CEI EN 60974-1 : 2013

FOREWORD
INTRODUCTION
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
Annex ZA (normative) - Normative references
                       to international publications with
                       their corresponding European
                       publications

Describes the power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding 1000 V, or driven by mechanical means.