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BS EN IEC 60974-1:2021 – TC:2023 Edition

BS EN IEC 60974-1:2021 – TC:2023 Edition

$280.87

Tracked Changes. Arc welding equipment – Welding power sources

Published By Publication Date Number of Pages
BSI 2023 385
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This part of IEC 60974 is applicable to power sources for arc welding and allied processes designed for INDUSTRIAL AND PROFESSIONAL USE, and supplied by a voltage not exceeding 1 000 V, BATTERY supplied or driven by mechanical means. This document specifies safety and performance requirements of WELDING POWER SOURCES and PLASMA CUTTING SYSTEMS. This document is not applicable to limited duty arc welding and cutting power sources which are designed mainly for use by laymen and designed in accordance with IEC 60974-6. This document includes requirements for battery-powered WELDING POWER SOURCES and BATTERY packs, which are given in Annex O. This document is not applicable to testing of power sources during periodic maintenance or after repair. NOTE 1 Typical allied processes are electric arc cutting and arc spraying. NOTE 2 AC systems having a nominal voltage between 100 V and 1 000 V are given in Table 1 of IEC 60038:2009. NOTE 3 This document does not include electromagnetic compatibility (EMC) requirements.

PDF Catalog

PDF Pages PDF Title
1 30467315
224 A-30393228
225 undefined
227 European foreword
Endorsement notice
229 Blank Page
230 English
CONTENTS
235 FOREWORD 
237 1 Scope 
2 Normative references 
238 3 Terms and definitions 
239 Tables
Table 1 – Alphabetical list of terms
240 3.1 General terms  and definitions
249 3.2 Terms and definitions related to battery systems 
251 3.3 Terms and definitions related to efficiency and idle state power measurement 
253 4 Environmental conditions 
5 Tests 
5.1 Test conditions 
5.2 Measuring instruments 
254 5.3 Conformity of components 
Figure 1 – Flow chart for conformity methods of 5.3 
255 5.4 Type tests 
5.5 Routine tests 
Figures
256 6 Protection against electric shock 
6.1 Insulation 
257 Figure 2 – Example of insulation configuration for Class I equipment 
258 Table 2 – Minimum clearances for overvoltage category III
260 Table 3 – Minimum creepage distances
261 Table 4 – Insulation resistance
262 Table 5 – Dielectric test voltages
263 6.2 Protection against electric shock in normal service (direct contact) 
265 Figure 3 – Measurement of welding circuit touch current 
Figure 4 – Measurement of touch current in normal condition  
266 6.3 Protection against electric shock in case of a fault condition (indirect contact) 
Table 6 – Minimum distance through insulation
268 7 Thermal requirements 
7.1 Heating test 
269 7.2 Temperature measurement 
271 7.3 Limits of temperature rise 
Table 7 – Temperature limits for windings, commutators and slip-rings
272 7.4 Loading test 
Table 8 – Temperature limits for external surfaces
273 7.5 Commutators and slip-rings 
8 THERMAL PROTECTION
8.1 General requirements 
8.2 Construction 
8.3 Location 
274 8.4 Operating capacity 
8.5 Operation 
8.6 Resetting 
8.7 Indication 
9 Abnormal operation 
9.1 General requirements 
275 9.2 Stalled fan test 
9.3 Short circuit test 
Table 9 – Cross-section of the output short-circuit conductor
276 9.4 Overload test 
9.5 Capacitors short circuit 
10 Connection to the supply network 
10.1 Supply voltage 
277 10.2 Multi-supply voltage 
10.3 Means of connection to the supply circuit 
10.4 Marking of terminals 
278 Table 10 – Current and time requirements for protective circuits
279 10.6 Cable anchorage 
Table 11 – Minimum cross-sectional area of the external protective copper conductor
Table 12 – Verification of continuity of the protective circuit
280 10.7 Inlet openings 
10.8 Supply circuit on/off switching device 
Table 13 – Pull
281 10.9 Supply cables 
282 10.10 Supply coupling device (attachment plug) 
11 Output 
11.1 Rated no-load voltage  
284 Figure 5 – Measurement of RMS values 
Table 14 – Summary of allowable rated no-load voltages
285 11.2 Type test values of the conventional load voltage 
Figure 6 – Measurement of peak values 
286 11.3 Mechanical switching devices used to adjust output 
287 11.4 Welding circuit connections 
288 11.5 Power supply to external devices connected to the welding circuit 
11.6 Auxiliary power supply 
11.7 Welding cables 
289 12 Control circuits 
12.1 General requirement 
12.2 Isolation of control circuits 
12.3 Working voltages of remote control circuits 
13.1 General requirements 
290 13 HAZARD REDUCING DEVICE
13.2 Types of hazard reducing devices 
13.3 Requirements for hazard reducing devices 
Table 15 – Hazard reducing device requirements
291 14 Mechanical provisions 
14.1 General requirements 
14.2 Enclosure 
292 14.3 Handling means 
14.4 Drop withstand 
293 14.5 Tilting stability 
15.1 General requirements 
15.2 Description 
294 15 RATING PLATE
15.3 Contents 
Figure 7 – Principle of the rating plate  
297 15.4 Tolerances 
