EN IEC 62135-2:2021

Resistance welding equipment - Part 2: Electromagnetic compatibility (EMC) requirements

IEC 62135-2:2020 is available as IEC 62135-2:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62135-2:2020 is applicable to equipment for resistance welding and allied processes which are connected to mains supplies with rated voltages up to 1 000 V AC RMS. This document does not define safety requirements. This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - update of the applicable limits related to the updated references; - implementation of radiated magnetic field requirements.

Widerstandsschweißeinrichtungen - Teil 2: Anforderungen an die elektromagnetische Verträglichkeit (EMV)

Matériels de soudage par résistance - Partie 2: Exigences de compatibilité électromagnétique (CEM)

IEC 62135-2:2020 est disponible sous forme de IEC 62135-2:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L’IEC 62135-2:2020 est applicable aux matériels de soudage par résistance et procédés connexes qui sont connectés aux réseaux d’alimentation avec des tensions assignées jusqu’à 1 000 V efficace en courant alternatif. Le présent document ne définit pas d’exigences de sécurité. Cette troisième édition annule et remplace la deuxième édition parue en 2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - mise à jour des limites applicables conformément aux références mises à jour; - mise en œuvre des exigences du champ magnétique rayonné.

Oprema za uporovno varjenje - 2. del: Zahteve za elektromagnetno združljivost (EMC) (IEC 62135-2:2020)

Ta del standarda IEC 62135 se uporablja za opremo za uporovno varjenje in povezane procese, ki so povezani z omrežnim napajanjem in imajo nazivno napetost do 1000 V izmenične napetosti RMS. Ta dokument ne določa varnostnih zahtev.
Oprema za uporovno varjenje, ki je tipsko preskušena v skladu s tem dokumentom in izpolnjuje njegove zahteve, je skladna za vse vrste uporabe.
Zajet frekvenčni razpon je od 0 Hz do 400 GHz.
Oprema za obločno varjenje z radijskim sprejemnikom ali oddajnikom spada na področje uporabe tega dokumenta. Dodatne zahteve za takšno opremo so določene v dodatku D.
Zahteve glede elektromagnetnega sevanja iz tega dokumenta niso namenjene za uporabo za namerne prenose iz radijskega oddajnika, kot ga opredeljuje ITU, in morebitna neželena oddajanja, povezana s temi namernimi prenosi.
Ta standard za izdelek v zvezi z elektromagnetno združljivostjo za opremo za uporovno varjenje ima prednost pred vsemi vidiki splošnih standardov, pri čemer dodatni preskusi elektromagnetne združljivosti niso potrebni ali zahtevani.
OPOMBA 1: Običajni povezani procesi so uporovno trdo ali mehko spajkanje ali uporovno gretje, ki se doseže na način, primerljiv z opremo za uporovno varjenje.
OPOMBA 2: Mejne vrednosti so določene samo za del frekvenčnega razpona.
Oprema za uporovno varjenje se uvršča v razred A in razred B.
Ta del standarda IEC 62135 določa:
a) preskusne metode, ki se uporabljajo skupaj s standardi CISPR 11:2015, CISPR 11:2015/AMD1:2016 in CISPR 11:2015/AMD2:2019 za določevanje radiofrekvenčnih (RF) emisij;
b) ustrezne standarde in preskusne metode za emisije harmonskih tokov, spremembe ter nihanje napetosti;
c) dodatne zahteve za opremo, ki se napaja prek notranjih ali zunanjih baterij (dodatek C).
OPOMBA 3: Omejitve v tem dokumentu pa ne morejo zagotoviti popolne zaščite pred motnjami radijskega in televizijskega sprejema, kadar se oprema za uporovno varjenje uporablja bližje kot 30 m od sprejemne antene.
OPOMBA 4: V posebnih primerih, kadar se v neposredni bližini uporablja izredno občutljiv aparat,
se včasih izvedejo dodatni ukrepi za zmanjšanje elektromagnetnih emisij.
OPOMBA 5: Izvor mejnih vrednosti v tem dokumentu je povzet v dodatku A.
Ta del standarda IEC 62135 določa tudi zahteve glede odpornosti in preskusne metode za neprekinjene in začasne ter vodene in sevane motnje, vključno z elektrostatičnimi razelektritvami.
OPOMBA 6: Te zahteve pa ne obravnavajo skrajnih primerov, ki so izredno redki.

