Annual Maintenance Contract (AMC) for 33 KV overhead line system at Nalco Mines, Damanjodi

Amount

Checking of disc insulator for damage & tightening of it’s hard wares.(Three insulators will be considered as one Set)

Tighting of jumpers (one point for both end tightening)

Replacement of damaged insulator (s) (set up to 06 nos.of insulators) including tensioning & normalizing for DP/TP/FP structure of span length .insulators and and hardwares shall supply by Nalco as free issue material.(span length up to 100 mtr)

Replacement of damaged insulator (s) (set up to 06 nos.of insulators) including tensioning & normalizing for DP and tower structure .All hardwares and insulators shall supply by Nalco as free issue materials.(span length 300- 800 mtr)

Dismantling of AAAC/ACSR Leopard conductor and depositing at NALCO Mines Stores by partys own arrangement.

Dismantling of 7/10 SWG GI wire & depositing at NALCO Stores by partysown arrangement.

Stringing of AAAC/ACSR Leopard conductor maintaning the required sag and tension per conductor per span of apprx. 100 Mtrs. on DP structure. The party has to take immediate action Incase of conductor snapping ,jointing of conductor or relaying of new conductor with proper sag .Nalco shall supply all hardwares to the party as free issue material.

Stringing of AAAC/ACSR Leopard conductor maintaning the required sag and tension per conductor per span on tower(span length 300-800 mtr)

Stringing of GI earth wire maintaning the required sag and tension per conductor per span on tower structures(span length 300-800 mtr)

Stringing of GI earth wire maintening the required sag and tension per conductor per span on tower and DP structure(span length 100 mtr)

Removal of earth pit connections, measuring earth resistance and connecting them back.Digital earth tester issued to the party during mesurment in presence of E-I-C.Issue and return back of the instrument shall be responsible of the contractor.

Earth work Excavation by mechanical means or manual in foundation, earth pits ,pole foundation,stay foundation,diversion of drain,cable trenches and any other earth work in all type of soil(soft rock) including dressing of soil and disposal of surplus excavated soil as directed with a lead distance of 50 mtr(blasting probhibited)

Making or reconditioning of existing earth pit and resurfacing with black cotton soil including repair chamber, laying earth strips and connecting them to structures and measuring of the earth resistance values. Earth strip and other earthing material shall be supplied as free issue item by Nalco.

Replacement of of stay wires , binding of stay set and tensioning them as required and as per the direction of engineer in-chrge.

Revertment of tower footings ,foundation,plinth by RRM with granite boulders including leveling up with cement concrete in ratio 1:4:8 . NALCO shall issue cement free of cost.all other material like stone boulders,sand etc are in the scope of vendor.

Fabrication of cross brasings of DP structure ,cross arms ,tower brasings with different size of angles and channels and misc. fabrication work . All tools and tackles including welding machine,welding generator has to be arranged by the contractor . Nalco shall supply the steels as free issue material.

Repair and maintenance of 33 KV A.B switch,Earth switch,coupler & refixing it in position with adjustment of all contacts ,checking the condition of the support insulator including supply of required hardwares , Nut, bolt, washer as required and as per the direction of engineer in-charge.

Cleaning, checking and testing of IR values of the lighting arrestor and tightenig of all clamps, nuts, bolts, jompers, PG clamps etc. and if required replacement of all old hard wares as per direction of engineer-in-charge.All required hardwares are to be supplied by nalco as free issue item. A set consists of three lighting arrestors & its associated hard wares.

Replacement of LA by disconnection of jumpers , removal of lighting arrestors from 2/4 ploe structures , replacement of same with new ones(LA to be supplied as free issue item by Nalco) by making all connection back as per direction of engineer-in-charge.

Cleaning of weeds & bushes, trimming of trees from the grid area, shuffling of the stone chips with all labour and tools tackles necessary for the jobs,dressing of branches all along the 33 kv line .

Replacement of DAMAGED 33KV pin insulator & binding of the conductor over the insulator with proper spacing . Insulator with all required hardwares shall supply by Nalco as free issue material.

