PROVISION OF 625 KVA DG SET FOR OTM RHQ(NE) AND OTHER CG UNIT AT 05 ACRES LAND AT RAJARHAT KOLKATA UNDER GE(I)(CGN) KOLKATA

Supply, erecting, testing and commissioning of silent (Sound proof enclosure) type Diesel Engine Driven Generating Set capable of delivering 625 KVA, (500 KW at 0.8 Power Factor) Water&coolant cooled, 415 Volts (AC three phase, 4 wire system of supply) 50 HZ 1500 RPM complete with Automatic on Mains Failure (AMF) control panel complete as per latest CPCB Norms. The DG set shall consists of diesel engine coupled to a matching alternator, through flexible coupling and mounted on common base frame and complete with control panel suitable for climatic conditions prevelanet at Kolkata with suitable derating factors as applicable and meeting specifications as elaborated here-in-after.

(i) ENGINE (Prime Mover) : Diesel Engine 1500 RPM, direct injection, multi cylinders, four stroke, confirming to ISO3046/BS 5514, water and coolant cooled, naturally turbo charged, capable of giving adequate power to drive alternator capable of delivering 625 KVA at outdor atmospheric conditions at Kolkata, (Taking all derating factor into consideration), 24 Volt battery electric start complete with fly wheel all standard fittings / fixtures as per manufacturer and including suitable panel with techometer, lub oil temperature, pressure gauge and frequency meters and also including self starter system with electronic governor and Engine protection system (Shut down, High water temperature, low lub oil, oil pressure, over speed etc.) fuel tank and first fill of lub oil and other consumables etc and self starting system incl batteries etc complete. (ii) ALTERNATOR : Brushless AC alternator, 3 phase, 415 Volt, 4 wire, rated for output of 625 KVA,(500 KW at 0.8 Power Factor) 1500 RPM, IP 23 Protection class enclosure, insulation class "H", saliet pole, revolving field, single bearing automatic voltage regulator coupled through flexible coupling with and to match the above engine.

(iii) BASE PLATE : Made out of structural steel as per manufacturers recommended design/specifications. (iv) ACOUSTIC ENCLOSURE : Sheet metal fabricated cope type silent enclosure manufactured on CNC machines as per Latest CPCB norms and powder coated after seven tank process, the enclosure shall be designed for reducing the sound level to 75 dB (A) at a distance of 1 M at 75% load under field condition 70 dB at 3 M from Gen set when DG set is working at full load along with testing conformance, lebeling certification etc as laid down in GSM No 371 (E) dt 17 May 2002 and amendements thereof. (v) Foundation/Plinth/Base : Shall be providedf 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 0.5M (vi) MISC : Tool kit, operation and maintenance catalogue, spare part list, overhaulling manuals, guarantee card etc shall be provided as per manufacturer standard parctices. (viii) Fully automatic AC operated additional battery charger of suitable capacity incl suitable size twin core copper wires fixed with copper lugs shall be provided from charger to batteries for charging of batteries without extra cost. Make of the complete DG set: - Kirloskar (KOEL GREEN) Model No- KG1-600WS, or equivalant model of Jakson-Cummins/Sudhir-Cummins/Greaves Power/Mahindra Powerol.

SPECIFICATIONS : (i) Voltage : 415 Volts, 3 Phase, 4 Wire (ii) Voltage : 415 Volts, 3 Phase, 4 Wire (iii) Power Factor : Not less than 0.8 Lagging (iv) Governing Class (as per ISO 8528 Part-V) : G3 (v)Noise Level : Less than 75 dBA (vi) Fuel Consumption : Not more than 135 liters per hour at 100% load, 100 Liters per hour at 75% load and 68 Liters per hour at 50% load. (vii) Fuel Tank Capacity : Not less than 990 Liters (viii) Height including silenser : Not exceeding 3500 mm. ENGINE (ix) Engine Rated output (Prime contineous as per ISO 8528-1) : Not less than 723 HO/532 KW (x) No of cylinders : 12 (xi) cubic capacity : Not less than 23.88 liters (xii) Bore X Stroke : 130 X 150 mm (xiii) Raterd speed : 1500 RPM (xiv) Aspiration : TA (xv) Lube oil change period : 500 Hours (xvi) Lube oil sump capacity : 50 liters (xvii) Coolant capacity : 135 Liters

ALTERNATOR (xviii) Insulation Class : Class H (xix) Ingress Protection : IP23 (xx) Alternator Efficiency : Not less than 95.5% at 100 % load and 95.8% at 75% load (0.8pf). (xxi) Permissible Voltage dip at full load 0.8pf lag < = 19% (xxii) Time permitted to build rated voltage at Rated RPM : < 5 Sec (xxiii) Short Circuit Ratio : 0.37 (xxiv) Short circuit withstand time : < 3 Sec (xxv) Overload withstand capacity : 10 % overload for one hour in 12 hour duration (xxvi) Canopy insulation shall confirm to UL-94 HF1 Class for flammability (xxvii) Controller shall be microprocessor based fully configured with garphical LCD display, monitoring features for all electrical parameters, lub oil parameters, Battery parameters and self diagnostics faeatures for all important parameters.

Materials and labour for earthing complete with galvanised iron earth plate electrode 600 mm x 600 mm x 6 mm thick, burried directly and preferably vertically in ground, earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 m below ground level connetced with galvanised strip of 32x6 mm by means of nuts, bolts, check nuts and washers made of galvanised iron or steel earthing lead to be protected by galvanised iron pipe of 50mm bore (light grade) 5m Long and other end connected to earthing test point or lightening arrestor or main controlling switch as directed including providing funnel with 20mm bore galvanised iron pipe (medium grade), wire mesh, charcoal or coke and common salt in alternate layer of 15cm (compacted thickness) all round the earth electrode, concrete earth pit in PCC (1:3:6) type C-1 (with 20mm graded aggregate), 50mm thick precast RCC (1:2:4) cover slab (re-inforced with 8mm dia TMT bar @ 15 cm C/C bothways and suitable handle made of 10mm dia) including necessary earth work in excavation, returning filling and removal of surplus earth upto a distance not exceeding 50 m etc all as shown on electrical plate No. 3 of MES Schedule Part-I(2020) complete including testing on completion all as specified and as directed.

M&L for Earth continuity conductor or mainearthing lead fixed to wall on battenor recess or chases or buried inground or drawn in conduit/pipe orfixed to poles or any other indicatedsituation for loop earthing etc. as required 32 x6mm dia galvanised iron orsteel wire complete all as specified and as directed.