PROVN OF E M SERVICES AT LIKABALI MIL STN. (5th CALL)

Amount

Supply, installation testing and commissioning 315 KVA outdoor type transformer, step down 11KV/433V,level-3, 3 Phase 50 C/S AC double wound, core type copper wound, oil immersed naturally cooled (ONAN) with external cooling tubes (radiator type), delta/star connection on primary side (11KV) , and star connection on secondary side (433V) in accordance with vector symbol DYN-11 and tap changer from +7.5% to -7.5% @2.5% each (i.e. +7.5% ,+ 5%,+ 2.5%,0.0%,-2.5%, - 5%, -7.5% tapping) to be changed by means of manually operated OFF LOAD tap changing gear with necessary locking arrangements. The transformer shall be manufactured by OEM in accordance with IS standard IS:2026 and IS:1180 with latest amendments (2021 or till date) transformermust be "BIS marked & BEE Star labelled".Transformer copper/iron losses as per IS: 1180 level-3 tempeture rise shall be as per IS -1180.Transformer shall be painted with two coat of epoxy paint as per IS-632. transformer shall be complete with the following/superior specification and not less than following :- (a) Cable entry box for LT on secondary side for 3.5 core 240 Sqmm XLPE cable and HT 3 core 95 Sq mm on primary side including fixing arrangement as specified and directed by Engineer-in-charge. (b) Oil conservator with filling cap, drain valve and oil level gauge. (c) Dehydrating breather with connecting pipe, first fill of dehydrating agent and oil seal. (d) Explosion relief vent mounted on tank with double diaphragm and equiliser pipe connection to conservator air space (pressure release device). (e) Air relief plug. (f) Shut off valve between the conservator and Bucholz relay. (g) Thermometer pocket. (h) 100 mm dial type temperature indicator having range 0-120 degree C vapour pressure type with maximum reading pointer/Max temp indicator and resetting device with alarm/trip contact and additional contacts for switching ON or OFF the colling fans. (j) Two earthng terminals on tank and tank cover with lugs to suit 32 mm x 6mm GI strip. (k) Rating and diagram plate.

ITEM NO 1.00 CONTD... (l) 100 mm dial type thermometer for winding temperature indicator having range 0 - 120 degree C vapour pressure type with maximum reading pointer/Max Temp indicator and resetting device with alarm/trip contact and additional contacts for switching ON or OFF to cooling fans (m) Drain valve with threaded adopter. (n) Filter valve with threaded adopder (top and bottom). (o) Sample valve. (p) Inspection covers. (q) Lifting lugs. (r) Four plane rollers, bi-directional, hinged type at the bottom for shifting transformer from one place to another place. (s) Top cover lifting eyes. (t) Double float Bucholz relay with trip and alarm contact. (u) Extra bushing outside the cable box for providing independent earthing. (v) First fill of transformer oil as per IS:355 (LATEST) (w) Foundation of suitable size in and including PCC platform (PCC 1:3:6) including ramp as per manufacturers recommendations. (x) Magnetic core made out from prime grade of M4 or better. (y)System highest voltage 12 KV at the HV side (Primary winding side). (z) percentage inpedance as per IS:1180. (aa) insulation level :HV Power frequency (KV rms)28 KV and impulse withstand voltage (KV Peak) 75 kVp (ab) Manufacturer shall be NABL accredited testing laboratory.

Supply, laying and testing HT XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured, electric power cables (heavy duty) 11000 volts grade 95 sqmm 3 core with stranded aluminium conductor laid in pipes,trenches/ ducts, on poles etc complete all as specified and directed.

Excavation in trenches for laying under ground cable, errection of poles and stays in any type of soil not exceeding 1.5 meter wide and not exceeding 1.5 meter deep and getting out in soft/loose soil complete all as specified and as directed.

M & L for Sand cushioning to under ground cable in trenches/existing cable trenches/ducts in layers of 8 cm deep before laying the cable and 15 cm deep after laying and stretching the cable complete all as specified and as directed. Note: Punched thickness of 18cm will be measured & paid.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1, flat of size 300mm x 180mm x 40mm complete all as specified and as directed.

