SPL REPAIR TO BER ELECTRICAL INSTALLATIONS AT JALAPAHAR UNDER AGE(I) DARJEELING

Amount

Disconnecting HT & LT cables, Earthings and removing unserviceable transformer 350 KVA, 11/0.433 KV from existing base/ sub-station room including shifting to MES store yard complete all as dircted.

Disconnecting input and output cables, Earthings and removing unserviceable Voltage Stabilizer of 100KVA from Aloobari Pump House including shifting to MES store yard at Jalapahar Power House complete all as dircted.

Disconnecting input and output cables, Earthings and removing unserviceable Voltage Stabilizer of 75KVA from Jalapahar Pump House including shifting to MES store yard at Jalapahar Power House complete all as dircted.

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5mtr in depth for foundation. (Laying of under ground cables) in soft/loose soil and getting out all as directed.

Returning, filling in, including spreading, leveling, watering and well ramming in layers not exceeding 25cm in soft/loose soil all as directed.

Removal of surplus soil to a distance not exceeding 50 mtr and depositing where directed by Engineer –in- Charge at a level not exceeding 1.5mtr above the starting point all as directed.

M&L for sand cushioning for protection of PVC cable with approved sand of uniform thickness, laid dry, by filling in trenches and punning to proper required cover all as directed. (Note:-Punned thickness shall be considered in measurement).

Supply and fix precast concrete cable cover , class , HV , Type I flat size not less than 300 x 180 x 40 mm laid dry in trenches over under ground cables complete all as specified and as directed.

Supply, Laying & testing cable HT XLPE insulated screened PVC beded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts grade, of size 3 core 95 Sqmm complete all as specified and as directed.

Supply, Laying & testing cable LT XLPE insulated screened PVC beded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 1100 volts grade, of size 3.5 core 300 Sqmm complete all as specified and as directed.

Supply and fix cable end termination joint kit heat shrinkable outdoor suitable for 11KV 3 core 50-95 Sqmm HT XLPE armoured UG cable complete all as specified and as directed.

Supply and fix cable end termination joint kit heat shrinkable indoor suitable for 11KV 3 core 50-95 Sqmm HT XLPE armoured UG cable complete all as specified and as directed.

Supply, installation, testing and commissioning of copper wound step down (11/0.433KV) transformer indoor type oil cooled with standard fittings three phase 4 wire with off load tappings on HT side to vary secondary voltage within limit all as per IS: 1180 Level 2 of capacity 315KVA complete with all standard fittings are as per following specification :(i) Dyn11 Connection (Vector Group) (ii) 6 steps / 7 position(iii) Total loss not exeeding 1.025KW at 50% load and 3.1 KW at 100% load(iv) 4.5% inpedence at 75° C (v) Standard fittings are stem type OTI, Explosion vent, Silica gel breather, oil level gauge, Roller, Earthing terminal, sampling valve, filter valve including first filling of transformer oil complete all as directed.

Supply and installation of copper wound automatic operation Voltage Stabilizer confirming as per BIS 9815:Part1:1994 three phase naturally oil cooled indoor, digital display type & designed for input variation between 360V to 480V with output voltage at 415V with accuracy ± 2.5% with rated frequency 50Hz and speed of correction 8 Volts per second for single phase and 20V/Second for phase to phase with efficiency not less than 95% and suitable for 24X7 duty cycle of capacity 75KVA complete with following protections:(i) Over load protection(ii) Short Circuit Protection(iii) High/Low voltage cut off(iv) By pass arrangement in case of emergency(v) Single Phase sequence change protection(vi) Ingress Protection upto IP 42/IP 45 complete all directed.

Supply and installation of copper wound automatic operation Voltage Stabilizer confirming as per BIS 9815:Part1:1994 three phase naturally oil cooled indoor, digital display type & designed for input variation between 360V to 480V with output voltage at 415V with accuracy ± 2.5% with rated frequency 50Hz and speed of correction 8 Volts per second for single phase and 20V/Second for phase to phase with efficiency not less than 95% and suitable for 24X7 duty cycle of capacity 100KVA complete with following protections:(i) Over load protection(ii) Short Circuit Protection(iii) High/Low voltage cut off(iv) By pass arrangement in case of emergency(v) Single Phase sequence change protection(vi) Ingress Protection upto IP 42/IP 45 complete all as directed .

Supply & fixing single core PVC insulated flexible FR unsheathed industrial multistranded annealed electrolytic copper conductor of size 25 Sqmm, 1100V grade complete all as specified and directed.

Earthing complete with galvanized steel earth plate electrode 600x600x6 mm thick buried directly in ground (earth pit not less than 2.25 m deep below normal ground level) with top edge of the plate not less than 1.5 m below normal ground level connected to galvanized earth strip 32 x 6 mm (up to 7.5 m in length from earth plate ) by means of bolts and nuts checknuts and washers of galvanized iron or steel all as specified and shown in electrical plate no 3 of SSR part I including necessary excavation and earth work in any type of soil PCC 1:3:6 type C1 chamber with RCC 1:2:4 type B1 40 mm thick cover with MS rod 8mm dia 150mm long reinforcement, watering funnel, 40 mm dia medium grade for protection of earth electrode 20 mm dia for watering all as specified and directed and tested on completion complete all as specified and as directed..

All as per ser Item No. 17 here-in-before but using copper plate of size 60x60cmx3.15mm thick electrode and 20X3mm copper strip as earthing lead complete all specified as directed.

M & L earth continuity conductor or main earthing lead foxed to wall or burried in ground of size 25 X 3mm aluminium strip complete all as specified and directed.

Fabrication of Transformer mounted trolley for 315/500KVA Transformer of size 3000(L)x2100(W)mm made with MS Channel 150x75mm and 75x40mm,sheet for floor shall be4.0mm thick and for dala 2.90mm thick, angle framing for side dala shall be 40x40x6mm thick as per requirement including Painting with two coat of synthetic enamel paint over a coat of primer, having tyre size 7.50x16 - 04 Nos including axle,hub with bearing, wheel rim, 04 nos support Jack at all corners and provision for tying of HT and LT cable. The trolly shall have turning angle up off 45 degree on both sides with the help of towing hook complete all as directed.

Note 1:- (Applicable for all parts/items) : The biidders/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.

SANJAY KAUSHIK

Janata Enterprises

Damdoo Bhutia

SANJAY SAW MILL

M/s AHMED ENGINEERING

S K ENTERPRISES

KAMLESH ENTERPRISE