Replacement Of Existing 220 Kv ,120 Kn Src Insulators With New 120 Kn Src Insulators At All Cut Point Towers From Loc No 01 To 69 (30 Nos Towers) To Avoid Frequent Breakdowns In 220 Kv Dc Line From 400 Kv Ss Rachagunneri To 220 Kv Ss Naidupeta In Tirupati District On Turnkey Basis.