Isothermal microcalorimetry as a tool for studying oxidation stability of insulating liquids

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 duri...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2012-10, Vol.19 (5), p.1528-1536
Main Authors: Tronstad, I., Blekkan, E. A., Ese, M-H G.
Format: Article
Language:English
Subjects:
calorimetry
Dielectric liquids
Dielectrics
Electrical insulation
Heating
Indicators
Integrals
Isothermal processes
Liquids
Oxidation
oxidation stability
power transformers
Stability
Stability analysis
Temperature measurement
Thermal stability
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Summary: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.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2012.6311497