PROCUREMENT OF DG SET FOR OTM ACCN AT CSD DEPOT NARANGI UNDER GE GUWAHATI

Amount

Supply, install, testing and commissioning of Silent Diesel Engine Driven Generating Set 415 Volts 3 phase 4 wire 50 Hz AC with sound proof outdoor type acoustic enclosure of capacity 125 KVA at 0.8 power factor. The DG Set shall consists of diesel engine as per BS 5514/ IS 10002 coupled to a matching alternator as per IS : 13364/BS5000, through proper coupling and mounted on common base frame and complete with control and relay panel for automatic starting on mains failure, including base mounted fuel tank with mounting arrangements and inlet, outlet return oil arrangement, exhaust pipe complete (capacity of engine/ alternator suitable after considering all derating factors prevalent at Guwahati and capable to run at 10% overload for continuous 01 hour at an interval of every 12 hours) including PCC foundation of suitable size leaving at least 0.5 M all around, anti-vibration pads, including all features to comply with latest CPCB guidelines and comprising of followings:-

(a) Engine (Prime Mover): Diesel Engine 1500 RPM , direct injection, 6 cylinders, four stroke, confirming to ISO3046/BS 5514, water cooled, naturally turbo charged, capable of giving adequate BHP to drive Alternator capable of delivering 125 KVA at 0.8 PF, electric self start with 12/24 Volt battery (as per manufacturer recommendation), complete with fly wheel and all standard fittings/ fixtures including tachometer, dynamo with electronic governer and Engine protection system (Shut down at high water temperature, low lub oil, low oil pressure, over speed etc), fuel tank and first fill of lub oil and other consumables etc. The fuel tank shall be suitably mounted on the base frame fabricated out of 16 SWG MS sheets and capacity to run the genset for 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 .

(b)Alternator: AC alternator, 3 Phase, 415 Volt, 4 wire, rated for output of 125 KVA at power factor 0.8, 1500 RPM, IP 23 Protection class enclosure, insulation Class "H", salient pole, revolving field, automatic voltage regulator, brushless, self ventilating, self excited and suitable to match the above engine.

(c) BASE PLATE: The base plate made out of structural steel as per manufacturers recommended design/specifications.

(d)AMF CONTROL PANEL: Inbuilt AMF Panel as per manufacturers design incl reqd capacity and Nos of relays, MCCBs for 02 Nos incoming supply and 01 No MCCB for outgoing supply, Suitable contactor at both incoming and one outgoing supply, circuitprotection required for automatic operation of DG Set subject to approval of drawing from Engr-in-Charge/GE.

Controls/Protection/ Indication : The display unit shall be capable to display : -(i) Low LOP fault indication (ii) Indication for Water Temperature, (iii) High Coolant Temparature fault Indication, (iv) Failure to start fault indication (v) Battery Volage monitoring, (vi) Low Battery Indication, (vii) Fuel level Indication, (viii) Engine RPM indication, (ix) Engine run hours indication, (x) Voltage for all three Phases, (xi) Ampere indication for measuring current in between all three phases and between phase and neutral. (xii) Frequency indication, (xiii) Protection for Over/Under Voltage (xiv) Protection for Over/Under current (xv) Electronic tamper proof KWH meter 3 phase, 4 wire system with suitable ratio CTs.(xvi) Indicating Lamps for SET ON & LOAD ON

The protective features shall have: -(i) Oveload protection (ii)Suitable capacity of Battery charger shall be provided in the control panel to charge the batteries when mains supply in availbale.(iii) 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. Provision of cable gland for entry of cables. When the Gen set is running the battery will be charged from the charging alternator.

(e) 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 treated phosphated and finally powder coated constructed from folded sections to ensure rigidness and aesthatic in looks. Canopy panel and doors shall have High density/ fire retardent / 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 level 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 stabilised hot air temperature rise within 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 gases 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 (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) Absorption type non residential silencer insulated from with glass wool shall be provided to suppress exhaust noise from the Engine. (iv) A suitably designed draught ventilation system is to be incorporated.

(f) Foundation/Plinth/Base: Shall be provided as per manufacturers recommendations, however minimum 0.5 m Space should be available all around the Set and height of plinth shall not be less than 0.5 M

(g) MISC: Tool kit, Operation and Maintenance catalogue, spare part list, overhauling manuals, guarantee card etc shall be provided as per manufacturer standard practices. Note :- (i)The rate quoted is deemed to include the rate of making plinth as per manufacturers instruction to install the DG set with AMF Panel and the height of the plinth (1:2:4) shall not be less than be 0.50 mtr from existing ground level or as directed by Engr-in-Charge. (ii) All standard accessories not specified above but forming part of standard model of OEM and complying with latest CPCB norms and relevant to related IS with latest amendment deemed to be included in the quoted rate

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth for laying of cable , etc and getting out in soft/loose soil complete all as specified and directed.

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

Removing excavated material n exc. 50m and depositing where directed at a level n exc. 1.5 m above the starting point complete all as specified and directed.

Supply and spread clean dry river sand in cable trenches as in cable cushioning 80mm below cable and 150mm above the cable, punned down to a compacted thickness of 180mm which shall be measured and paid complete all as specified and as directed.

M & L for laying of Bricks in trenches as cable protection ; common burnt clay building bricks, sub-class ‘B’ designation 75 complete all as specified and directed.

M & L for Tubes, 'light grade', galvanised of 150 mm dia with all fittings to be laid in trenches or in floors as cable protection complete all as specified and directed.

Supply, laying and testing cable XLPE Insulated ,screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 150 sqmm 3.5 core complete all as specified and directed.

Supply and fix ON LOAD change over switch 415V in sheet metal enclosures 4 pole of capacity 200 Amps complete all as specified and directed.

M & L for earthing complete with GI earth plate electrode 60cm x 60cmx 6mm thick buried directly in ground (earth pit not less than 2.25 metre deep below ground level) with the top edge of the earth plate not less than 1.5 metre below normal ground level connected to GI earth strip 32 x6 mm by means of brass bolts ,nuts, check nuts and washers of galvanized iron steel all as shown in electrical plate No.3 of MES Schedule parts-I 2009 and including excavation & earth work in any type of soil, disposal of soil, providing charcoal dust and common salt upto top edge of earth plate, construction of PCC pit in cement concrete 1:3:6 type C-1 with 40 mm thick RCC 1:2:4 type B-1 as in cover slab, reinforced with 8 mm dia TMT bars @ 100mm c/c both ways with lift hook made out of 6mm dia bar, watering arrangement with funnel and wire mesh and watering pipe of 20mm dia GI light grade and 40 mm dia light grade pipe for earth lead protection upto 7.50m length (beyond 7.5 m length will be measured and paid separately) and testing on completion, complete all as specified and directed.

Electromech Engineers

M/s JK Jangid and Company