Pre-Bid Tie Up For 400Kv Transformer Package-Tr10T For 400/220/33Kv 2X 500 Mva, 3-Ph Ict At Koppal-Ii Associated With Transmission Scheme For Integration Of Renewable Energy Zone (Phase-Ii) In Koppal-Ii (Phase-B) Through Tariff Based Competitive Bidding (Tbcb) Route Prior To Rfp Bid Submission By Powergrid To Bpc./Cc/T/W-Tr/Dom/A02/23/03161/Rfx: 4010000100/22928 (EXPIRED)