Design Considerations on Three Phase Enclosure Type Gas Insulated Substation

A series of three phase enclosure type gas insulated substations is developed at the voltage ratings from 72 kV up to 204 kV. All the substation equipments, not only the switchgears and bus works but measuring transformers, surge arresters and the connections to transformers and cables are enclosed three phases in a common enclosure in the gas insulated substation (GIS).