EN IEC 60974-1:2018
(Main)Arc welding equipment - Part 1: Welding power sources
Arc welding equipment - Part 1: Welding power sources
IEC 60974-1:2012 is applicable to power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding 1 000 V, or driven by mechanical means. This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems. This fourth edition cancels and replaces the third edition published in 2005 and constitutes a technical revision. The significant changes with respect to the previous edition are the following: - the heating test shall be carried out at ambient temperature of 40 °C (see 5.1); - new Figure 1 summarizes example of insulation requirements; - creepage distances for pollution degree 4 are no longer valid (see Table 2); - insulation requirements for Class II equipment are defined (see Table 3); - dielectric test voltage interpolation restriction lower limit is changed to 220 V and interpolation for control and welding circuit is clarified (see Table 4); - water test is clarified by suppression of visual inspection (see 6.2.1); - isolation requirements of the supply circuit and the welding circuit are moved in protection against electric shock in normal service (see 6.2.4); - touch current in normal service and in single fault condition requirements are changed (see 6.2.5, 6.2.6 and 6.3.6); - maximum temperature for insulation systems are reviewed in accordance with current edition of IEC 60085 (see Table 6); - limits of temperature rise for external surfaces are updated depending of unintentional contact period as defined in ISO 13732-1 (see Table 7); - loading test is completed by a dielectric test (see 7.4); - conformity test for tolerance to supply voltage fluctuation is clarified (see 10.1); - marking of terminals is limited to external protective conductor and three-phase equipment terminals (see 10.4); - usage of hazard reducing device is clarified (see 11.1); - requirements for control circuits are changed (see Clause 12); - impact test is clarified (see 14.2.2); - environmental parameters are completed (see Annex M).
Lichtbogenschweißeinrichtungen - Teil 1: Schweißstromquellen
Matériel de soudage à l'arc - Partie 1: Sources de courant de soudage
La CEI 60974-1:2012 s'applique aux sources de courant de soudage à l'arc et techniques connexes conçues pour un usage industriel et professionnel et alimentées sous une tension ne dépassant pas 1 000 V, ou entraînées par des moyens mécaniques. La présente partie de la CEI 60974 spécifie les exigences de sécurité et de fonctionnement des sources de courant de soudage et des systèmes de coupage plasma. Cette quatrième édition annule et remplace la troisième édition parue en 2005, et constitue une révision technique. Les modifications majeures par rapport à l'édition précédente sont les suivantes: - l'essai d échauffement doit être réalisé à une température ambiante de 40 °C (voir 5.1); - la nouvelle Figure 1 fournit un récapitulatif des exigences d'isolement; - les lignes de fuite pour le degré de pollution 4 ne sont plus valables (voir Tableau 2); - les exigences d'isolement pour le matériel de Classe II sont définies (voir Tableau 3); - la limite inférieure restrictive d'interpolation de la tension d'essai diélectrique est modifiée et passe à 220 V et l'interpolation pour le circuit de commande et de soudage est clarifié (voir Tableau 4); - l'essai à l'eau est simplifié par la suppression de l'examen visuel (voir 6.2.1); - les exigences d'isolement du circuit d'alimentation et du circuit de soudage sont transformées en protection contre les chocs électriques en service normal (voir 6.2.4); - les exigences relatives au courant de contact en service normal et en condition de défaut simple sont modifiées (voir 6.2.5, 6.2.6 et 6.3.6); - les valeurs de température maximale pour les systèmes d'isolement sont révisées conformément à l'édition actuelle de la CEI 60085 (voir Tableau 6); - les limites d'échauffement pour les surfaces externes sont mises à jour en fonction de la durée des contacts involontaires, telle que définie dans l'ISO 13732-1 (voir Tableau 7); - l'essai en charge est complété par un essai diélectrique (voir 7.4); - l'essai de conformité pour les tolérances aux fluctuations de la tension d'alimentation est clarifié (voir 10.1); - le marquage des bornes est limité aux bornes des conducteurs de protection externes et des matériels triphasés (voir 10.4); - l'usage des dispositifs réducteurs de risques est clarifié (voir 11.1); - les exigences relatives aux circuits de commande sont modifiées (voir l'Article 12); - l'essai au choc est clarifié (voir 14.2.2); - les paramètres d'ambiance sont complétés (voir Annexe M).
