Title :
Isothermal microcalorimetry as a tool for studying oxidation stability of insulating liquids
Author :
Tronstad, Ingvild ; Blekkan, Edd A. ; Ese, Marit-Helen G.
Author_Institution :
Dept. of Chem. Eng., Norwegian Univ. of Sci. & Technol. (NTNU), Trondheim, Norway
fDate :
10/1/2012 12:00:00 AM
Abstract :
The application of an isothermal microcalorimeter for the investigation of the oxidation stability of insulating liquids has been studied. We propose that the total integral heat signal (area below the calorimeter curves) is a good indicator of the degree of oxidation taking place in the sample during the experiment. Known and unknown insulating liquids have been used in this study, and the amount of available oxygen in the samples has been varied. The results show that isothermal microcalorimetry is well suited for characterizing the oxidation stability of insulating liquids.
Keywords :
calorimeters; oxidation; power transformer insulation; stability; transformer oil; insulating liquid; isothermal microcalorimetry tool; oxidation stability; total integral heat signal; transformer; Dielectric liquids; Heating; Isothermal processes; Oxidation; Stability analysis; Temperature measurement; Thermal stability; Dielectric liquids; calorimetry; oxidation stability; power transformers;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2012.6311497
