WBPHED/EE/AMD/ NIeT- 54 of 2024-2025/1

Amount

Supply and installation of voltage correction device.

Supply and delivery at site A.C. 3 ph. Oil cooled Voltage Stabilizer suitable for unbalanced input voltage (Make: Approved Make) a) Input:250-500 V 3ph. 50HZ, 4 wire b) Output, 415V + 1% 3ph.,50HZ. c) Capacity: 20 KVA. d) Auto manual switch IS - 9815 (I). e) Raise/lower push Button. f) Single lamps to indicate and limits of input. g) Voltmeter for input and output Voltage. (Manufacturing test certificate should be produced at the time of delivery) h) With U/V.O./V.O./L protection with contractor at output side, input MCB & Ammeter etc. ( TC /GC Needed )

Supply and delivery at site the following items

100 A , 4 pole , 415 V , TPN , ON load Change Over Switch ( Make -Approved make)

100 Amp 4 way copper BusBar Chamber Box by 16 SWG Sheet steel enclouser including porcelin chair etc. with painting complete as per direction of EIC.

100 A TPN Main Switch with Re-wireable fuse link within sheet steel enclosure.(Make -Approved make)

25mm², 1.1KV grade, 3.5 Core, Aluminum Conductor, Armored, XLPE Cable. The material must be confirmed to IS: 1554/7098(PART-1)1988( Make -Approved make)

Making brick built foundation with supplying of all required materials suitable for the above voltage stabilizer by( 4:1) cement mortar including holding down foundation bolts(If required) and plaster with net cement finish as per direction of EIC.

Installation of the above Voltage stabiliser of above supplied materials on the foundation incl. all connection complete,drawing the cable properly on GI cable tray on wall /as per direction of the EIC along with supplying all necessary item including testing complete.

Making joint of the cable by supplying compression type gland,thimple,socket, etc as per requirement and as per direction of EIC.

Making Earthing Arrangement

Earthing with 50 mm dia GI pipe 3.64 mm thick x 3.04 Mts. long and 1 x 4 SWG GI (Hot Dip) wire (4 Mts. long), 13 mm dia x 80 mm long GI bolts, double nuts, double washers incl. S & F 15 mm dia GI pipe protection (1 Mts. long) to be filled with bitumen partly under the ground level and partly above ground level driven to an average depth of 3.65 Mts. below the ground level as below:By ISI-Medium GI pipe.

Extra for providing masonery enclosure on the top of the earth electrode of overall size 86.36 cm x 86.36 cm x 46 cm deep (below Ground level) complete with cemented brick work(1:6) of 25 cm width duly plastered with cement morter (inside) CI hinged inspection cover of size 36.56 cm x 35.56 cm with locking arrangement, GI reducer including drilling of 46 nos. 12 mm dia holes on the GI pipe.

Extra for treatment of soil by using salt & charcoal or coke for plate electrode.

Connecting the equipments body to earth busbar including S&F 20 mm x 3 mm galvanised (Hot Dip) MS flat on wall/floor with GI saddles as required and connection to equipments incl. drilling holes, with bolts, nuts, washers etc.

Supplying & fixing earth busbar of galvanized (Hot Dip) MS flat 25 mm x 6 mm on wall having clearance of 6 mm from wall including providing drilled holes on the busbar complete with GI bolts, nuts, washers, spacing insulators etc. as required length of Busbar is 0.5 mtr.

Add GST @ 18%

Add CESS @ 1%

CHATTERJEE ENTERPRISE (BID ID -6310779)

SUBRATA BHADRA (BID ID -6310777)