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Advantages of changing 3-phase ARC furnaces asymmetry estimation criteria in international and european standards

Białek J., Wąsowski A.

Electrical Power Quality and Utilisation. Journal

2005

Vol. 11, nr 1

93-96

The criteria for estimating the asymmetry of arc furnace circuit impedances, referring to the theory of symmetrical components, have been presented. In contrast to the criteria recommended as yet by IEC and CENELEC, they give homogeneous estimation of asymmetry of circuit impedances, heating powers and unbalance of arc currents. Moreover they make it possible to take into account functional dependences among them and, consequently, to improve the analysis of unbalanced operation states of EAF, as well as their balancing.