ELECTRIC CIRCUIT FOR ELECTRIC ARC FURNACE Russian patent published in 2017 - IPC H05B7/148 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electric circuits of electric arc furnaces of alternating current and discloses an electric arc furnace and a method to control resistance of one or more phases of the secondary circuit of an electric arc furnace in order to limit asymmetry of phases, which comprises transformer (31); a secondary circuit with variable resistance of one or several phases, (F1, F2, F3); rigid fixed connection (32) for each phase (F1, F2, F3), connected to the transformer; flexible cables (33) with the first end attached to rigid connection (32); electrode holders (34) attached to the second end of flexible cables (33); conducting electrodes (35) fixed in corresponding electrode holders (34). Rigid fixed connection (32) of phase (F1, F2, F3) contains at least one coil (11), wherein to obtain the required value of resistance the resistance is either continuously or discretely controlled.

EFFECT: invention provides the possibility of adjusting resistance irrespective of a position of the electrode holders, the length of the electrodes and other external factors.

13 cl, 2 dwg