Electrical insulating materials (dielectrics) can be solid, liquid and gaseous.
The purpose of electrical insulation materials is to prevent the formation of electrical contact between parts of an electrical device and have different electrical potentials.
There are electrical, mechanical, physico-chemical and thermal characteristics of dielectrics.
The resistance and frost resistance of dielectrics is the stability of the electrical and physico-chemical characteristics of heat-insulating materials under the influence of moisture, acids or low temperatures, respectively, from -45 ° C to -60 ° C, as well as a tropical climate, characterized by a high and dramatically changing air temperature on the day , its high humidity and pollution, the presence of mold fungi, insects and rodents.