REPLACEMENT OF 6.6KV SWITCH BOARD-240 AT US 10, ALUMINA REFINERY, DAMANJODI

Amount

Dismantling of HT switch board no- 240 ,6.6KV,250MVA switch board panel , in shipping section ( panel wise) at US 10, make GEC including disconnection of power and control cables in each panel and removal of existing panel from the foundation & shifting the panels from US 10 to site location or Central store including trasportation as per direction of Engineer in -charge. All labour & materials as required shall be under the scope of the party.The party has to make unloading arragement from US10 , 2rd floor to ground floor. The party has to make passage for shifting the panels from US 10 MCC rooms to outside. The job need to be executed sectionwise and other section shall be in charged condition. The job must be executed in time bound period. ( The switch board comprises of the following panels. a. Transformer Incomer and Bus Coupler (MOCB) -03 Nos b. VCU Motor feeders- 10 Nos, c.Line PT -02 No and d. Incoming Cable Termination Panel - 02 nos )

Erection, commissioning of new 6.6KV HT panel of L&T make & each panel weight of 800kg approx & size, W-600 mm, D-16000mm, H-2500mm which comprises of VCB as Incomer, VCUs as Motor feeders and PT panel including all accessories ,metering ,protection, alarms and announciations etc after neccesary foundation work in the existing location, including grouting, making holes, masonary works etc as required complete including shifting of panel from Central store to US 10 , 2nd floor , with transportation etc as per direction of Engineer in Charge. The panels must be shifted through truck not Hydra and transportation is under the scope of the party.All labour, materials shall be arranged by the party.Panel bus bar inter connection for Power , control circuits etc complete and reconnection of power cable ,control cable etc to the respective panels are under the scope of the party.Fabrication materials like MS channel/angle shall be supplied by Nalco.The party has to extend necessary man power assistance during testing & commissioning of panels. The new 6.6 KV,630A draw out type switch board comprises of the following panels. a. Transformer Incomer & Bus Coupler (draw out type VCB) -03 No b. Motor feeders( Draw out type VCU) - 10 Nos, c. Line PT -02 Nos and d. Bus PT-02 nos

Relocation / motor feeders from section -01 to section -02 of HT-240 or to other substation( US-13) and back after erection of new panels including disconnection and connection of power cable and control cables , setting respective feeders as per designation in the board,The job has to be done as per site requirement with time bound shut down period and as per direction of Engineer in charge. The re routing of power and control cable in the cable celler including installation of power JB and control JB as per requirement is under the scope of the party.

Supply & making end termination, glanding,lugging of cable 11KV/6.6KV of size3cx240 and upto 3cx300 sq mm armourmed Aluminium XLPE cable. Cable lugs shall be supplied by Nalco as free issue item.Connection of the terminated cable to the 6.6 KV panels after making necessary holes in cable glanding plates for cable entry with fabrication of required supports and saddling /clamping for the cables shall be done as per direction of Engineer in charge.Supply of end termination kit should be Indoor type, push on, heat shrinkable, 11KV UE grade , IS marked and of M-seal, Rachem, Birla 3M make. Saddle/Clamps and nut,bolts etc will be in the scope of the party.

Supply of straight through jointing kit & making straight through jointing if required , glanding,lugging of cable 11KV/6.6KV of size3cx240 and upto 3cx300 sq mm armoured Aluminium XLPE cable. Cable lugs shall be supplied by Nalco as free issue item.The jointed cable need to be connected in 6.6 KV panels after making necessary holes in cable glanding plates for cable entry with fabrication of required supports and saddling /clamping for the cables shall be done as per direction of Engineer in charge.Supply of Staright through jointing kit should be Indoor type, push on, heat shrinkable, 11KV UE grade , IS marked and of M-seal, Rachem, Birla 3M make. Saddle/Clamps and nut,bolts etc will be in the scope of the party.

Fabrication of 6.6KV switch board base frame as required with MS Channel of Size 100x 50x 6 and angle of size 65x65x6 mm , including masonary work, grouting , earthing connection etc as required as per direction of Engineer incharge. Fabrication materials shall be supplied by Nalco.

Supply, fabrication and laying of GI earthing strips of the following sizes for erection of 6.6KV switch boards and connecting to grid earth etc as required as per direction of Engineer in charge.

a. GI earth strips of size 75 x10mm

b.GI earth strips of size 40 x 6 mm

Laying/Rerouting of HT/LT cable of existing cables at US-10 as per site requirement and location of feeders including clamping of cables in the existing cable tray.Supply of clamps nuts and bolts will be in the scope of theparty. Cables shall be issue to the party from Central store and transportation is under the scope of the party.

a. 6.6KV/11KV XLPE cable of size 3x240 uo to 3x300sqmm

b. Control cable upto 24cx2.5 sqmm

Arrangement of statutory clearance for new installation including arrangement of all necessary documents,facilitation of inspection procedure and compliance to audit observation as required by CEA.

RRR PERESTROIKA

SUSHANTA ENGINEERS