Optimization of Insulators for Gas Insulated Systems

The general problem of which insulator configuration is best for gas-insulated systems is considered. A smooth disc is compared with both a corrugated disc and a cone and the cone is seen to have considerable potential. Impulse and switching surge voltages are more severe than 60 Hz when contamination is present on the insulators. When insulators are contaminated, the dielectric strength cannot be increased by increasing pressure.