Secondary circuit with variable impedance for electric arc furna

Industrial electric heating furnaces – Arc furnace device – Power supply system

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373 93, 373105, H05B 711

Patent

active

057152730

ABSTRACT:
A secondary circuit having a variable impedance for electric arc furnaces of a type working with alternating current, which is associated with a transformer (11) is disclosed. A secondary circuit comprises at least one rigid connection (12) connected to the outputs (16) of the transformer (11), flexible cables (13) connected through rigid connection elements (29, 129) at first end to the rigid connection (12) and at the other end to specific electrodes (15). At least one branch of the secondary circuit (10) corresponds to a specific phase including at least one of the respective rigid components (12, 17, 29, 129) having at least two parts reciprocally positionable in an adjustable manner according to the required value of overall reactance of the specific branch of the secondary circuit (10) comprising that rigid component (12, 17, 29, 129).

REFERENCES:
patent: 2368998 (1945-02-01), Nissim
patent: 3366725 (1968-01-01), Watterson
patent: 3431344 (1969-03-01), Borrebach
patent: 3483300 (1969-12-01), McGee
patent: 3835232 (1974-09-01), Marchner
patent: 3898707 (1975-08-01), Trageser
patent: 4425658 (1984-01-01), Bretthauer et al.

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