IEC 60974-1:2017

FOREWORD
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 AC 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 and idle state
power measurement
Annex N (normative) - Touch current measurement
        in fault condition
Annex O (normative) - Battery-powered welding power
        sources
Bibliography

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.
This fifth edition cancels and replaces the fourth edition published in 2012 and constitutes a technical revision.
The significant changes with respect to the previous edition are the following:
– improvement of Figure 1 (6.1.1);
– modification of Table 3 (6.1.4);
– description of energy efficiency measurements in Annex M;
– inclusion of battery supplied welding power sources in the scope. Requirements therefore are described in Annex O.