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BS EN 60974-6:2016

$167.15

Arc welding equipment – Limited duty equipment

Published By Publication Date Number of Pages
BSI 2016 44
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This part of IEC 60974 specifies safety and performance requirements applicable to limited duty arc welding and cutting power sources and auxiliaries designed for use by laymen. Electrically powered equipment is intended to be connected to the single phase public low-voltage supply system. Engine driven power sources cannot exceed output power of 7,5 kVA.

NOTE 1

This equipment is typically used by non-professionals in residential areas.

This part of IEC 60974 is not applicable to arc welding and cutting power sources that require for operation:

  • arc striking and stabilizing devices;

  • liquid cooling systems;

  • gas consoles;

  • three-phase input supply;

and which are intended for industrial and professional use only.

This part of IEC 60974 is not applicable to arc welding and cutting power sources and ancillary equipment used in:

  • mechanically guided applications;

  • submerged arc welding process;

  • plasma gouging process;

  • plasma welding process;

that are covered by other parts of IEC 60974 .

NOTE 2

Power sources, wire feeders, torches and electrode holders designed for industrial and professional use are respectively covered by IEC 60974‑1 , IEC 60974‑5 , IEC 60974‑7 and IEC 60974‑11 .

NOTE 3

This part of IEC 60974 does not specify electromagnetic compatibility (EMC) requirements that are given in IEC 60974‑10 .

PDF Catalog

PDF Pages PDF Title
4 European foreword
Endorsement notice
5 Annex ZA (normative) Normative references to international publications with their corresponding European publications
6 English
CONTENTS
10 FOREWORD
12 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 Environmental conditions
5 Tests
5.1 Test conditions
5.2 Measuring instruments
5.3 Conformity of components
5.4 Type tests
15 5.5 Routine tests
6 Protection against electric shock
6.1 Insulation
6.1.1 General
6.1.2 Clearances
6.1.3 Creepage distances
16 6.1.4 Insulation resistance
6.1.5 Dielectric strength
6.2 Protection against electric shock in normal service (direct contact)
6.2.1 Protection provided by the enclosure
6.2.2 Capacitors
17 6.2.3 Automatic discharge of supply circuit capacitors
6.3 Protection against electric shock in case of a fault condition (indirect contact)
6.3.1 Protective provisions
6.3.2 Isolation between windings of the supply circuit and the welding circuit
6.3.3 Internal conductors and connections
6.3.4 Additional requirements for plasma cutting systems
6.3.5 Movable coils and cores
6.3.6 Touch current in fault condition
18 Figures
Figure 1 – Measurement of touch current in fault condition
Figure 2 – Measuring network for weighted touch current
19 7 Thermal requirements
7.1 Devices for thermal protection and thermal control
7.2 Heating test
7.2.1 Test conditions
7.2.2 Tolerances of the test parameters
7.2.3 Rated maximum welding current
20 7.2.4 Calculation
7.3 Temperature measurement
7.3.1 Measurement condition
7.3.2 Surface temperature sensor
7.3.3 Resistance
7.3.4 Embedded temperature sensor
7.3.5 Determination of the ambient air temperature
21 7.3.6 Recording of temperatures
7.4 Limits of temperature
7.4.1 Windings, commutators and slip-rings
7.4.2 External surfaces
7.4.3 Other components
7.5 Loading test
Tables
Table 1 – Temperature limits according to the class of insulation
22 7.6 Commutators and slip-rings
8 Thermal control device
8.1 Construction
8.2 Location
8.3 Operation
8.4 Resetting
23 8.5 Operating capacity
8.6 Indication
9 Thermal protection
9.1 Construction
9.2 Location
9.3 Operation
24 10 Abnormal operation
10.1 General requirements
10.2 Stalled fan test
10.3 Short circuit test
Table 2 – Maximum temperature limits
25 11 Connection to the input supply network
11.1 Input supply
11.1.1 Supply voltage
11.1.2 Supply current
11.1.3 Engine driven welding power source
11.2 Multi supply voltage
11.3 Means of connection to the supply circuit
11.4 Supply circuit terminals
26 11.5 Cable anchorage
11.6 Inlet openings
11.7 Supply circuit on/off switching device
11.8 Supply cables
11.9 Supply coupling device (attachment plug)
12 Output
12.1 Rated no-load voltage
12.1.1 Rated no-load voltage for arc welding power source
27 12.1.2 Rated no-load voltage for plasma cutting power source
12.1.3 Additional requirements
28 12.1.4 Measuring circuit
Figure 3 – Measurement of r.m.s values
Table 3 – Summary of rated no-load voltages
29 12.2 Type test values of the conventional load voltage
12.2.1 Manual metal arc welding with covered electrodes
12.2.2 Tungsten inert gas arc welding
12.2.3 Metal inert/active gas and flux cored arc welding
12.2.4 Plasma cutting
12.2.5 Additional requirements
Figure 4 – Measurement of peak values
30 12.3 Mechanical switching devices used to adjust output
12.4 Welding circuit connections
12.4.1 Protection against unintentional contact
12.4.2 Location of coupling devices
12.4.3 Outlet openings
12.4.4 Marking
12.4.5 Connections for plasma cutting torches
12.5 Power supply to external devices
12.6 Auxiliary power output
12.7 Welding cables
13 Control circuits
14 Hazard reducing device
31 15 Mechanical provisions
15.1 General requirements
15.2 Enclosure
15.2.1 Enclosure materials
15.2.2 Enclosure strength
15.3 Handling means
15.4 Drop withstand
15.5 Tilting stability
16 Auxiliaries
16.1 General
16.2 Wire feeder
16.2.1 General
16.2.2 Test conditions
Table 4 – Hazard reducing device requirements for plasma cutting power source
32 16.2.3 Thermal requirements
16.2.4 Protection against unintentional contact
16.3 Torch
16.3.1 General
16.3.2 Test conditions
16.3.3 Thermal requirements
16.4 Electrode holder
16.5 Pressure regulator
17 Rating plate
17.1 General requirements
17.2 Description
33 17.3 Contents
Figure 5 – Principle of the rating plate
35 17.4 Tolerances
36 18 Adjustment of the output
19 Instructions and markings
19.1 Instructions
19.1.1 General
19.1.2 Instruction manual
19.1.3 Safety instructions
37 19.2 Markings
39 Annex A (informative) Test probes
Figure A.1 – Test probe 12 of IEC 61032
Figure A.2 – Test probe 13 of IEC 61032
40 Annex B (informative) Examples of rating plates
Figure B.1 – Rating plate
41 Annex C (informative) Symbols-only precautionary label
Figure C.1 – Example of precautionary label for engine driven manual metal arc welding power source
42 Bibliography
BS EN 60974-6:2016
$167.15