Delhi Transco Limited, a Government of NCT of Delhi undertaking, invites online e-tenders for the conversion of existing 220/33/11 kV Air Insulated Substation (AIS) into 400/220/33 kV Gas Insulated Substation (GIS) at Gopalpur, along with augmentation of 66 kV GIS. The scope includes design, engineering, supply, erection, testing, commissioning of 400/220/33 kV GIS, complete civil works, and automation on a turnkey basis. Tender No.: T25R220481 Tender ID: 2026_DTL_294096_1 Unique No.: DTL-0058-240626 Important Dates: Last date for bid submission: 12.08.2026 at 01:30 P.M. Important Instructions: All corrigendum, addendum, amendments, extensions, and clarifications will be published only on the official websites. Bidders must regularly check updates. Websites: https://govtprocurement.delhi.gov.in www.dtl.gov.in Contact Details: Delhi Transco Limited Office of the Tendering Authority, DTL Government of NCT of Delhi Undertaking Website: www.dtl.gov.in