Installation and commissioning of compact substation at South Block, Nalco, Damanjodi

Amount

CIVIL WORKS: (i) Construction of foundation, wall, GI chain Link fence for Compact Substation (CSS) in reference with the attached OEM drawing. (ii) Construction of HT cable trench and installation of cable trays & supporting structures for laying of cables. (iii) GI chain link fence for DP Structures.

Earth work in surface excavation not exceeding 30 cm in depth but exceeding 1.5 m in width as well as 10 sqm on plan including getting out and disposal of excavated earth upto 50 m and lift upto 1.5 m, disposed soil to be levelled and neatly dressed in all kind of soil and as directed by Engineer-in- Charge.

Excavation work by mechanical means (Hydraulic excavator)/ manual means in foundation trenches or drains (not exceeding 1.5m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus excavated soils as directed, within a lead of 50 m. Hard rock (blasting prohibited)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:3:6 (1 Cement: 3 coarse sand (zone-III) : 6 graded stone aggregate 20 mm nominal size)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:2:4 (1 Cement: 2 coarse sand (zone-III) : 4 graded stone aggregate 20 mm nominal size)

Providing and laying in position specified grade of reinforced cement concrete, excluding the cost of centering, shuttering, finishing and reinforcement - All work up to plinth level : 1:1.5:3 (1 cement : 1.5 coarse sand (zone-III): 3 graded stone aggregate 20 mm nominal size)

Centering and shuttering including strutting, propping etc. and removal of form work for foundation.

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. Thermo-Mechanically Treated bars of grade Fe-500D or more.

Finishing with Epoxy paint (two or more coats) at all locations prepared and applied as per manufacturer’s specifications including appropriate priming coat, preparation of surface, etc. complete.

Random rubble masonry with hard stone in foundation and plinth including levelling up with cement concrete 1:6:12 (1 cement : 6 coarse sand : 12 graded stone aggregate 20 mm nominal size) upto plinth level with : Cement mortar 1:6 (1 cement : 6 coarse sand)

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. Supply of all materials including steel is in the scope of party.

Supply and laying of 40mm size gravel in one layer of 150 mm thick including dressing of soil surface and laying the aggregate in uniform layer and desity, including all labour and materials, as per approved drawing, specifications of this tender and directions of EIC. (Aggregate will be measured in boxes of size 1.5mx1.5mx0.5m which shall be taken as 1 cubic meter, the boxes are to be furnished by the contactor free of cost for measuring purpose.

Providing and fixing G.I. chain link fabric fencing of required width in mesh size 50x50 mm including strengthening with 2 mm dia wire or nuts, bolts and washers as required complete as per the direction of Engineer-in-charge. Made of G.I. wire of dia 4 mm

TRANSPORTATION:

Shifting of Compact Substation (6.5 MT approx) from Mines Central Store to South Block Mine and installation of same on the foundation.

Loading, unloading and transporting of 11m length used rail pole from Refinery to Mines site with supply of all labour, machinery and trailer etc by the Party's own arrangement. Only material gate pass shall be issued to Party during shifting of the material. Quantity of the transporting material shall be limited to carrying capacity of the trailer (10 T approx.)

ELECTRICAL WORKS:

Fabrication, installation, testing & commissioning of 33 KV, 10.5 m, Double Pole terminating structure for tapping power from an overhead line erected on 132 KV Double Circuit towers excluding the supply and installation of AB Switch and Lightning Arresters. This structure shall be made to contain 630 A AB Switch, Lightning Arrester as main equipments. Party's scope shall include labour, transportation & installation of used rail poles from owner's store/yard (only used Rail Poles to be supplied by NALCO), supply of MS angles/channels/ GI flats, clamps/connectors, GI Stay Set, Anti Climbing Device, Danger Board & entrance door, Mass concreting of line poles,civil foundation & stay set, Red oxide primer , Aluminium paint & Black paint, Nuts Bolts & washers, jumpers, cable support, earthing connection to earth pit grid, and various sundries complete as per CEA regulations. Party shall submit standard drawing of the structure for approval of EIC before installation. Erection of GI chain link fencing and RRM wall with switchyard gravel laying shall be executed through civil items (Nos 2, 3, 4, 9, 10, 11 and 12) in this BOQ.

Transportation from Central Store, Installation, connection, testing & commissioning of 630 A, 33 kV gang operated, DP mounted air insulated Load Break Switch with Earth Switch (LBS & ES mechaniclly interlocked) complete with operating rod & handle, handle lock,clamps/connectors, MS channels as per standard drawing certified by EIC. Only Load Break Switch shall be supplied by NALCO as FIM. All other materials are in the scope of party.