Naprave za obločno varjenje - 1. del: Viri varilnega toka (IEC 60974-1:2017)
Ta del standarda IEC 60974-1:2012 se uporablja za vire toka za obločno varjenje in z njim povezane postopke, namenjene za profesionalno in industrijsko uporabo, ki se napajajo z napetostjo, manjšo od 1000 V, ali jih poganjajo mehanska sredstva. Ta del standarda IEC 60974 določa zahteve glede varnosti in zmogljivosti za vire varilnega toka in plazemske rezalne sisteme. Ta četrta izdaja razveljavlja in nadomešča tretjo izdajo, objavljeno leta 2005, in predstavlja tehnično popravljeno izdajo. Pomembne spremembe glede na predhodno različico: – preskus segrevanja je treba izvesti pri temperaturi okolice 40 ° C (glej 5.1); – nova Slika 1 povzema primer zahtev glede izolacije; – plazilne razdalje za stopnjo onesnaženosti 4 niso več veljavne (glej preglednico 2); – podane so zahteve glede izolacije opreme razreda II (glej preglednico 3); – spodnja omejitvena vrednost napetostne interpolacije pri dielektričnih preskusih je spremenjena v 220 V in pojasnjena je interpolacija za kontrolni in varilni tokokrog (glej preglednico 4); – vodni preskus je pojasnjen z zadušitvijo vizualnega pregleda (glej 6.2.1); –zahteve glede izolacije napajalnega tokokroga in varilnega tokokroga so premaknjene v zaščito pred električnim udarom pri običajni uporabi (glej 6.2.4); – spremenjene so zahteve glede toka dotika pri običajni uporabi in v razmerah posamične okvare (glej 6.2.5, 6.2.6 in 6.3.6); – največje temperaturne vrednosti za izolacijske sisteme so revidirane v skladu s trenutno izdajo standarda IEC 60085 (glej preglednico 6); – omejitve povečevanja temperature za zunanje površine so posodobljene glede na obdobje nenamernega stika, kot je opredeljeno v standardu ISO 13732-1 (glej preglednico 7); – preskus obremenitve se konča z dielektričnim preskusom (glej 7.4); – pojasnjen je preskus skladnosti za tolerance pri nihanjih napajalne napetosti (glej 10.1); – označevanje priključkov je omejeno na zunanji zaščitni prevodnik in trifazne priključke opreme (glej 10.4); – pojasnjena je uporaba naprave za zmanjševanje nevarnosti (glej 11.1); – spremenjene so zahteve za krmilna vezja (glej točko 12); – pojasnjen je udarni preskus (glej 14.2.2); – dokončani so okoljski parametri (glej dodatek M).
General Information
- Status
- Withdrawn
- Publication Date
- 27-Sep-2018
- Withdrawal Date
- 27-Sep-2021
- Technical Committee
- CLC/TC 26 - Electric welding
- Drafting Committee
- IEC/TC 26 - IEC_TC_26
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 25-Oct-2025
- Completion Date
- 25-Oct-2025
Relations
- Effective Date
- 23-Jan-2023
- Effective Date
- 24-Dec-2019
- Effective Date
- 10-Apr-2018
Frequently Asked Questions
EN IEC 60974-1:2018 is a standard published by CLC. Its full title is "Arc welding equipment - Part 1: Welding power sources". This standard covers: IEC 60974-1:2012 is applicable to power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding 1 000 V, or driven by mechanical means. This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems. This fourth edition cancels and replaces the third edition published in 2005 and constitutes a technical revision. The significant changes with respect to the previous edition are the following: - the heating test shall be carried out at ambient temperature of 40 °C (see 5.1); - new Figure 1 summarizes example of insulation requirements; - creepage distances for pollution degree 4 are no longer valid (see Table 2); - insulation requirements for Class II equipment are defined (see Table 3); - dielectric test voltage interpolation restriction lower limit is changed to 220 V and interpolation for control and welding circuit is clarified (see Table 4); - water test is clarified by suppression of visual inspection (see 6.2.1); - isolation requirements of the supply circuit and the welding circuit are moved in protection against electric shock in normal service (see 6.2.4); - touch current in normal service and in single fault condition requirements are changed (see 6.2.5, 6.2.6 and 6.3.6); - maximum temperature for insulation systems are reviewed in accordance with current edition of IEC 60085 (see Table 6); - limits of temperature rise for external surfaces are updated depending of unintentional contact period as defined in ISO 13732-1 (see Table 7); - loading test is completed by a dielectric test (see 7.4); - conformity test for tolerance to supply voltage fluctuation is clarified (see 10.1); - marking of terminals is limited to external protective conductor and three-phase equipment terminals (see 10.4); - usage of hazard reducing device is clarified (see 11.1); - requirements for control circuits are changed (see Clause 12); - impact test is clarified (see 14.2.2); - environmental parameters are completed (see Annex M).
