International competitive bids are invited for the engineering, design, manufacturing, factory testing, site delivery, civil works, erection, testing and commissioning of the 500/220 kV gas-insulated switchgear (GIS) substation. It also includes erection, putting in operation of 3x750 MVA, 500/220/22 kV three single-phase auto transformers plus on spare phase (10 single-phase 500/3/22/3 kV auto transformers of 250 MVA each) with their accessories, on load tap changer (OLTC), automatic voltage regulator (AVR), and 22 kV air bus systems to connect the 22 kV windings of auto transformer phases in delta outside the transformer tanks.
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