Mahanadi Coalfields Limited Tender

Re-insulation and recoiling of 3 Nos old and used primary coils of 750KVA 3.3/0.440 KV Transformers 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: 11.7X2.5MM TPC:12.2X3.0MM 4. No of Discs : 28, TURN/DISC:12(APPROX.) As per Sample / Old Coil 5. Coil Size: ID:290mm, OD:360mm and HT:515mm 6. Weight of each coil: 96KG (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 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 for separators and winding the coils with 14% Rupatan sticks if required. Finally placement of the coils in heat chamber and pressing the same till the desired specifcations are achieved. (total cost including materials, manpower, transport to and fro, packing and forwarding charges and other overheads)

Re-insulation and recoiling of 3Nos old and used primary coils of 1MVA 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: 6mm X 2mm TPC: 6.4mm X 2.4mm 4. No of Discs : 52 ,TURN/DISC: 18(APPROX) As per Sample / Old Coil 5. Coil Size: ID: 340mm, OD:430mm and HT:545mm 6. Weight of each coil: 116 Kg (including insulation) 7. No. of coils: Three(03) 8. Tap Range : +10% to -10% ( 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 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 for separators and winding the coils with 14% Rupatan sticks if required. Finally placement of the coils in heat chamber and pressing the same till the desired specifcations are achieved. (total cost including materials, manpower, transport to and fro, packing and forwarding charges and other overheads)

Re-insulation, recovering and recoiling of 3nos old and used Secondary coils of 1MVA 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-DISC TYPE 1. 99.9% Electrolytic Bright annealed copper strip with TPC. 2. No. of conductor : FOR DISC COIL: 2(TWO) 3. size of conductor: Bare: 8.6mm X 3.5mm TPC: 9.0mm X 4.0mm 4. No of DISC: 36 , TURN/DISC: 4 As Per Sample /Old Coil 5. Coil Size: ID:245 mm, OD:320 mm and HT:540 mm 6. Weight of each coil: 76 Kg (including insulation) 7. No. of Coils: Three (03) 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 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 for separators and winding the coils with 14% Rupatan sticks if required. Finally placement of the coils in heat chamber and pressing the same till the desired specifcations are achieved. (total cost including materials, manpower, transport to and fro, packing and forwarding charges 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