1、 IEC 60974-6 Edition 3.0 2015-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 6: Limited duty equipment Matriel de soudage larc Partie 6: Matriel service limit IEC 60974-6:2015-09(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switz
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19、us avez des questions contactez-nous: csciec.ch. IEC 60974-6 Edition 3.0 2015-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 6: Limited duty equipment Matriel de soudage larc Partie 6: Matriel service limit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNI
20、QUE INTERNATIONALE ICS 25.160.30 ISBN 978-2-8322-2898-2 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 a
21、ssurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 IEC 60974-6:2015 IEC 2015 CONTENTS FOREW ORD . 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 5.2 Measuring instruments 10 5.3
22、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 Protection against electric shock in n
23、ormal 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 Protective provisions . 13 6.3.2 Isolatio
24、n 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 requirem ents 15 7.1 Devices for therm
25、al 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 temperature sensor . 16 7.3.3 Resis
26、tance 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 IEC 60974-6:2015 IEC 2015 3 7.4.2 External surfaces . 17 7.4.3 Other components . 17 7.5 L
27、oading 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 Location 19 9.3 Operation 19 10 Abnormal operation . 20
28、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 11.2 Multi supply voltage 21 11.3 Means of connect
29、ion 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 . 22 12.1 Rated no-load voltage . 22 12.1.1 Rated no-
30、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 metal arc welding with covered electrodes . 25 12
31、.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 connections . 26 12.4.1 Protection against unintentional
32、 contact . 26 12.4.2 Location of coupling devices 26 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 Auxiliary power output . 26 12.7 Welding cables . 26 13 Control circuits 2
33、6 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 Tilting stability . 27 16 Auxiliaries 27 16.1 General . 27 16.2 Wire fee
34、der . 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 16.4 Electrode holder 28 16.5 Pressure regulator 28 17 Rating plate .
35、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 19.1.3 Safety instructions . 32 19.2 Markings . 33 Annex A (informati
36、ve) Test probes . 35 Annex B (informative) Examples of rating plates 36 Annex C (informative) Symbols-only precautionary label 37 Bibliograph y 38 Figure 1 Measurement of touch current in fault condition . 14 IEC 60974-6:2015 IEC 2015 5 Figure 2 Measuring network for weighted touch current . 14 Figu
37、re 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 Rating plate 36 Figure C.1 Example of precautionary label for engine driven manual metal
38、 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 requirements for plasma cutting power source 27 6 IEC 60974-6:2015 IEC 2015 INTERNATIO
39、NAL ELECTROTECHNICAL COMMISSION _ ARC WELDING EQUIPMENT Part 6: Limited duty equipment 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 t
40、o 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 International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and G
41、uides (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 this preparatory work. International, governmental and non- governmental organizations liaising with the I
42、EC also participate 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
43、 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 the form of recommendations for international use and are accepted by IEC National Committees in that sens
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46、estation 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
47、 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 Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct
48、 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 to the Normative references cited in this publication. Use of the referenced publications is indispensabl
49、e 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 cancels and replaces the second edit
