Due to scarcity and high price of land, Gas Insulated Switchgears are gaining popularity in India in many other countries. It consumes much smaller space comparing to outdoor switchyard. All switchgear components like CB, isolator, CT, PT, LA bus bars are mounted in SF6 gas filled chambers. Since SF6 gas provides much better insulation than air, the phase to phase and phase to earth clearances can be reduced considerably resulting in very compact design of switchgears. Because of completely sealed design maintenance is much less and hence needs lesser number of operating staff.