SPECIAL REPAIRS /REPLACEMENT OF BER 100 KVA DG SETS ALONG WITH ALLIED WORKS AT OTA CHENNAI UNDER GE STM

Amount

BOQ UPLOADED ON 29 DEC 2022

SCH "A" PART-I (DG SET AND ALLIED WORKS)

Excavating in trenches, not exceeding 1.5m wide and not exceeding 1.5m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc not exceeding 10 sqm on plan and not exceeding 1.5m depth and getting out in any type of soil all as specified and as directed.

Earthwork is deemed to be carried out by manual method. However mechanised method may be adopted without any extra cost to the government.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25cm in any type of soil complete all as specified and as directed.

Removing excavated surplus soil to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed.

Fine sieved excavated dry soil laid to required width of trench at bottom and top for cable cushioning all as specified and as directed.

Punned thickness only shall be considered for measured.

The soil used shall be free from sharp grains and deletrious materials like dry / decayed plants etc.,

Common burnt bricks sub class "B" of old size, designation 50, laid dry in trenches with width equal to length of bricks across the cable for cable protection all as specified and as directed.

Taking out existing cable any type / cross section 120 sqmm and supply, laying, connecting and testing XLPE insulated, armoured, heavy duty electric cable with aluminium conductor, 1100 volts grade, in trenches / drawn through pipe / fixed on walls / bare in road crossings / paths / drains / ducts / floors / fixed on poles / equipments of size 3.5 core 120 sqmm complete all as specified and as directed.

Earthwork, sand cushioning, protection for cable etc., as required shall be measured and paid separately.

Lugs and glands shall be used appropriately wherever required while connecting cables to the panel board and the quoted rates are deemed be include for the same.

All as per item No above but for of size 3.5 core 95 sqmm

Taking up / down galvanised iron tubing including all fittings from trenches / walls / roof / floor etc., and removal from site under Sch of credit and provision of steel tubing, galvanised, light grade, with all fittings such as bends, elbows, tees etc., and laid in trenches / under roads / crossings etc., 80mm bore of pipe for cable protection complete all as specified and as directed.

Earthwork, cutting across roads etc., as required shall be measured and paid separately.

Material and labour Plain cement Concrete 1:2:4 Type B1using 40mm graded stone aggregates in mass concrete for making good the road

Earthing complete with galvanised iron earth plate electrode 600mm X 600mm X minimum 6mm thick, with and including earthing of 25mm x 4mm GI strip protected by 40mm dia GI pipe light grade upto a length of 7.5m. The plate shall be buried directly in ground vertically to a depth not less than 2.25 metres below ground level with top edge of the earth plate at a depth not less than 1.5 metres below ground level, connected to earth lead as described here-in-before by means of bolts, nuts, washers and checknuts made out of galvanised iron or mild steel, earthing lead protected by as described here-in-before and connected to main switch board or main control board or electric pole all as shown on electrical plate No.3 of MES Sch Part-I including necessary earth work and excavation in any type of soil, plain cement concrete 1:3:6, type C1 chamber, reinforced cement concrete cover slab with locking arrangement and handle of 10mm dia MS round bars 450mm long, 1:2:4 type B1, 50mm thick with 8mm dia TMT bars at 140mm centre to centre both ways, GI pipe of bore 20mm medium grade for watering with funnel, wiremesh, salt, charcoal, lugs including testing and taking down old earthing complete all as specified and as directed.

Supply, installation, commissioning and testing of silent type DG set complete with sound proof canopy, diesel engine driven generating set of microprocessor / relay based AMF built-in control panel, Output of 100 KVA at NTP, with 10 % overload capability in accordance with ISO-8528 and ISO-3046 AC 415 Volts, 3 phase, 4 wire 0.80 power factor directly coupled to diesel engine water cooled mounted on common MS fabricated frame with AVM pads weather proof as per CPCB norms, acoustic enclosure installed on a PCC hard standing , to be constructed by the tenderer as per manufactures’ recommendation ,with and including all excavation for PCC foundation, vibration dampers and other accessories comprising of ENGINE, ALTERNATOR, AMF CONTROL PANEL, GEN SET CONTROLLER, CONTROL SYSTEM AND MISC WORKS. Note : 1.The make DG set shall be Ashok Leyland of model No AL6DT1G1 or its equivalent manufactures as given list of makes 2.The capacity of generator set shall be net after all derating factors as per relevant design

ALTERNATOR: Suitable for Gen -Set application complete with accessories as per recommended by OEM.

