Rectification/Modification of OLTC tap position increasing to +/- 10% instead of +5%/-15% high voltage winding coils ratio/reconditioning of 220/6.9KV,25/31.5 MVA power transformer-1 & 2 at Bommakal 220/6.9KV substation including dismantling, loading, rectification at workshop, transportation, unloading,erection, testing and commissioning of 220/6.9KV, 25/31.5 MVA power transformer at Bommakal 220/6.9KV substation under Electrical subdivision, O&M Div.No.XXI, Control Room.