Provn of standby power supply with DG Set to IT at 19 Wing AF Stn under GE (AF) Borjhar

Amount

Supply and laying heavy duty armoured LT underground cable of 1100 volt grade, XLPE insulated, PVC sheathed multi stranded aluminium cable of size 120 Sq.mm, 3.5 core in pipe/trenches/ cable duct/fixed on wall by proper size of shaped GI clamps with nuts, bolts, etc. and making good the disturbed surfaces by cement mortor/painting to match the existing, connecting with all accessories lugs and glands complete all as specified and as diected.

All as per Serial item No. 1 here-in-before but cable size 95 sq.mm 3.5 core.

All as per Serial item No. 1 here-in-before but cable size 70 sq.mm 3.5 core.

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

M&L for returning, filling in, including spreading, levelling, watering and well ramming in layers not exc. 25cm in soft/loose soil complete all as specified and as directed.

M&L for removing surplus soil to a distance not exc. 50m and depositing where directed at a level not exc. 1.5m above the starting point complete all as specified and as directed.

M&L for sand cushioning for under ground cable with locally available sand for protection of cable including spreading and consolidations complete all as specified and as directed.

Supply and laying in trenches dry and well burnt locally available sub class “B” bricks over sand cushioning for protection of cable complete all as specified and as directed.

M&L for GI pipes of size 80mm bore, light grade with all fittings, laid in trenches/wall/pole through and including MS flat iron (25x3mm) clamps with nuts, bolts, & washers (where ever required) of proper sizes for protection cabls complete all as specified and as directed.

M&L for boring under roads without disturbing the top surface of the road for throughing the cable complete all as specified and as directed.

Supply, installation, testing and commsissioning of silent Diesel Engine driven generating set 415 volt, 3 Phase 4 wire, confirms to IS/IEC 60034-1 IS146 IS 13018 ISO 8528&ISO348 complete with foundations sound proof canapy with noise level<75dba @ 1 mtr at 75% under free field conditions of capacity 62.5 KVA at 0.8 Power factor. The specifications of Diesel Engine. Aternator & control panels complete all as specified and as directed as appended below:- Note:- Necessary drawings as per manufactures recommendations shall be approved by GE before commencement of the job.

Engine Specification:- Engine rated BHP 84 at 1500 RPM 4 cylinders in line aspiration Turbocharged, cooling liquid cooled Alternator Specification:- Self excited and self regulated and supplied with electronic Voltage Mechanical features, steel body & CI End shields, Life lubricated sealed ball bearings at the both ends. Screen protected IP 23 self ventilated electrical features single phase/three phase 240/415V. 50 Hz . Insulation class 'H' steady voltage regulations 1% current compounded self exciation system. (brusghless type lower hormonic content of less than 3% at no load, power factor 0.8 lagging. Phase sequence is U.V.W when rotated clockwise viewing from DE side 20% over sopeed (1800 rpm for 50 Hz) over load 110% of rated value for one hour.

AMF Panel Specification:- CPRI approved LT cubicle panel box outdoor type (IP-65) made of 3.15 mm thick CRCa sheet supported on structural channel type MC-75 fixed on the ground of foundation in PCC (1:2:4) type B-1 (using 20mm graded stone aggregate) and net cementing the same. The cubicle panel box should have enameled danger notice plate of 1 mm thick duly painted with two coats of powder coated paint internally and externaly on the surface as directed. The panel box should be cubicle shaped with special type of hinges and totally enclosed dust proof and vermin proof front and back opening with locking arrangements including provision to accomdate battery separately and with the following electrical items.

(j) Aluminium bus bar 4 strips coverd with PVC insulated sleeves. 400 Amps capacity including connections complete -01 set (k) MCCB 125 Amp (Adjustable type) 415 Volts (vertically placed) 4 pole 25 KA breaking capacity under voltage relay MCCB - 02 Nos (l) 125 Amp 4 pole Power contactor, 230 volt AC (AC 1 Duty) Add on block for power circuit connections by suitable of cable with proper sizes of lugs on existing panel.

Acoustic Enclosures:- (a) Weather proof sound proof Enclosurer of minimum 3 mm thick to meets latest CPCB/MOEF norms. Emission tests (g/Kw-hr) (i) Nox+HC (ii) CO<3.5 (iii) PM,0.3 (iv) Smoke limit (light absorption co-efficient, m-1<0.7 (b) Acoustic insulation materialsd (PU foam) confirms to IS8133 inner surface must be covered with perforated sheet.

Other accessories:- (a) 12 V maintenance free abttery with battery lead-02 Nos (b) Fuel tank with fuel indication and measuring guage made up of not less than 2 mm thick sheet (c) Modbus communication synchoronization system.

