Welding Machine Output Voltage. The VRD reduces the OCV open circuit voltage at the welding output terminals while not welding to less than 2 volts DC. For GMAW-CV the welder selects the wire feed speed WFS on the wire feeder unit and an appropriate voltage on the welding power supply.
It is proportional to or a result of the WFS. When welding starts the output terminal voltage will be the load voltage arc voltage voltage drop due to cable voltage drop. A transformer -style welding power supply converts the moderate voltage and moderate current electricity from the utility mains typically 230 or 115 VAC into a high current and low voltage supply typically between 17 and 45 open-circuit volts and 55 to 590 amperes.
If it is used for half an hour then power consumed by the welding machine will be 215 kWh.
CiteSeerX - Document Details Isaac Councill Lee Giles Pradeep Teregowda. The welding current at the full-wave rectifier output is normally controlled by the pulse width modulated primary voltage of the transformer supplied by the input converter. Power consumption of a welding machine can be calculated by multiplying wattage of the welding machine by the operational hours. If it is used for half an hour then power consumed by the welding machine will be 215 kWh.