General Information

• Status: Published
• Publication Date: 09-Dec-2021
• ICS: 25.160.30 - Welding equipment
• Technical Committee: CLC/TC 26 - Electric welding
• Drafting Committee: IEC/TC 26 - IEC_TC_26
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 10-Dec-2021
• Completion Date: 10-Dec-2021
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Mandate: M/536 - [C(2015)536] Standardisation request as regards radio equipment in support of Directive 2014/53/EU
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Ref Project: SIST EN IEC 62135-2:2022 - Resistance welding equipment - Part 2: Electromagnetic compatibility (EMC) requirements (IEC 62135-2:2020)

Relations

• Replaces: EN 62135-2:2015 - Resistance welding equipment - Part 2: Electromagnetic compatibility (EMC) requirements
• Effective Date: 17-Jul-2018

Overview

EN IEC 62135-2:2021 (equivalent to IEC 62135-2:2020 RLV) specifies electromagnetic compatibility (EMC) requirements for resistance welding equipment and allied processes connected to mains supplies with rated voltages up to 1 000 V AC RMS. This third edition replaces the 2015 edition and is a technical revision that updates applicable limits and implements radiated magnetic field requirements. The standard addresses EMC performance (emissions and immunity) and test conditions but does not define safety requirements.

Key topics and technical requirements

• Scope and classification
  • Applies to resistance welding equipment and allied processes; distinguishes equipment classes (Class A / Class B) for emission limits.
• Emission requirements
  • Limits for mains terminal disturbance voltage, conducted and radiated emissions, and low‑frequency emission criteria. Emission limit tables and measurement arrangements are provided.
• Immunity requirements
  • Immunity test procedures and levels for ESD, radiated RF fields, electrical fast transients (EFT), surge, conducted RF immunity, voltage dips/interruptions and other disturbances relevant to industrial environments.
• Test setup and measurement
  • Specifications for test conditions, measuring instruments, artificial mains networks, probes, antennas and in‑situ H‑field measurement positions.
• Performance criteria
  • Defined performance criteria (A/B/C) describing acceptable functional degradation and required recovery after EMC disturbances.
• Special annexes
  • Additional normative annexes for battery‑powered equipment and for equipment containing radio devices, and informative annexes with limit tables and symbols.
• Significant updates
  • Revision of referenced limits (aligned to updated IEC/CISPR documents) and explicit radiated magnetic field requirements for welding equipment.

Practical applications and users

• Manufacturers of resistance welding machines use EN IEC 62135-2:2021 to design equipment that meets EMC emission and immunity requirements for European and international markets.
• EMC engineers and test laboratories implement the test setups, measurement methods and performance criteria to verify compliance.
• Quality, compliance and procurement teams use the standard to specify requirements in tenders and acceptance tests for welding systems.
• System integrators and plant engineers ensure welding equipment will operate reliably in industrial environments and not disturb nearby sensitive equipment.

