International competitive bids are invited for the design, supply, installation, testing, commissioning and maintenance of 66 kV gas-insulated switchgear (GIS) and 11 kV switchgear; alternate current (AC) and direct current (DC) protection system including tele communication systems; high voltage (HV) cable from switchgear to transformers; 66 kV power transformers; and associated civil works which includes building services and maintenance.