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

Removing surplus excavated material to a distance not exceeding 50m and depositing at a level n.exc 1.5 m meter above the starting point complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for outdoor termination , heat shrink type, joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size 95 sqmm complete all as specified and as directed.

Supply and fix HT 11 KV, out door type Triple pole, mechanically operated gang operated air-break switch suitable for horizontal or vertical mounting fixed type . Mounted on insulator and steel frame with opearating mechanism worked from ground level, for current rating upto 400 Amp complete with 9 Insulators complete all as specified and directed.

Supply and fix HT 11 KV Expulsion fuse suitable for 400 Amps GOD complete all as specified and as directed.

M&L Earthing with Galvanised Earth Plate Electrode 600x600x6.0mm thick, buried directly in Ground vertically to a depth not less than 2.25 Metre below Ground Level with Top Edge of Earth Plate at depth not less than 1.50 Metre below normal Ground Level, connected to Galvanised Earth strip of Size 32x6.0 mm by means of Bolts, Nuts, Check, Nuts and Washers of Galvanised Iron or Steel, connected to Test Point upto 7.50 Metre away from Earth Electrode situated, Earth Plate surrounded by a packed thickness of Char Coal or Coke Dust mixed with Common Salt in alternate layers of not exc.150mm thick, PCC Pit in Cement Concrete 1:3:6 (20mm graded stone aggregate) and Pre-cast RCC Cover Slab of Size 350x350x50mm in Cement Concrete 1:2:4 (20mm graded stone aggregate), reinforced with 10mm dia TMT Bars @ 100mm Centre to Centre in both ways, GI Wire Mesh, PGI Funnel with GI Watering Pipe 20mm bore (dia) Medium grade including necessary Excavation in Soft/ Loose Soil, Returning, Filling in and Removal of surplus Spoil upto a distance of 50.00 Metre and all as shown in Electrical Plate No. 3 of MES Schedule Part-I and Testing on Completion complete all as per specified and as directed.

M&L Earthing with Copper Plate Electrode 600x600x6.0mm thick, buried directly in Ground vertically to a depth not less than 2.25 Metre below Ground Level with Top Edge of Earth Plate at depth not less than 1.50 Metre below normal Ground Level, connected to Copper Earth strip of Size 20 x 3.15 mm by means of Bolts, Nuts, Check, Nuts and Washers of Galvanised Iron or Steel, connected to Test Point upto 7.50 Metre away from Earth Electrode situated, Earth Plate surrounded by a packed thickness of Char Coal or Coke Dust mixed with Common Salt in alternate layers of not exc.150mm thick, PCC Pit in Cement Concrete 1:3:6 (20mm graded stone aggregate) and Pre-cast RCC Cover Slab of Size 350x350x50mm in Cement Concrete 1:2:4 (20mm graded stone aggregate), reinforced with 10mm dia TMT Bars @ 100mm Centre to Centre in both ways, GI Wire Mesh, PGI Funnel with GI Watering Pipe 20mm bore (dia) Medium grade including necessary Excavation in Soft/ Loose Soil, Returning, Filling in and Removal of surplus Spoil upto a distance of 50.00 Metre and all as shown in Electrical Plate No. 3 of MES Schedule Part-I and Testing on Completion complete all as per specified and as directed.

