Synthetic esters have become more and more popular in last few decades, explaining the
increasing number of units filled with this liquid year by year. They have been investigated …

The paper presents research results of different properties of mixtures of the synthetic ester
with mineral oil and synthetic ester with natural ester. For different concentrations of both …

In this study, the temperature–frequency dependencies of the pressboard–bio-oil–water
nanoparticle composite's fundamental parameters—phase shift angle and admittance …

Samples of a dried composite oil-paper system were thermally aged in the laboratory under
N2 in a sealed container and analysed using their dielectric response. The contributing loss …

The article presents an oil moistening method, identical to the oil moistening in power
transformers. Moistening took place through the migration of moisture from the moistened …

The aim of the work was to prepare and test a paper-oil insulation system according to the
recommendations of CIGRE (Conseil International des Grands Réseaux Électriques) with …

It is important to investigate the dielectric behaviour of natural ester-paper insulation, as the
number of transformers choosing natural ester as their insulation oil is increasing. A …

This paper presents the results of the study of the direct current (DC) and alternating current
(AC) electrical properties of an electrical pressboard–bio-insulating oil–water composite in a …

The aim of this study was to perform precision measurements of the frequency-temperature
dependences of the loss angle tangent of the liquid-solid composite with the FDS Dirana …

It is important to investigate the dielectric behaviour of natural ester-paper insulation as the
number of transformer choosing natural ester as its insulation oil is increasing. A …