Related standards

• EN/IEC 62135-1 (Safety requirements for resistance welding equipment)
• IEC 61000 series (EMC limits and testing: 4‑2, 4‑3, 4‑4, 4‑5, 4‑6, 4‑11, 6‑1, 6‑2, 6‑4, etc.)
• CISPR 11 / CISPR 16 family (emission measurement standards)
• ISO 669 (mechanical/electrical requirements for resistance welding equipment)

Keywords: EN IEC 62135-2:2021, resistance welding equipment, EMC requirements, electromagnetic compatibility, EMC testing, radiated magnetic field, emission limits, immunity tests.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2022
Nadomešča:
SIST EN 62135-2:2015
Oprema za uporovno varjenje - 2. del: Zahteve za elektromagnetno združljivost
(EMC) (IEC 62135-2:2020)
Resistance welding equipment - Part 2: Electromagnetic compatibility (EMC)
requirements (IEC 62135-2:2020)
Widerstandsschweißeinrichtungen - Teil 2: Anforderungen an die elektromagnetische
Verträglichkeit (EMV) (IEC 62135-2:2020)
Matériels de soudage par résistance - Partie 2: Exigences de compatibilité
électromagnétique (CEM) (IEC 62135-2:2020)
Ta slovenski standard je istoveten z: EN IEC 62135-2:2021
ICS:
25.160.30 Varilna oprema Welding equipment
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62135-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 25.160.30 Supersedes EN 62135-2:2015 and all of its amendments
and corrigenda (if any)
English Version
Resistance welding equipment - Part 2: Electromagnetic
compatibility (EMC) requirements
(IEC 62135-2:2020)
Matériels de soudage par résistance - Partie 2: Exigences Widerstandsschweißeinrichtungen - Teil 2: Anforderungen
de compatibilité électromagnétique (CEM) an die elektromagnetische Verträglichkeit (EMV)
(IEC 62135-2:2020) (IEC 62135-2:2020)
This European Standard was approved by CENELEC on 2021-11-10. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62135-2:2021 E

European foreword
The text of document 26/696/FDIS, future edition 3 of IEC 62135-2, prepared by IEC/TC 26 "Electric
welding" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-08-10
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-11-10
document have to be withdrawn
This document supersedes EN 62135-2:2015 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62135-2:2020 was approved by CENELEC as a European
Standard without any modification.
Dans la version officielle, ajouter dans la Bibliographie les notes suivantes pour les normes indiquées:
IEC 60417 NOTE Harmonisée comme HD 243 S7
IEC 60974-9:2018 NOTE Harmonisée comme EN IEC 60974-9:2018 (non modifiée)
CISPR 32:2015 NOTE Harmonisée comme EN 55032:2015 (non modifiée) + A11:2020
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61000-3-2 2018 Electromagnetic compatibility (EMC) - Part 3- EN IEC 61000-3-2 2019
2: Limits - Limits for harmonic current
emissions (equipment input current ≤ 16 A
per phase)
IEC 61000-3-3 2013 Electromagnetic compatibility (EMC) - Part 3- EN 61000-3-3 2013
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
+ A1 2017  + A1 2019
IEC 61000-3-11 2017 Electromagnetic compatibility (EMC) - Part 3- EN IEC 61000-3-11 2019
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- EN 61000-3-12 2011
12: Limits - 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- EN 61000-4-2 2009
2: Testing and measurement techniques -
Electrostatic discharge immunity test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-3 2006
3 : Testing and measurement techniques -
Radiated, radio-frequency, electromagnetic
field immunity test
+ A1 2007  + A1 2008
+ A2 2010  + A2 2010
Publication Year Title EN/HD Year
IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-4 2012
4: Testing and measurement techniques -
Electrical fast transient/burst immunity test
IEC 61000-4-5 2014 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-5 2014
5: Testing and measurement techniques -
Surge immunity test
+ A1 2017  + A1 2017
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-6 2014
6: Testing and measurement techniques -
Immunity to conducted disturbances, induced
by radio-frequency fields
IEC 61000-4-11 2004 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-11 2004
11: Testing and measurement techniques -
Voltage dips, short interruptions and voltage
variations immunity tests
+ A1 2017  + A1 2017
IEC 61000-4-34 2005 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-34 2007
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
+ A1 2009  + A1 2009
IEC 61000-6-1 2016 Electromagnetic compatibility (EMC) - Part 6- EN IEC 61000-6-1 2019
1: Generic standards - Immunity standard for
residential, commercial and light-industrial
environments
IEC 61000-6-2 2016 Electromagnetic compatibility (EMC) - Part 6- EN IEC 61000-6-2 2019
2: Generic standards - Immunity standard for
industrial environments
IEC 61000-6-3 2006 Electromagnetic compatibility (EMC) - Part 6- EN 61000-6-3 2007
3: Generic standards - Emission standard for
residential, commercial and light-industrial
environments
+ A1 2010  + A1 2011
- -  + AC 2012
IEC 61000-6-4 2018 Electromagnetic compatibility (EMC) - Part 6- EN IEC 61000-6-4 2019
4: Generic standards - Emission standard for
industrial environments
IEC 62135-1 2015 Resistance welding equipment - Part 1: EN 62135-1 2015
Safety requirements for design, manufacture
and installation
ISO 669 2016 Resistance welding - Resistance welding EN ISO 669 2016
equipment - Mechanical and electrical
requirements
Publication Year Title EN/HD Year
CISPR 11 (mod) 2015 Industrial, scientific and medical equipment - EN 55011 2016
Radio-frequency disturbance characteristics -
Limits and methods of measurement
+ A1 2016  + A1 2017
- -  + A11 2020
+ A2 2019  + A2 2021
CISPR 16-1-1 2019 Specification for radio disturbance and EN IEC 55016-1-1 2019
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 EN 55016-1-2 2014
immunity measuring apparatus and methods
- Part 1-2: Radio disturbance and immunity
measuring apparatus - Coupling devices for
conducted disturbance measurements
+ A1 2017  + A1 2018
CISPR 16-1-4 2019 Specification for radio disturbance and EN IEC 55016-1-4 2019
immunity measuring apparatus and methods
- Part 1-4: Radio disturbance and immunity
measuring apparatus - Antennas and test
sites for radiated disturbance measurements

