PROVN OF STAND BY POWER SUPPLY FOR PERIMETER SECURITY LIGHT AT ALG MECHUKA AND TUTING AND CERTAIN E/M ITEMS AT AFS UNDER GE (AF) JORHAT

Amount

Supply, install, testing and commissioning of silent type Diesel Engine Generating Set, 415 volts, 40 KVA, 3 phase 0.8 power factor, 50 Hz, 1500 RPM self excited self regulated brushless AC generator installed including acoustic enclosure (outdoor type) suitable for ambient conditions at ALGs and confirming to conditions under ISO 3046 with capacity of 10% overloading for one hour in every twelve hour duration and alternator complete all as specified and as directed with the followings : Alternator :- Standard designed alternator rated at 40 KVA at 0.8 (lag) power factor AC, 3 phase, 4 wire, 415 volts, 50 Hz, 1500 RPM, self excited self regulated with an AVR, screen protected drip proof brushless design with winding in pole faces, insulating class ‘H’ with IP-23 protections and voltage regulations of +1% at rated voltage from no load to full load. The alternator shall be in position to generate supply with frequency regulation with in +1% tolerance. The alternator will be suitable for tropical climate and shall generally confirm to BS- 2613/5000/ Is – 4722. Diesel Engine:- Adequate capacity of Diesel Engine water cooled to drive independently above alternator and after considering de-rating as per site conditions after generating and reducing power consumed by accessories directly coupled through flexible coupling multi cylinder multi stroke direct injection, cold starting 1500 RPM, as per relevant IS/BS complete with standard accessories all as specified and required for safe handling and operation salient features of accessories shall be as under:-

(i) Fly wheel with housing (ii) Cooling system:- Molded radiator with fan & belts (iii) Cooling Water pump :- Centrifugal type belt driven (iv) Exhaust System :- Exhaust System complete with exhaust piping of suitable dia with MS pipe, medium grade Turbo charger type Exhaust manifold Silencer : Residential type (v) Fuel System :- Fuel injection system with fuel injectors, fuel injection solenoid switch controlled by governer electric operated (as recommended by OEM) for 1% speed /frequency regulation (vi) Lub oil System (vii) Governer mechanical/ electronic type Starting System :- Electric self starter with and including battery charging alternator 12 volts DC. Batteries :- Batteries of capacity 12 V, 100 AH-01 No complete with copper conductor multistranded leads of suitable length from self starter to the battery terminals complete with initial charge and initial fill of electrolyte all as specified Control Panel: Control panel shall be fabricated from 16/14 SWG sheet and powder coated after seven tank treatment process:

(a) Microprocessor based generator set monitoring and control system consists of LCD display and to monitor operator interface, fault history, alternator data, Engine data, provision for service adjustment and calibration of DG control functions, engine controls, engine protective functions, alternative protective functions, etc. (b). Instrument fuses and control wiring. (c). Indication lamps for set running and load on. (d). Bus bar including suitable capacity of MCCB/MCB, including CTs, cable, etc. AMF Panel :- Automatic Mains Failure (AMF) Panel made of CRCA sheet 3.15mm thick including necessary arrangement to Install, Testing & Commissioning & connecting to load cable upto changeover switch, suitable capacity of 4 pole MCCB complete all as per OEM recommendation. Acoustic Enclosure:- Manufactured by OEM suitable for 40 KVA DG Set Civil Works :- All civil works including PCC plat form and related foundations including for panel and equipments including making good of disturbed area during installation and commissioning of genset. The depth and size of the foundation and PCC as recommended by the manufacturer.

M&L for earthing complete with GI earth plate electrode of size 600x600x6mm thick buried directly in ground with earth pit not less than 2.25m deep below ground level with top edge of plate not less than 1.5m below normal ground level connected to GI earth strip of size 32x6mm earth lead by means of nuts, bolts, check nuts, washers of galvanized iron as steel, protected by galvanized iron pipe 40mm bore (medium grade) including cement concrete (1:3:6) type C-1 (using 20mm graded stone aggregate) earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 45x45x5cm thick reinforced with 8mm dia TMT bars @ 15cm c/c both ways with 10mm dia mild steel round bar of 30cm long, bent to shape as lifting handle, funnel, wire mesh, 20mm bore galvanized iron pipe (medium grade) for watering, charcoal or coke and salt in alternate layers including necessary excavation & earth work in soft/loose soil complete all as shown in Electrical Plate No. 3 of SSR Part-I including testing on completion including taking down old existing earthing complete all as specified and directed. Note : GI strip upto 7.5m including testing is deemed to be included in the rate quoted.

Excavation in trenches exc. 1.50m wide and not exc. 1.50m in depth and getting out in soft / loose soil complete all as specified and as directed.

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

Removing excavated materials not exc. 50m and depositing where directed at a level not exc.1.50m above the starting point complete all as specified and as directed.

M&L for sand cushioning (dry) in trenches for protection of UG cables (below, above and around the UG cable laid in trenches) of 230mm spread thickness and consolidated (punned) upto 180mm thickness complete all as specified and as directed. Note : For the purpose of payment, punning thickness of sand cushioning shall be measured and paid.