IEC 60974-1:2012 is applicable to power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding 1 000 V, or driven by mechanical means. This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems. This fourth edition cancels and replaces the third edition published in 2005 and constitutes a technical revision. The significant changes with respect to the previous edition are the following: - the heating test shall be carried out at ambient temperature of 40 °C (see 5.1); - new Figure 1 summarizes example of insulation requirements; - creepage distances for pollution degree 4 are no longer valid (see Table 2); - insulation requirements for Class II equipment are defined (see Table 3); - dielectric test voltage interpolation restriction lower limit is changed to 220 V and interpolation for control and welding circuit is clarified (see Table 4); - water test is clarified by suppression of visual inspection (see 6.2.1); - isolation requirements of the supply circuit and the welding circuit are moved in protection against electric shock in normal service (see 6.2.4); - touch current in normal service and in single fault condition requirements are changed (see 6.2.5, 6.2.6 and 6.3.6); - maximum temperature for insulation systems are reviewed in accordance with current edition of IEC 60085 (see Table 6); - limits of temperature rise for external surfaces are updated depending of unintentional contact period as defined in ISO 13732-1 (see Table 7); - loading test is completed by a dielectric test (see 7.4); - conformity test for tolerance to supply voltage fluctuation is clarified (see 10.1); - marking of terminals is limited to external protective conductor and three-phase equipment terminals (see 10.4); - usage of hazard reducing device is clarified (see 11.1); - requirements for control circuits are changed (see Clause 12); - impact test is clarified (see 14.2.2); - environmental parameters are completed (see Annex M).
EN IEC 60974-1:2018 is classified under the following ICS (International Classification for Standards) categories: 25.160 - Welding, brazing and soldering. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 60974-1:2018 has the following relationships with other standards: It is inter standard links to EN 60974-1:2012, EN IEC 60974-1:2022, EN IEC 60974-1:2018/A1:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 60974-1:2018 is associated with the following European legislation: EU Directives/Regulations: 2006/95/EC, 2014/35/EU; Standardization Mandates: M/511. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase EN IEC 60974-1:2018 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2018
1DGRPHãþD
SIST EN 60974-1:2012
1DSUDYH]DREORþQRYDUMHQMHGHO 9LULYDULOQHJDWRND ,(&
Arc welding equipment - Part 1: Welding power sources (IEC 60974-1:2017)
Lichtbogenschweißeinrichtungen - Teil 1: Schweißstromquellen (IEC 60974-1:2017)
Matériel de soudage à l'arc - Partie 1: Sources de courant de soudage (IEC 60974-
1:2017)
Ta slovenski standard je istoveten z: EN IEC 60974-1:2018
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60974-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2018
ICS 25.160 Supersedes EN 60974-1:2012
English Version
Arc welding equipment - Part 1: Welding power sources
(IEC 60974-1:2017)
Matériel de soudage à l'arc - Partie 1: Sources de courant Lichtbogenschweißeinrichtungen - Teil 1:
de soudage Schweißstromquellen
(IEC 60974-1:2017) (IEC 60974-1:2017)
This European Standard was approved by CENELEC on 2018-07-15. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60974-1:2018 E
European foreword
The text of document 26/610/FDIS, future edition 5 of IEC 60974-1, 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) 2019-03-28
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2021-09-28
document have to be withdrawn
This document supersedes EN 60974-1:2012.
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.
