – Limits for resistance welding equipment I ≤ 75 A .20
1cc
– 4 – 62135-2 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RESISTANCE WELDING EQUIPMENT –
Part 2: 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,
Technical Reports, and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to
technical committees; any IEC National Committee interested in the subject dealt with may participate in this
preparatory work. International, governmental and non-governmental organizations liaising with the IEC also
participate in this preparation. IEC collaborates closely 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
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 62135-2 has been prepared by IEC technical committee 26:
Electric Welding.
The text of this standard is based on the following documents:
CDV Report on voting
26/342/CDV 26/357/RVC
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.
The list of all the parts of the IEC 62135 series, under the general title Resistance welding
equipment, can be found on the IEC website.
62135-2 © IEC:2007 – 5 –
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
– 6 – 62135-2 © IEC:2007
RESISTANCE WELDING EQUIPMENT –
Part 2: Electromagnetic compatibility (EMC) requirements
1 Scope
This part of IEC 62135 is applicable to equipment for resistance welding and allied processes
which are connected to mains supplies with rated voltages up to 1 000 V a.c. r.m.s. This
standard does not define safety requirements.
Resistance welding equipment type tested in accordance with, and which has met the
requirements of, this standard, shall be deemed to be in compliance for all applications.
The frequency range covered is from 0 Hz to 400 GHz.
This product EMC standard for resistance welding equipment takes precedence over all
aspects of the generic standards and no additional EMC tests are required or necessary.
NOTE 1 Typical allied processes are resistance hard and soft soldering or resistance heating achieved by means
comparable to resistance welding equipment.
NOTE 2 Limit values are specified for only part of the frequency range.
Resistance welding equipment are classified as Class A and Class B equipment.
This part of IEC 62135 specifies
a) test methods to be used in conjunction with CISPR 11 to determine radiofrequency (r.f.)
emission;
b) relevant standards and test methods for harmonic current emission, voltage fluctuation
and flicker.
NOTE 3 The limits in this standard may not, however, provide full protection against interference to radio and
television reception when the resistance welding equipment is used closer than 30 m to the receiving antenna(e).
NOTE 4 In special cases, when highly susceptible apparatus is being used in close proximity, additional
mitigation measures may have to be employed to further reduce the electromagnetic emissions.
This part of IEC 62135 also defines immunity requirements and test methods for continuous
and transient, conducted and radiated disturbances including electrostatic discharges.
NOTE 5 These requirements do not, however, cover extreme cases which are extremely rare.
2 Normative references
The following referenced documents are indispensable for the application 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 60050-161, International Electrotechnical Vocabulary – Chapter 161: Electromagnetic
compatibility
IEC 60050-851, International Electrotechnical Vocabulary – Chapter 851: Electric welding
IEC 61000-3-2:2005, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current ≤ 16 A per phase)
62135-2 © IEC:2007 – 7 –
IEC 61000-3-3:1994, Electromagnetic compatibility (EMC) – Part 3: Limits – Limitation of
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
Amendment 1 (2001)
Amendment 2 (2005)
IEC 61000-3-11:2000, 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 61000-3-12:2004, 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, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC)– Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
techniques – Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-7, Electromagnetic compatibility (EMC) – Part 4-7: Testing and measurement
techniques; General guide on harmonics and interharmonics measurements and
instrumentation, for power supply systems and equipment connected thereto
IEC 61000-4-11, Electromagnetic compatibility (EMC) – Part 4-11: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations immunity tests
IEC 61000-4-15, Electromagnetic compatibility (EMC) – Part 4-15: Testing and measurement
techniques – Flickermeter - Functional and design specifications
IEC 62135-1, Resistance welding equipment – Part 1: Safety requirements
CISPR 11:2003, Industrial, scientific and medical (ISM) radio-frequency equipment –
Electromagnetic disturbance characteristics – Limits and methods of measurement
CISPR 14-1, Electromagnetic compatiblility – Requirements for household appliances, electric
tools and similar apparatus – Part 1: Emission
CISPR 16-1-1, 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, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-2: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Conducted disturbances
———————
There exists a consolidated edition 1.2 (2005) that includes edition 1 and its amendments 1 and 2.