IEC 62135-2 ®
Edition 3.0 2020-03
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
INTERNATIONALE
ICS 25.160.30 ISBN 978-2-8322-8028-7

– 2 – IEC 62135-2:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 General test requirements . 10
4.1 Test conditions . 10
4.2 Measuring instruments . 10
4.3 Artificial mains network . 10
4.4 Voltage probe . 11
4.5 Antennas . 11
5 Test set-up for emission and immunity . 11
5.1 General requirements . 11
5.2 Ancillary equipment . 12
6 Emission tests . 12
6.1 Classification of equipment . 12
6.1.1 Class A equipment . 12
6.1.2 Class B equipment . 13
6.2 Test conditions . 13
6.2.1 Test conditions for RF tests . 13
6.2.2 Test conditions for low-frequency tests . 13
6.3 Emission limits . 14
6.3.1 Mains terminal disturbance voltage . 14
6.3.2 Electromagnetic radiation disturbance . 16
6.3.3 Low-frequency emission limits . 19
6.3.4 Conducted emissions at signal, control and measurement ports . 19
7 Immunity tests . 20
7.1 Tests applicability . 20
7.2 Test conditions . 20
7.3 Immunity performance criteria . 20
7.3.1 Performance criteria A . 20
7.3.2 Performance criteria B . 20
7.3.3 Performance criteria C . 21
7.4 Immunity levels . 21
8 Documentation for the purchaser/user . 23
Annex A (informative) Limits . 25
A.1 General . 25
A.2 Mains terminal disturbance voltage limits . 25
A.3 Electromagnetic radiation disturbance limits . 25
Annex B (informative) Symbols . 26
Annex C (normative) Battery powered equipment . 27
C.1 General . 27
C.2 Additional emission requirements . 27
C.3 Additional immunity requirements . 27
Annex D (normative) Equipment containing radio devices . 28
D.1 General . 28

IEC 62135-2:2020 © IEC 2020 – 3 –
D.2 Additional emission requirements . 28
D.3 Additional immunity requirements . 28
Bibliography . 29