Endorsement notice
The text of the International Standard IEC 60974-1:2017 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60038:2009 NOTE Harmonized as EN 60038:2011 (modified)
IEC 60085 NOTE Harmonized as EN 60085
IEC 60204-1 NOTE Harmonized as EN 60204-1
IEC 60309-1 NOTE Harmonized as EN 60309-1
IEC 60335-2-29 NOTE Harmonized as EN 60335-2-29
IEC 60384-14 NOTE Harmonized as EN 60384-14
IEC 60950-1 NOTE Harmonized as EN 60950-1
IEC 60974-3 NOTE Harmonized as EN 60974-3
IEC 60974-4 NOTE Harmonized as EN 60974-4
IEC 60974-6 NOTE Harmonized as EN 60974-6
IEC 60974-9 NOTE Harmonized as EN IEC 60974-9
IEC 60974-10 NOTE Harmonized as EN 60974-10
IEC 60974-12 NOTE Harmonized as EN 60974-12
IEC 61032:1997 NOTE Harmonized as EN 61032:1998 (not modified)
IEC 61558-1 NOTE Harmonized as EN 61558-1
IEC 62281 NOTE Harmonized as EN 62281
ISO 13732-1 NOTE Harmonized as EN ISO 13732-1
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 60050-151 - International Electrotechnical Vocabulary - - -
Part 151: Electrical and magnetic devices
IEC 60050-851 - International Electrotechnical Vocabulary - - -
Part 851: Electric welding
IEC 60245-6 - Rubber insulated cables - Rated voltages - -
up to and including 450/750 V -- Part 6: Arc
welding electrode cables
IEC 60417 - Graphical symbols for use on equipment. HD 243 S12 -
Index, survey and compilation of the single
sheets.
Basic and safety principles for man-
IEC 60445 - - -
machine interface, marking and
identification – Identification of equipment
terminals, conductor terminations and
conductors
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems - Part 1:
Principles, requirements and tests
IEC 60664-3 - Insulation coordination for equipment EN 60664-3 -
within low-voltage systems - Part 3: Use of
coating, potting or moulding for protection
against pollution
IEC 60695-11-10 - Fire hazard testing -- Part 11-10: Test EN 60695-11-10 -
flames - 50 W horizontal and vertical flame
test methods
IEC 60974-7 - Arc welding equipment -- Part 7:Torches EN 60974-7 -
IEC 61140 - Protection against electric shock - EN 61140 -
Common aspects for installation and
equipment
IEC 61558-2-4 - Safety of transformers, reactors, power EN 61558-2-4 -
supply units and similar products for supply
voltages up to 1 100 V - Part 2-4: Particular
requirements and tests for isolating
transformers and power supply units
incorporating isolating transformers
IEC 61558-2-6 - Safety of transformers, reactors, power EN 61558-2-6 -
supply units and similar products for supply
voltages up to 1 100 V -- Part 2-6:
Particular requirements and tests for safety
isolating transformers and power supply
units incorporating safety isolating
transformers
IEC 62133-1 - Secondary cells and batteries containing EN 62133-1 -
alkaline or other non-acid electrolytes -
Safety requirements for portable sealed
secondary cells, and for batteries made
from them, for use in portable applications
- Part 1: Nickel systems
IEC 62133-2 - Secondary cells and batteries containing EN 62133-2 -
alkaline or other non-acid electrolytes -
Safety requirements for portable sealed
secondary lithium cells, and for batteries
made from them, for use in portable
applications - Part 2: Lithium systems
ISO 7010 2011 Graphical symbols - Safety colours and EN ISO 7010 2012
safety signs - Registered safety signs
IEC 60974-1 ®
Edition 5.0 2017-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Arc welding equipment –
Part 1: Welding power sources
Matériel de soudage à l’arc –
Partie 1: Sources de courant de soudage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.160.30 ISBN 978-2-8322-3854-7
– 2 – IEC 60974-1:2017 © IEC 2017
CONTENTS
FOREWORD . 9
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 12
3.1 General terms . 12
3.2 Terms related to battery systems . 21
4 Environmental conditions . 24
5 Tests . 25
5.1 Test conditions . 25
5.2 Measuring instruments . 25
5.3 Conformity of components . 25
5.4 Type tests . 26
5.5 Routine tests. 26
6 Protection against electric shock . 27
