HBS 93-10-0702A, Operating Manual, Page: 21 / 78

ARC 800 Order No. BA 93-10-0702A Issue 01.03.08 21
4 Function
In this chapter you learn more about the design of the power unit and how to
use the various setting options.
4.1 Components of the Power Unit
4.1.1 Power Unit
The power unit consists of the main assemblies
1 -
Solid-State-Relais 2 - Transformer
3 - Rectifier 4 - Control unit
Mains alternating current is transformed in the transformer (2) and converted in the
rectifier (3).
4.1.2 Control Unit
The control unit synchronizes the mechanical sequence (lifting the welding element)
with the electronic control (ignition of pilot arc, ignition of main arc, sequence of welding
time). The welding time is stepless adjustable.