Central Coalfields Limited has published Tender For Maintenance Of Substation Including Installation Of Busbar Structure,Gravelling Work And Replacement Of Goab Switches,Do Fuse,Installation Of 02 Nos. Onload Isolators And Interlocking Of Switches At Darbhanga House Main Substation And Gnh. Submission Date for this Tender is 18-04-2024. Fuses Tenders in ranchi Jharkhand. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | (A) BUS BAR STRUCTURE (Sl.No.1.1 to 10.1) Supply and fixing of alloy aluminium tubular pipe 1.5" (outside dia. 48.26 mm, inside dia. 40.89 mm, wall thickness 3.69 mm) made of Aluminium grade 63401 WP conforming to IS 5082. |
| 2 | Supply and fixing of pad connector suitable for bus pipe having outer dia 48.26mm |
| 3 | Supply and fixing of connector of alloy aluminium pipe to pipe suitable for bus pipe having outer dia 48.26mm |
| 4 | Supply and fixing of Bi-metallic connector (bus bar pipe to transformer), 1250A rating |
| 5 | Structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete. |
| 6 | Supply and fixing of post insulator, 11 KV grade |
| 7 | Supply & Fixing of GOAB switch, 630Amp 11KV grade |
| 8 | Cost of Onload Isolator/Load break switch 11 KVGrade,800A |
| 9 | Supply & Fixing of DO Fuse set including insulators 11KV grade |
| 10 | Providing and fixing bolts including nuts and washers complete. |
| 11 | (B) INTERLOCKING (Sl.No.11.2 to 13.2) Supply and fixing of Limit switch with roller lever, SPDT- 1NO+1NC , contact voltage(AC) rating- 600A max, contact current AC- 10A max. |
| 12 | Supply and fixing of Copper cable 2.5 sq.mm x 2 core |
| 13 | Supply and fixing of Auxilary contactor |
| 14 | (C) Lightning Protection of S/S (mesh type)(Sl.No.14.3 to 20.3)Erection of pole of following length in cementconcrete 1:3:6 (1 cement : 3 coarse sand : 6 graded stone aggregate 40mm nominal size) foundation including excavation and refilling etc. as required.Above 10.00 metre and upto 12 m |
| 15 | Supply & fixing of Post Insulator, 11kv grade (for lighting arrestors) |
| 16 | Supply & fixing of lighting arrestor made of EC grade solid copper bar, length 1.2 mtrs with solid copper ball on top embedded with copper spikes. |
| 17 | Earthing with copper earth plate 600 mm x 600mm x3 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 metre long etc. with charcoal/coke and salt as required. |
| 18 | Supply and erection of 10 sq. mm ISI marked, FRLS PVC insulated, single corecopper conductor cable (for connection of Lightning Arrestors) |
| 19 | Supply of 6 SWG GI wire (for Continues earth wire ) |
| 20 | Erection of GI wire 8/6 SWG including binding etc as required. |
| 21 | (D) GRAVELLING WORKS(Sl. No.- 21.4 to 23.4)Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m inwidth as well as 10 sqm on plan) including disposal of excavatedearth, lead upto 50 m and lift upto 1.5 m, disposed earth to be levelled and neatly dressed 2.7.1 Ordinary rock(502 sqm X 0.40 M = 207.2 cum) |
| 22 | Supplying, filling, spreading & leveling gravels of size range 5 mm to 10 mm, in the recharge pit, over the existing layer of boulders, in required thickness, for all leads & lifts, all complete as per direction of Engineer-in-charge. (502 sqm X 0.20 M = 103.6 cum) |
| 23 | Supplying, filling, spreading & leveling coarse sand of size range 1.5 mm to 2 mm in recharge pit, in required thickness over gravel layer, for all leads & lifts, all complete as per direction of Engineer -incharge. (502 sqm X 0.20 M = 103.6 cum) |
| 24 | Total impact of GST for the purpose of CTC |
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