6.1 Insulation . 27
6.1.1 General . 27
6.1.2 Clearances . 28
6.1.3 Creepage distances . 30
6.1.4 Insulation resistance . 32
6.1.5 Dielectric strength . 32
6.2 Protection against electric shock in normal service (direct contact) . 34
6.2.1 Protection provided by the enclosure . 34
6.2.2 Capacitors . 34
6.2.3 Automatic discharge of supply circuit capacitors . 35
6.2.4 Isolation of the welding circuit . 35
6.2.5 Welding circuit touch current . 35
6.2.6 Touch current in normal condition . 36
6.3 Protection against electric shock in case of a fault condition (indirect contact)
............................................................................................................................. 37
6.3.1 Protective provisions . 37
6.3.2 Isolation between windings of the supply circuit and the welding circuit . 37
6.3.3 Internal conductors and connections . 37
6.3.4 Additional requirements for plasma cutting systems . 38
6.3.5 Movable coils and cores . 38
6.3.6 Touch current in fault condition . 38
7 Thermal requirements . 39
7.1 Heating test . 39
7.1.1 Test conditions . 39
7.1.2 Tolerances of the test parameters . 39
7.1.3 Duration of test . 40
7.2 Temperature measurement . 40
7.2.1 Measurement conditions . 40
7.2.2 Surface temperature sensor . 40
7.2.3 Resistance . 40
7.2.4 Embedded temperature sensor . 41
7.2.5 Determination of the ambient air temperature . 41
IEC 60974-1:2017 © IEC 2017 – 3 –
7.2.6 Recording of temperatures . 41
7.3 Limits of temperature rise . 41
7.3.1 Windings, commutators and slip-rings . 41
7.3.2 External surfaces . 42
7.3.3 Other components . 43
7.4 Loading test . 43
7.5 Commutators and slip-rings . 44
8 Thermal protection. 44
8.1 General requirements . 44
8.2 Construction . 44
8.3 Location . 44
8.4 Operating capacity . 44
8.5 Operation . 45
8.6 Resetting . 45
8.7 Indication . 45
9 Abnormal operation . 45
9.1 General requirements . 45
9.2 Stalled fan test . 46
9.3 Short circuit test . 46
9.4 Overload test . 47
10 Connection to the supply network . 47
10.1 Supply voltage . 47
10.2 Multi-supply voltage . 47
10.3 Means of connection to the supply circuit . 47
10.4 Marking of terminals . 48
10.5 Protective circuit . 48
10.5.1 Continuity requirement . 48
10.5.2 Type test . 49
10.5.3 Routine test . 49
10.6 Cable anchorage . 50
10.7 Inlet openings . 51
10.8 Supply circuit on/off switching device . 51
10.9 Supply cables . 52
10.10 Supply coupling device (attachment plug) . 52
11 Output . 53
11.1 Rated no-load voltage . 53
11.1.1 Rated no-load voltage for use in environments with increased risk of
electric shock . 53
11.1.2 Rated no-load voltage for use in environments without increased risk of
electric shock . 53
11.1.3 Rated no-load voltage for the use with mechanically held torches with
increased protection for the operator . 53
11.1.4 Rated no-load voltage for special processes for example plasma cutting . 53
11.1.5 Additional requirements . 54
11.1.6 Measuring circuits . 55
11.2 Type test values of the conventional load voltage . 56
11.2.1 Manual metal arc welding with covered electrodes . 56
11.2.2 Tungsten inert gas . 56
11.2.3 Metal inert/active gas and flux cored arc welding . 56
– 4 – IEC 60974-1:2017 © IEC 2017
11.2.4 Submerged arc welding . 56
11.2.5 Plasma cutting . 56
11.2.6 Plasma welding . 56
11.2.7 Plasma gouging . 56
11.2.8 Additional requirements . 56
11.3 Mechanical switching devices used to adjust output . 57
11.4 Welding circuit connections . 57
11.4.1 Protection against unintentional contact . 57
11.4.2 Location of coupling devices . 57
11.4.3 Outlet openings . 57
11.4.4 Three-phase multi-operator welding transformer . 57
11.4.5 Marking . 58
11.4.6 Connections for plasma cutting torches . 58
11.5 Power supply to external devices connected to the welding circuit . 58
11.6 Auxiliary power supply . 58
11.7 Welding cables . 59
12 Control circuits . 59
12.1 General requirement . 59
12.2 Isolation of control circuits . 59
12.3 Working voltages of remote control circuits . 59