M&L Earthing with Galvanised Earth Plate Electrode 600x600x6.0mm thick, buried directly in Ground vertically to a depth not less than 2.25 Metre below Ground Level with Top Edge of Earth Plate at depth not less than 1.50 Metre below normal Ground Level, connected to Galvanised Earth lead 4 mm dia by means of Bolts, Nuts, Check, Nuts and Washers of Galvanised Iron or Steel and Earth Wire protected with and including GI Pipe 15mm bore (dia) Light grade, connected to Test Point upto 7.50 Metre away from Earth Electrode situated, Earth Plate surrounded by a packed thickness of Char Coal or Coke Dust mixed with Common Salt in alternate layers of not exc.150mm thick, PCC Pit in Cement Concrete 1:3:6 (20mm graded stone aggregate) and Pre-cast RCC Cover Slab of Size 350x350x50mm in Cement Concrete 1:2:4 (20mm graded stone aggregate), reinforced with 10mm dia TMT Bars @ 100mm Centre to Centre in both ways, GI Wire Mesh, PGI Funnel with GI Watering Pipe 20mm bore (dia) Medium grade including necessary Excavation in Soft/ Loose Soil, Returning, Filling in and Removal of surplus Spoil upto a distance of 50.00 Metre and all as shown in Electrical Plate No. 3 of MES Schedule Part-I and Testing on Completion complete all as per specified and as directed.

Supply, Installation, testing and commissioning of Servo controlled Voltage stabilizer (confirming to BIS 9815 (Part-1) :1994, reafirmation 2019 latest version, three phase, four wire (RYBN), 50 Hz, Naturally Oil cooled, indoor unbalanced type, copper wound,metallic body dulypowder coated with lifting hooks, digital display type,relay free smooth and silent operation with 1st filling of Transformer oil upto level having following specification:- (a) Capacity 300 KVA (b) Type-Suitable for unbalnced load and unbalanced input (c) Input voltage- 360 V - 480 V, Input frequency-50 Hz (d) Output Voltage - stabilized at any designed/desired voltage 415/+-1% (e) Rated frequency- 50 Hz (f) Wave form distortion-Nil (g) Response time-not to exceed 20 milli seconds (h) Sensitivity-(+/-) 1% (j) Rate of correction- Not lessthan 6 Volt/second between phase and neutral (k) Efficiency-more than 95% (l)Type of load- Three phase unbalanced type (m) Metering-Digital display Voltmeter/ Ammeter with multi functional meter (n) Opearting Temperature- For indoor use upto max ambient temp + 55 degree C (o) Dimmer rating (p) Class of insulation- Class F (q) Mode of operation- Automatic/ Manual (r) Winding Temperature rise- Max 55 degree C (10 degree C above operating Temp)

BOQ Item No 15 Contd/... (s) Transformer Oil-IS 335 marked (t) Core- CGRO M4 grade/CRNO (Cold Roll Grain Oriented)/ (Cold Rolled Non-Oriented) (u) Auto Transformer (Variac)- 100 percent Copper wound Electrolytic Grade (v) Losses- As per IS Norms (w) Power factor- Not lessthan 0.95 (x) Protection:- (i) Overlod Protections (ii) Short Circuit Protections (iii) High/ Low Voltage cut off (iv)By pass arrangement in case of emergency (v)Single phase sequence change/phase fail protection (vi) Standard fitting & Accessories Ex-Marking plate, lifting lugs, CI Rollers, Earthing Terminals etc cable box complete all as specified and directed.

Material & Labour for Brick work with sub class ‘B’ old size bricks, straight or curved on plan exc 6m mean radius built in cement mortar (1:6) complete all as specified and directed.

M&L 15 mm thick cement plaster in cement mortar (1:6) on fair faces of brick work incl finished even and smooth without using extra cement complete all as specified and directed.

M&L for preparation of newly plastered surfaces of walls & applying two coats of cement base paint over a coat of alkali-resistant priming paint complete all as specified and directed.

S&F Pre-painted galvalume aluminum zinc coating GI based corrugated steel sheet 0.50mm thick of colour having tensile strength of 550 Mpa as roof coverung/clading to wall , fixed with self tapping screws complete all as specified and directed.

M & L for preparation of new steel surfaces of any description exc. 10cm width or girth & applying two coats of synthetic enamel paint over a coat of red oxide primer all as specified and directed.

Material and labour rolled mild steel in framed work as in roof members, truss, purlins etc of angle or other section with gusset plates, rails, braces, etc., complete, drilled for fixing of steel sheeting or other covering, Doors etc. to be prepared for hanging or sliding with and including either hooks and hinges or steel hanging door fittings (exclusive or steel sheeting or other covering, running rails and guides) and hanging & guard bars also fastening etc. confirming to Fe 410-W (gde-E-250) quality-A and fixing complete all as specified and as directed.

