1、BSI Standards PublicationArc welding equipmentPart 6: Limited duty equipmentBS EN 60974-6:2016National forewordThis British Standard is the UK implementation of EN 60974-6:2016. It isidentical to IEC 60974-6:2015. It supersedes BS EN 60974-6:2011 which iswithdrawn.The UK participation in its prepara
2、tion 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 necessary provisions ofa contract. Users are responsible for its correc
3、t application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 86281 6ICS 25.160.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy
4、Committee on 31 January 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60974-6:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60974-6 January 2016 ICS 25.160.30 Supersedes EN 60974-6:2011 English Version Arc welding equipment - Part 6: Limited du
5、ty equipment (IEC 60974-6:2015) Matriel de soudage larc - Partie 6: Matriel service limit (IEC 60974-6:2015) Lichtbogenschweieinrichtungen - Teil 6: Schweistromquellen mit begrenzter Einschaltdauer (IEC 60974-6:2015) This European Standard was approved by CENELEC on 2015-10-27. CENELEC members are b
6、ound 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
7、 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 Manageme
8、nt 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, Irelan
9、d, 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 Standardization Comit Europen de Normalisation Electrotechnique Europisches Komit
10、ee 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 60974-6:2016 E BS EN 60974-6:2016EN 60974-6:2016 2 European foreword The text of d
11、ocument 26/572/FDIS, future edition 3 of IEC 60974-6, prepared by IEC/TC 26 “Electric welding“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60974-6:2016. The following dates are fixed: latest date by which the document has to be implemented at national level by public
12、ation of an identical national standard or by endorsement (dop) 2016-07-27 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-10-27 This document supersedes EN 60974-6:2011. Attention is drawn to the possibility that some of the elements of this
13、 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. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/E
14、C). This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association. Endorsement notice The text of the International Standard IEC 60974-6:2015 was approved by CENELEC as a European Standard without any modification. In the official
15、 version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60085 NOTE Harmonized as EN 60085. IEC 60127-1 NOTE Harmonized as EN 60127-1. IEC 60269-1 NOTE Harmonized as EN 60269-1. IEC 60974 NOTE Harmonized in EN 60974 series. IEC 61558-1:2005 NOTE Harmonized as
16、 EN 61558-1:2005 (not modified). BS EN 60974-6:2016EN 60974-6:2016 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 document and are indispensable
17、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, indicated by (mod), the relevant EN
18、/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 60529 - Degrees of protection provided by enclosures (IP Code) EN 60529 - IEC 60974-1 2012 Arc welding equipment -
19、 Part 1: Welding power sources EN 60974-1 2012 IEC 60974-5 2013 Arc welding equipment - Part 5: Wire feeders EN 60974-5 2013 IEC 60974-7 2013 Arc welding equipment - Part 7:Torches EN 60974-7 2013 IEC 60974-10 - Arc welding equipment - Part 10: Electromagnetic compatibility (EMC) requirements EN 609
20、74-10 - IEC 60974-11 - Arc welding equipment - Part 11: Electrode holders EN 60974-11 - IEC 61032 1997 Protection of persons and equipment by enclosures - Probes for verification EN 61032 1998 ISO 2503 - Gas welding equipment - Pressure regulators and pressure regulators with flow-metering devices f
21、or gas cylinders used in welding, cutting and allied processes up to 300 bar (30 MPa) EN ISO 2503 - BS EN 60974-6:2016 2 IEC 60974-6:2015 IEC 2015 CONTENTS FOREWORD . 6 1 Scope 8 2 Normative references 8 3 Terms and definitions 9 4 Environmental conditions . 10 5 Tests . 10 5.1 Test conditions . 10
22、5.2 Measuring instruments 10 5.3 Conformity of components 10 5.4 Type tests . 10 5.5 Routine tests. 11 6 Protection against electric shock . 11 6.1 Insulation 11 6.1.1 General . 11 6.1.2 Clearances 11 6.1.3 Creepage distances . 11 6.1.4 Insulation resistance 12 6.1.5 Dielectric strength 12 6.2 Prote
23、ction against electric shock in normal service (direct contact) . 12 6.2.1 Protection provided by the enclosure . 12 6.2.2 Capacitors . 12 6.2.3 Automatic discharge of supply circuit capacitors 13 6.3 Protection against electric shock in case of a fault condition (indirect contact) 13 6.3.1 Protecti
24、ve provisions . 13 6.3.2 Isolation between windings of the supply circuit and the welding circuit . 13 6.3.3 Internal conductors and connections 13 6.3.4 Additional requirements for plasma cutting systems . 13 6.3.5 Movable coils and cores 13 6.3.6 Touch current in fault condition 13 7 Thermal requi
25、rements 15 7.1 Devices for thermal protection and thermal control 15 7.2 Heating test 15 7.2.1 Test conditions 15 7.2.2 Tolerances of the test parameters . 15 7.2.3 Rated maximum welding current 15 7.2.4 Calculation 16 7.3 Temperature measurement . 16 7.3.1 Measurement condition 16 7.3.2 Surface tem
