EN IEC 60974-2:2019
(Main)Arc welding equipment - Part 2: Liquid cooling systems
Arc welding equipment - Part 2: Liquid cooling systems
This part of IEC 60974 specifies safety and construction requirements for industrial and professional LIQUID COOLING SYSTEMS used in arc welding and allied processes to cool torches. This document is applicable to LIQUID COOLING SYSTEMS which are stand-alone (separate from the welding equipment) or built-in (housed in a single enclosure with other welding equipment). This document is not applicable to refrigerated cooling systems. NOTE 1 Typical allied processes are electric arc cutting and arc spraying. NOTE 2 This part of IEC 60974 does not include electromagnetic compatibility (EMC) requirements that are given in IEC 60974-10.
Lichtbogenschweißeinrichtungen - Teil 2: Flüssigkeitskühlsysteme
Matériel de soudage à l’arc - Partie 2: Systèmes de refroidissement par liquide
La présente partie de l'IEC 60974 spécifie les exigences de sécurité et de construction des SYSTEMES DE REFROIDISSEMENT PAR LIQUIDE industriels et professionnels utilisés en soudage à l'arc et les procédés connexes pour refroidir des torches. Le présent document s'applique aux SYSTEMES DE REFROIDISSEMENT PAR LIQUIDE qui sont indépendants (séparés du matériel de soudage) ou incorporés (intégrés dans une seule enveloppe avec d’autres matériels de soudage). Le présent document ne s'applique pas aux systèmes de refroidissement avec réfrigération. NOTE 1 Le coupage à l’arc électrique et la projection à l'arc électrique sont des exemples de procédés connexes typiques. NOTE 2 La présente partie de l’IEC 60974 ne contient pas les exigences de compatibilité électromagnétique (CEM) qui sont données dans l’IEC 60974-10.
Oprema za obločno varjenje - 2. del: Hladilni sistemi s tekočino (IEC 60974-2:2019)
Ta dokument določa varnostne in konstrukcijske zahteve za industrijske ter profesionalne HLADILNE SISTEME S TEKOČINO, ki se uporabljajo pri obločnem varjenju in podobnih postopkih za hlajenje plamena. Ta dokument se uporablja za samostojne HLADILNE SISTEME S TEKOČINO (ločene od opreme za varjenje) ali za vgrajene (v skupnem ohišju z drugo opremo za varjenje). Ta dokument se ne uporablja za ohlajevane hladilne sisteme.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2020
Nadomešča:
SIST EN 60974-2:2013
Oprema za obločno varjenje - 2. del: Hladilni sistemi s tekočino (IEC 60974-2:2019)
Arc welding equipment - Part 2: Liquid cooling systems (IEC 60974-2:2019)
Lichtbogenschweißeinrichtungen - Teil 2: Flüssigkeitskühlsysteme (IEC 60974-2:2019)
Matériel de soudage à l'arc - Partie 2: Systèmes de refroidissement par liquide (IEC
60974-2:2019)
Ta slovenski standard je istoveten z: EN IEC 60974-2:2019
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 60974-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2019
ICS 25.160.30 Supersedes EN 60974-2:2013
English Version
Arc welding equipment - Part 2: Liquid cooling systems
(IEC 60974-2:2019)
Matériel de soudage à l'arc - Partie 2: Systèmes de Lichtbogenschweißeinrichtungen - Teil 2:
refroidissement par liquide Flüssigkeitskühlsysteme
(IEC 60974-2:2019) (IEC 60974-2:2019)
This European Standard was approved by CENELEC on 2019-03-06. 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60974-2:2019 E
European foreword
The text of document 26/670/FDIS, future edition 4 of IEC 60974-2, 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) 2019-12-06
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-03-06
document have to be withdrawn
This document supersedes EN 60974-2:2013.
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 60974-2:2019 was approved by CENELEC as a European
Standard without any modification.
