| 摘要 |
A reactance ballast device (V), in particular for an arc furnace, has an induction coil (1) and a free-standing load stepping switch (2), with the load stepping switch (2) being designed to adjust the reactance of the induction coil (1) while on load. A transformer (T), in particular for an arc furnace (O), has an associated reactance ballast device (V) of the type mentioned initially. An arc furnace (O), in particular for steel smelting, is preceded by a transformer (T) such as this.
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