H - Electricity – 05 – B
Patent
H - Electricity
05
B
307/22
H05B 7/148 (2006.01)
Patent
CA 1281353
ABSTRACT OF THE DISCLOSURE A method and apparatus for electrically balancing the phases of a three phase arc furnace, the furnace having a vessel containing a molten bath, three electrodes above the bath, and a transformer arrangement composed of three phases, each phase including a winding, the transformer arrangement being connected to the electrode so that each electrode conducts an arc current proportional to the voltage across the winding of a respective phase, by the steps of: matching the voltages between the electrodes and the bath to one another by adjusting the spacing between at least one electrode and the bath; and establishing symmetry among the arc currents by: varying the voltage across at least one phase winding by a selected increment; measuring the arc current amplitude in the electrode associated with the at least one phase winding after each variation step; and repeating the steps of varying and measuring until the dif- ferences between the arc current amplitudes of the three electrodes are less than a given value.
505684
Bretthauer Karlheinz
Obenauf Hans-Dietrich
Bretthauer Karlheinz
Fetherstonhaugh & Co.
Fried. Krupp Gesellschaft Mit Beschrankter
Mannesmann Aktiengesellschaft
Obenauf Hans-Dietrich
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