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 
1000 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 1000 V are given in Table 1 of IEC 60038:2009. 
NOTE 3 This document does not include electromagnetic compatibility (EMC) requirements.dition 5.1 2019-01 CONSOLIDATED VERSION VERSION CONSOLIDéE colour inside Arc welding equipment – Part 1: Welding power sources Matériel de soudage à l’arc – Partie 1: Sources de courant de soudage IEC 60974-1:2017-02+AMD1:2019-01 CSV(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright ？ 2019 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publica