Voltage Reduction Device (Somente Variações Vrd); General; Safety Principle; Vrd Display - Fronius TransPocket 2500 Comfort Operating Instructions Manual

Voltage Reduction Device (somente variações VRD)

General

A Voltage Reduction Device (VRD) is an optional safety device for reducing the voltage.
As far as possible, VRD prevents output voltages at the current sockets that may pose a
danger to persons.

Safety principle

VRD is active
VRD is not active
IMPORTANT!
Within 0.
3 seconds of the end of welding:
► VRD is active again
► The output voltage is limited to 12 V again

VRD display

With VRD variants, the display indicates whether the VRD option is active or not:
Welding circuit resistance is greater than
the minimum human body resistance (grea-
ter than or equal to 200 Ohm):
- VRD is active
- Open circuit voltage is limited to 12 V
(otherwise 90 V)
- There is no risk in unintentionally tou-
ching both welding sockets at the
same time
Welding circuit resistance is less than the
minimum human body resistance (less than
200 Ohm):
- VRD is inactive
- Output voltage not restricted in order to
ensure sufficient welding power
- Example: Start of welding
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