Plasma Current Intensity
Plasma arc current intensity is the electrical current of the plasma arc and determines thermal power and cutting capacity.
Physicochemical mechanism of action
The plasma arc current intensity corresponds to the electric current flowing through the plasma arc. This current intensity creates a strong electrolysis of the gas medium, thus forming the plasma-like cutting tool.
Metallurgical relevance & risks when welding
A high plasma arc current intensity increases the thermal power and cutting capacity, which leads to faster machining times. However, it can also lead to an increased risk of gap formation and to a stronger burning of the workpiece surface. Too low a current intensity, on the other hand, reduces the cutting performance and thermal power, which leads to longer machining times and possibly insufficient material processing.
Workshop practice & instructions
The plasma arc current intensity should be set so that it delivers the desired cutting performance and thermal power without being too high. A typical current for steel is 200 to 300 amps. For delicate materials or fine cutting jobs, reduce the current.