1、 IEC 60974-4 Edition 3.0 2016-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 4: Periodic inspection and testing Matriel de soudage larc Partie 4: Inspection et essais priodiques IEC 60974-4:2016-07(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva,
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19、-nous: csciec.ch. IEC 60974-4 Edition 3.0 2016-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 4: Periodic inspection and testing Matriel de soudage larc Partie 4: Inspection et essais priodiques INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNAT
20、IONALE ICS 25.160 ISBN 978-2-8322-3528-7 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous
21、 avez obtenu cette publication via un distributeur agr. 2 IEC 60974-4:2016 IEC 2016 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 insp
22、ection 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 . 9 5.4 Welding circuit touch current . 9 5.5 Touch current in normal condition 10 5.6 P
23、rotective conductor current 10 5.7 No-load voltage (U 0 ) . 11 6 Functional test . 12 6.1 Function 12 6.2 Supply-circuit on/off switching device 12 6.3 Voltage-reducing device 12 6.4 Magnetic gas valve . 13 6.5 Signal and control lamps . 13 7 Documentation 13 7.1 Test report 13 7.2 Labelling . 13 An
24、nex 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 welding circuit touch current 9 Figure 2 Measurement of touch current in
25、 normal condition . 10 Figure 3 Principles of protective conductor current measurement for single phase equipment 11 Figure 4 Measurement of peak values 12 Table 1 Test sequence on used arc welding equipment . 8 Table 2 Insulation resistance 9 IEC 60974-4:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNIC
26、AL 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
27、 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 (he
28、reafter 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 p
29、articipate 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
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33、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
34、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 indir
35、ect, 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
36、 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 prepa
37、red by IEC technical committee 26: Electric welding. This third edition cancels and replaces the second edition published in 2010. It constitutes a technical revision. The main significant technical changes with respect to the previous edition are the following: With regard to basic standards the te
38、rm “leakage current“ has been replaced by “touch current“ and “protective conductor current“. Measurements of circuits connected in a non-galvanic way shall be tested according to the information of the manufacturer. The order of the chapters dealing with measurements to be carried out has been chan
39、ged. The example test report in Annex B has been adapted. 4 IEC 60974-4:2016 IEC 2016 The text of this standard is based on the following documents: FDIS Report on voting 26/597/FDIS 26/603/RVD Full information on the voting for the approval of this standard can be found in the report on voting indi
40、cated 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 60974 series, under the general title Arc welding equipment, can be found on the IEC website. In this standard, the following print types are used: conf
41、ormity statements: in italic type. 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 reconfir
42、med, withdrawn, replaced by a revised edition, or amended. IEC 60974-4:2016 IEC 2016 5 ARC WELDING EQUIPMENT Part 4: Periodic inspection and testing 1 Scope This part of IEC 60974 specifies test procedures for periodic inspection and, after repair, to ensure electrical safety. These test procedures
43、are also applicable for maintenance. This standard is applicable to power sources for arc welding and allied processes designed in accordance with IEC 60974-1 or IEC 60974-6. Stand-alone ancillary equipment designed in accordance with other parts of IEC 60974 may be tested in accordance with relevan
44、t requirements of this part of IEC 60974. NOTE 1 The welding power source can be tested with any ancillary equipment fitted that can affect the test results. This standard is not applicable to testing of new power sources or engine-driven power sources. NOTE 2 For a power source not built in accorda
45、nce with IEC 60974-1, see Annex C. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the refer
46、enced document (including any amendments) applies. IEC 60050-151, International Electrotechnical Vocabulary Part 151: Electrical and magnetic devices IEC 60050-195, International Electrotechnical Vocabulary Part 195: Earthing and protection against electric shock IEC 60050-851, International Electro
47、technical Vocabulary Part 851: Electric welding IEC 60974-1:2012, Arc welding equipment Part 1: Welding power sources IEC 60974-6, Arc welding equipment Part 6: Limited duty equipment IEC 61557-4, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for
48、 testing, measuring or monitoring of protective measures Part 4: Resistance of earth connection and equipotential bonding IEC 61140, Protection against electric shock Common aspects for installation and equipment 3 Terms and definitions For the purposes of this document, the terms and definitions gi
49、ven in the IEC 60050-151, the IEC 60050-195, the IEC 60050-851, the IEC 60974-1, as well as the following, apply. 6 IEC 60974-4:2016 IEC 2016 3.1 expert competent person skilled person a person who can judge the work assigned and recognize possible hazards on the basis of professional training, knowledge, experience and knowledge of the relevant equipment Note 1 to entry: Several years of practice