Transportation from Central Store, Installation, connection, testing & commissioning of 3 Phase, 30 kV, Class-3 Lightning Arresters including base plates, clamps/connectors, hardwares, surge counter & accessories & painting etc. One set of LA which consists of 3 Nos of LAs. Only LAs shall be supplied by NALCO as FIM. All other materials are in the scope of the party.

Fixing & connection of insulators (pin,suspension,tension) with hardware and clamp on poles/structures for 33 kV system, including all labour and as per approved drawing, specifications of this tender and directions of EIC including transportation from owners store/yard. Each set is considered of 04 Nos of 11 kV disc insulators, 01 No of Hardware fiiting and PG clamps as necessary. Insulators, PG clamps,Hardware fittings are to be supplied by NALCO as FIM.MS clamps and all other materials required for completion of work is in the scope of Party

Installation, tensioning and connection of AAAC (DOG) conductor for running over poles, structures including PG clamps, connection to isolators, lightning arresters, cable but including transportation from owners store/yard, all labour and materials as per specifications of this tender and as per directions of EIC. Only AAAC (DOG) conductor shall be supplied as FIM by NALCO.

Supply of all items and making of earth pits including earth excavation in hard soil of size 10 ft. X 2 ft. X 2 ft.or 6"dia x10 feet depth, resurfacing with black cotton soil, supply and preparation of chemical compound (GEM), positioning of high conductive rust free copper bonded earth electrode, clamping of electrode with clamp, supply and laying of 25x4 mm GI strip for connection between earth pit and equipment up to 10 mtr length,complete with brick chamber and RCC cover.All materials including cement, bricks, chemical earthing system materials like ground enhancing material ( minimum 50 kg per earth pit),copper bonded earth electrode(3 mtr long and min 17.2 mm dia), steel rods etc required for chamber and RCC cover is included in the scope of the contractor along with marking and numbering of pits. Earthing materials of make: ERICO / OBO only.

Supply and installation of GI earth strips of size-75x10 mm along the cable trench, cable tray, 4-pole LA structure to ground with weldings at joints, providing anti corrosive enamel, clamping of earth strips etc.

Laying of 33 kV, 3-C, 185 sq mm cables in ready trays/trenches/supported on structure/pull through pipes including supply and fixing of aluminium strip number tags, supply and fixing of GI saddles and saddle bars etc, including transporation from store/yard to site at the place of installation, unpacking, all labour and materials, as per approved drawing, specifications of this tender and directions of EIC.

Supply of earthed, 33 kV, 3-C, 185 sq mm outdoor shielded hit shrink HV termination kit of make 3M or Raychem only including cable glands and lugs as per specification of this tender and direction of EIC.

Termination of earthed, 33 kV, 3-C, 185 sq mm cables and connection of leads including fixing of cable glands, cutting and stripping of cable insulation, crimping of the lugs, restoration of insulation, clamping of cable cores and earthing of armour, including all labour and materials and as per this tender specifications and direction of EIC.

Supplying and making cable route marker with cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size ) of size 60 cm X 60 cm at the bottom and 50 cm X 50 cm at the top with a thickness of 10cm including inscription duly engraved as required.

Supply and fixing of 2 inch dia class B GI pipe of 2 mtr length for cable raiser and water sealing compound to be applied for protection from ingress of water.

Transportation of cable from mines central store to South Block and laying of one number of 1.1 kV grade, 3.5 core, PVC insulated and PVC sheathed / XLPE power cable of sizes above 185 sq. mm and upto 400 sq. mm direct in ground including excavation in hard rock or all kind of soil with trench size 300 mm wide and 800 mm deep, sand cushioninig of 100 mm height, protecting cover with burnt clay/fly ash bricks on the top and refilling of trench with excavated soil. Cable shall be supplied by NALCO as FIM.Shifting of cable from Mines central store to Mines work site is under the scope of the vendor. Supply of bricks and is under the scope of contractor.

Supplying and making of end termination with brass compression gland and aluminium lugs for size 3½ X 300 sq. mm (70mm) of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 KV grade as required.

DRAWINGS & STATUTORY APPROVAL:

Preparing of GA, SLD and circuit drawing of the newly constructed substation, DP structures and other equipments under this contract along with the interconnection with existing 33 kV system as per CEA regulations including liasoning for approval of the same from DGMS. Only statutory expenses shall be paid by NALCO as per actual.

SHANTI POWER AND CONSTRUCTION

SUSHANTA ENGINEERS

ODISHA POWERCARE PRIVATE LIMITED