– 8 – 62135-2 © IEC:2007
CISPR 16-1-4, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-4: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Radiated disturbances
ISO 669, Resistance welding – Resistance welding equipment – Mechanical and electrical
requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. Terms and
definitions relating to EMC may be found in IEC 60050-161 and in CISPR publications. In
addition, the terms and definitions relating to resistance welding equipment may be found in
IEC 60050-851, IEC 62135-1 and ISO 669.
3.1
cable port
point at which a conductor or a cable is connected to the apparatus
NOTE 1 Examples are signal, control and power ports.
NOTE 2 The secondary circuit of resistance welding equipment is not a cable port but is part of the enclosure
port.
3.2
conventional load
load condition with the electrodes short-circuiting as defined in ISO 669:2000
3.3
conventional value
standardized value that is used as a measure of a parameter for the purposes of comparison,
calibration, testing, etc.
NOTE Conventional values do not necessarily apply during the actual welding process.
3.4
enclosure port
physical boundary of the apparatus through which electro-magnetic fields may radiate or
impinge
3.5
idle state
operating mode in which the power is switched on, but the welding circuit is not energized
3.6
port
particular interface of the specified apparatus with the external electro-magnetic environment
4 General test requirements
4.1 Test conditions
Tests shall be carried out within the specified operating conditions for the apparatus at its
rated supply voltage and frequency as given in IEC 62135-1. Results obtained for r.f.
emission and immunity at 50 Hz are valid for the same model operating at 60 Hz and vice
versa.
4.2 Measuring instruments
The measuring equipment shall comply with the requirements of CISPR 16-1-1 and the
standards referred to in Tables 1, 2 and 3 as applicable.
62135-2 © IEC:2007 – 9 –
The measuring equipment for low-frequency emission tests shall be in conformity with the
requirements of IEC 61000-4-7 for harmonics and IEC 61000-4-15 for voltage fluctuation.
4.3 Artificial mains network
Measurement of the mains terminal disturbance voltage shall be made using an artificial
mains network consisting of 50 Ω/50 μH V-network as specified in CISPR 16-1-2.
The artificial network is required to provide a defined impedance at r.f. 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 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 1 GHz the antenna(s) used shall be as specified in
CISPR 16-1-4. Measurements shall be made for both horizontal and vertical polarization. The
nearest point of the antenna(s) to the ground shall be not less than 0,2 m.
5 Test set-up for emission and immunity
5.1 General requirements
Emission and immunity testing shall be carried out on a representative resistance welding
installation as described below. Resistance welding equipment tested in such an installation
shall be considered to have met the necessary requirements of this standard.
If the resistance welding equipment is part of an installation, or can be connected to auxiliary
equipment, then the resistance welding equipment shall be tested whilst connected to the
minimum configuration of auxiliary equipment necessary to exercise the ports. If the
resistance welding equipment 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.
Measurements to determine compliance with the low-frequency emission limits shall be made
in accordance with the test procedures of relevant basic and referenced standards.
Specific test set-up geometries for immunity tests are found in the basic standards referred to
in Tables 1, 2 and 3.
The configuration of the resistance welding equipment under test shall be precisely noted in
the test report.
Class A resistance welding equipment may be measured either on a test site or in situ as
preferred by the manufacturer.
NOTE Due to size, complexity or operating conditions, some resistance welding equipment may have to be
measured in situ in order to show compliance with the radiation disturbance limits specified herein.
Class B resistance welding equipment shall be measured on a test site.
– 10 – 62135-2 © IEC:2007
5.2 Ancillary equipment
Ancillary equipment shall be tested in conjunction with the resistance welding equipment. It
shall be connected and installed as recommended by the manufacturer.
6 Emission tests
6.1 Classification of equipment
6.1.1 Class A equipment
Class A equipment is intended for use in locations other than residential locations where the
electrical power is provided by the public low-voltage supply system.
Class A equipment shall meet Class A limits in accordance with 6.3.
