International competitive bids are invited for the extension of the 400 kV Biharshariff substation; the 400/220kV Maithon substation including transformer; the 400/132 kV Banka substation including transformer; the 400/132 kV Lakhisarai substation including transformer; the 220/132 kV Rangpo gas-insulated switchgear (GIS) substation
