Bids are invited for supply of substation package for the 400/230 kV, 1x500 MVA inter connecting transformers (ICT) and associated bay extension works at the Arasur substation; 400/230 kV, 1x500 MVA ICT and associated bay extension works at the Karaikudi substation; 400/230 kV, 1x500 MVA ICT and associated bay extension works at the Tirunelveli substation; 400/230 kV, 1x500 MVA ICT and associated bay extension works at the Pondicherry substation; and 400/220 kV 1x500 MVA ICT and associated bay extension works at the Kozhikode substation under the Augmentation of Transformation capacity in Southern Region.