1、Arc welding equipmentPart 4: Periodic inspection and testingBS EN 60974-4:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN 60974-4:2016. It isidentical to IEC 60974-4:2016. It supersedes BS EN 6
2、0974-4:2011 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/6, Electric arc welding equipment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necess
3、ary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 88315 6ICS 25.160.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was p
4、ublished under the authority of theStandards Policy and Strategy Committee on 30 November 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60974-4:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60974-4 November 2016 ICS 25.160 Supersedes EN 60974-4
5、:2011 English Version Arc welding equipment - Part 4: Periodic inspection and testing (IEC 60974-4:2016) Matriel de soudage larc - Partie 4: Inspection et essais priodiques (IEC 60974-4:2016) Lichtbogenschweieinrichtungen - Teil 4: Wiederkehrende Inspektion und Prfung (IEC 60974-4:2016) This Europea
6、n Standard was approved by CENELEC on 2016-08-25. 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 c
7、oncerning 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 CENELE
8、C 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 R
9、epublic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardiz
10、ation Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60974-4:201
11、6 E BS EN 60974-4:2016EN 60974-4:2016 2 European foreword The text of document 26/597/FDIS, future edition 3 of IEC 60974-4, prepared by IEC/TC 26 “Electric welding“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60974-4:2016. The following dates are fixed: latest date
12、by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-05-25 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-08-25 This document supersedes EN 60974-4:2011.
13、Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60974-4:2016 was approve
14、d by CENELEC as a European Standard without any modification. BS EN 60974-4:2016EN 60974-4:2016 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this do
15、cument and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indica
16、ted 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 (IEV) - Part 151: Electrical and
17、 magnetic devices - - IEC 60050-195 - International Electrotechnical Vocabulary (IEV) - Chapter 195: Earthing and protection against electric shock - - IEC 60050-851 - International Electrotechnical Vocabulary (IEV) - Part 851: Electric welding - - IEC 60974-1 2012 Arc welding equipment - Part 1: We
18、lding power sources EN 60974-1 2012 IEC 60974-6 - Arc welding equipment - Part 6: Limited duty equipment EN 60974-6 - IEC 61140 - Protection against electric shock - Common aspects for installation and equipment EN 61140 - IEC 61557-4 - Electrical safety in low voltage distribution systems up to 1 0
19、00 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 EN 61557-4 - BS EN 60974-4:2016 2 IEC 60974-4:2016 IEC 2016 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references. 5 3 Terms and defi
20、nitions 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
21、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 Protective conductor current 10 5.7 No-load voltage (U0) . 11 6 Functional test . 12 6.1 Function 12 6.2 Supply-circuit on/off switching device 12 6.3 Voltage-
22、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 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 n
23、ot built in accordance with IEC 60974-1. 16 Figure 1 Measurement of welding circuit touch current 9 Figure 2 Measurement of touch current in normal condition . 10 Figure 3 Principles of protective conductor current measurement for single phase equipment 11 Figure 4 Measurement of peak values 12 Tabl
24、e 1 Test sequence on used arc welding equipment . 8 Table 2 Insulation resistance 9 BS EN 60974-4:2016IEC 60974-4:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ARC WELDING EQUIPMENT Part 4: Periodic inspection and testing FOREWORD 1) The International Electrotechnical Commission (IEC)
25、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 t
26、o 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
27、 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 condi
28、tions 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 Nati
29、onal 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 wa
30、y 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
31、 Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. I
32、EC 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 publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of it
33、s 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 oth
34、er 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
35、 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 third edition cancels and replaces the second edition published in 2010. It constitut
36、es a technical revision. The main significant technical changes with respect to the previous edition are the following: With regard to basic standards the term “leakage current“ has been replaced by “touch current“ and “protective conductor current“. Measurements of circuits connected in a non-galva
37、nic 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 changed. The example test report in Annex B has been adapted. BS EN 60974-4:2016 4 IEC 60974-4:2016 IEC 2016 The text of this standard is based on
38、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 indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The list of a
39、ll 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: conformity statements: in italic type. The committee has decided that the contents of this publication will remain unchanged unt
40、il 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 reconfirmed, withdrawn, replaced by a revised edition, or amended. BS EN 60974-4:2016IEC 60974-4:2016 IEC 2016 5 ARC WELDING EQUIPME
41、NT 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 are also applicable for maintenance. This standard is applicable to power sources for arc welding and alli
42、ed 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 relevant requirements of this part of IEC 60974. NOTE 1 The welding power source can be tested with any ancillary
43、 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 accordance with IEC 60974-1, see Annex C. 2 Normative references The following documents, in whole or in part, ar
44、e 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 referenced document (including any amendments) applies. IEC 60050-151, International Electrotechnical Vocabular
45、y Part 151: Electrical and magnetic devices IEC 60050-195, International Electrotechnical Vocabulary Part 195: Earthing and protection against electric shock IEC 60050-851, International Electrotechnical Vocabulary Part 851: Electric welding IEC 60974-1:2012, Arc welding equipment Part 1: Welding po
46、wer 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 testing, measuring or monitoring of protective measures Part 4: Resistance of earth connection and equipo
47、tential 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 given in the IEC 60050-151, the IEC 60050-195, the IEC 60050-851, the IEC 60974-1, as well as the following,
48、 apply. BS EN 60974-4:2016 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 year
49、s of practice in the relevant technical field may be taken into consideration in assessment of professional training. SOURCE: IEC 60974-1:2012, 3.3 3.2 instructed person person informed about the tasks assigned and about the possible hazards involved in neglectful behaviour Note 1 to entry: If necessary, the person has undergone some training SOURCE: IEC 60974-1:2012, 3.4 3.3 periodic inspection and test examination carried out at specified intervals to
