Installation of 630 KVA, 33KV/415V Transformer at Jholaguda pump house of Nalco Mines, Damanjodi.

Amount

Transportation and Installation of 630 kva,33kv/415 volt power transformer , termination of all HT , LT and control cables,supply and laying of GI earth flat and connection of all earth points with nearest earth pit,laying of separate earth flat from transformer neutral bushing to a separate earth pit., filling and top up transformer oil, at jholaguda pump house .Loading of transformer and its accessories and shifting from Mines to jholaguda pump house and unloading at jholaguda with partys own arrangement of hydra , truck ,tools tackles including service support (weight-8 ton approx) and as per direction the E-I-C.

Transportation and installation of 630 Amp,33kv HT Vaccum circuit breaker , termination of all HT , LT and control cables,laying of GI earth flat and connection of all earth points with nearest earth pit at jholaguda pump house .Loading of breaker and shifting from Mines to jholaguda pump house and unloading at jholaguda with partys own arrangement of hydra , truck ,tools tackles including service support and as per direction the E-I-C.

Earth work Excavation by mechanical means or manual in foundation, earth pits ,pole foundation,stay foundation,diversion of drain,cable trenches and other Misc. earth work in all type of soil including dressing of soil and disposal of surplus excavated soil with a lead distance of 50 mtr(blasting probhibited) and as per direction of E-I-C.

Laying of HT cables of different sizes up to 185 sqmm and voltage grade up to 33 kv in ready trays/trenches/supported on structure/pull through pipes with suitable clamp , supply and fixing of aluminium strip number tags, supply and fixing of G.I saddless and saddle bars etc and refiling of trench with sand cushioning and protective cover .,including transportation from Mines store/yard to site at the place of installation, unpacking,all labour and materials, as per specfications of this tender and directions of Enginer-in-Charge.

Laying of LT cables of different sizes up to 300 sqmm and voltage grade up to 1.1 kv in ready trays/trenches/supported on structure/pull through pipes with suitable clamp , supply and fixing of aluminium strip number tags, supply and fixing of G.I saddless and saddle bars etc and refiling of trench with sand cushioning and protective cover .,including transportation from Mines store/yard to site at the place of installation, unpacking,all labour and materials, as per specfications of this tender and directions of Enginer-in-Charge.

Installing of GI cable trays of different sizes(up to 450 mm) in convenient section ,joined with connectors, clamped with suitable supports ,including transportation from Mines store/yard to site at the place of installation, unpacking,all labour and materials, as per specfications of this tender and directions of Enginer-in-Charge.

Supply ,installation and testing of chemical earthing system by Excavation of earth pit in hard soil of size 10 ft. X 2 ft. X 2 ft.or bore hole of size 6 inchx10 feet , Transportation of all earthing materials and hardwares to site, prepareparetion of chemical (GEM)graphaite base,OBO or Erico make,Minimum 50 kg per pit (bentonite base not acceptable) with proper ratio and filling the chemical into the earth pit with positioning of High conductive copper bonded earth electrode of 20 mm size (OBO or Erico make) at the center of the pit , resurfacing with black cotton soil, connection of electrode with supply of ss or copper clamp with GI strip between earth pit and equipment,complete with brick chember and RCC cover.Party has to carry out the Numbering of the earth pit painted with synthetic enamel on the top cover of the pit with yellow body and black letter .supply of chemical,copper bonded earth electrode ,Earthing materials shall under the scope of the vendor however cement and GI flat shall under Nalco's scope.

Revertment of cable tray support 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.

Structural Fabrication and installation of MS base frames, supports for swithgear and brackets for miscellaneous electrical equipments, and cable tray supports out of rolled MS section, pipes,plates etc., including transportation,welding, bolting, rivetting, supply of necessary anchor bolts and grouting etc., supply of paint and applying one coat of anti-rust primer and two finished coats of approved synthetic enamel paint including breaking walls, floors, etc. for structures as required , including all labour and materials as per specfications of this tender and directions of Enginer-in-Charge.,Nalco shall issue structural steels as free issue material.

Providing and laying plain cement concrete for all depths below and up to a plinth level in foundations 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 20mm 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. ( cement under scope of Nalco.)

supply and making of heat shrinkable indoor end termination for high voltage ,3 core aluminium XLPE cable(50-185 sq mm) 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(Raychem make only).as per the specification of the tender and direction of E-I-C.

supply and making of heat shrinkable out door end termination for high voltage ,3 core ,Aluminium XLPE cable(50-185 sq mm) 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(Raychem make only).as per the specification of the tender and direction of E-I-C.

Installation,testing and commissioning of 1250 amp ,33 kv gang operated,horizontal double break 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 supply of clamps and connectors,Bolt&nuts fixing of MS channel supports,including all labour and materials, as per approved drwings certified by E-I-C,only structural steel and AB switch assembly shall issue to the party by Nalco as free issue material.(total weight 2 ton approximately)

Supply and installation of cable markers as per std.7-51-0301,for underground cableruns with 14 SWG enamelled steel plate with white lettering on jade green background inclusive of providing and fixing supports,including all labour and materials, as per approved drawing, specfications of this tender and directions of Enginer-in-Charge.

SUNIL KUMAR BISWAL

SUSHANTA ENGINEERS