Spang Power Electronics is a manufacturer of custom power equipment installed throughout the VAR industry for the refining of steels, superalloys, titanium, and zirconium. Vacuum arc remelting is the continuous remelting of a consumable electrode by means of an electric dc arc between the electrode and the base of a copper mold. Within the VAR furnace the copper mold is contained by a water jacket. Intense heat generated by the arc melts the tip of the electrode while a new ingot is progressively formed below in the water-cooled mold. A high vacuum is maintained throughout the process.
Spang Power Electronics provides both Saturable-Core Reactor and SCR based Power Systems configured as direct current VAR rectifiers. These are available in multiple configurations with precise digital current control, ripple filtering, and network communications for VAR applications.