Influence of Temperature Aging on Oxidation Stability and Activation Energy of Insulating Liquids

Insulation liquids are mainly used in oil filled transformers for their cooling and insulating properties. Besides a testing of electrical properties, there is also important to monitor oxidation stability and activation energy as the factors which can decide on an application possibility of the ins...

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Main Authors: Mentlik, V., Polansky, R., Prosr, P.
Format: Conference Proceeding
Language:English
Subjects:
Aging
Cooling
Dielectric liquids
Oil insulation
Oxidation
Petroleum
Power transformer insulation
Stability
Temperature
Testing
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Polansky, R.
Prosr, P.
description Insulation liquids are mainly used in oil filled transformers for their cooling and insulating properties. Besides a testing of electrical properties, there is also important to monitor oxidation stability and activation energy as the factors which can decide on an application possibility of the insulating liquid. The main aim of this paper is to describe the influence of temperature aging on the oxidation stability and activation energy of tested insulating liquids (common petroleum based product and dioctyladipate - di(2-ethylhexyl) ester of adipic acid - synthetic based liquid). Both liquids were exposed to a longterm thermal aging at the temperature of 90degC for 3000 hours. A thermogravimetry was applied to determine the activation energy, oxidation stability tests were performed by differential scanning calorimetry.
doi_str_mv 10.1109/CEIDP.2008.4772789
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Aging
Cooling
Dielectric liquids
Oil insulation
Oxidation
Petroleum
Power transformer insulation
Stability
Temperature
Testing
title Influence of Temperature Aging on Oxidation Stability and Activation Energy of Insulating Liquids
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