installation of 630 kva , 33kv/415v transformer at jholaguda pump house of nalco mines , damanjodi . , 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 nalcos 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 .