26、perature sensor . 16 7.3.3 Resistance 16 7.3.4 Embedded temperature sensor 16 7.3.5 Determination of the ambient air temperature 16 7.3.6 Recording of temperatures 17 7.4 Limits of temperature 17 7.4.1 Windings, commutators and slip-rings 17 BS EN 60974-6:2016IEC 60974-6:2015 IEC 2015 3 7.4.2 Extern
27、al surfaces . 17 7.4.3 Other components . 17 7.5 Loading test 17 7.6 Commutators and slip-rings 18 8 Thermal control device 18 8.1 Construction . 18 8.2 Location 18 8.3 Operation 18 8.4 Resetting 18 8.5 Operating capacity 19 8.6 Indication 19 9 Thermal protection. 19 9.1 Construction . 19 9.2 Locati
28、on 19 9.3 Operation 19 10 Abnormal operation . 20 10.1 General requirements . 20 10.2 Stalled fan test 20 10.3 Short circuit test 20 11 Connection to the input supply network . 21 11.1 Input supply 21 11.1.1 Supply voltage . 21 11.1.2 Supply current . 21 11.1.3 Engine driven welding power source 21
29、11.2 Multi supply voltage 21 11.3 Means of connection to the supply circuit 21 11.4 Supply circuit terminals . 21 11.5 Cable anchorage . 22 11.6 Inlet openings . 22 11.7 Supply circuit on/off switching device 22 11.8 Supply cables . 22 11.9 Supply coupling device (attachment plug) . 22 12 Output . 2
30、2 12.1 Rated no-load voltage . 22 12.1.1 Rated no-load voltage for arc welding power source 22 12.1.2 Rated no-load voltage for plasma cutting power source . 23 12.1.3 Additional requirements . 23 12.1.4 Measuring circuit . 24 12.2 Type test values of the conventional load voltage . 25 12.2.1 Manual
31、 metal arc welding with covered electrodes . 25 12.2.2 Tungsten inert gas arc welding 25 12.2.3 Metal inert/active gas and flux cored arc welding . 25 12.2.4 Plasma cutting . 25 12.2.5 Additional requirements . 25 12.3 Mechanical switching devices used to adjust output 26 12.4 Welding circuit connec
32、tions . 26 12.4.1 Protection against unintentional contact . 26 12.4.2 Location of coupling devices 26 BS EN 60974-6:2016 4 IEC 60974-6:2015 IEC 2015 12.4.3 Outlet openings . 26 12.4.4 Marking . 26 12.4.5 Connections for plasma cutting torches . 26 12.5 Power supply to external devices 26 12.6 Auxil
33、iary power output . 26 12.7 Welding cables . 26 13 Control circuits 26 14 Hazard reducing device . 26 15 Mechanical provisions . 27 15.1 General requirements . 27 15.2 Enclosure . 27 15.2.1 Enclosure materials . 27 15.2.2 Enclosure strength . 27 15.3 Handling means 27 15.4 Drop withstand 27 15.5 Til
34、ting stability . 27 16 Auxiliaries 27 16.1 General . 27 16.2 Wire feeder . 27 16.2.1 General . 27 16.2.2 Test conditions 27 16.2.3 Thermal requirements 28 16.2.4 Protection against unintentional contact . 28 16.3 Torch 28 16.3.1 General . 28 16.3.2 Test conditions 28 16.3.3 Thermal requirements 28 1
35、6.4 Electrode holder 28 16.5 Pressure regulator 28 17 Rating plate . 28 17.1 General requirements . 28 17.2 Description . 28 17.3 Contents . 29 17.4 Tolerances 31 18 Adjustment of the output 32 19 Instructions and markings 32 19.1 Instructions . 32 19.1.1 General . 32 19.1.2 Instruction manual . 32
36、19.1.3 Safety instructions . 32 19.2 Markings . 33 Annex A (informative) Test probes . 35 Annex B (informative) Examples of rating plates 36 Annex C (informative) Symbols-only precautionary label 37 Bibliography 38 Figure 1 Measurement of touch current in fault condition . 14 BS EN 60974-6:2016IEC 6
37、0974-6:2015 IEC 2015 5 Figure 2 Measuring network for weighted touch current . 14 Figure 3 Measurement of r.m.s values . 24 Figure 4 Measurement of peak values 25 Figure 5 Principle of the rating plate 29 Figure A.1 Test probe 12 of IEC 61032 35 Figure A.2 Test probe 13 of IEC 61032 35 Figure B.1 Ra
38、ting plate 36 Figure C.1 Example of precautionary label for engine driven manual metal arc welding power source . 37 Table 1 Temperature limits according to the class of insulation 17 Table 2 Maximum temperature limits 20 Table 3 Summary of rated no-load voltages . 24 Table 4 Hazard reducing device
39、requirements for plasma cutting power source 27 BS EN 60974-6:2016 6 IEC 60974-6:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ARC WELDING EQUIPMENT Part 6: Limited duty equipment FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardizat
40、ion 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 Internatio
41、nal 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 dealt with may participate in t
42、his 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 conditions determined by agreement between the tw
43、o 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 National Committees. 3) IEC Publications have th
44、e 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 way in which they are used or for any misinter
45、pretation 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 Publication and the corresponding national
46、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. IEC is not responsible for any services carri
47、ed 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 its technical committees and IEC National Comm
48、ittees 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 other IEC Publications. 8) Attention is drawn t
49、o 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 60974-6 has been prepared by IEC technical committee 26: Electric welding. This third edition ca
