This part of IEC 60974 is applicable to power sources with a thermal cut-out device for manual metal arc welding with limited duty.
These welding power sources are mainly used by laymen.
This part of IEC 60974 specifies safety requirements for construction and performance requirements of welding power sources, limited to a rated maximum welding current of 160 A.
This part of IEC 60974 is not applicable to:
— rotating welding power sources;
— welding power sources with remote control;
— welding power sources incorporating frequency conversion.