6.1.2 Class B equipment
Class B equipment is suitable for use in all locations, including residential locations where the
electrical power is provided by the public low-voltage supply system.
Class B equipment shall meet Class B limits in accordance with 6.3.
6.2 Test conditions
6.2.1 Test conditions for r.f. tests
Measurements to determine compliance with the emission limits shall be made in accordance
with the test procedures in CISPR 11 and as detailed below, using the test set-up given in
Clause 5.
Resistance welding equipment is extremely diverse in its design and working conditions. It
shall be tested under the following conditions:
a) idle state
b) loaded
– set up the welding circuit to minimize the impedance and to produce the highest flow
of current (i.e., using minimum arms length and gap);
– set up the electrodes in short-circuit condition;
– adjust the current to obtain the highest emission, if means of adjustment is provided;
Example: for thyristor-controlled equipment, an ignition delay angle of 90° electric will give the highest
emission value.
– select a duty cycle and a welding heat time appropriate for the tested resistance
welding equipment and the requirements of the measuring instrumentation.
The test parameters chosen shall be fully documented.
6.2.2 Test conditions for low-frequency tests
Resistance welding equipment is extremely diverse in its design and working conditions. It
shall be tested under the following conditions:
– set up the welding circuit to minimize the impedance and to produce the highest flow
of current;
– set up the electrodes in short-circuit condition;
– adjust the current to obtain the highest emission, if means of adjustment is provided;
62135-2 © IEC:2007 – 11 –
– calculate the equipment duty cycle X at the maximum welding current based on
equation 1 and
()
I
2P
(1)
X =
()I
2 MAX
where
I is the permanent output current;
2P
I is the maximum welding current;
2MAX
– select an observation period and a welding heat time appropriate for the calculated
duty cycle, the tested resistance welding equipment and the requirements of the
measuring instrumentation.
The test parameters chosen shall be fully documented.
6.3 Emission limits
6.3.1 Mains terminal disturbance voltage
6.3.1.1 Idle mode
The mains terminal disturbance voltage limits for Class A resistance welding equipment are
the Group 1 limits given in Table 2a of CISPR 11.
The mains terminal disturbance voltage limits for Class B resistance welding equipment are
the Group 1 limits given in Table 2b of CISPR 11.
The EUT shall meet either both average and quasi-peak limits using the corresponding
detectors or the average limit when using the quasi-peak detector.
6.3.1.2 Loaded
The mains terminal disturbance voltage limits for Class A resistance welding equipment are
the Group 2 limits given in Table 2a of CISPR 11. The applicable limit shall be selected based
on the maximum short circuit input current I value.
1CC
The mains terminal disturbance voltage limits for Class B resistance welding equipment are
the Group 2 limits given in Table 2b of CISPR 11.
The EUT shall meet either both average and quasi-peak limits using the corresponding
detectors or the average limit when using the quasi-peak detector.
For Class A equipment, impulse noise (clicks) which occurs less than 5 times per minute is
not considered.
For Class B equipment, impulse noise (clicks) which occurs less than 0,2 times per minute, a
relaxation of the limits of 44 dB is allowed.
For clicks appearing between 0,2 and 30 times per minute, a relaxation of the limits is allowed
of 20 log (30/N) dB (where N is the number of clicks per minute). Criteria for separated clicks
may be found in CISPR 14-1.
6.3.2 Electromagnetic radiation disturbance
6.3.2.1 General
For radiated emission tests the separation between the antenna and the equipment under test
shall be as specified in Clause 5 of CISPR 11.
– 12 – 62135-2 © IEC:2007
6.3.2.2 Idle mode
The electromagnetic radiation disturbance limits for Class A resistance welding equipment are
the Group 1 limits given in Table 3 of CISPR 11.
The electromagnetic radiation disturbance limits for Class B resistance welding equipment are
the Group 1 limits given in Table 3 of CISPR 11.
6.3.2.3 Loaded
The electromagnetic radiation disturbance limits for Class A resistance welding equipment in
the frequency band 30 MHz to 1 000 MHz are the limits given in Table 5a of CISPR 11.
