Title :
Influence of impregnating liquids on dielectric response of impregnated cellulose insulation
Author :
Graczkowski, A. ; Gielniak, J.
Author_Institution :
Inst. of Electr. Power Eng., Poznan Univ. of Technol., Poznan, Poland
Abstract :
The dielectric response of cellulose in the form of paper and pressboard was investigated. Samples of pressboard were impregnated with different insulating liquids: new and aged transformer oil and synthetic ester. Samples of non-impregnated paper were investigated during drying process. The research was done for two groups of pressboard with about 5 % and 0.5 % moisture content. The moisture level was determined using Karl Fischer titration. Obtained data were analyzed using Havriliak-Negami relaxation function. The results can be useful for moisture evaluation in various impregnated cellulose insulations e.g. transformers, bushings, capacitors.
Keywords :
impregnated insulation; paper; transformer oil; Havriliak-Negami relaxation function; Karl Fischer titration; aged transformer oil; bushings; capacitors; dielectric response; drying process; impregnated cellulose insulation; impregnating liquids; moisture content; moisture evaluation; nonimpregnated paper; pressboard; synthetic ester; Dielectric liquids; Dielectric measurements; Dielectrics; Moisture; Oil insulation; Petroleum; dielectric frequency response; dielectric liquids; moisture content; paper/pressboard insulation;
Conference_Titel :
Solid Dielectrics (ICSD), 2010 10th IEEE International Conference on
Conference_Location :
Potsdam
Print_ISBN :
978-1-4244-7945-0
Electronic_ISBN :
978-1-4244-7943-6
DOI :
10.1109/ICSD.2010.5567906
