Thermal analysis of varnish treated insulating papers for transformers

Author

Song, Il-Keun ; Lee, Byung Sung ; Jung, Jong Wook ; Kim, Sang Joon

Author_Institution

Power Syst. Lab., KEPRI, Daejeon, South Korea

fYear

2003

fDate

23-25 Sept. 2003

Firstpage

583

Lastpage

586

Abstract

This paper describes the thermal characteristics of varnish treated Kraft and aramid papers in order to understand the effect of the varnish concentration on the heat flow pattern. The insulating papers were impregnated by the varnish diluted with solvent and then dried completely. The heat flow of the specimens was obtained using a differential scanning calorimeter (DSC) and analyzed. As a result, the heat flow curves of varnish and varnish treated insulating paper linearly changed with the varnish concentration and it was confirmed that the varnish concentration could be determined by comparing with the changing patterns in heat flow of the varnish treated insulating papers with temperature.

Keywords

differential scanning calorimetry; heat transfer; insulating materials; paper; power transformer insulation; varnish; aramid papers; differential scanning calorimetry; heat flow curves; heat flow pattern; insulating materials; kraft papers; thermal analysis; transformer insulation; varnish concentration; varnish treated insulating papers; Circuit faults; Heat treatment; Laboratories; Manufacturing; Pattern analysis; Power system analysis computing; Power transformer insulation; Solvents; Temperature; Transformer cores;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Technology Conference, 2003. Proceedings

ISSN

0362-2479

Print_ISBN

0-7803-7935-7

Type

conf

DOI

10.1109/EICEMC.2003.1247952

Filename

1247952