18 CD 2301 Order No. BA 92-12-0231A Issue 05.01.10
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
The power unit consists of the following main assemblies:
1 - Transformer 4 - Charging resistor
2 - Rectifier 5 - Welding thyristor
3 - Triac 6 - Capacitor battery
Mains alternating current is converted in the rectifier (2).
Capacitors (6) are continuously adjustable charged by both, the Triac (3) and the
charging resistor (4) and store electrical energy.
The negative pole of the capacitor is connected with the chuck of the welding gun.
The positive pole works as ground connection. It is connected with the work piece by
vice-grips.
4 Function
4.1 Components of the Power Unit
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