13 Hazard reducing device . 60
13.1 General requirements . 60
13.2 Types of hazard reducing devices . 60
13.2.1 Voltage reducing device . 60
13.2.2 Switching device for AC to DC . 60
13.3 Requirements for hazard reducing devices . 60
13.3.1 Disabling the hazard reducing device . 60
13.3.2 Interference with operation of a hazard reducing device . 61
13.3.3 Indication of satisfactory operation . 61
13.3.4 Fail to a safe condition . 61
14 Mechanical provisions . 61
14.1 General requirements . 61
14.2 Enclosure . 61
14.2.1 Enclosure materials . 61
14.2.2 Enclosure strength . 62
14.3 Handling means . 62
14.3.1 Mechanised handling . 62
14.3.2 Manual handling . 62
14.4 Drop withstand . 63
14.5 Tilting stability . 63
15 Rating plate . 63
15.1 General requirements . 63
15.2 Description . 64
15.3 Contents . 65
15.4 Tolerances . 68
15.5 Direction of rotation . 68
16 Adjustment of the output . 68
16.1 Type of adjustment . 68
IEC 60974-1:2017 © IEC 2017 – 5 –
16.2 Marking of the adjusting device . 69
16.3 Indication of current or voltage control . 69
17 Instructions and markings . 70
17.1 Instructions . 70
17.2 Markings . 71
Annex A (informative) Nominal voltages of supply networks . 72
Annex B (informative) Example of a combined dielectric test . 73
Annex C (normative) Unbalanced load in case of AC tungsten inert-gas welding power
sources . 74
C.1 General . 74
C.2 Unbalanced load . 74
C.3 Example for an unbalanced load . 75
Annex D (informative) Extrapolation of temperature to time of shutdown . 76
Annex E (normative) Construction of supply circuit terminals . 77
E.1 Size of terminals . 77
E.2 Connections at the terminals . 77
E.3 Construction of the terminals . 78
E.4 Fixing of the terminals . 78
Annex F (informative) Cross-reference to non-SI units . 79
Annex G (informative) Suitability of supply network for the measurement of the true
r.m.s. value of the supply current . 80
Annex H (informative) Plotting of static characteristics . 81
H.1 General . 81
H.2 Method . 81
H.3 Analysis of the results . 81
Annex I (normative) Test methods for a 10 Nm impact . 82
I.1 Pendulum impact hammer . 82
I.2 Free fall spherical steel weight . 83
Annex J (normative) Thickness of sheet metal for enclosures . 84
Annex K (informative) Examples of rating plates . 87
Annex L (informative) Graphical symbols for arc welding equipment . 94
L.1 General . 94
L.2 Use of symbols . 94
L.2.1 General . 94
L.2.2 Selection of symbols . 94
L.2.3 Size of symbols . 94
L.2.4 Use of colour . 94
L.3 Symbols . 95
L.3.1 General . 95
L.3.2 Letter symbols . 95
L.3.3 Graphical symbols . 96
L.4 Examples of combinations of symbols . 116
L.5 Examples of control panels . 118
Annex M (informative) Efficiency and idle state power measurement . 121
M.1 Measuring efficiency . 121
M.2 Measuring idle state power . 121
Annex N (normative) Touch current measurement in fault condition . 123
– 6 – IEC 60974-1:2017 © IEC 2017
Annex O (normative) Battery-powered welding power sources . 128
O.1 General . 128
O.4 Environmental conditions . 129
O.5 Tests . 129
O.5.1 Test conditions . 129
O.5.3 Conformity of components . 130
O.6 Protection against electric shock . 131
O.6.1 Insulation . 131
O.6.2 Protection against electric shock in normal service . 132
O.7 Thermal requirements . 133
O.7.1 Heating test . 133
O.7.2 Temperature measurement . 134
O.7.4 Loading test . 134
O.7.201 Normal charging of lithium-ion systems . 134
O.8 Thermal protection . 135
O.8.1 General requirements . 135
O.8.4 Operating capacity . 135
O.9 Abnormal operation . 135
O.9.1 General requirements . 135
O.9.2 Stalled fan test . 136
O.9.3 Short circuit test . 136
O.9.4 Overload test . 136
O.9.201 Welding power source – abnormal conditions . 136
O.9.202 Welding circuit components – abnormal conditions . 137
O.9.203 Lithium-ion charging systems − abnormal conditions . 137
O.9.204 Lithium-ion battery short circuit . 138
O.9.205 Batteries other than lithium-ion – overcharging . 139
O.9.206 Battery pack disconnection . 139
O.9.207 General purpose batteries . 139
