Moisture level content analysis in oil impregnated pressboard used in power transformers

Author

Sebok, Milan ; Zukowski, PaweÅ‚ ; Koltunowicz, Tomasz N. ; Kierczynski, Konrad ; Subocz, J. ; Szrot, Marek

Author_Institution

Dept. of Meas. & Appl. Electr. Eng., Univ. of Zilina, Zilina, Slovakia

fYear

2014

fDate

19-20 May 2014

Firstpage

369

Lastpage

374

Abstract

The article presents the results of research based on the DC electrical conductivity of wet paper depending on the moisture content and temperature of the samples. The change of moisture content does not change the activation energy of conductivity. The conductivity is performed by the hopping mechanism between the nearest possible holes which are formed in the material with nanodrops of water by the plotting of theoretical dependence that accurately describes the dependence of the conductivity of the water content and temperature. Medium size of nanodrops was about 1.5 nm, and the composition contains about 220 molecules of water.

Keywords

electrical conductivity; impregnated insulation; moisture; power transformer insulation; transformer oil; water; DC electrical conductivity; hopping mechanism; moisture level content analysis; oil impregnated pressboard; power transformers; water content conductivity; water nanodrops; wet paper; Conductivity; Electrodes; Electronic ballasts; Humidity; Moisture; Nanostructured materials; DC conductivity; electrotechnic pressboard; jump exchange of electron; moisture content; potential well;

fLanguage

English

Publisher

ieee

Conference_Titel

ELEKTRO, 2014

Conference_Location

Rajecke Teplice

Print_ISBN

978-1-4799-3720-2

Type

conf

DOI

10.1109/ELEKTRO.2014.6848920

Filename

6848920