1、 IEC 60974-1 Edition 5.0 2017-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 1: Welding power sources Matriel de soudage larc Partie 1: Sources de courant de soudage IEC 60974-1:2017-02(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva
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19、ez-nous: csciec.ch. IEC 60974-1 Edition 5.0 2017-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 1: Welding power sources Matriel de soudage larc Partie 1: Sources de courant de soudage INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS
20、 25.160.30 ISBN 978-2-8322-3854-7 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 avez o
21、btenu cette publication via un distributeur agr. colour inside 2 IEC 60974-1:2017 IEC 2017 CONTENTS FOREWORD . 9 1 Scope 11 2 Normative references 11 3 Terms and definitions 12 3.1 General terms . 12 3.2 Terms related to battery systems 21 4 Environmental conditions . 24 5 Tests . 25 5.1 Test condit
22、ions . 25 5.2 Measuring instruments 25 5.3 Conformity of components 25 5.4 Type tests . 26 5.5 Routine tests. 26 6 Protection against electric shock . 27 6.1 Insulation 27 6.1.1 General . 27 6.1.2 Clearances 28 6.1.3 Creepage distances . 30 6.1.4 Insulation resistance 32 6.1.5 Dielectric strength 32
23、 6.2 Protection against electric shock in normal service (direct contact) . 34 6.2.1 Protection provided by the enclosure . 34 6.2.2 Capacitors . 34 6.2.3 Automatic discharge of supply circuit capacitors 35 6.2.4 Isolation of the welding circuit 35 6.2.5 Welding circuit touch current . 35 6.2.6 Touc
24、h current in normal condition 36 6.3 Protection against electric shock in case of a fault condition (indirect contact). 37 6.3.1 Protective provisions . 37 6.3.2 Isolation between windings of the supply circuit and the welding circuit . 37 6.3.3 Internal conductors and connections 37 6.3.4 Additiona
25、l requirements for plasma cutting systems . 38 6.3.5 Movable coils and cores 38 6.3.6 Touch current in fault condition 38 7 Thermal requirements 39 7.1 Heating test 39 7.1.1 Test conditions 39 7.1.2 Tolerances of the test parameters . 39 7.1.3 Duration of test 40 7.2 Temperature measurement . 40 7.2
26、.1 Measurement conditions 40 7.2.2 Surface temperature sensor . 40 7.2.3 Resistance 40 7.2.4 Embedded temperature sensor 41 7.2.5 Determination of the ambient air temperature 41 IEC 60974-1:2017 IEC 2017 3 7.2.6 Recording of temperatures 41 7.3 Limits of temperature rise . 41 7.3.1 Windings, commuta
27、tors and slip-rings 41 7.3.2 External surfaces . 42 7.3.3 Other components . 43 7.4 Loading test 43 7.5 Commutators and slip-rings 44 8 Thermal protection. 44 8.1 General requirements . 44 8.2 Construction . 44 8.3 Location 44 8.4 Operating capacity 44 8.5 Operation 45 8.6 Resetting 45 8.7 Indicatio
28、n 45 9 Abnormal operation . 45 9.1 General requirements . 45 9.2 Stalled fan test 46 9.3 Short circuit test 46 9.4 Overload test 47 10 Connection to the supply network 47 10.1 Supply voltage 47 10.2 Multi-supply voltage 47 10.3 Means of connection to the supply circuit 47 10.4 Marking of terminals .
29、 48 10.5 Protective circuit . 48 10.5.1 Continuity requirement . 48 10.5.2 Type test . 49 10.5.3 Routine test . 49 10.6 Cable anchorage . 50 10.7 Inlet openings . 51 10.8 Supply circuit on/off switching device 51 10.9 Supply cables . 52 10.10 Supply coupling device (attachment plug) . 52 11 Output .
30、 53 11.1 Rated no-load voltage . 53 11.1.1 Rated no-load voltage for use in environments with increased risk of electric shock 53 11.1.2 Rated no-load voltage for use in environments without increased risk of electric shock 53 11.1.3 Rated no-load voltage for the use with mechanically held torches w
31、ith increased protection for the operator . 53 11.1.4 Rated no-load voltage for special processes for example plasma cutting . 53 11.1.5 Additional requirements . 54 11.1.6 Measuring circuits . 55 11.2 Type test values of the conventional load voltage . 56 11.2.1 Manual metal arc welding with covere
32、d electrodes . 56 11.2.2 Tungsten inert gas . 56 11.2.3 Metal inert/active gas and flux cored arc welding . 56 4 IEC 60974-1:2017 IEC 2017 11.2.4 Submerged arc welding . 56 11.2.5 Plasma cutting . 56 11.2.6 Plasma welding . 56 11.2.7 Plasma gouging . 56 11.2.8 Additional requirements . 56 11.3 Mecha
33、nical switching devices used to adjust output 57 11.4 Welding circuit connections . 57 11.4.1 Protection against unintentional contact . 57 11.4.2 Location of coupling devices 57 11.4.3 Outlet openings . 57 11.4.4 Three-phase multi-operator welding transformer 57 11.4.5 Marking . 58 11.4.6 Connectio
34、ns for plasma cutting torches . 58 11.5 Power supply to external devices connected to the welding circuit 58 11.6 Auxiliary power supply 58 11.7 Welding cables . 59 12 Control circuits 59 12.1 General requirement . 59 12.2 Isolation of control circuits 59 12.3 Working voltages of remote control circ