O.10 Connection to the supply network . 139
O.10.5 Protective circuit . 140
O.10.8 Supply circuit on/off switching device . 140
O.14 Mechanical provisions . 141
O.14.1 General requirements . 141
O.14.2 Enclosure . 141
O.14.4 Drop withstand . 141
O.15 Rating plate . 142
O.15.3 Contents . 142
O.17 Instructions and markings . 144
O.17.1 Instructions . 144
O.17.2 Markings . 145
Bibliography . 146
Figure 1 – Example of insulation configuration for Class I equipment . 28
Figure 2 – Measurement of welding circuit touch current . 36
Figure 3 – Measurement of touch current in normal condition . 36
Figure 4 – Measurement of r.m.s. values . 55
Figure 5 – Measurement of peak values . 55
IEC 60974-1:2017 © IEC 2017 – 7 –
Figure 6 – Principle of the rating plate . 64
Figure B.1 – Combined high-voltage transformers . 73
Figure C.1 – Voltage and current during AC tungsten inert-gas welding . 74
Figure C.2 – Unbalanced voltage during AC tungsten inert-gas welding . 75
Figure C.3 – AC welding power source with unbalanced load . 75
Figure I.1 – Test set-up . 82
Figure K.1 – Single-phase transformer . 87
Figure K.2 – Three-phase rotating frequency converter . 88
Figure K.3 – Subdivided rating plate: single-/three-phase transformer rectifier . 89
Figure K.4 – Engine-generator-rectifier . 90
Figure K.5 – Single-/three-phase inverter type . 91
Figure K.6 – Battery powered welding power source with integral battery . 92
Figure K.7 – Battery powered welding power source with detachable / separable
battery . 93
Figure L.1 – Input voltage power switch . 119
Figure L.2 – Arc force control potentiometer . 119
Figure L.3 – Remote receptacle and selector switches . 119
Figure L.4 – Terminals with inductance selector for MIG/MAG welding. 119
Figure L.5 – Process switch (MMA, TIG, MIG) . 120
Figure L.6 – Selector switch on AC/DC equipment . 120
Figure L.7 – Panel indicator lights (overheat, fault, arc striking, output voltage) . 120
Figure L.8 – Setting pulsing parameters using digital display . 120
Figure N.1 – Measuring network for weighted touch current . 123
Figure N.2 – Diagram for touch current measurement on fault condition at operating
temperature for single-phase connection of appliances other than those of class II . 125
Figure N.3 – Diagram for touch current measurement on fault condition for three-phase
four-wire system connection of appliances other than those of class II . 127
Figure O.1 – Marking of battery voltage class B electric components . 145
Table 1 – Minimum clearances for overvoltage category III . 29
Table 2 – Minimum creepage distances . 31
Table 3 – Insulation resistance . 32
Table 4 – Dielectric test voltages . 33
Table 5 – Minimum distance through insulation . 37
Table 6 – Temperature limits for windings, commutators and slip-rings . 42
Table 7 – Temperature limits for external surfaces . 43
Table 8 – Cross-section of the output short-circuit conductor . 46
Table 9 – Current and time requirements for protective circuits . 49
Table 10 – Minimum cross-sectional area of the external protective copper conductor . 49
Table 11 – Verification of continuity of the protective circuit . 50
Table 12 – Pull. 51
Table 13 – Summary of allowable rated no-load voltages . 54
Table 14 – Hazard reducing device requirements . 60
– 8 – IEC 60974-1:2017 © IEC 2017
Table E.1 – Range of conductor dimensions to be accepted by the supply circuit
terminals . 77
Table F.1 – Cross-reference for mm to American wire gauge (AWG) . 79
Table I.1 – Angle of rotation θ to obtain 10 Nm impact . 82
Table I.2 – Mass of the free fall weight and height of the free fall . 83
Table J.1 – Minimum thickness of sheet metal for steel enclosures . 85
Table J.2 – Minimum thickness of sheet metal for enclosures of aluminium, brass or
copper . 86
Table L.1 – Letters used as symbols . 95
IEC 60974-1:2017 © IEC 2017 – 9 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARC WELDING EQUIPMENT –
Part 1: Welding power sources
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 d
...