Supply, installation, testing and commissioning of servo controlled voltage stablizer outdoor type confirming to IS 9815:1994, copper wound naturally oil cooled , 3 phase 415 V 2.5% AC, 50 Hz of capacity 125 KVA for unbalanced load with input voltage avriation from 300V-480 V between phase to phase with alarm/protection and by pass facility input voltage & current etc. and comprised of digital multi function meter complete including platform as per manufacturer's norms and first filling of transformer oil complete all as specified and as diorected with the undermentioned features as mentioned below:- (a) Micro controller tech based control module (b) Correction speed minium 13 V per second and response time 20 milli second (c) High and low voltage cut off system (d) Overload and short circuit protection (e) High and low voltage cutoff (f) Earth leakage protection system (g) By pass switch shall have 3 positions as below:- Position No 1: Stablised supply to load Position No 2 : No supply (both load and stablizer are disconnected from mains. Position No 3 : Stablizer is by passed and isolated and load is directly feed from mains

Notes:- (i) The manufacturer shall state the no load and full load losses corresponding to minimum rated input voltages. The tolerances on these declared values shall be provided in Table 7 of IS 2026 (part-I):1977. The no-load current shall not be more than 5% of the rated output current, Please ref BIS clause 9.4 & 9.5. (ii) The efficiency of servo voltage stablizer shall be not less than 95% as per clauses 9.6 of BIS. (iii) The following testing of servo voltage stablizer should be carried out in manufacturer work shop in presence of Rep of Accepting Officer. (a) Physical examination (b) Insulation resistance (c) High voltage test (d) Leakage current test (e) Provision for earthing (f) Output voltage (g) No load current (h) Mesurement of no load losses (j) Inducted voltage test.

Supply, installation, testing and commissioning of servo controlled voltage stablizer oudoor type confirming to IS 9815:1994, copper wound naturally oil cooled , 3 phase 415 V 2.5% AC, 50 Hz of capacity 60 KVA for unbalanced load with input voltage avriation from 300V-480 V between phase to phase with alarm/protection and by pass facility input voltage & current etc. and comprised of digital multi function meter complete including platform as per manufacturer's norms and first filling of transformer oil complete all as specified and as directed with the undermentioned features as mentioned below:- (a) Micro controller tech based control module (b) Correction speed minium 13 V per second and response time 20 milli second (c) High and low voltage cut off system (d) Overload and short circuit protection (e) High and low voltage cutoff (f) Earth leakage protection system (g) By pass switch shall have 3 positions as below:- Position No 1 : Stablised supply to load Position No 2 : No supply (both load and stablizer are disconnected from mains. Position No 3 : Stablizer is by passed and isolated and load is directly feed from mains

Notes:- (i) The manufacturer shall state the no load and full load losses corresponding to minimum rated input voltages. The tolerances on these declared values shall be provided in 7 of IS 2026 (part-I):1977. The no-load current shall not be more than 5% of the rated output current, Please ref BIS clause 9.4 & 9.5. (ii) The efficiency of servo voltage stablizer shall be not less than 95% as per clauses 9.6 of BIS. (iii) The following testing of servo voltage stablizer should be carried out in manufacturer work shop in presence of Rep of Accepting Officer. (a) Physical examination (b) Insulation resistance (c) High voltage test (d) Leakage current test (e) Provision for earthing (f) Output voltage (g) No load current (h) Mesurement of no load losses (j) Inducted voltage test.

M&L earth contunity conductor or main earthing lead fixed to wall/roof by bridge insulators (as required basis) on any other indicated location for loop earthing, etc. with 20x3mm copper strip complete all as specified and as directed. Note : Copper strips should be fixed on bridge insulator of 60cm apart if required and no extra cost shall be admissible for the same.

M&L for earthing complete with copper plate electrode 600x600x3.15 mm thick, burried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of the plate not less 1.5m deep below normal ground level connected to coopper strip 20x3mm dia by means of brass nut, bolts, check nut , bolt, washers, etc. and protection pipe for earth wire from the earthing plate to the DB/main switch/panel,(GI pipe of size 40mm bore, light grade) watering pipe from plate to earthing pit (GI pipe of size 20mm bore, medium grade) funnel wire mesh. The earthing pit made up of PCC (1:3:6) type C-I (using 20mm graded stone aggregate) and pit cover made up of 40 mm thik pre-cast RCC (1:2:4) type B-I (using 20mm graded stone aggregate) reinforced with 6mm dia TMT bar and suitable handle with 8mm dia TMTbar including necessary excavation and earth work complete as shown in SSR Part-I Plate No.5 all as specified and as directed.

Notes;- ( i) The copper strip and protection pipe beyond 7.5m length shall be measured and paid separately. However earthwork for the same is deemed to be included in the quoted rate . (ii) The desired value of earth resistance is less than 5 Ohm on testing after completion if the desired earth rsistance is not obtained the earthing will be redone at no extra cost, otherwise it will not be measued and paid to the contractor. (iii) Form work of size .9mx.9mx.6m for pouring charcoal and salt is deemed to be included in the quoted rate. (v) During earth work if surface water found at site, the cost for dewatering through pumpset is deemed to be included in the quoted rate.

M/S PRASANTA MAHANTA