SPL REPAIR REPLACEMENT OF PS TANK AT 101 AREA DM LINE MH LOWER BLOCK AT MIL STN AND PROVN OF 30 KVA DG SET AT MDC SHILLONG UNDER GE SHILLONG

Amount

Dismantling and taking down old serviceable /Unserviceable pressed steel plate of size 1.25x1.25x5/6mm thick (top, bottom and side of tank) including nuts and bolts from existing over head pressed steel tank upto 15m height staging by unscrewing/ opening/ cutting the nuts & bolts including jointing materials and stacking serviceable materials (duly cleaned) properly in safe custody for re-use at site and removing unserviceable materials from site of works complete all as directed and as specified by Engr-in-charge. (Note: Rates quoted are inclusive of scaffolding and other required arrangements for dismantling/fixing of plates/stagingand painting)

Supply and fixing pressed steel plate of size 1.25x1.25 mtr 5/6 mm thick (top, bottom and side of tank) for over head pressed steel tank upto 15m height staging with and including provision of nuts & bolts jointing materials such as good quality rubber gasket lead wool wire, black putty etc to make the joints leak proof including arc welding if necessary complete all as directed and specified by Engr-in-charge. (Note : Servicable pressed steel plates/sheet obtained frim item no 1 above shall be re-used under this item.

S & F in repairs structural mild steel joist, channel, angle, plain plates or 'Tee' section including cutting, drilling, fabrication, etc. to required length as in staging for water tank (upto 15m height staging) and connected works conforming to Fe 290,E-165 quality-A including welding or screwing with nuts, bolt and washers and inclusive of two coats of aluminium paint over a coat of red oxide zinc chrome primer complete all as specified and directed by Engr-in-charge..

M & L for preparation of new/old steel surfaces of any description, over 10cm width or girth and applying two coats of black bituminous (lead free) paint over a coat of red oxide primer (suitable for drinking water) to pressed steel overhead tank (internally) upto 15m height staging above ground level complete all as specified and as directed by Engr-in-Charge..

S & F wooden / scale conventional water level indicator complete with float, wire, float guide pipe, bracket & pulley, counter weight, indicator pin, etc complete all as specified and as directed by Engr-in-charge.

S & F for over flow control device suitable for upto 15m height Overhead tank with hooter system pvc pipe protections for sensor wire including testing complete all as specified and as directed by Engr in Charge.

Supply,install, testing and commissioning of Silent Diesel engine driven generating set 415 Volts 3 phase 4 wire engine as per BS 5514/ IS 10002 and alternator, DG Set as per IS : 13364 complete with relay panel for automatic starting on mains failure, control panel having meters, sound proof canopy and foundation etc for capacity 30 KVA as per ISO - 8528 conforming to the detailed specification as under:-

(a) Engine : The Diesel Engine shall be radiator water cooled, 1500 RPM , Cylinder 3 Nos. Starting stopping : Electrical start with 12 V DC 1 x 90 AH, 12 V Exide / Prestolite Low Maintenance Battery,Mechanical governer , The fuel tank provided shall be suitably mounted on the base frame fabricated out of 16 SWG MS sheets and capacity to run the genset for 8 to 12 hours continuously on full load. Fuel tank shall have Drain plug, Hand hole for cleaning, vent breather, fuel suction and return connections, fuel level indicator fuel filling neck with cap etc as per the standards. The engine and alteranator shall be directly coupled to ensure perfect alignment. The engine and alternator shall be mounted on a common base frame with AVM pads all as per manufracturer, Make - GREAVES.

