Substations with air-insulated switchgear (AIS) are favorably priced high-voltage substations for rated voltages of up to 800 kV. They are popular wherever space restrictions and environmental circumstances are not an issue. AIS substations from Siemens are renowned for highest reliability, economical operation, and low maintenance requirements. Siemens is an integrated provider of high-voltage systems for more than 80 years and also supplies particularly space-saving, compact and even portable air-insulated switchgear solutions. Siemens’ comprehensive range of services also includes all advance studies required for the construction or modernization of a high-voltage substation, the selection of high-voltage devices, and the planning and design in all required fields of engineering