The electromagnetic radiation disturbance limits for Class B resistance welding equipment in
the frequency band 30 MHz to 1 000 MHz are the Group 2 limits given in Table 4 of
CISPR 11.
6.3.3 Low-frequency emission limits
The limits for
a) harmonic current emissions are given in IEC 61000-3-2 and IEC 61000-3-12;
b) voltage fluctuations and flicker are given in IEC 61000-3-3 and IEC 61000-3-11;
and are applicable to resistance welding equipment, as far as covered by the scope of these
standards. The applicable standard shall be selected based on the maximum short-circuit
input current I value.
1cc
NOTE For other equipment, no requirements at manufacturing stage are specified. Connection conditions may
apply depending on local power supply conditions. It is recommended to consider IEC/TS 61000-3-4,
IEC/TR 61000-3-6 and IEC/TR 61000-3-7.
7 Immunity tests
7.1 Tests applicability
Resistance welding equipment that does not contain electronic control circuitry is deemed to
fulfil the necessary immunity requirements without testing.
The tests for immunity levels for enclosure, a.c. input power port and ports for process
measurement and control lines are defined in Tables 1, 2 and 3.
7.2 Test conditions
The resistance welding equipment shall be tested, using the set-up as given in Clause 5. The
resistance welding equipment shall be set up with a resistance of 1 kΩ between the
electrodes. The secondary voltage shall be monitored to evaluate the compliance with
performance criteria at an ignition delay angle of 90° electric if means of adjustment is
provided and the point with the duty cycle and the welding heat time typical of the resistance
welding equipment on test or with a continuously flowing secondary current.
Tests that cannot be performed on the complete resistance welding equipment can be
performed on its electronic constituent parts.
7.3 Immunity performance criteria
7.3.1 Performance criteria A
a) The resistance welding equipment shall continue to operate as intended.
62135-2 © IEC:2007 – 13 –
b) Variations of ± 10 % of the secondary voltage are admissible.
c) The pre-set heat time shall not be exceeded.
d) No interruptions are permitted in the heat time.
e) In the "single" operating mode, interruption of the welding cycle shall be properly
terminated.
f) In the "repeat", "seam" and "continuous" operating modes, interruption of the cycle by
releasing the start switch provided must be possible.
g) All controls shall continue to function.
h) Malfunctioning of the semiconductor power switches is inadmissible.
i) Loss of stored data is inadmissible.
7.3.2 Performance criteria B
+50
a) Variations of % of the secondary voltage are admissible.
−100
b) In the case of a current interruption during the intended heat time, the welding cycle is
terminated with "no current". Manual reset may be required.
c) The pre-set heat time shall not be exceeded.
d) In the "single" operation mode, the welding cycle shall be properly terminated.
e) In the "repeat", "seam" and "continuous" operating modes, interruption of the cycle by
releasing the start switch provided must be possible.
f) Malfunctioning of the semiconductor power switches is inadmissible.
g) Loss of stored data is inadmissible.
7.3.3 Performance criteria C
a) Temporary loss of function is allowed, provided that the loss of function is self-
recoverable or can be restored by the operator of the controls. This may require the
control voltage of the resistance welding equipment to be restored by means of an
appropriate switch.
b) Malfunctioning of the semiconductor power switches is inadmissible; temporary loss of
function is allowed.
c) Loss of stored programme data is inadmissible, unless it can be restored by the operation
of the controls.
7.4 Immunity levels
Immunity levels are given in Table 1 for the enclosure, Table 2 for the a.c. input power port
and Table 3 for ports for process, measurement and control lines.
8 Documentation for the purchaser/user
The documentation made available to the purchaser/user prior and after the purchase shall
clearly indicate the equipment class.