Supply, laying and testing LT XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade 240 sqmm 3.5 core with stranded aluminium conductor laid in pipes,trenches/ ducts, on poles complete all as specified and directed. complete all as specified and directed complete all as specified and directed.

M & L for laying of bricks locally available sub class 'B' bricks (old size) for cable protection cover laid flat and dry in trenches over the cable perpendicular to the direction of cable all as directed.

Supply, installation, testing and commissioning factory made LT feeder pillar box Outdoor type platform mounted of size 600X500X450mm suitable for 415 Volts 3 phase 4 wire system 50 Hz supply having copper/ Auminium bus bar 1000 Amps for phases and neutral, install on porcelain / epoxy insulator. The panel shall be dust proof, vermin proof (IP54) and painted with two coats of syntheitc enameled paint over a coat of red oxide primer and made out of 3.15mm CRCA sheet self moulded type and 50x50x6 mm angle iron frame front and rear opening with double shutter and locking arrangement with 50 mm lock make Navtal/Harrison and including grouting of panel with necessary PCC work , CPRI approved complete all as specified. The scope of work includes the following accessories:- (For Main LT Panel) (i) Onload change over switch 4 pole ,400 Amps, 415 V - 01 No (ii) Microprocessor and thermal magnetic release MCCB 400 Amp, 4 pole, 36 KA - 01 No. (iii)Microprocessor and thermal magnetic release MCCB 250 Amp, 4 pole, 36 KA - 04 No. (iv) Volt meter 0 to 500 Volts, Square flush pattern, digital type – 01 No (v) Amp meter square flush pattern 0 to 200 Amps digital type -01 No. (vi) Indicating lamp LED type one set in incoming phases. (vi) Indicating lamp LED type one set in incoming phases. (vii) Internal wiring with PVC insulated copper conductor multi stranded cable 1100 Volt grade IS 694 marked of appropriate gauge including all copper lugs (viii) Connection from MCCB to Busbar shall be of solid Aluminium conductor (ix) MCCB shall be provided with suitable spreader of aluminium conductor for fixing of incoming cable

S & F MCB distribution board, SPN 4 way, 240 Volts AC, double door type of sheet steel phosphotised powder painted with 200 Amps, neutral bars, earth bar complete all as specified and directed.

S & F RCCB four pole 100 mA, 63 A, 240 volts, complete all as specified and directed.

M& L for Wiring for submain wiring alongwith with the 2 X 6 Sqmm + 1 x 6 Sqmm earth wire of FR PVC insulated copper conductor single core cable in surface / recess in PVC Conduit etc complete all as specified and directed.

S & F Single phase Under Voltage / Over Voltage protection relay aux supply Voltage between 88 V to 264 V AC/DC complete all as specified and directed.

S & F Surge Protection Device Single phase 2 pole 230 Volt, designed for superior safety upto 1.3 kV Voltage protection complete all as specified and directed.

M&L for air termination single pointed aluminium rod of 12 mm dia and 300 mm long mounted on GI pipe complete all as specified and directed.

M&L for test point termination block made of gunmetal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 Nos 8 mm dia 25 mm long hex head screws complete all as specified and directed.

M&L for aluminium strip 25x3 mm with PVC saddle and fixing screws etc for roof conductors and down conductors above ground complete all as specified and directed.

M&L for GI Strip 32x6 mm with saddle and fixing screws etc from test terminal block to earth pit complete all as specified and directed.

S&F GI tubing 40 mm bore light grade complete all as specified and directed

SAGGI ELECTRIC COMPANY (BID ID -3456475)

MANASEE (BID ID -3456186)

M/S SINGH TRADERS (BID ID -3456299)

M/s Mrinal Dowarah (BID ID -3456345)

M/s PRABIR ENTERPRISE (BID ID -3461397)

M/S A K BROTHERS (BID ID -3461363)