ABSTRACT
In multi-dielectric arrangements, electric field distribution is dependent on permittivities of the dielectrics along with the physical dimensions. Electric field distribution in widely used real-life equipment such as parallel plate capacitor, coaxial cable and high-voltage bushing, which comprise multiple dielectric media. If the separation distance between the plates is considered much smaller compared to the length and breadth of the plates, then the flux lines may be considered to be parallel to each other between the plates and also perpendicular to the plates within the dielectrics, neglecting the fringing of flux at the edges of the plates. The dielectric strength of air filling the void will be lower than that of the insulating medium. Consequently, there is every possibility that electric field intensity in the void may be in excess of the dielectric strength of air at the pressure and temperature within the void.
