Basic information on Gas Insulated Transmission lines (GIL)

The GIL is a transmission system for the transmission of high power levels over long distances, to solve specific routing or access problems, or as connections in power plants, and substations. Current ratings of 4000 Amps or more per circuit and distances of several kilometers are possible. As a gas-insulated system, the GIL has the advantage of having electrical behavior similar to an overhead line. GIL capacitance is very low allowing long lines to be constructed without reactive compensation. When life cycle costs are considered, the low losses, minimal maintenance costs, high reliability and long life of GIL make it an attractive solution to transmission line installations.