ESTIMATE FOR REPLACEMENT OF DEFECTIVE 01 NO. 11 KV ISOLATOR OF 33/ 11 KV S/ s TILDA DC UNDER TILDA D/ C ( O & M ) D. RAIPUR./ ESTIMATE FOR REPLACEMENT OF UNSERVICEABLE ISOLATOR AND AB SWITCHES INSTALLED AT 33/ 11 KV S/ s JOTA UNDER TILDA S/ DN ( O & M ) DN. RAIPUR./ ESTIMATE FOR REPLACEMENT OF UNSERVICEABLE ISOLATOR AND AB SWITCHES INSTALLED AT 33/ 11 KV S/ s JOTA UNDER TILDA S/ DN ( O & M ) DN. RAIPUR.