Gas Insulated Substation Equipment for Industrial Applications

An electrical substation is an assembly of components used to direct the flow of electrical energy and, with interrupting and protective devices, to ensure the security of an electrical power system. Until recently the only available method for construction of high voltage systems was to use exposed air insulated equipment supported on porcelain columns. The past decade has witnessed the introduction and wide acceptance of compressed gas insulated equipment as a viable alternative to the conventional substation system. The characteristics of gas insulated substations (GIS) and their application for industrial use at service voltages at 69 kV and above are discussed.