METHOD FOR ADJUSTING POWER BY PHASES OF THREE-ELECTRODE ALTERNATING-CURRENT ARC FURNACE Russian patent published in 2006 - IPC H05B7/148 

FIELD: technology for adjusting power by phases of three-phased alternating-current electric arc-furnace, related to electric metallurgy and methods for power adjustment in three-electrode alternating-current arc furnaces.

SUBSTANCE: method includes adjusting power by phases by means of changing reactive component of resistance due to enabling of static capacitors battery in parallel to phase of short circuit, capacity of which is determined from electric formula where C - required capacity value of adjusting device, farads; ΔI - difference between active value of short circuit phase current with the least reactive resistance and active current values in one of two other phases, kA; D - area of liquid tub in calm state, m²; E - total area of cross-section of three electrodes, m²; P - nominal power of furnace transformer, Wt; n - mass of liquid component in metallic charging, kg; N - total mass of metallic charging, kg; k - coefficient, considering particularities of physical-chemical processes during melting in electric furnace and equal to (0,1-1,5)·10^-11, c·A/Wt².

EFFECT: increased productiveness of furnaces with decreased specific flow of electric energy.

1 dwg, 1 tbl