This is a little 6-phase unit I found and refurbished, luckily it was in working condition. Manufactured by "Chirana" in Czechoslovakia. The output parameters are unknown but most likely 600V, 30A. In this video it runs at 20 amps. At first you can see the ignition electrode operation and auxiliary circuit running (3 small anodes). Then the main power is switched on (big transformer with center-tapped windings to produce the required 6 phases from a 3-phase grid).