The research on dielectric frequency response of oil-paper composite insulation modified by
nanoparticles has been carried out in order to seek possible way to improve insulation …

Because the temperature and load of transformer are variable, the moisture is usually
inhomogeneous in oil-paper, especially for the traction transformer. In order to research the …

Frequency domain spectroscopy is a potential tool for non-invasive condition assessment of
oil-paper insulation in power equipment. On the other hand, it is well known that the results …

Results of Frequency Domain Spectroscopy measurements are known to be largely
influenced by environmental conditions, such as the temperature. Because field …

The paper presents an analysis of test results by Frequency Domain Spectroscopy (FDS) of
the loss tangent (tgδ) in electrotechnical pressboard impregnated with insulating oil and …

The paper presents results of testing permittivity of an oil-impregnated electric pressboard
containing water nanoparticles depending on AC frequency, moisture content level and the …

Although vegetable oil is the best substitute for mineral oil, it exhibits numerous
disadvantages, including a high dielectric loss factor, low volume resistivity, and high …

In order to distinguish the influences of moisture and aging on the frequency domain
dielectric response of oil-paper insulation and better apply frequency domain spectroscopy …

When mineral oil is exposed to aging processes during their operation, oil properties
significantly deteriorate. This necessitates reclamation of the oil or replacement with a new …

In this study, the dielectric characteristics of two types of natural esters modified into
nanofluids are studied. The AC breakdown voltage was investigated for colloidal Fe2O3 and …