Figure 1 – Examples of ports . 9
Figure 2 – Test position for H field measurement . 12

Table 1 – Disturbance voltage limits – Idle state . 15
Table 2 – Disturbance voltage limits for Class A equipment – Loaded state . 16
Table 3 – Electromagnetic radiation disturbance limits – Idle state . 17
Table 4 – Electromagnetic radiation disturbance limits for Class A equipment – Loaded
state . 17
Table 5 – Electric field radiation disturbance limits for Class B equipment – Loaded
state . 18
Table 6 – Magnetic field radiation disturbance limits for Class B equipment – Loaded
state . 18
Table 7 – In-situ electromagnetic radiation disturbance limits for Class A equipment –
Loaded state . 19
Table 8 – Immunity levels – Enclosure . 21
Table 9 – Immunity levels – AC input power port . 22
Table 10 – Immunity levels – Ports for measurement and control . 23
Table B.1 – Symbols to describe EMC properties . 26

– 4 – IEC 62135-2:2020 © IEC 2020
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, Publicly Available Specifications (PAS) 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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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.
This third edition cancels and replaces the second edition published in 2015. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) update of the applicable limits related to the updated references;
b) implementation of radiated magnetic field requirements.

IEC 62135-2:2020 © IEC 2020 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
26/696/FDIS 26/698/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 of the IEC 62135 series, under the general title Resistance welding
equipment, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC 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.
– 6 – IEC 62135-2:2020 © IEC 2020
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 AC RMS. This
document does not define safety requirements.
Resistance welding equipment type tested in accordance with, and which has met the
requirements of, this document, is deemed to be in compliance for all applications.
The frequency range covered is from 0 Hz to 400 GHz.
Arc welding equipment containing a radio receiver or transmitter is within the scope of this
document. Additional requirements for such equipment is specified in Annex D.
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 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 11:2015, CISPR 11:2015/AMD1:2016
and CISPR 11:2015/AMD2:2019 to determine radio-frequency (RF) emission;
b) relevant standards and test methods for harmonic current emission, voltage fluctuation
and flicker;
c) additional requirements for equipment powered by internal or external batteries (Annex C).
NOTE 3 The limits in this document cannot, 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 are sometimes employed to further reduce the electromagnetic emissions.
NOTE 5 The origins of the limit values in this document are summarized in Annex A.
This part of IEC 62135 also defines immunity requirements and test methods for continuous
and transient, conducted and radiated disturbances including electrostatic discharges.
NOTE 6 These requirements do not, however, cover extreme cases which are extremely rare.

IEC 62135-2:2020 © IEC 2020 – 7 –
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 61000-3-2:2018, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current ≤ 16 A per phase)
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

– 8 – IEC 62135-2:2020 © IEC 2020
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
IEC 62135-1:2015, Resistance welding equipment – Part 1: Safety requirements for design,
manufacture and installation
ISO 669:2016, Resistance welding – Resistance welding equipment – Mechanical and
electrical requirements
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 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, the following terms and definitions 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
cable port
point at which a conductor or a cable is connected to the apparatus
Note 1 to entry: Examples are signal, control and power ports.
Note 2 to entry: The welding circuit of resistance welding equipment is not a cable port but is part of the
enclosure port.
3.2
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.

IEC 62135-2:2020 © IEC 2020 – 9 –
[SOURCE: IEC 60050-851:2008, 851-15-13]
3.3
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or
impinge
3.4
FAR
fully-anechoic chamber
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]
3.5
idle state
operating state in which the power is switched on and the welding circuit is not energized
Note 1 to entry: For some types of equipment there is no idle state.
Note 2 to entry: For a power source in a mechanized system, the configuration to achieve idle state is defined by
the manufacturer.
Note 3 to entry: An idle state can include a low energy state in which a welding process cannot be started without
automatic or manual reactivation.
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.