The user shall be made aware of the fact that proper installation and use of the resistance
welding equipment is necessary to minimize possible interfering emissions. The manufacturer
or his authorized representative shall be responsible for including instructions and information
with each equipment as follows:
a) for Class B equipment, a written statement that Class B equipment complies with
electromagnetic compatibility requirements in industrial and residential environments,
– 14 – 62135-2 © IEC:2007
including residential locations where the electrical power is provided by the public low-
voltage supply system;
b) for Class A equipment, the following wording or its equivalent shall be included in the
instruction manual:
WARNING: This Class A equipment is not intended for use in residential locations where
the electrical power is provided by the public low-voltage supply system. There may be
potential difficulties in ensuring electromagnetic compatibility in those locations, due to
conducted as well as radiated disturbances.
c) if the equipment with an input current below 75 A per phase is intended to be connected
only to private low-voltage systems and does not comply with IEC 61000-3-12, the
following wording or its equivalent shall be included in the instruction manual:
WARNING: This equipment does not comply with IEC 61000-3-12. If it is connected to a
public low-voltage system, it is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if necessary, that the
equipment may be connected.
d) information on any special measures that have to be taken to achieve compliance, for
example, the use of shielded cables;
e) recommendations on the assessment of the surrounding area, to identify necessary
precautions required for the installation and use, to minimize disturbances;
f) recommendations on methods to minimize disturbances;
g) a statement drawing attention to the user’s responsibility with respect to interference from
welding.
62135-2 © IEC:2007 – 15 –
Table 1 – Immunity levels – Enclosure
Test Performance
Phenomena Units Basic standard Remarks
specification criteria
MHz 80 to 1 000
The test level
Radiofrequency EM field, V/m (unmod. 10
IEC 61000-4-3 specified is prior to A
amplitude modulated r.m.s.)
modulation
% AM (1 kHz) 80
Contact kV (charge
a
B
±4 See basic standard
discharge voltage)
Electrostatic for applicability of
IEC 61000-4-2
contact and/or air
discharge
Air kV (charge
a
discharge test.
B
±8
discharge voltage)
a
Testing is not required at lower levels than those specified.
Table 2 – Immunity levels – AC input power port
Test Performance
Phenomena Units Basic standard Remarks
specification criteria
kV (peak) ±2
Fast transients Repetition frequency kHz 5 IEC 61000-4-4 Direct injection B
Tr/Th ns 5/50
See note
Radio-
MHz 0,15 to 80
The test level
frequency IEC 61000-4-6 A
V (unmod. r.m.s.) 10
specified is prior to
common mode
% AM (1kHz) 80
modulation
This test is not
required when
Surges Tr/Th µs 1,2/50 (8/20)
normal functioning
line-to-line kV (open circuit voltage) ±1 IEC 61000-4-5 cannot be achieved B
because of the
line-to-earth kV (open circuit voltage) ±2
impact of the CDN
on the EUT
% reduction 30
B
periods 0,5
Voltage dips IEC 61000-4-11 –
% reduction 60
C
periods 5
NOTE The test level can also be defined as the equivalent current into a 150 Ω load.
Table 3 – Immunity levels – Ports for process measurement and control lines
Test Performance
Phenomena Units Basic standard Remarks
specification criteria
kV (peak) ±2
Fast transients 5/50 IEC 61000-4-4 Capacitive clamp B
Tr/Th ns
Repetition frequency kHz 5
See note
Radio- MHz 0,15 to 80
The test level
frequency V (unmod. r.m.s.) 10 IEC 61000-4-6 A
specified is prior to
common mode % AM (1kHz) 80
modulation
Applicable to process measurement and control ports interfacing to cables unless the total length according to the
manufacturer’s specifications does not exceed 3 m.
NOTE The test level can also be defined as the equivalent current into a 150 Ω load.
– 16 – 62135-2 © IEC:2007
Annex A
(informative)
Limits
A.1 General
The limits given in the standards referred to in the normative part of this standard are
summarized in this annex for information. As some of the references refer to specific parts of
tables of limits given in the referenced documents, only the applicable parts of those tables
are duplicated.