Numbering of towers ,poles ,display of caution boards,earth pit status,etc by Painting and writing letters with fluroscent enemal paint at different areas and sub-stations.All painting materials shall under scope of the contractor.

Cleaning of rust by wire brush & Painting of DP structure for 33 KV over head line with one coat red oxide primer & two coats of aliminium paint including all cross arm & brasing. Bottom 1.5 meters of each pole to be painted with two coats of black paint. Supply of required paints and painting materials are under scope of the supplier.

Cleaning of rust by wire brush & Painting of TP structure for 33 KV over head line with one coat red oxide primer & two coats of aliminium paint including all cross arm & brasing. Bottom 1.5 meters of each pole to be painted with two coats of black paint. Supply of required paints and painting materials are under scope of the supplier.

Cleaning of rust by wire brush & Painting of four pole structure for 33 KV over head line with one coat red oxide primer & two coats of aliminium paint including all cross arm & brasing. Bottom 1.5 meters of each pole to be painted with two coats of black paint.Painting of GI perforated fencing consist of appx. 80 meter squre fencing area. Supply of required paints and painting materials are under scope of the supplier..

Issue from NALCO store up to site with contractor's own arrangements & replacement of out door type 33 KV PT on 4 pole structure then depositing of old PT to NALCO store. PT shall be supplied by NALCO free of cost.

Inspection of 33KV over head line consisting of approx. 18Km length each (starting from MRS to CDS/FMG to CDS) & related sub station for health checking & indentification of fault by both physical as well as thermal as per direction of engineer-in-charge .The party has to arrange one auto adjustment binocular suitable for visible range of minimum 5 km distance with his own cost and utilize the same during inspection.The party has to submit the inspection report with all details once in a month to concern E-I-C.

Inspection of 33KV over head line consisting of approx. 5 Km length each (starting from MRS to SMCP) & related sub station for health checking & indentification of fault by physical inspection as well as by thermal imager as per direction of engineer-in-charge .The party has to arrange one auto adjustment binocular suitable for visible range of minimum 5 km distance with his own cost and utilize the same during inspection.The party has to submit the inspection report with all details once in a month to concern E-I-C.

Inspection of 33KV over head line consisting of approx. 1.8 Km length (starting from MRS to jholaguda pump house) and related substation for health checking & indentification of fault by physical inspection as well as thermal imager as per direction of engineer-in-charge .

provision of suitable guarding by making as per provision of rules 88 of Indian electricity rules.the spacing between the outermost conductor and the guard wire shall not be less than 30 cm both vertically and horizontally .diamond guarding shall be provided at distance of 4 ft minium from the pole on its each side .the guard wire shall be GI wire of 8 swg in size.guard wire to be supplied by nalco as free issue material.all other fixing accessories are under scope of the vendor.The job to be carried out as per direction of E-I-C.

Transportation to site, Erection of new DP structure including excavation of pole pit of size 900x900x1500 mm in all kind of soil,base padding of 200 mm thick with 1:2:4 cement concrete before erection of the pole.The pole be erected in truly vertical position , grouting of foundation with 1:2:4 cement concrete by using 40 mm machined stone chips ,painting of one coat primer ,two coat aluminium paint including supply of paints and pating materials ,connection of all electrical Hard wares ,fabrication cross arm and bracings as required for erection of DP structur.Rail pole ,cement and steel only issued by Nalco as free issue material all other material like bolts and nuts under scope of the contractor .the party has to carry out te job after site clearance and as per the direction of E-I-C .

Transportation to site and erection of new single rail pole including excavation of pole pit of required size in all kind of soil,base padding of 200 mm thick with 1:2:4 cement concrete before erection of the pole. The pole be erected in truly vertical position , grouting of foundation with 1:2:4 cement concrete by using 40 mm machined stone chips ,pole couping,painting of one coat primer ,two coat aluminium paint including supply of paint and painting materials , connection of all electrical Hard wares ,fabrication of bracings and cross arm as required excluding supply of material.Rail pole ,cement and steel only issued by Nalco as free issue material all other material like bolts and nuts under scope of the contractor .The job to be carried out as per the direction of E-I-C .

