SPECIAL REPAIR TO HT CABLE AT AF STN BAGDOGRA UNDER GE (AF) BAGDOGRA

Amount

Note 1: (Applicable for all parts/items) : The bidders/ contractors are advised to read tender document, all drawings & all corrigendum/amendments and general condition of contracts before entry/quoting the rates. Note 2:- Attention to bidder is hereby invited to upload revised BOQ if published during their bid submission. Uploading of incorrect/ pre-revised BOQ shall be treated as non bonafide and rejected. Fixed credit has been given in technical documents which shall be taken into account during acceptance of bid/tender.

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth and getting out in soft / loose soil complete all as specified and as directed.

Returning, filling in including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick complete all as specified and as directed.

Removal of excavated material [soil] to a distance not exceeding 50 m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed.

M&L clean and dry sand (unwashed) in trenches around the cable for cushioning complete all as specified & directed. Note :- Sand cushioning 8cm before laying the cable and 15cm after laying the cable & punned down 18cm and punned thickness shall be measured and paid.

Supplying and laying unreinforced precast cement concrete cable covers, Class HV, type 1 size 300 mm x180 mm x 40mm in trenches for cable protection, embossed with "ELECTRIC" on the top surface complete all as specified and as directed.

Taking down of HT cable complete with all connected items complete all as specified and directed.

Supply, laying and testing XLPE insulated, screened, PVC bedded galvanised steel strip armoured electric power cable (Heavy duty) with aluminium conductor, 11000 Volts grade lay in trenches, ducts, along pole, along Transformer etc, cross sectional area 95 Sqmm 3 Core complete all as specified and directed.

Supply, jointing and testing in replacement of indoor type jointing kit cold shrinkable type, Earthed suitable for HT 11 KV XLPE aluminium conductor cable of size upto 50 sqmm to 95 Sqmm 3 core including making connection complete all as specified and as directed.

Supply, laying or fixing in replacement of 150 mm bore Galvanised steel tube, mediun grade for passing of HT cable protection on floor/wall/trench/bore under road with all fixing accessories complete all as specified and directed.

Taking down of HT Panel and VCB complete with all connected items all as specified and directed.

Supply, installation, testing and commissioning of outdoor type 11 KV, 630 Amp dust proof and vermin proof, Load break switch with earth switch having rated current 630 Amps, 03 pole, 50Hz, 3.15 mm CRCA Sheet outer body and compartment totally enclosed, single bus bar for each phase, floor mounting, metal clad, outdoor extensible type flush mounted, horizontal / vertical isolation, closing / tripping spring, trip free operating mechanism with closing and tripping push buttons and mechanical breaker, manually operated, one incoming and one outgoing without metering module and comprising of following standard fittings and accessories:- Specification for LBS (i) Bus bar chamber with 3 phase copper bus bar 1250 Amp rating duly insulated- 01 set (Set of three) (ii) Air break switch confirming to IS-9920 (iii) Paint Shade of outer or inner compartment confirming to IS-5 (iv) Degree of Protection - IP55 (v) Short time rating current - 40 KA/Second (vi) Electric clearence - (min) (a) Phase to Phase- 127mm (In Air) (b) Phase to Earth - 77mm (In Air) (vii) Power frequency withstand voltage - 20/23 KV (viii) Dimension tolerance as per IS-2102 Coarse (ix) Mechnical interlock between main switch and Earth (x)Closing and opening Circuit switch (xi) Operating Handle/ Charging handle (xii) Ped lock arrangement (xiii) Heat control switch (xiv) Space heater with thermostat (xv) Operating counter (xvi) Rating of earth switch 630A (xviii) Auxiliary Switch - 4 NO+4 NC (xix) Advance contact - 2 NO+2 NC (xx) Electrical Interlocking :- If Isolator is open or earth switch is operated, HT CB can't be close. Only when Isolator is closed, the HT CB can be ON. HT Breaker shall trip when Isolator advance contact is operated.

M & L for replacement of Earthing complete with galvanized earth plate electrode 60 cm X 60 cm X 6.30 mm thick buried directly in ground (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of plate not less than 1.5 mtr below ground level connecting to the GI strip 32 x 6mm, by means nuts, bolts, check nuts and washer of the GI strip protected by GI light grade pipe 40 mm incl provision of concrete pit in PCC (1:2:4) type B-1 using 20 mm graded stone aggregated with 40 mm thick cover with RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg / Sqm) and frame of angle iron 25mm X 25 mm X 3mm with lugs 2 Nos and with 6 mm dia MS bar handle made to shape, GI light grade 20 mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge of earth plate, common salt and charcoal filling, taste point made out of phosphorus bronze with fixing arrangement, funnel, wire mesh and earth work in hard/dense soil, returning filling in and removal of surplus soil to a distance not exceeding than 50 mtr, all as per electric plate No 3 of SSR Part I 2009 and connection to earth test point all as specified incl testing on completion”. Note:- (i) GI Strip 32 x 6 mm upto 7.5 mtr from earth plate and protection pipe 40 mm dia shall deemed to be included in the quoted rate. (ii) Earth result shall be forwarded to Engr-in-Charge for record after complition of work.

M & L for Boring of holes under road, pavement, hard standing by trenchless technology using ultra sound technique and necessary machine for underground cables suitable for 0.4 Mpa working pressure complete all as specified and directed.

Supply, installation, testing and commissioning of HT 11 KV, 3 phase 50 Hz, indoor type, totally enclosed metal clad switchgear complete with Vacuum Circuit Breaker having rupturing capacity 250 MVA, overload and earth fault protection, ammeter, voltmeter and of rating upto 400 Amp complete all as specified and directed.

M& L for HT UG cable route indicator, Precast Mile Stone type, chamfred and round on edge at one side and rectangular on other side of block size 600mm x 300 mm x 75 mm of PCC 1:4 type B1 fixing at suitable distance, engraved with HT Cable and red colour painted complete all as specified and directed.

ENGINEERING AND CONSTRUCTION CO.

SHRI SANJAY KUMAR GUPTA

M/S SUNNY ENTERPRISE

M/s Om Prakash Agarwala

M/S BENGAL ENGINEERING ENTERPRISES

SARKAR ENGINEERING CO.