M&L for UG cable protection with sub-class 'B' bricks, laid dry, flat over cable perpendicular across the cable In trenches complete all as specified and as directed.

M&L for laying old serviceable bricks perpendicular to UG cable over the dry sand cushioning for cable protection complete all as specified and as directed

S&F XLPE insulated LT cable, screened, PVC bedded, galvanised steel strip or wire armoured cables (heavy duty) with aluminium conductor, 1100 volts grade, cross sectional area 95 sq.mm 3.5 core complete all as specified and as directed.

Supply, Installation, design, fabrication, testing and commissioning factory made and tested LT feeder pilar box (KIOSK), CPRI type test certified, outdoor type, platform mounted, suitable for 415 volts, 3 phase, 4 wire, 50 Hz AC with suitable capacity of CTs for measuring current, having bus bar chamber with insulated aluminium TPN bus bar 600 amps rating, installed on porcelain insulators. The panel shall be dust and vermin proof. IP 65 class protection and made of 3.15mm CRCA MS sheet and 50x50x6mm thick angle iron frame work, powder coated finish over one coat of red oxide primer outside and two coats of red oxide primer inside, front opening type with aprons for cable entry with double door shutter and locking arrangement internal wiring with PVC insulated copper conductor FRLSH adequate size complete all as specified and as directed. The scope of work includes with the followings:-

M&L for Gl tubes, 'light grade", galvanised, with all fitting laid in trenches of size 80mm bore complete all as specified and as directed.

M&L for boring of holes under road, pavement, hard standing by manually complete all as specified and as directed.

Taking down/out unserviceable or serviceable UG cables of any cross sectional area and connections including bricks, GI pipes, etc. of any descriptions, laid in trenches and/or fixing with walls/poles/panels, etc. including segregating of serviceable materials viz bricks, cables, GI pipes, etc. and keep in safe custody for re-use or removal from site complete all as specified and as directed. NOTE : Necessary excavation and earth work shall be measured and paid for separately.

M&L for re-laying/re-routing or passing through pipe, XLPE insulated, armoured, electric power UG cable (Heavy Duty) with aluminium conductor, HT/LT cable of any size and of any core including brass compression cable gland, terminal lugs,. etc. complete all as specified and as directed. NOTE : Required for excavation and earth work, bricks, sand, etc. to be measured and paid separately.

Supply, install, testing and commissioning of 630 KVA Servo Voltage Stabilizer (confirming to BIS 9815: Part-I:1994) three phase, 50 Hz, naturally oil cooled, indoor, unbalanced type, copper wound, metallic body duly powder coated with lifting hooks four Nos, digital display type, relay free smooth and silent operation with 1st filling of transformer oil (ISI marked) upto level complete all as specified and as directed with having following specification:- (a) Input voltage 360V-480V. (b) Output voltage stabilized at desired voltage 415V ± 1% (c) Rated frequency 50 Hz (d) No distortion in wave form (e) Response time not to exceed 20 mille seconds (f) Sensivity (±) 1% (g) Rate of correction 8 Volt/sec for single phase and 13 volt/sec for phase to phase (h) Efficiency more than 95% (j) Type of load : three phase, unbalanced type. (k) Digital display : Voltmeter / Ammeter Protections:- (i) Over load/ short circuit protections (ii) High/low voltage cut off (iii) By pass arrangement in case of emergency (iv) Single phase sequence change protection Note : Quoted rate is deemed to inclusive of required T&P.

M&L for earthing complete with GI earth plate electrode of size 600x600x6mm thick buried directly in ground with earth pit not less than 2.25m deep below ground level with top edge of plate not less than 1.5m below normal ground level connected to GI earth strip of size 20x3mm earth lead by means of nuts, bolts, check nuts, washers of galvanized iron as steel, protected by galvanized iron pipe 40mm bore (medium grade) including cement concrete (1:3:6) type C-1 (using 20mm graded stone aggregate) earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 45x45x5cm thick reinforced with 8mm dia TMT bars @ 15cm c/c both ways with 10mm dia mild steel round bar of 30cm long, bent to shape as lifting handle, funnel, wire mesh, 20mm bore galvanized iron pipe (medium grade) for watering, charcoal or coke and salt in alternate layers including necessary excavation & earth work in soft/loose soil complete all as shown in Electrical Plate No. 3 of SSR Part-I including testing on completion including taking down old existing earthing complete all complete as specified and directed. NOTE : GI strip upto 7.5m including testing is deemed to be inclussive with the rate quoting.

S&F copper strip of size 20mmx3.0mm complete with insulators and fixing screws for fixing the strip on wall/roof including taking down old unserviceable one complete 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) 1100 volts grade with stranded aluminium conductor of size 630 sq.mm, single core complete all as specified and as directed. NOTE:- The contract sum shall be derived by deducting the amount shown in Schedule of Credit attached to this tender from total amount of Schedule 'A'/BOQ.

AJOY DUTTA CHOWDHURY AND CO

M/S BARUAH ELECTRICALS

Bidder Name

AJOY DUTTA CHOWDHURY AND CO

ANIL RAI AND COMPANY

M/S BARUAH ELECTRICALS