Maschinenfabrik Reinhausen Gmbh

Klaus Krueger

Dieter Dohnal

Karsten Viereck

Alexei Babizki

Disclosed is a device and method for reducing network feedback during operation of an electric-arc furnace (). The electric-arc furnace () has three lines () with one electrode () each. A sensor () for measuring the currently flowing current and a sensor () for measuring the currently applied voltage are provided in each line. A control and regulating unit () calculates an electrical actual value (E, E, E). A semiconductor tap changer () is assigned to the furnace transformer () such that, by suitably selecting three target winding taps (T, T, T) of a primary side (P) of the furnace transformer (), a target current (I, I, I) is adjustable in each line ().

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Saaldorf-Surheim, Germany

Klaus Krueger