Kemppi Pro Evolution 3200 - Manual (Page 11)

Kemppi pro evolution 300, 400, 500, 300 mvu, 400 mvu, 500 mvu / 0617 – 11 © Kemppi oy
U
2
=20V+0,04xI
2
U
2
U
U
2
I
2
I
2
Point to point welding
Point to point welding is necessary then when the seam to be welded does not withstand heat of
continuous arc and welding has to be carried out by interrupting arc. The reason is usually thin
materials or variable fittings.
The machine has characteristic curve which makes interrupting of arc easier when electrode is
drawn further from seam.
6. maIntenance
The amount of use and the working environment shoud be taken into consideration when
planning the frequency of maintenance of the machine. Careful use and preventive maintenance
will help to ensure trouble-free operation.
6.1. cables
Check the condition of welding and connection cables daily. Do not use damaged cables.
Make sure that the mains cables in use are safe and according to laid down regulations.
The repair and mounting of a mains connection cables should be carried out only by an
authorized electrician.
Carbon arc gouging
In carbon arc gouging there are dynamic constant voltage curves. If the tip gouging carbon
makes a short circuit, the power source will make an strong increase to the current, the short
circuit ends rapidly and the arc will remain or reignite easier.
5. coolIng unIt supply
1~230 v / 250 va
Kemppi Pro Evolution 4200 and 5200 power sources have as stardard a by productive earthed
outlet X16 isolated safety transformer. Procool cooling unit is connected to this outlet.
U is limited below max. voltage
of machine
statically constant current
dynamically constant voltage