EN 60974-4:2011

SLOVENSKI STANDARD
01-maj-2011
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SIST EN 60974-4:2007
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Arc welding equipment - Part 4: Periodic inspection and testing (IEC 60974-4:2010)
Lichtbogenschweißeinrichtungen - Teil 4: Wiederkehrende Inspektion und Prüfung (IEC
60974-4:2010)
Matériel de soudage à l'arc - Partie 4: Inspection et essais périodiques (CEI 60974-
4:2010)
Ta slovenski standard je istoveten z: EN 60974-4:2011
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 60974-4
NORME EUROPÉENNE
March 2011
EUROPÄISCHE NORM
ICS 25.160 Supersedes EN 60974-4:2007

English version
Arc welding equipment -
Part 4: Periodic inspection and testing
(IEC 60974-4:2010)
Matériel de soudage à l'arc -  Lichtbogenschweißeinrichtungen -
Partie 4: Inspection et essais périodiques Teil 4: Wiederkehrende Inspektion und
(CEI 60974-4:2010) Prüfung
(IEC 60974-4:2010)
This European Standard was approved by CENELEC on 2011-01-02. 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, Croatia, 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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60974-4:2011 E
Foreword
The text of document 26/422/FDIS, future edition 2 of IEC 60974-4, prepared by IEC TC 26, Electric
welding, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60974-4 on 2011-01-02.
This European Standard supersedes EN 60974-4:2007.
The main significant technical changes with respect to EN 60974-4:2007 are the following:
– title is amended;
– scope is extended to equipment designed in accordance with EN 60974-6;
– complementary instructions from the manufacturer shall be followed;
– qualification of test personnel is clarified (see 4.1);
– plasma cutting power sources are excluded from no-load voltage test (see 5.6);
– voltage reducing device functional test is simplified (see 6.3);
– supply voltage is recorded in test report (see 7.1).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-10-02
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-02
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60974-4:2010 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60974-4:2011
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

IEC 60050-151 - International Electrotechnical Vocabulary - -
(IEV) -
Part 151: Electrical and magnetic devices

IEC 60050-195 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 195: Earthing and protection against
electric shock
IEC 60050-851 - International Electrotechnical Vocabulary - - -
Part 851: Electric welding
IEC 60974-1 2005 Arc welding equipment - EN 60974-1 2005
Part 1: Welding power sources
IEC 60974-6 - Arc welding equipment - EN 60974-6 -
Part 6: Limited duty equipment

IEC 61557-4 - Electrical safety in low voltage distribution EN 61557-4 -
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 4: Resistance of earth connection and
equipotential bonding
IEC 60974-4 ®
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 4: Periodic inspection and testing

Matériel de soudage à l’arc –
Partie 4: Inspection et essais périodiques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
P
CODE PRIX
ICS 25.160 ISBN 978-2-88912-158-8
– 2 – 60974-4 © IEC:2010
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms and definitions .5
4 General requirements .6
4.1 Qualification of test personnel .6
4.2 Test conditions.6
4.3 Measuring instruments .6
4.4 Periodic inspection and test.7
4.5 Maintenance.7
4.6 Repair .7
4.7 Test sequence.7
5 Protection against electrical shock.8
5.1 Visual inspection .8
5.2 Continuity of the protective circuit.8
5.3 Insulation resistance .8
5.4 Welding circuit leakage current.8
5.5 Primary leakage current .9
5.6 No-load voltage (U ) .11
6 Functional test.11
6.1 Function .11
6.2 Supply-circuit on/off switching device .12
6.3 Voltage-reducing device .12
6.4 Magnetic gas valve.12
6.5 Signal and control lamps .12
7 Documentation .12
7.1 Test report .12
7.2 Labelling .13
Annex A (informative) Check-list for the visual inspection .14
Annex B (informative) Example of a test report after repair .15
Annex C (informative) Equipment not built in accordance with IEC 60974-1.16

Figure 1 – Measurement of leakage current of welding circuit .9
Figure 2 – Measuring network for primary leakage current .10
Figure 3 – Principles of primary leakage current measurement for single phase
equipment.10
Figure 4 – Measurement of peak values.11

Table 1 – Test sequence on used arc welding equipment .7
Table 2 – Insulation resistance .8

60974-4 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARC WELDING EQUIPMENT –
Part 4: Periodic inspection and testing

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
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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 60974-4 has been prepared by IEC technical committee 26:
Electric welding.
This second edition cancels and replaces the first edition published in 2006. It constitutes a
...