298 15.5 Direction of rotation 
16 Adjustment of the output 
16.1 Type of adjustment 
16.2 Marking of the adjusting device 
299 16.3 Indication of current or voltage control 
17 Instructions and markings 
17.1 Instructions 
300 17.2 Markings 
301 Annexes
Annex A (normative) Nominal voltages of supply networks 
Table A.1 – Nominal voltages for supply networks with protective overvoltage control
302 Table A.2 – Single-phase three-wire or two-wire AC or DC systems
303 Table A.3 – Three-phase four-wire or three-wire AC systems
304 Annex B (informative) Example of a combined dielectric test 
Figure B.1 – Combined high-voltage transformers 
305 Annex C (normative) Unbalanced load in case of AC tungsten inert-gas welding power sources 
C.1 General 
Figure C.1 – Voltage and current during AC tungsten inert-gas welding 
306 C.2 Unbalanced load 
C.3 Example for an unbalanced load 
Figure C.2 – Unbalanced voltage during AC tungsten inert-gas welding 
307 Figure C.3 – AC welding power source with unbalanced load 
308 Annex D (informative) Extrapolation of temperature to time of shutdown 
309 Annex E (normative) Construction of supply circuit terminals 
E.1 Size of terminals 
E.2 Connections at the terminals 
Table E.1 – Range of conductor dimensions to be accepted by the supply circuit terminals
310 E.3 Construction of the terminals 
E.4 Fixing of the terminals 
311 Annex F (informative) Cross-reference to non-SI units 
Table F.1 – Cross-reference for mm2 to American wire gauge (AWG)
312 Annex G (informative) Suitability of supply network for the measurement of the true RMS value of the supply current 
313 Annex H (informative) Plotting of static characteristics 
H.1 General 
H.2 Method 
H.3 Analysis of the results 
314 Annex I (normative) Test methods for a 10 Nm impact 
I.1 Pendulum impact hammer 
I.2 Free fall spherical steel weight 
Figure I.1 – Test set-up 
Table I.1 – Angle of rotation ( to obtain 10 Nm impact
315 Table I.2 – Mass of the free fall weight and height of the free fall
316 Annex J (normative) Thickness of sheet metal for enclosures 
Table J.1 – Minimum thickness of sheet metal for steel enclosures
317 Table J.2 – Minimum thickness of sheet metal for enclosures of aluminium, brass or copper
318 Annex K (informative) Examples of rating plates 
Figure K.1 – Single-phase transformer 
319 Figure K.2 – Three-phase rotating frequency converter 
320 Figure K.3 – Subdivided rating plate: single-/three-phase transformer rectifier 
321 Figure K.4 – Engine-generator-rectifier 
322 Figure K.5 – Single-/three-phase inverter type 
323 Figure K.6 – Batterypowered welding power source with integral battery 
324 Figure K.7 – Batterypowered welding power source with detachable / separable battery 
325 Annex L (informative) Graphical symbols for arc welding equipment 
L.1 General 
L.2 Use of symbols 
326 L.3 Symbols 
Table L.1 – Letters used as symbols
344 L.4 Examples of combinations of symbols 
346 L.5 Examples of control panels 
Figure L.1 – Input voltage power switch
Figure L.2 – Arc force control potentiometer
Figure L.3 – Remote receptacle and selector switches
347 Figure L.4 – Terminals with inductance selector for MIG/MAG welding
Figure L.5 – Process switch (MMA, TIG, MIG)
Figure L.6 – Selector switch on AC/DC equipment
Figure L.7 – Panel indicator lights (overheat, fault, arc striking, output voltage)
348 Figure L.8 – Setting pulsing parameters using digital display
349 Annex M (informative) Efficiency and idle state power measurement 
M.1 General conditions for measurement 
350 M.2 Measurements 
Table M.1 – Typical nominal electricity supply details for some regions
351 Table M.2 – Load conditions for the arc welding power source
353 M.3 Test report 
Figure M.1 – Measurement procedure  
354 Table M.3 – Required reported data (measured and calculated)
355 M.4 Test report template
357 Annex N (normative) Touch current measurement  
Figure N.1 – Measuring network, touch current weighted for perception or startlereaction 
358 Figure N.2 – Measuring network, touch current weighted for letgo-immobilization  
360 Figure N.3 – Diagram for touch current measurement on fault condition at operating temperature for single-phase connection of appliances other than those of class II 
362 Figure N.4 – Diagram for touch current measurement on fault condition for three-phase four-wire system connection of appliances other than those of class II 
363 Annex O (normative) Battery-powered welding power sources 
O.1 General 
364 O.4 Environmental conditions 
O.5 Tests 
366 O.6 Protection against electric shock 
368 O.7 Thermal requirements 
370 O.8 Thermal protection 
O.9 Abnormal operation 
374 O.10 Connection to the supply network 
376 O.14 Mechanical provisions 
377 O.15 Rating plate 
379 O.17 Instructions and markings 
380 Figure O.1 – Marking of battery voltage class B electric components 
381 Bibliography 

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BS EN IEC 60974-1:2021 - TC
$280.87