SPL REPAIRSREPLACEMENT OF DG SET NO I OF CAPACITY 750KVA AND CONNECTED WORKS AGAINST BER AT MAIN POWER HOUSE UNDER AGE EM I AT GE MINNIE BAY PORT BLAIR

Amount

Supply, install, test and commissioning of 750 KVA/600 KW DG set diesel engine driven Generating set with alternator out put Voltage 415 Volts +/- 1% at set value of 415 V at a frequency 50HZ +/- 0.5%, prime/ continuous duty for unlimited hours of operation with STD control panel indoor type IP-43 consisting of AMF feature to be errected inside sub stn, (NTP for suitable for installing at Minniebay Port Blair, all mounted in acoustic enclosure and Control panel as per manufacturers design and specification confirming to latest norms of CPCB (CPCB-IV+ compliant) and as per E-in-C's Branch policy issued vide letter No A/37696/Gen/Pol/E2W (PPC) dated 29 June 2022 (copy enclosed) complete with the following including dismantling DG set and connected accessories depositing to MES storeyard. i) DG Fuel tank of minimum capacity 3000 Ltrs with fuel gauge etc complete fixed with suitable foundation frame, grouted on floor with connecting fuel pipelines from main fuel tank to DG fuel tank all as per OEM recommendations ,ii)Battery & Leads iii)Silencer-Hospital grade / heat exchanger type with pipe line & coil cooler / radiator as per OEM design & recommendations complete as per latest CPCB norms iv)AVM Pads as per OEM design v)First Fill of Lube vii)Acoustic Enclosure viii)Standard Control Panel( AMF) indoor type with connected switchgear/relays/meters complete IP-43 to be errected inside sub-stn. (ix) Suitable size cement concrete foundation platform of canopy base with height as required at site to mount the generator as per manufacturer's instructions/ recommendations. The cost of foundation bed incl earth work and dismantling existing CC and foundation etc is deemed to be included in the quoted rate. (x) Connecting cables, from existing panels and connecting cables , cables glands, cable lugs to new panel complete with all necessary accessories. (xi) Install on the foundation, provn & install connecting fuel pipe lines, cables etc. (xii) Test and commissioning complete including POL and resistive load bank required for testing.

(xiii) The cost of control cables from engine Control panel to AMF panel, transportation, installation, testing & commissioning etc shall be deemed to be included in the cost quoted.The rate quoted deemed to be inclusive of dismantling DG set & connected accessories and depositing to MES storeyard. (xiv) The details specifications appended below :- (I) ENGINE (a) General: Suitable four stroke compressed ignition, radiator water cooled,Turbocharged aspiration, continuous duty with 10% overload capacity for 1 hour in 12 hours continuous running, with 50°C intake air temperature, latest CPCB Euro emission engine ,turbocharged four stroke engine developing minimum 888 BHP @ 1500 RPM under NTP conditions, coupled to alternator mounted on Channel Iron base frame with external floor mounted fuel tank of minimum 3000 Ltrs capacity with fuel gauge and connected fuel pipeline from main fuel tank to DG fuel tank complete .The prime mover provided should be as per IS specifications. (b) Air intake system : Should comprise of dry type intake air filter mounted on engine, one in number vacuum indicator mounted on intake piping.. (c ) Exhaust System: Should comprise of one exhaust manifold, dry type, mounted on engine, one exhaust hospital type silencer which should be positioned in such a way that the exhaust gas is not sucked by the fan on the radiator/heat exchanger, thereby affecting the cooling system. The silencer should cater to the noise level tolerance prescribed in the relevant IS/BS. The silencer should be provided with flaps with a provision so that it will open only when the generator is running. The complete exhaust system shall be properly supported so that entire lot of the exhaust system shall not fall on the DG Set.

(d) Fuel System: Should comprise of disposal type element fuel filter, pressure type fuel pump mounted on engine, non return check valve in fuel supply and drain lines, wire braided hose between filter and pump, fuel system with suitable capacity electronic governor and engine mounted actuator. The fuel tank must have proper locking arrangement with level indicator and to be fixed seperately / externally. (e) Cooling System: Should comprise of heat exchanger type with coil cooler and connected pipeline complete, hospital type silencer and tested for 50°C ambient temperature with 7 PSI pressure cap mounted on base rail. The thermostat installed in the engine coolant outlet, fresh water pump mounted on engine, fan and fan hub mounted on engine. A reservoir of 50% of radiator capacity to replenish coolant by gravity (as and when required) is also to be provided.(f) Lubricating System: Should comprise of lubricating oil sump mounted on engine, gear driven lub oil pump mounted on engine, lubricating oil cooler-fresh water cooled integral with engine cool out circuit mounted on engine, oil filter lubricating with cap and lubricating oil dip stick for oil level check mounted on engine. The system should be capable of feeding lube oil to the main end & large end bearings, cam shaft, valve rocker gear and all moving parts. (g) Starting System: Should comprise of suitable voltage DC electrical starter mounted on engine, with suitable maintenance free Lead Acid battery of capacity 12 V DC - 02 Nos with suitable AH to be mounted in trays (having rubber insulation) on the main frame. It should have the provision to charge the battery from external sources during static condition and while running of the generator. (h) AC Generator : The generator shall be horizontal and foot mounted,750 KVA, 415 Volts, 3 phase, 4 wire, 0.8 PF, 50 HZ, self excited, self regulated, brushless AC generator, suitable for voltage regulation + 1% , an ambient temperature of 50° C with IP-23 enclosure class H insulation and temperature rise limited to class H as per following technical details:- (i) Type, Brush less AC Generators with PMG and space heater as per OEM design (ii) Output rating 750 KVA (iii) Output Voltage: 415 ± 1% under all loading conditions and with maximum voltage Dip at full load 0.8 PF shall be < 19% as per OEM design.

