Interfacial phenomena in composite electrical insulation-space charge properties at insulation interfaces under the low frequency voltage

This report focuses on the dielectric properties and space charge properties at the interface between composite electrical insulation materials, such as the two interfaces in prefabricated joints. As part of this research, a basic study was made of the interface between materials of the same kind in which one epoxy sheet is laid over another. Measurements were taken of the frequency dependence of the dielectric properties at the interface and of the space charge in the characteristic very-low-frequency region. These results are reflected in an investigation of the space charge behavior at the interface between composite electrical insulation materials