Gas Insulated Substation (GIS) – Definition, Construction, Working, Diagram, Types, Advantages, Disadvantages & Applications
A Gas Insulated Substation (GIS) is a high-voltage substation in which the primary components are enclosed in an insulating gas medium, typically sulfur hexafluoride (SF₆). GIS is known for its compact and enclosed design, which makes it suitable for urban or restricted spaces. Below, we explore its definition, construction, working, types, advantages, disadvantages, and applications.