| Popis: |
Main features of the insulating fluids based on natural esters are biodegradability, a good thermal and insulating features, a high fire resistance etc. Compared to the mineral oil, the fluids based on natural esters still have a problematic development of a trend of dissipation factor in the long-term period due to lower oxidative stability. This paper primarily presents a comparison of key dielectric parameters of clean natural ester insulation fluid (rapeseed oil) and several mixtures of this rapeseed oil with 1 wt% of different antioxidants. The aim of this paper is to choose the antioxidant which contributes to achieving the best dielectric parameters of oil based on various measurement. Part of the evaluation was establishing the oxidative stability. |
