Západočeská univerzita v Plzni, Fakulta elektrotechnická
Abstract
Substitution of transformer oil as insulator medium by magnetic fluid in transformers requires observation of
electric properties of magnetic fluids at temperatures higher than 20 °C. That´s why important physical quantities
were measured at temperature in interval from 20 °C to 80 °C. The magnetodielectric anisotropy was studied at
the same temperature region. Two important quantities have been measured: specific electric conductivity and
dielectric breakdown strength of magnetic fluids at volume concentrations from 0,185 % to 2 %. So the behavior
of magnetic fluids as insulator medium could be observed at working conditions of transformers