Re-insulation and recoiling of the old and used coils of 2MVA -11/3.3KV, 5MVA - 33/11KV, Transformers of CWS(X) Talcher MCL

Re-insulation and recoiling of 3Nos old and used primary coils of 2MVA 11/3.3 KV POWER Transformer with proper grade of insulation. i. Covering should be TPC ii. Dimensions and other insulation should be exactly as per old coils. Primary coil data: Type-Disc coils 1. 99.9% Electrolytic Bright annealed copper strip with TPC. 2. No of Conductor: (i) For DISC coil = 1 3. size of conductor: Bare: 7.1X2.9MM , TPC:7.5X3.4MM 4. No of DISC : 64 As per sample,TURN/DISC: 11(approx) 5. Coil Size: ID:375mm, OD:475mm and HT:760mm 6. Weight of each coil: 185 Kg (including insulation) 7. No. of coils: Three(03) 8. Tap Range : +7.5% to -7.5% ( In stpes of 2.5%) Detail scope of work 1. Scraping of the old insulation, acid washing and pre annealing for all bend straightening of the disc coils. Straightening of the bend portions through roller die, final annealing and covering with four layers of class A manila Kraft papers of specific sizes as required, with in clock and anti clock direction with overlapping and bringing the insulated conductor as per specification provided. 2. formation of disc coils with all lock joint cut spaces as required, pre-compressed press-phan boards of good quality and winding the coils with 14% Rupatan sticks and E.C grade copper foils for tapping of the primary coils and else where if required. Finally placement of the coils in bake chamber and pressing the same till the desired window heights are achieved. (including materials, manpower,and other overheads)

Re-insulation, recovering and recoiling of 3nos old and used Secondary coils of 2 MVA 11/3.3KV Power Transformer with proper grade of insulation. i. Covering should be TPC ii. Dimensions and other insulation should be exactly as per old coils Secondary coil data: Type-cylinderical 1. 99.9% Electrolytic Bright annealed copper strip with TPC. 2. No. of conductor - 12(2AX6R) 3. size of conductor: Bare: 6.6mm X 2.0mm DPC: 7.0mm X 2.4mm 4. No of TURN:113 As per sample 5. Coil Size: ID:290mm, OD:365mm and HT:805mm 6. Weight of each coil: 146 Kg (including insulation) 7. No. of Coils: Three (03) Detail scope of work 1. Scraping of f the old insulation, acid washing and pre annealing for all bend straightening of the disc coils. Straightening of the bend portions through roller die, final annealing and covering with two layers of class A manila Kraft papers of specific sizes as required, with in clock and anti clock direction with overlapping and bringing the insulated conductor as per specification provided. 2. Formation of disc coils with all lock joint cut spaces as required, pre-compressed pressphan boards of good quality and winding the coils with 14% Rupatan sticks and elsewhere if required. Finally placement of the coils in bake chamber and pressing the same till the desired window heights are achieved. (including materials, manpower,and other overheads)

Re-insulation and recoiling of 3Nos old and used primary coils of 5MVA 33/11 KV Power Transformer with proper electrical grade of kraft insulation. i. Covering should be TPC ii. Dimensions and other insulation should be exactly as per old coils. Primary coil data: Type-Disc coils 1. 99.9% Electrolytic Bright annealed copper strip with TPC. 2. No of Conductor: (i) For DISC coil = 1 3. size of conductor: Bare: 8.8mm X 1.9mm DPC: 9.2mm X 2.3mm 4. No of Discs : 64 ,TURN/DISC: 19(APPROX.) As per Sample / Old Coil 5. Coil Size: ID: 485mm, OD:580mm and HT:745mm 6. Weight of each coil: 276 Kg (including insulation) 7. No. of coils: Three(03) 8. Tap Range : +7.5% to -15% ( In stpes of 2.5%) Tap lead position AS PER SAMPLE/OLD COIL Detail scope of work 1. Scraping of the old insulation, acid washing and pre annealing for all bend straightening of the disc coils. Straightening of the bend portions through roller die, final annealing and covering with four layers of class A manila Kraft papers of specific sizes as required, with in clock and anti clock direction with overlapping and bringing the insulated conductor as per specification provided. 2. formation of disc coils with all lock joint cut spaces as required, pre-compressed press-phan boards of good quality and winding the coils with 14% Rupatan sticks and E.C grade copper foils for tapping of the primary coils and else where if required. Finally placement of the coils in bake chamber and pressing the same till the desired window heights are achieved. (including materials, manpower,and other overheads)

Re-insulation, recovering and recoiling of 3nos old and used Secondary coils of 5MVA 33/11KV Power Transformer with proper electrical grade of grade of kraft insulation. i. Covering should be TPC ii. Dimensions and other insulation should be exactly as per old coils Secondary coil data: Type-DISC TYPE COILS 1. 99.9% Electrolytic Bright annealed copper strip with TPC. 2. No. of conductor : FOR DISC COIL: 2(TWO) 3. size of conductor: Bare: 14.8mm X 3mm TPC: 15.2mm X 3.4mm 4. No of DISC: 38 , TURN/DISC: 12(APPROX.) As Per Sample /Old Coil 5. Coil Size: ID:362 mm, OD:438 mm and HT:740 mm 6. Weight of each coil: 192 Kg (including insulation) 7. No. of Coils: Three (03) 8. CORE DETAILS: CORE DIA:340MM , LIMB CENTRE :605MM , WINDOW HEIGHT:910MM Detail scope of work 1. Scraping of f the old insulation, acid washing and pre annealing for all bend straightening of the disc coils. Straightening of the bend portions through roller die, final annealing and covering with two layers of class A manila Kraft papers of specific sizes as required, with in clock and anti clock direction with overlapping and bringing the insulated conductor as per specification provided. 2. Formation of disc coils with all lock joint cut spaces as required, pre-compressed pressphan boards of good quality and winding the coils with 14% Rupatan sticks and elsewhere if required. Finally placement of the coils in bake chamber and pressing the same till the desired window heights are achieved. (including materials, manpower,and other overheads)

Total impact of GST plus Labour Cess [@ 1 % (BOCW Cess to be deducted from the RA bill as per the value of the work progress)] for the purpose of CTC