Dc arc furnace operation

Details Dc arc furnace operation Dc arc furnace operation

H - Electricity

05

B

H05B 7/00 (2006.01)

Patent

CA 2346139

In the operation of a dc arc furnace components of the furnace are monitored to detect unwanted arcs. A first low impedance path is continuously established between the components. When an arc is detected a second conductive path of a predetermined impedance is established between the components, in parallel to the first low impedance path, to extinguish the arc. After the arc has been extinguished the second path is open circuited to restore the furnace to normal operation.

Durant le fonctionnement d'un four à arc à courant continu, on contrôle les composants dudit four afin de détecter les arcs indésirables. Un premier trajet à faible impédance est établi en continu entre les composants. Quand un arc est détecté, un second trajet conducteur, d'une impédance prédéterminée, est établi entre les composants, parallèlement au premier trajet à faible impédance, afin d'éteindre ledit arc. Une fois celui-ci éteint, le second trajet est mis en circuit ouvert de façon à rétablir le fonctionnement normal du four.

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