BS EN 60974-1:2012

1 Scope
2 Normative references
3 Terms and definitions
4 Environmental conditions
5 Tests
6 Protection against electric shock
7 Thermal requirements
8 Thermal protection
9 Abnormal operation
10 Connection to the supply network
11 Output
12 Control circuits
13 Hazard reducing device
14 Mechanical provisions
15 Rating plate
16 Adjustment of the output
17 Instructions and markings
Annex A (informative) - Nominal voltages of supply
        networks
Annex B (informative) - Example of a combined
        dielectric test
Annex C (normative) - Unbalanced load in case of
        a.c. tungsten inert-gas welding power
        sources
Annex D (informative) - Extrapolation of temperature
        to time of shutdown
Annex E (normative) - Construction of supply circuit
        terminals
Annex F (informative) - Cross-reference to non-SI units
Annex G (informative) - Suitability of supply network
        for the measurement of the true r.m.s.
        value of the supply current
Annex H (informative) - Plotting of static characteristics
Annex I (normative) - Test methods for a 10 Nm impact
Annex J (normative) - Thickness of sheet metal for
        enclosures
Annex K (informative) - Examples of rating plates
Annex L (informative) - Graphical symbols for arc welding
        equipment
Annex M (informative) - Efficiency
Annex N (normative) - Touch current measurement in
        fault condition
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Defines safety and performance requirements of welding power sources and plasma cutting systems.

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, or driven by mechanical means.

This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems.

This part of IEC 60974 is not applicable to welding power sources for manual metal arc welding with limited duty operation which are designed mainly for use by laymen and designed in accordance with IEC 60974-6.

This part of IEC 60974 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 part of IEC 60974 does not include electromagnetic compatibility (EMC) requirements.