Providing and laying plain cement concrete for all depths below and up to a plinth level in foundations,out door substation floor including tamping,ramming,vibrating,curing, shuttering etc.all as specified in any shape,position,thickness and finishing the top surface rough or smooth as specified and directed, including supply of all materials and all complete for concrete of M-15 grade with 20/40mm and down size graded crushed stone aggregates,including all labour and materials, as per approved drawing, specfications of this tender and directions of Enginer-in-Charge.

Supply of Earthed 33 KV grade shielded heat shrinkable H.V straight through jointing kit (Outdoor type) of make Reychem only including cable glands and lugs as per specification of this tender and directions of Engineer-in-Charge.

Supply of Earthed 33 KV grade shielded heat shrink H.V cable end termination kit (indoor/Outdoor type) of make Reychem only including cable glands and lugs as per specification of this tender and directions of Engineer-in-Charge.

Making of heat shrinkable straight through cable joint for high voltage application up to 33 kv to obtain sufficient length to connect end equipment,withstand thermomechanical stresses under short circuit condition,protect against ingress of moisture and enclose to prevent mechanical damage of the termination kit.

Making of heat shrinkable end termination for high voltage XLPE cable up to 33 kv to obtain sufficient length to connect end equipment,withstand thermomechanical stresses under short circuit condition,protect against ingress of moisture and enclose to prevent mechanical damage of the termination kit.

Laying of HT cables 33kv upto 185sqmm in ready trays/trenches/supported on structure/pull through pipes including supply and fixing of aluminium strip number tags, supply and fixing of G.I saddless and saddle bars etc.,including transportation from store/yard to site at the place of installation, unpacking,all labour and materials, as per approved drawing, specfications of this tender and directions of Enginer-in-Charge.

Fabrication,installation,testing and commissioning of 10.5m, 4-pole terminating structure for 33KV single circuit overheadline, line support/termination/bends etc.,including transportation of used rail poles from owners store/yard (used poles to be supplied byowner), installation of load break isolator, insulators, lightning arrestors, dropout fuses, O/H conductor to cable termination,, clamps and connectors, upper and lower bus bars, jumpers, with member for fixing wire guard, cable support, earth connection to earthing grid, civil foundation etc. The structure shall include all cross arms, bracings, foundation, GI barbedwire, anticlimbing devices, stay rods, base plates, anchor plates, painting etc., All structural material ,load break isolator,lightning arrestor and cement shall be supplied by Nalco free of cost however paint and required nut and bolt as required shall be under the scope of the party.

Installation,testing and commissioning of 630amp ,33 kv gang operated,pole mounted air insulated Load break switch with both electrical and mechanical interlock, mechanical interlock between earth switch and AB switch, mechanical interlock between two AB switch in such a way that when one in closed condition the other one should not be closed,operating rod,locking arrangement with locks,arcing horns, as per IE specification,including clamps and connectors,providing and fixing of MS channel supports,including all labour and materials, as per approved drwings certified by E-I-C,

Supply and laying of 40mm size gravel in one layer of 100/150 mm thick including dressing of soil surface and laying the aggregate in uniform layer and density, including all labour and material, as per directions of Enginer-in-Charge.

Design and fixing of guys with 7/10 SWG GI wire complete with all accessories such as strain insulator, thimbles, ground anchor/stub, turn-buckles, excavation,providig foundation, including all labour and materials, as per approved drawing, specfications of this tender and directions of Enginer-in-Charge.Nalco shall supply guy and accessories with required cement free of cost.all other grouting materials are under the scope of the contractor.

Supplying,fabricating and fixing of G.I wire mesh fencing with 5mm dia wirefactory welded G.Isquare wiremesh , conforming to IS:2721 fixed to 50x50x6 mm M.S angle support above ground level at 1.8 mtr height including supply of wire mesh ,stretcher bars, staples, painting etc.Required steel and cement shall be supplied by Nalco as free issue material however supply of wire mesh is under the scope of the vendor.

RRR PERESTROIKA