(iv) Output frequency 50Hz ±0.5% up to 0.8 lagging. (v) No of Phases: 3 phase with 01 Neutral (4 wire) (vi) Mounting : Horizontal foot mounted. (vii) Enclosure : Minimum IP-23 / Drip proof and screen protected. (viii) Electronic Automatic voltage regulator with response time < 75 m sec and + range of voltage adjustment. (ix) Class of insulation-'H' (x) Short circuit withstand 3 times rated current for 3 secs and overload withstand capacity for continuous duty with 10% overload capacity for 1 hour in 12 hours continuous running, & 150% overload for 30 sec running (xi) Overspeed capacity 1800 RPM for 2 min. (xii) The maximum unbalanced load across phases shall be less than or equal to 25%. NOTE : Following shall be deemed to be included in cost quoted :-(i) Standard Control panel with AMF feature indoor type with IP-43 for 750 KVA DG set as per OEM design to be errected inside sub-station. (ii) Suitable size cement concrete foundation platform of canopy base with height as required at site to mount the generator as per manufacturer's instructions/ recommendations. The cost of foundation bed incl earth work and dismantling existing CC and foundation etc is deemed to be included in the quoted rate. (iii) Connecting cables, from existing panels and connecting cables , cables glands, cable lugs to new panel complete with all necessary accessories. (iv) Install on the foundation, connecting fuel lines, cable etc. (v) Test and commissioning complete. (vi) The cost of control cables from engine Control panel to AMF panel, transportation, installation, testing & commissioning etc shall be deemed to be included in the cost quoted.

(r) Trials:-Trials on site should be given as per load tests prescribed and all functional trials should be shown. Note : (i) The Engine, alternator, Control Panel, Acoustic enclosure shall be integrated unit sourced and AMF panel,to be installed inside sub-stn shall be from OEM only as per Make given in Sch 'A' (ii) Testing of DG set shall carried by representative nominated by HQ CE (A&N) Zone through Accepting Officer. The cost of POL & resistive load bank required for testing the DG Set is deemed to be included in quoted rates. The DG Set shall run for a period of 12 Hours continuosly out of which 15 minutes on No Load , 2 Hrs 15 minutes of 25% rated load, 2 hrs on 50% rated load , 2 Hrs 30 minutes on 75 % rated load, 4 Hrs on rated full load, 1 Hrs on 110% rated full load.(iii) First filling of coolant, Engine Oil, lubricants and fuel etc should be arranged by contractor for complete testing and quoted rate deemed to be inclusive for the same.(iv) The Contractor shall submit technical specifications and General Arrangement drawings of OEM for approval before placing order. (v)The Contractor shall make all necessary arrangements for pre-despatch inspection at manufacturer site or digital e-testing as directed by Accepting Officer to be arranged and for pre-commissioning test by rep nominated by HQ CE (A&N) Zone after installation of DG set & Panel. The cost for the same is deemed to be included in quoted rate. (vi) The quoted rate inclusive earth work for foundation, Cement concrete foundation as per OEM design, necessary T&P for transportation and installation complete.(vii) The quoted rate inclusive of supply of next nearest higher capacity as per OEM design without any extra cost.(viii) The quoted rate inclusive of earth work for foundation, Cement concrete foundation as per OEM design, dismanlting of brickwall/pcc/tiles and making good the disturbed surfaces including repairs/replacement brickwall/tiles/pcc & provision of steel wire mesh/GI duct for providing proper exhaust/breathing system to DG set, necessary T&P for transportation and installation complete.Any damages to fuel line system including diversion of fuel line system from Main fuel tank/fuel pumping system to all existing and proposed DG fuel tanks as required at site shall be deemed to included in quoted rate.The contractor shall visit site before quoting the tender for ascertaining the complete work required. Any excess earth strip from earth test point to DG set shall be provided at no extra cost and quoted rate deemed to be inclusive for the same.

Taking down old unserviceable LT XLPE/PVC insulated 3.5/4 core cable of size 300 to 500 Sqmm including DWC pipe/ cable cover complete all as specified and directed by Engineer-in-Charge.

Supply , lay, connect, test and commission cable LT 1100 volts heavy duty XLPE insulated armoured aluminium conductors, in trenches/ducts on angle iron supports including glanding, crimping and connecting up of size 3.5 Core x 400 sqmmcomplete all as specified and directed by Engineer-in-Charge. Note: Cable to be laid in existing cable ducts with proper angle iron supports/clamps wherever required with LT end kit heat shrinkable joints complete.

