OPEN-TYPE EAF POWER SUPPLY

Power supply units are designed for automatic adjustment of metal remelting procedure in open-type electric arc furnaces of with working volume up to 30 tons. Several versions of supply units of different power and voltage are available depending on furnace features.Use of water cooling and powerful new thyristors allows to minimize the power supply unit needed installation floor area.                

Microprocessor control system is one of the advantages, that provides the following:                 

• Current-free switching of smelting modes
• Optimization of furnace power input
• Built-in unit status diagnostics and testing
• Connection with external systems through RS-485 interface.

Main control system functions:                    

• Automatic control of the technological variables (current stabilization at a given level);
• Dynamic protection from peak current loads under unstable furnace operating conditions (elimination of operational short circuits)
• Automatic mode of forced oscillation of hearth electrode currents (MHD mixing system)

Automatic current reduction in the furnace by «protection from stray arcs» signal.Current control during automatic ignition of the arc.Automatic switching of power modes on command from the furnace control panel via RS-485 interface or local control.Limiting the level of impact on the supply mains during dynamic loads in the melting process.