– 10 – IEC 62135-2:2020 © IEC 2020
[SOURCE: IEC Guide 107:2009, 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
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]
3.9
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".]
3.10
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 for the
apparatus at its rated supply voltage and frequency as given in IEC 62135-1:2015. Results
obtained for RF 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 16-1-1:2019 and the
standards referred to in Table 8, Table 9 and Table 10 as applicable.
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 a 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.

IEC 62135-2:2020 © IEC 2020 – 11 –
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 below 30 MHz the antenna shall be a loop as specified in
CISPR 16-1-4:2019.
In the frequency range from 30 MHz to 1 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.
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 document.
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.
For electromagnetic radiation disturbance tests the separation between the antenna and the
equipment under test shall be as specified in Clause 6 of CISPR 11:2015, CISPR
11:2015/AMD1:2016 and CISPR 11:2015/AMD2:2019.
For radiated emission test in the frequency range between 150 kHz and 1 MHz, the antenna
shall be positioned on the axis z, as given in Figure 2, perpendicular to the plane x, y of the
welding circuit.
– 12 – IEC 62135-2:2020 © IEC 2020

Figure 2 – Test position for H field measurement
Specific test set-up geometries for immunity tests are found in the basic standards referred to
in Table 8, Table 9 and Table 10.
Class A resistance welding equipment may be measured either on a test site or in situ as
preferred by the manufacturer.
NOTE 1 Due to size, complexity or operating conditions, some resistance welding equipment are sometimes
measured in situ in order to show compliance with the radiation disturbance limits specified herein.
NOTE 2 By their nature, in situ tests are not adequate for type testing purposes.
Class B resistance welding equipment shall be measured on a test site.
The configuration of the resistance welding equipment under test shall be precisely noted in
the test report.
5.2 Ancillary equipment
Ancillary equipment shall be tested in conjunction with the resistance welding equipment. It
shall be connected, installed, configured and operated as recommended by the manufacturer.
6 Emission tests
6.1 Classification of equipment
6.1.1 Class A equipment
Class A equipment is equipment suitable for use in all locations other than those allocated in
residential environments and those directly connected to a low voltage power supply network
which supplies buildings used for domestic purposes.
NOTE This definition originates from CISPR 11:2015, 5.2.
Class A equipment shall meet Class A limits in accordance with 6.3.

IEC 62135-2:2020 © IEC 2020 – 13 –
6.1.2 Class B equipment
Class B equipment is equipment suitable for use in residential environments and in
establishments directly connected to a low voltage power supply network which supplies
buildings used for domestic purposes.
NOTE This definition originates from CISPR 11:2015, 5.2.
Class B equipment shall meet Class B limits in accordance with 6.3.
6.2 Test conditions
6.2.1 Test conditions for RF tests
Measurements to determine compliance with the emission limits shall be made in accordance
with the test procedures in CISPR 11:2015, CISPR 11:2015/AMD1:2016 and CISPR
11:2015/AMD2:2019 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 according to ISO 669:2016;
– adjust the current to obtain the highest emission, if means of adjustment are provided;
NOTE For thyristor-controlled equipment, an ignition delay angle of 90° typically gives 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 according to ISO 669:2016;
– adjust the current to obtain the highest emission, if means of adjustment are provided;
– calculate the equipment duty cycle X at the maximum welding current based on Formula (1)
and
I
( )
2P
(1)
X =
I
( )
2cc
where
I is the permanent output current;
2P
I is the maximum short circuit welding current;
2cc
– 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.
– 14 – IEC 62135-2:2020 © IEC 2020
The test parameters chosen shall be fully documented.
The arithmetic average value of 1,5 s smoothed RMS supply current values (I as per
ref
IEC 61000-3-12:2011) shall be measured when the welding equipment is delivering its
maximum rated output current I .
2cc
For welding equipment with a rated maximum supply current I below 16 A, the reference
1cc
current I for the definition of limits shall be 16 A.
ref
The maximum and arithmetic average values of 1,5 s smoothed RMS
...