Material and labour earthing with steel earth plate electrode of size 600x600x6mm thick buried directly in ground to a depth not less than 2.25 mtr deep below normal ground level with top edge of the earth plate not less than 1.5 mtr deep below normal ground level connected to galvanized iron strip of size 32x6mm as earthing lead by means of nuts, bolts and washers of steel after welding of GI strip to earth electrode to the full length of earth plate, GI medium grade pipe 20 mm bore protection pipe upto test point, 40mm dia GI light grade watering pipe with funnel and wire mesh, RCC pit cover of size 300x300x40mm reinforced with XPM having weight not less than 4Kg/sqmm including 6mm thick MS bar handle made to shape, PCC pit with 1:3:6 type C1 with angle iron frame made of angle iron of size 40x40x4mm, adequate qty of charcoal dust and salt layers all around the earth plate, excavation , earth work in any type of soil, removal of excavated soil and returning filling in all as required at site complete all as specified in electrical plate No 3 of SSR Part-I and all as specified or indicated including testing on completion. NOTE :-Rates inclusive of necessary excavation in any type of soil, earth work, PCC pit, RCC cover, funnel with watering pipe, GI earth strip upto 7.5 m long for connecting to test point etc. all as required at site for complete earthing and dismantling old defective earthpit.

Material and labour earthing with copper plate 60×60cm ×3.15mm thick electrode and 20×3mm copper strip as earthing lead, buried directly in ground to a depth not less than 2.25m deep below normal ground level with top edge of the earth plate not less than 1.5m deep below normal ground level connected to20×3mm copper strip as earthing lead by means of nuts, bolts and washers of steel after welding of GI strip to earth electrode to the full length of earth plate, GI medium grade pipe 40 mm bore protection pipe upto test point, 20mm dia GI light grade watering pipe with funnel and wire mesh, RCC pit cover of size 300x300x40mm reinforced with XPM having weight not less than 4Kg/sqmm including 6mm thick MS bar handle made to shape, PCC pit with 1:3:6 type C1 with angle iron frame made of angle iron of size 40x40x4mm, adequate qty of charcoal dust and salt layers all around the earth plate, excavation , earth work in any type of soil, removal of excavated soil and returning filling in all as required at site complete all as specified in plate No 3 of SSR Part-I and all as specified or indicated including testing on completion. Note :-Rates inclusive of necessary excavation in any type of soil, earth work, PCC pit, RCC cover, funnel with watering pipe,Copper earth strip upto 7.5 m long for connecting to test point etc. all as required at site for complete earthing and dismantling old defective earthpit.(for DG neutral)

Supply, install, testing and commissioning of Sandwich type (Copper + tin plated throughout length), aluminium busway (3L+N+PE), with multi layer polyester film class-F insulation, 100% N, minimum 80kA for 1 sec and 12KV impulse withstand, enclosure as Integral Earth in GI, with IP-55, bus duct shall be made out of min 1.5 mm thick galvanised sheet steel enclosure (C-Ribbed housing in min 1.5 mm thick) with IP-55 and powder coated painted with RAL 7035 or as per OEM design , minimum Temp rise: 55 deg. over ambient of 40 deg, rated insulation & operating voltage1000V of minimum rating 1600 Amps with IP 55 protection straight run with or without outlets complete all as specified and directed by Engineer-in-Charge. Note : The rate inclusive of Edgewise Hanger (suspension brackets) and angle iron supports wherever required as per OEM design for supporting busduct. Contractor shall submit GA drawing/specification for approval of GE before placing order.

Supply only the 90 Degree ( Elbow) special for Srl item no 5 here-in-before complete all as specified and directed by Engineer-in-Charge.

Supply only the Flange End special for Srl item no 5 here-in-before complete all as specified and directed by Engineer-in-Charge.

Supply only the Copper flexible (Braided) special for Srl item no 5 here-in-before complete all as specified and directed by Engineer-in-Charge.

Supply only the Adapter Boxes/Bellows for DG/transformer/LT panel for Srl item no 5 here-in-before complete all as specified and directed by Engineer-in-Charge.

Supply & fix copper strip 20mm x 3 mm buried in ground / fixed inside duct including dismantling unserviceable strip complete all as specified and directed by Engineer-in-Charge.

M&L as in repair for rolled mild steel work as in bands, straps, supports or stays including bolts, if required, hooks (stay) complete of grade FE-290, E-165 complete all as specified and directed by Engineer-in-Charge.

Supply , assembly and erection of GI sheet with TDF flange rectangular/square duct made out of 'L' shaped hollow profile, duly factory boxed, incl all accessories such as Corner, Cleat, Carriage bolt, Gasket and appropriate sealant on longitudinal joints etc complete of size 24 Gauge of any heights including cutting & opening of brick wall and making good the distrubed surfaces including dismantling of old unserviceable GI sheet complete all as specified and directed by Engineer-in-Charge. Note : The Specials and angle iron supports required will be measured and paid separately under relevant Sch items

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