A.2 Mains terminal disturbance voltage limits
Source: CISPR 11:2003
Table A.1 – Mains terminal disturbance voltage limits, idle state
Class B Class A
Frequency
band
dBμV dBμV
MHz Quasi-peak Average Quasi-peak Average
66 56
Decreasing linearly with
0,15-0,50 79 66
logarithm of frequency to
56 46
0,50-30 56 46 73 60
Table A.2 – Mains terminal disturbance voltage limits, load conditions
a
Class B Class A Class A > 100 A
Frequency
band
dBμV dBμV dBμV
MHz Quasi-peak Average Quasi-peak Average Quasi-peak Average
66 56
Decreasing linearly with
0,15-0,50 100 90 130 120
logarithm of frequency to
56 46
0,50-5 56 46 86 76 125 115
90 80
Decreasing linearly with
5-30 60 50 115 105
logarithm of frequency to
70 60
a
Applicable to equipment with mains supply currents I in excess of 100 A per phase.
1cc
62135-2 © IEC:2007 – 17 –
A.3 Electromagnetic radiation disturbance limits
Source: CISPR 11:2003
Table A.3 – Electromagnetic radiation disturbance limits, idle state
Frequency Class B Class A
band (at 10 m measuring distance) (at 10 m measuring distance)
MHz dBμV/m dBμV/m
30-230 30 40
230-1 000 37 47
Table A.4 – Electromagnetic radiation disturbance limits, load conditions
Class B Class A
Frequency
At distance D from
On a test site On a test site
band
exterior wall of the
at 10 m test distance at 10 m test distance
building
MHz dBμV/m dBμV/m dBμV/m
30-47 30 68 48
47-53,91 30 50 30
53,9 -54,56 30 50 30
54,56-68 30 50 30
68-80,872 30 63 43
80,872-81,848 50 78 58
81,848-87 30 63 43
87-134,786 30 60 40
134,786-136,414 50 70 50
136,414 - 156 30 60 40
156-174 30 74 54
174-188,7 30 50 30
188,7-190,979 30 60 40
190,979-230 30 50 30
230-400 37 60 40
400-470 37 63 43
470-1 000 37 60 40
For equipment measured in situ, the measuring distance D from the exterior wall of the
building in which the equipment is situated equals (30 + x/a) m or 100 m whichever is smaller,
provided that the measuring distance D is within the boundary of the premises. In the case
where the calculated distance D is beyond the boundary of the premises, the measuring
distance D equals x or 30 m, whichever is longer.
For the calculation of the above values:
x is the nearest distance between the outside wall of the building in which the equipment is
situated and the boundary of the user’s premises in each measuring direction;
a = 2,5 for frequencies lower than 1 MHz;
a = 4,5 for frequencies equal to, or higher than, 1 MHz.
– 18 – 62135-2 © IEC:2007
A.4 Harmonic current limits
Sources: IEC 61000-3-2:2005 and IEC 61000-3-12:2004
Table A.5 – Maximum permissible harmonic current for
equipment with input current I ≤ 16 A
1cc
Harmonic order Harmonic current
n A
Odd harmonics
3 3,45
5 1,71
7 1,16
9 0,60
11 0,50
13 0,32
15 ≤ n ≤ 39 0,23 × 15/n
Even harmonics
2 1,62
4 0,65
6 0,45
8 ≤ n ≤ 40 0,35 × 8/n
Table A.6 – Current emission limits for equipment with 16 A < I ≤ 75 A
1cc
other than balanced three-phase equipment
Admissible individual
Admissible harmonic current
a
harmonic current I /I
distortion factors
Minimal R
n 1
sce
% %
I I I I I I THD PWHD
3 5 7 9 11 13
33 21,6 10,7 7,2 3,8 3,1 2 23 23
66 24 13 8 5 4 3 26 26
120 27 15 10 6 5 4 30 30
250 35 20 13 9 8 6 40 40
41 24 15 12 10 8 47 47
≥ 350
NOTE 1 The relative values of even harmonics up to order 12 should not exceed 16/n %. Even
harmonics above order 12 are taken into account in THD and PWHD in the same way as odd order
harmonics.
NOTE 2 Linear interpolation between successive R values are permitted.
sce
a
I = reference fundamental current; I = harmonic current component.
1 n
62135-2 © IEC:2007 – 19 –
Table A.7 – Current emission limits for
balanced three
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...