Design and function
Voltage reducing device
099-000235-EW501
17.12.2020
27
ActivArc welding is not possible in combination with the foot-operated remote control.
Figure 5-13
Symbol
Meaning
Actuate foot-operated remote control (start welding process)
Operate foot-operated remote control (set welding current according to applica-
tion)
Release foot-operated remote control (end welding process)
5.4.8 RTAC1 19POL
Suitable for machines with AC welding type only.
Functions
• Infinitely adjustable welding current (0% to 100%) depending on the preselected
main current on the welding machine.
• AC frequency of welding current infinitely adjustable.
• AC balance (positive/negative half-wave ratio) can be set from +15% to -15%.
5.4.9 RT PWS1 19POL
Suitable for machines with AC welding type only.
Functions
• Infinitely adjustable welding current (0% to 100%) depending on the preselected
main current at the welding machine
• Pole reversing switch, suitable for machines with PWS function
5.5 Voltage reducing device
Only machine variants with the (VRD/SVRD/AUS/RU) code are equipped with a voltage reduction device
(VRD). The VRD is used for increased safety, especially in hazardous environments such as shipbuilding,
pipe construction or mining.
A VRD is mandatory in some countries and required by many on-site safety instructions for power
sources.
The VRD signal light is illuminated when the voltage reduction device is operating without fault and the
output voltage is reduced to a value specified in the relevant standard (see technical data).