이 기사는 EN IEC 60974-1:2018에 대해 설명하고 있는데, 이는 아크 용접 장비를 다루는 표준이다. 이 표준은 산업 및 전문적인 사용을 위한 아크 용접 및 관련 공정용 전원원에 적용되며, 전압이 1,000V 이하인 것이거나 기계적 수단에 의해 구동되는 것이다. 이 표준은 용접 전원원과 플라즈마 절단 장치의 안전 및 성능 요구 사항을 명시하고 있다. 이 4판은 2005년에 발행된 3판을 대체하며 기술적 개정으로 구성된다. 이전 판과 비교하여 주요 변경 사항은 다음과 같다. - 가열 시험은 주변 온도 40°C에서 수행되어야한다(5.1 참조). - 새로운 도표 1은 절연 요구 사항의 예를 요약하고 있다. - 오염 정도 4의 애석 거리는 더 이상 유효하지 않다(Table 2 참조). - Class II 장비의 절연 요구 사항이 정의되었다(Table 3 참조). - 절연 시험 전압 보간 제한 하한이 220V로 변경되며 제어 및 용접 회로에 대한 보간이 명확하게 되었다(Table 4 참조). - 물 시험은 시각적 검사의 삭제에 의해 명확해졌다 (6.2.1 참조). - 공급 회로 및 용접 회로의 절연 요구 사항이 정상 서비스시 전기적 충격에 대한 보호로 이전되었다(6.2.4 참조). - 정상 서비스 및 단일 결함 조건에서의 접지 전류 요구 사항이 변경되었다 (6.2.5, 6.2.6 및 6.3.6 참조). - 절연 시스템의 최대 온도는 IEC 60085의 최신 판에 따라 검토되었다(Table 6 참조). - 외부 표면의 온도 상승 제한은 ISO 13732-1에서 정의된 의도하지 않은 접촉 기간에 따라 업데이트되었다(Table 7 참조). - 부하 시험은 절연 시험으로 보완되었다(7.4 참조). - 공급 전압 변동에 대한 허용성 준거 시험이 명확히 되었다(10.1 참조). - 단자 표시는 외부 보호 도체와 3상 장비 단자로 제한되었다 (10.4 참조). - 위험 감소 장치의 사용이 명확화되었다(11.1 참조). - 제어 회로에 대한 요구 사항이 변경되었다(Clause 12 참조). - 충격 시험이 명확히 되었다(14.2.2 참조). - 환경 매개 변수가 보완되었다(부록 M 참조).
この記事は、EN IEC 60974-1:2018について説明しています。これは、アーク溶接機器に対する標準であり、産業およびプロフェッショナルな使用を目的としたものであり、電圧が1,000 V以下であるか、機械的手段によって駆動されるものに適用されます。この標準は、溶接電源およびプラズマ切断システムの安全性と性能要件を規定しています。この第4版は、2005年に出版された第3版を取り消し、改訂版となります。前版と比較して、主な変更点は以下のとおりです。 - 加熱試験は、周囲温度40°Cで行う必要があります（5.1を参照）。 - 新しい図1は、絶縁要件の例を要約しています。 - 汚染度4に対するクリープ距離はもはや有効ではありません（表2参照）。 - Class II機器の絶縁要件が定義されています（表3参照）。 - 誘電試験電圧の補間制限下限が220Vに変更され、制御および溶接回路の補間が明確化されました（表4参照）。 - 水の試験は、視覚的検査の削除により明確化されています（6.2.1を参照）。 - 通常のサービスでの絶縁回路と溶接回路の絶縁要件が感電保護に移されました（6.2.4を参照）。 - 通常のサービスおよび単一障害条件下でのタッチ電流の要件が変更されました（6.2.5、6.2.6、および6.3.6を参照）。 - 絶縁システムの最高温度は、IEC 60085の最新版に基づいて見直されました（表6を参照）。 - 外部表面の温度上昇制限は、ISO 13732-1で定義された意図しない接触期間に応じて更新されました（表7を参照）。 - 負荷テストに絶縁試験が追加されました（7.4を参照）。 - 電圧変動に対する許容試験の一致性は明確化されました（10.1を参照）。 - 端子のマーキングは、外部保護導体と三相機器の端子に制限されます（10.4を参照）。 - ハザード低減装置の使用について明確にされました（11.1を参照）。 - 制御回路の要件が変更されました（12節を参照）。 - 衝撃試験が明確化されました（14.2.2を参照）。 - 環境パラメータが補完されました（付録Mを参照）。
The article discusses EN IEC 60974-1:2018, which is a standard that applies to arc welding equipment and power sources used in industrial and professional settings. The standard specifies safety and performance requirements for these power sources and plasma cutting systems. This fourth edition of the standard includes several changes, such as specifying the heating test temperature, updating insulation and creepage distance requirements, defining insulation requirements for Class II equipment, clarifying dielectric test voltage interpolation restrictions, and updating temperature limits for insulation systems. Other updates include changes to touch current requirements, temperature rise limits for external surfaces, and the addition of a dielectric test to the loading test. The standard also clarifies the marking of terminals, the usage of hazard reducing devices, requirements for control circuits, and the impact test. Environmental parameters are also provided in an annex.
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