Multipurpose submerged arc furnaces of  small power (250-500 KVA) are intended for producing ferroalloys  and fused refractories. Smelting of initial charge is performed with the help of two graphitized electrodes in the furnace body lined with refractories and /or carbon blocks. Heat is released by electric current in the arcs and partly in the charge and also by exothermic reactions.
     Dry-type furnace transformers have 10 voltage steps and provide according to the user demand the series (bifilar) or parallel connections of electrodes.
     The furnaces are equipped with frequency-regulated electromechanical drives and automatic controllers of electrode movement as a function of electric parameters of the arc gap. The control cabinets of the furnaces are manufactured on Siemens component base.