Investigation of the Basic Electrical Insulation Properties of the Two-Component System Using by Several Diagnostic Methods

In this study, the effect of 2.0, respectively 5.0 weight percent filler of halloysite (HNT) dopant for dielectric properties of two two-component polyurethane potting agent were studied. In this study, polyurethane-based potting compounds from VUKI a.s. were used as the base medium, one being a pure potting compound with the factory name VUKOL N22 and the second potting compound having the designation VUKOL N22u Magna Blue. For this purpose, direct volume resistivity measurements and broadband dielectric spectroscopy measurements were used to describe changes in the dielectric responses of the studied nanocomposites doped with HNT. The investigation of the dependence of complex relative permittivity and dissipation factor was conducted using dielectric frequency spectroscopy within a temperature range of 25°C to 120°C and a frequency range of 1 mHz to 1 MHz. The measurements of resistance were carried out following the standard STN 34 6460: 1993, with the ambient temperature consistently maintained at 25°C.