35、uits . 59 13 Hazard reducing device . 60 13.1 General requirements . 60 13.2 Types of hazard reducing devices . 60 13.2.1 Voltage reducing device 60 13.2.2 Switching device for AC to DC . 60 13.3 Requirements for hazard reducing devices 60 13.3.1 Disabling the hazard reducing device 60 13.3.2 Interf
36、erence with operation of a hazard reducing device 61 13.3.3 Indication of satisfactory operation 61 13.3.4 Fail to a safe condition 61 14 Mechanical provisions . 61 14.1 General requirements . 61 14.2 Enclosure . 61 14.2.1 Enclosure materials . 61 14.2.2 Enclosure strength . 62 14.3 Handling means 6
37、2 14.3.1 Mechanised handling . 62 14.3.2 Manual handling 62 14.4 Drop withstand 63 14.5 Tilting stability . 63 15 Rating plate . 63 15.1 General requirements . 63 15.2 Description . 64 15.3 Contents . 65 15.4 Tolerances 68 15.5 Direction of rotation 68 16 Adjustment of the output 68 16.1 Type of adj
38、ustment . 68 IEC 60974-1:2017 IEC 2017 5 16.2 Marking of the adjusting device . 69 16.3 Indication of current or voltage control 69 17 Instructions and markings 70 17.1 Instructions . 70 17.2 Markings . 71 Annex A (informative) Nominal voltages of supply networks . 72 Annex B (informative) Example o
39、f a combined dielectric test . 73 Annex C (normative) Unbalanced load in case of AC tungsten inert-gas welding power sources . 74 C.1 General . 74 C.2 Unbalanced load . 74 C.3 Example for an unbalanced load . 75 Annex D (informative) Extrapolation of temperature to time of shutdown 76 Annex E (norma
40、tive) Construction of supply circuit terminals . 77 E.1 Size of terminals . 77 E.2 Connections at the terminals . 77 E.3 Construction of the terminals 78 E.4 Fixing of the terminals . 78 Annex F (informative) Cross-reference to non-SI units . 79 Annex G (informative) Suitability of supply network fo
41、r the measurement of the true r.m.s. value of the supply current 80 Annex H (informative) Plotting of static characteristics . 81 H.1 General . 81 H.2 Method . 81 H.3 Analysis of the results . 81 Annex I (normative) Test methods for a 10 Nm impact . 82 I.1 Pendulum impact hammer . 82 I.2 Free fall s
42、pherical steel weight 83 Annex J (normative) Thickness of sheet metal for enclosures 84 Annex K (informative) Examples of rating plates 87 Annex L (informative) Graphical symbols for arc welding equipment 94 L.1 General . 94 L.2 Use of symbols . 94 L.2.1 General . 94 L.2.2 Selection of symbols 94 L.
43、2.3 Size of symbols . 94 L.2.4 Use of colour . 94 L.3 Symbols 95 L.3.1 General . 95 L.3.2 Letter symbols . 95 L.3.3 Graphical symbols . 96 L.4 Examples of combinations of symbols . 116 L.5 Examples of control panels . 118 Annex M (informative) Efficiency and idle state power measurement . 121 M.1 Me
44、asuring efficiency . 121 M.2 Measuring idle state power . 121 Annex N (normative) Touch current measurement in fault condition . 123 6 IEC 60974-1:2017 IEC 2017 Annex O (normative) Battery-powered welding power sources . 128 O.1 General . 128 O.4 Environmental conditions 129 O.5 Tests 129 O.5.1 Test
45、 conditions 129 O.5.3 Conformity of components . 130 O.6 Protection against electric shock . 131 O.6.1 Insulation . 131 O.6.2 Protection against electric shock in normal service 132 O.7 Thermal requirements . 133 O.7.1 Heating test . 133 O.7.2 Temperature measurement 134 O.7.4 Loading test . 134 O.7
46、.201 Normal charging of lithium-ion systems 134 O.8 Thermal protection 135 O.8.1 General requirements 135 O.8.4 Operating capacity . 135 O.9 Abnormal operation . 135 O.9.1 General requirements 135 O.9.2 Stalled fan test 136 O.9.3 Short circuit test 136 O.9.4 Overload test . 136 O.9.201 Welding power
47、 source abnormal conditions 136 O.9.202 Welding circuit components abnormal conditions 137 O.9.203 Lithium-ion charging systems abnormal conditions . 137 O.9.204 Lithium-ion battery short circuit 138 O.9.205 Batteries other than lithium-ion overcharging 139 O.9.206 Battery pack disconnection 139 O.9
48、.207 General purpose batteries . 139 O.10 Connection to the supply network . 139 O.10.5 Protective circuit 140 O.10.8 Supply circuit on/off switching device . 140 O.14 Mechanical provisions . 141 O.14.1 General requirements 141 O.14.2 Enclosure 141 O.14.4 Drop withstand 141 O.15 Rating plate 142 O.1
49、5.3 Contents 142 O.17 Instructions and markings . 144 O.17.1 Instructions 144 O.17.2 Markings 145 Bibliography 146 Figure 1 Example of insulation configuration for Class I equipment 28 Figure 2 Measurement of welding circuit touch current . 36 Figure 3 Measurement of touch current in normal condition . 36 Figure 4 Measurement of r.m.s. values 55 Figure 5 Measurement of peak values 55 IEC 60974-1:2017 IEC 2017 7 Figure 6 Principle of t
