Abstract
In this paper the electric arc fault in the high voltage winding turn of
the power autotransformer has been investigated. 3D magnetic field
distributions in the leakage domain and electrodynamic forces acting on
high voltage winding have been calculated. Finite Element Method was used
for the magnetic flux density simulation. The elctrodynamic force value
under the fault exceed significantly the nominal mechanical stresses of
the winding.
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