发明名称 |
METHOD FOR BALANCING ELECTRICAL VALVES IN THREE-PHASE ARC FURNACES, AND DEVICE TO CARRY OUT THE METHOD |
摘要 |
<p>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 differences between the arc current amplitudes of the three electrodes are less than a given value.</p> |
申请公布号 |
EP0197329(A3) |
申请公布日期 |
1988.06.22 |
申请号 |
EP19860103145 |
申请日期 |
1986.03.08 |
申请人 |
FRIED. KRUPP GESELLSCHAFT MIT BESCHRANKTER HAFTUNG |
发明人 |
BRETTHAUER, KARLHEINZ, PROF. DR.;OBENAUF, HANS-DIETRICH |
分类号 |
H05B7/148;(IPC1-7):H05B7/148 |
主分类号 |
H05B7/148 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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