(b) Alternator : Rating 24 KW / 30 KVA at 1500 RPM 415 V Phase to Phase and 240 Volt Phase to Neutral, 50 Hz 3 Phase 4 wire system alternato Screen protected / drip proof, self ventilating, self excited, self regulated, brushless, contineous duy protention IP 21 as per IS 13364 developing 30 KVA at 0.8 PF. It shall have provision for 10% overload for one hour on every 12 hours, The alternator shall confirm to IS : 13364/BS5000

(c) Controls/Protection : (i) Low LOP fault indication (ii) Indication for Water Temparature, (iii) High Colant Temparature fault Indication, (iv) Failure to start fault indication (v) Battery Volage monitoring, (vi) Low Battery Indication, (vii) Fuel level Indication, (viii) Engine RPM meter, (ix) Engine run hours meter, (x) Voltage for all three Phases, (xi) Amper meter for measuring current in all three phase. (xii) Frequency meter indication, (xiii) Protection for Over/Under Voltage (xiv) Protection for Over/Under Voltage (xv) Electronic tamper proof KWH meter 3 phase, 4 wire system with suitable ratio CTs. (xvi) Oveload protection (xvii)Suitable capacity of Battery charger shall be provided in the control panel to charge the batteries when mains supply in availbale.(xvii) Safeties against low Lube oil Pressure, high coolant Temperature, over load under & over voltage, under & over frequency Auto Shut Down, Visual & Audio Alarm against fault. When the Gen set is running the battery will be charged from the charging alternator.

(d) Acoustic enclosure : (i) Shall be maticulously designed CNC Turret punch press and hydraulic press brake manufractured body out of corrossion resistant cold rolled steel 16 SWG CRCA / MS sheet duly surface trated phosphated and finally powder coated constructed from folded sections to ensure regidness and aesthatic in looks. Canopy panel and doors shall have High density/ fire retradent / non igniting and noise reduction type Foam or Resin bonded Rock wool of suitable density properly covered with fibre cloth / tissue and perforated fixed to absorb noise. The average sound levell when measure in greenfiled (ISO 8525 Part 10) at 1 meter distance from all four sides is less than 75 dB (A) average as per CPCB Norms The average stablised hot air temperature rise with i the canopy near suction air filter to be maintained 7 degree centigrade over and above the ambient temperature Four higned doors shall be provided to canopy one door shall have glass window for control panel. The exhaust gasses shall be taken out through a suitable flexible pipe to prevent any back pressure on the engine. Provision shall be made on the canopy for connectig the output cable terminatiion should be provided. (ii) The exhaust system and noise suppressor shall be provided with thermal insulation, to prevent excess heat radiation on the Engine and safe for operator. (iii) Absorbtion type non residential silencer insulated from inside with glass wool shall be provided to suppress exhaust noise from the Engine. (iv) A suitably designed draught ventilation system is to be incorporated.

(e) DG power Control Panel : (i) Shall be outdoor type sheet steel type cubicle type control panel ,floor standing, dust and vermin proof under normal conditions complete with all internal wiring & will house the following:- (a) AC voltmeter (b) AC ammeter (c) vibrating reed Frequency meter (d) Indicating Lamps for SET ON & LOAD ON (e) MCCB for short circuit & Overload Protection (f) Aluminium Bus bars of adequate rating (g) Provision for bottom entry & Exit of power cabling (g)set of current transformer (h) set of control fuses.

Supply and fix on load change over switch 415 volts in sheet metal encloser 4 pole of capacity 160 Amps complate all as specified and as directed.

Supply, laying and testing cable XLPE insulated screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables heavy duty with stranded aluminium conductor, 1100 volts grade of size 3.5 core 70 Sqmm complete all as specified and as directed.

M & L for Earthing of machinery/eqpt with copper earth plate 60x60 cm x 3.15 mm thick electrode & 20x3 mm copper strip as earth lead bured directly ln ground, earth pit not less then 2.25 mtr deep from ground level and top edge of earth plate not less 1.5 mtr below normal ground level, and connected with nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No-3 connected to earthing test point complete all as specified and as directed by Engr in charge.

M/s M.L Consortium (BID ID -3124404)

M/s Nishi Kumar Das (BID ID -3134835)

SUNITA DEVI (BID ID -3134772)