Electronic edition ISSN 1574-0579

The DC- and AC-dielectric breakdown strength of magnetic fluids based on transformer oil

P. Kopċanský¹ , K. Marton² , L. Tomċo³ , M. Koneracká¹ , M. Timko¹ , I. Potoċová¹ , F. Herchl¹

¹ Institute of Experimental Physics, Slovak Academy of Sciences, 47 Watsonova, 04001 Košice, Slovakia
² Faculty of Electrotechnics and Informatics, Technical University, 9/A Letná, 041 20 Košice, Slovakia
³ Department of Aerodynamics and Simulations, Faculty of Aviation, Technical University, 7 Rampová, 041 21 Košice, Slovakia

Abstract
The DC- and AC-dielectric breakdown strength of the transformer oil TECHNOL US 4000 based magnetic fluid was studied. The AC dielectric breakdown strength of the magnetic fluid was found to be not worse than that of the pure transformer oil. A better heat transfer provided by the use of magnetic fluids in transformers may result in the improvement of their operation. Figs 4, Refs 5.