SIST EN 62135-2:2008
Resistance welding equipment -- Part 2: Electromagnetic compatibility (EMC) requirements
Resistance welding equipment -- Part 2: Electromagnetic compatibility (EMC) requirements
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. 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. This part of IEC 62135 also defines immunity requirements and test methods for continuous and transient, conducted and radiated disturbances including electrostatic discharges.
Widerstandsschweißeinrichtungen - Teil 2: Anforderungen an die elektromagnetische Verträglichkeit (EMV)
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.
Oprema za uporovno varjenje - 2. del: Zahteve za elektromagnetno združljivost (EMC) (IEC 62135-2:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 62135-2:2008
01-junij-2008
1DGRPHãþD
SIST EN 50240:2005
Oprema za uporovno varjenje - 2. del: Zahteve za elektromagnetno združljivost
(EMC) (IEC 62135-2:2007)
Resistance welding equipment -- Part 2: Electromagnetic compatibility (EMC)
requirements
Widerstandsschweißeinrichtungen - Teil 2: Anforderungen an die elektromagnetische
Verträglichkeit (EMV)
Matériels de soudage par résistance -- Partie 2: Exigences de compatibilité
électromagnétique (CEM)
Ta slovenski standard je istoveten z: EN 62135-2:2008
ICS:
25.160.30 Varilna oprema Welding equipment
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 62135-2:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 62135-2
NORME EUROPÉENNE
February 2008
EUROPÄISCHE NORM
ICS 25.160 Supersedes EN 50240:2004
English version
Resistance welding equipment -
Part 2: Electromagnetic compatibility (EMC) requirements
(IEC 62135-2:2007)
Matériels de soudage par résistance - Widerstandsschweißeinrichtungen -
Partie 2: Exigences de compatibilité Teil 2: Anforderungen an die
électromagnétique (CEM) elektromagnetische Verträglichkeit (EMV)
(CEI 62135-2:2007) (IEC 62135-2:2007)
This European Standard was approved by CENELEC on 2008-02-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62135-2:2008 E
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EN 62135-2:2008 – 2 –
Foreword
The text of document 26/342/CDV, future edition 1 of IEC 62135-2, prepared by IEC TC 26, Electric
welding, was submitted to the IEC-CENELEC Parallel Unique Acceptance Procedure and was approved
by CENELEC as EN 62135-2 on 2008-02-01.
This European Standard supersedes EN 50240:2004 + corrigendum December 2005.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2008-11-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2011-02-01
with the EN have to be withdrawn
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 2004/108/EC. See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62135-2:2007 was approved by CENELEC as a European
Standard without any modification.
__________
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– 3 – EN 62135-2:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1)
IEC 60050-161 – International Electrotechnical Vocabulary – –
(IEV) -
Chapter 161: Electromagnetic compatibility
1)
IEC 60050-851 – International Electrotechnical Vocabulary – –
(IEV) -
Chapter 851: Electric welding
IEC 61000-3-2 2005 Electromagnetic compatibility (EMC) - EN 61000-3-2 2006
Part 3-2: Limits - Limits for harmonic current
emissions (equipment input current ≤ 16 A
per phase)
IEC 61000-3-3 1994 Electromagnetic compatibility (EMC) - EN 61000-3-3 1995
Part 3-3: Limits - Limitation of voltage + corr. July 1997
A1 2001 changes, voltage fluctuations and flicker in A1 2001
A2 2005 public low-voltage supply systems, for A2 2005
equipment with rated current ≤ 16 A per
phase and not subject to conditional
connection
IEC 61000-3-11 2000 Electromagnetic compatibility (EMC) - EN 61000-3-11 2000
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) - EN 61000-3-12 2005
Part 3-12: Limits - Limits for harmonic
currents produced by equipment connected to
public low-voltage systems with input current
> 16 A and ≤ 75 A per phase
1) 2)
IEC 61000-4-2 – Electromagnetic compatibility (EMC) - EN 61000-4-2 1995
Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity
test
1)
Undated reference.
2)
Valid edition at date of issue.
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EN 62135-2:2008 – 4 –
Publication Year Title EN/HD Year
1) 2)
IEC 61000-4-3 – Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
1) 2)
IEC 61000-4-4 – Electromagnetic compatibility (EMC) - EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
1) 2)
IEC 61000-4-5 – Electromagnetic compatibility (EMC) - EN 61000-4-5 2006
Part 4-5: Testing and measurement
techniques - Surge immunity test
1) 2)
IEC 61000-4-6 – Electromagnetic compatibility (EMC) - EN 61000-4-6 2007
Part 4-6: Testing and measurement + corr. August 2007
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
1) 2)
IEC 61000-4-7 – Electromagnetic compatibility (EMC) - EN 61000-4-7 2002
Part 4-7: Testing and measurement
techniques - General guide on harmonics and
interharmonics measurements and
instrumentation, for power supply systems
and equipment connected thereto
1) 2)
IEC 61000-4-11 – Electromagnetic compatibility (EMC) - EN 61000-4-11 2004
Part 4-11: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations immunity tests
1) 2)
IEC 61000-4-15 – Electromagnetic compatibility (EMC) - EN 61000-4-15 1998
Part 4-15: Testing and measurement
techniques - Flickermeter - Functional and
design specifications
3)
IEC 62135-1 – Resistance welding equipment - – –
Part 1: Safety requirements for the design,
manufacture and the installation
4)
CISPR 11 (mod) 2003 Industrial scientific and medical (ISM) EN 55011 2007
radio-frequency equipment - Electromagnetic
disturbance characteristics - Limits and
methods of measurement
1) 2)
CISPR 14-1 – Electromagnetic compatibility - EN 55014-1 2006
Requirements for household appliances,
electric tools and similar apparatus -
Part 1: Emission
1) 2)
CISPR 16-1-1 – Specification for radio disturbance and EN 55016-1-1 2007
immunity measuring apparatus and methods -
Part 1-1: Radio disturbance and immunity
measuring apparatus - Measuring apparatus
3)
At draft stage.
4)
EN 55011 includes A1:2004 (mod.) to CISPR 11.
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– 5 – EN 62135-2:2008
Publication Year Title EN/HD Year
1) 2)
CISPR 16-1-2 – Specification for radio disturbance and EN 55016-1-2 2004
immunity measuring apparatus and methods -
Part 1-2: Radio disturbance and immunity
measuring apparatus - Ancillary equipment -
Conducted disturbances
1) 2)
CISPR 16-1-4 – Specification for radio disturbance and EN 55016-1-4 2007
immunity measuring apparatus and methods -
Part 1-4: Radio disturbance and immunity
measuring apparatus - Ancillary equipment -
Radiated disturbances
1)
ISO 669 – Resistance welding - Resistance welding – –
equipment - Mechanical and electrical
requirements
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EN 62135-2:2008 – 6 –
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers all
relevant essential requirements as given in Annex I of the EC Directive 2004/108/EC.
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
__________
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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
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– 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
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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
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– 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.
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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.
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– 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)
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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
1
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
———————
1
There exists a consolidated edition 1.2 (2005) that includes edition 1 and its amendments 1 and 2.
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– 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.
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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
...
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