Voltage Reducing Device (Vrd); Dirt Filter - EWM Pico 180 Operating Instructions Manual

5.8

Voltage reducing device (VRD)

The signal light (VRD open circuit voltage reduction) indicates when the voltage reduction device has
been activated. This then ensures that the open circuit voltage between the electrode holder and the
workpiece is reduced to the permissible values.
The voltage reducing device is a requirement in some countries and in many internal company safety
guidelines for power sources.
5.9

Dirt filter

These accessory components can be retrofitted as an option, see Accessories chapter.
The dirt filter can be used in places with unusually high levels of dirt and dust in the ambient air.
The filter reduces the duty cycle of the welding machine via the reduced flow of cooling air. The
filter must be disassembled and cleaned regularly depending on the level of dirt (blow out with
compressed air).
• As shown in the diagram, insert the dirt filter into the rear of the machine, above the air inlet, using
both clips (1).
• Fold down the dirt filter (2).
• Fasten the dirt filter to the underside of the machine (3) using fixing screws.
099-002003-EW501
19.09.2011
Design and function
NOTE
Figure 5-11
Voltage reducing device (VRD)
29