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 60974-1 2017 Arc welding equipment - Part 1: Welding power EN IEC 60974-1 2018
sources
IEC 60974-7 2013 Arc welding equipment - Part 7: Torches EN 60974-7 2013
IEC 60974-10 2014 Arc welding equipment - Part 10: Electromagnetic EN 60974-10 2014
compatibility (EMC) requirements
Annex ZZ
(informative)
Relationship between this European standard and the safety objectives of
Directive 2014/35/EU [2014 OJ L96] aimed to be covered
This European Standard has been prepared under a Commission’s standardization request relating to
harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.
Table ZZ.1 – Correspondence between this European standard and Annex I of Directive
2014/35/EU [2014 OJ L96]
Clause(s) / sub-clause(s)
Safety objectives of Directive
Remarks / Notes
2014/35/EU
of this EN
1(a) Clauses 11, 12.1, 12.2
1(b) Clauses 12.1, 17.1
Testing during periodic
Clauses 1, 3, 4
1(c) maintenance or after repair is
see also points 2 and 3 below
covered in separate standards
Clauses 6.1, 6.2, 6.3, 6.4, 6.5, 7.2,
2(a)
7.3, 12.1 d) and e), 12.2.2, 12.2.3
Hazards arising from electric,
magnetic, and electromagnetic
Clauses 5.3, 6.1, 6.2, 6.3, 7.2, 7.3,
2(b) fields, other ionizing and non-
8.2
ionizing radiation are covered in
separate standards
Clauses 5.4 c), 6.2, 6.4.5, 7.1, 8.3,
2(c)
9.1, 12.1 m)
2(d) Clause 6.1
3(a) Clause 7.1
Functional safety is covered in
separate standards
3(b) Clauses 4, 6.2, 6.4.9, 7.1, 12.1 n)
Safety-related security is
covered in separate standards
3(c) Clause 9
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
IEC 60974-2 ®
Edition 4.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 2: Liquid cooling systems
Matériel de soudage à l’arc –
Partie 2: Systèmes de refroidissement par liquide
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.160.30 ISBN 978-2-8322-6497-3
– 2 – IEC 60974-2:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Environmental conditions . 7
5 Tests . 7
5.1 Test conditions . 7
5.2 Measuring instruments . 7
5.3 Conformity of components . 7
5.4 Type tests . 7
5.5 Routine tests. 7
6 Protection against electric shock . 8
6.1 Insulation . 8
6.1.1 General . 8
6.1.2 Clearances . 8
6.1.3 Creepage distances . 8
6.1.4 Insulation resistance . 8
6.1.5 Dielectric strength . 8
6.2 Protection against electric shock in normal service (direct contact) . 8
6.3 Protection against electric shock in case of a fault condition (indirect
contact) . 8
6.3.1 Protective provisions . 8
6.3.2 Isolation between windings of the supply circuit and the welding circuit . 8
6.3.3 Internal conductors and connections . 8
6.3.4 Touch current in fault condition . 8
6.4 Connection to the supply network . 8
6.4.1 Supply voltage . 8
6.4.2 Multi-supply voltage . 9
6.4.3 Means of connection to the supply circuit . 9
6.4.4 Marking of terminals . 9
6.4.5 Protective circuit . 9
6.4.6 Cable anchorage . 9
6.4.7 Inlet openings . 9
6.4.8 Supply circuit on/off switching device . 9
6.4.9 Supply cables . 9
6.4.10 Supply coupling device (attachment plug) . 9
6.5 Leakage current between welding circuit and protective earth . 9
7 Mechanical provisions . 10
7.1 General . 10
7.2 Cooling liquid overflow . 10
7.3 Hose coupling devices and hose connections . 10
8 Cooling system . 10
8.1 Rated maximum pressure . 10
8.2 Thermal requirements . 11
8.2.1 Heating test . 11
8.2.2 Tolerances of test parameters . 11
IEC 60974-2:2019 © IEC 2019 – 3 –
8.2.3 Duration of test . 11
8.3 Pressure and temperature . 11
9 Abnormal operation . 11
9.1 General requirements . 11
9.2 Stalled test. 12
10 COOLING POWER . 12
11 R
...
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