Tehri Hydro Development Corporation Ltd.
Execution of underground 420 kV SF6 Gas Insulated Switchgears & Gas Insulated Bus ducts has been got done on turnkey basis from M/s SIEMENS AG Germany. The article deals with the various aspects of 420 kV SF6 Gas Insulated Switchgears & Gas Insulated Bus ducts system, highlighting the salient features of equipment & installation.