Title :
PDC measurement evaluation on oil-pressboard samples
Author :
Shayegani, A.A. ; Hassan, O. ; Borsi, H. ; Gockenbach, E. ; Mohseni, H.
Author_Institution :
Inst. of Electr. Power Syst., Hannover Univ., Germany
Abstract :
In this paper the measuring results of polarization and depolarization currents (PDC) on oil-pressboard samples will be presented. The measurements were carried out under different condition and the results compared. For repeatability purpose the samples were provided at specific condition. Moisture of samples was measured by Karl Fischer titration method. To obtain a quantitative parameter from PDC for the evaluation of the moisture content of the solid insulation, the depolarization current curves are decomposed to basic exponential functions. Obtained results show a relation between magnitude of mid decade (100 s - 1000 s) approximate exponential function and moisture content of solid insulation.
Keywords :
dielectric depolarisation; dielectric polarisation; organic insulating materials; 100 to 1000 s; Karl Fischer titration method; PDC measurement evaluation; depolarization current; exponential functions; middecade approximate exponential function; oil-pressboard samples; polarization current; samples moisture; solid insulation; Circuit testing; Current measurement; Dielectric measurements; Dielectrics and electrical insulation; Moisture; Petroleum; Polarization; Power transformer insulation; Solids; Voltage;
Conference_Titel :
Solid Dielectrics, 2004. ICSD 2004. Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8348-6
DOI :
10.1109/ICSD.2004.1350287