DIESEL ENGINE: Adequate capacity diesel engine suitable to above alternator, Liquid cooled, to drive independently above alternator directly coupled to alternator through flexible coupling or multicylinder, multistroke, direct injection, cold starting, 1500 rpm, as per relevant ISI/BS-5514 complete with standard accessories all as specified and required for safe running and operation. salient features of accessories shall be as under:-(i) Flywheel housing,(ii) Air cleaner wet/dry type ,(iii) Fuel Filter,(iv) Fuel Injection system incl. Injection pump, solenoid switch, nozzle as per manufacturer's specifications,(v) Lubricating oil filter, bypass filter, oil cooler,(vi) Lubricating oil pump,(vii) Turbocharger,(viii) Radiator for liquid cooling,(ix) 12/24 volts starting system consisting of batteries of capacity as recommended by manufacturer, battery connections with copper leads and with lugs of adequate size, initial charging of batteries, battery charger/ generator with regulator, starter motor, starter gear, start and stop push buttons, ignition key and switch.(x) Residential type exhaust silencer complete with exhaust pipe of suitable size dia upto outside the acoustic enclosure, all covered with glass wool wrapped with aluminium foil of suitable swg adequate to create draft for safe exhaust without transferring vibrations to buildings/walls, flexible exhaust pipe complete.(xi) Microprocessor control electronic metering and module (ECPG) for indication of battery voltage, oil pressure, water pump, engine rpm, hour meter and protection against low oil pressure, high water temperature and over speed of engine incl. electronic governing.(xii) Battery charging indicator (xiii) Radiator cooling system comprising of radiator, radiator fan belt, water pump with belts, thermostat.(xiv) Fuel hoses.(xv) Separate fuel tank of suitable capacity Type Drag type in base frame all fuel supply lines as required at site and as per manufacturers instructions including return and overflow as well as fuel filling arrangements.(xvi) Air intake ystem,(xvii) Common base frame of sturdy design suitable for antivibration mounting and permanent concrete foundation for mounting engine and alternator as per manufacturers instructions

Gen set controller : It should be a micro processor based generator set monitoring and control system mounted in the Gen set control panel .It should provide a simple operator interface to the generator set.

Control system : It should have all the functions necessary to locally or remotely start and stop and protect the generator set. Key switch:- OFF and MANUAL/AUTO- in the off mode, the generator will immediately shut down (if running) and cannot be started. It also resets any fault. Manual start button -It should initiate a gen set in start sequence when the control is in MANUAL/AUTO mode. LED indicating lamps- It should includes LED lamp indication for the following functions :- (i). Fail to start (ii) Over speed/ under speed (iii) Low oil pressure (iv) High engine temperature (v) Battery charging alternator fail.

Acoustic insulated enclosure/canopy for Generating set:- Acoustic enclosure shall be factory made up of 1.6/2 mm thick CRCA sheets built and walls of the enclosure are insulated with fire retardant foam so as cmply with the 75 dBA at a mtr sound level conforming to the provisions of environment (protection) second amendment rules 2002 issued vide notification no. GSR371(E) dated 17 May 2002 at Sl No 94 (Para 1&3) and tested complete. The enclosure has the following features: (i) Specially designed to meet stringent MOEF/ CPCB norms of 75 DBA at a mtr 75% load under free field conditions. (ii) Single point lifting for easy handling at site. (iii) Air inlet louvers specially designed to operate at rated load. (iv) Insulation materials should meet exacting IS 8183 specifications for better sound attenuation. (v). Fuel drains for lube oil and fuel. (vi) Fuel filling point

Mounting arrangement: Engine and alternator are mounted on a common MS fabricated base frame with AVM pads including PCC Foundation as per OEM design..

Supply Fabricate, install, connect, test and commission LT electrical Feeder Piller panel board, AC, 3 phase, 4 wire, 415 / 500 V, 50 Hz, outdoor weather proof type, fabricated with 3.00 mm thick mild steel and suitable sized pressed steel frame work, top with sloping canopy, bottom with detachable plates,front and rear with hinged type door and locking arrangements, chamber for cable entry and exit, chamber for aluminium bus bars including aluminium bus bars of suitable for 1200 Amps as per IS specification insulated with coloured PVC sleeves mounted on suitable insulators and separators, holes drilled for connections, chamber for metering equipment complete suitable for mounting following switch gear items internally connected with suitable capacity aluminium strip/ rods insulated, complete mounted on PCC pillars including painting of panel board with two coats of synthetic enamel paint over one coat of red oxide primer and Existing cable of any size / type to be connected with proper termination with suitable glands , Overall Panel size H: 2.175 mtrs, L:5.600 mtrs W: 0.900mtrs complete including taking down of Old Unservicable Panel Board alongwith complete accessories and deposited in AGE E/M store yard GE STM all as specified and comprising of the followings:- INCOMING & OUTGOING :-(a)ACB with Microprocessor Release IPR 1 + (4 Pole) 800A-02nos(Incoming)Make: Havells /Siemens / Legrand/Schneider (b)ACB with Microprocessor Release IPR 1 + (4 Pole) 800A-01nos (for bus coupler) Make: Havells /Siemens / Legrand/Schneider (c) MCCB, 4 pole 250 A, 35KA-06nos ( 2 Nos for DG incoming).(d) MCCB, 4 pole 200 A,35KA-04nos.(e) MCCB, 4 pole160 A, 25 KA-06nos .(f) MCCB, 4 pole125 A, 25 KA-06nos .(g) Multi function Meter with CT & PTs-02 No.(h) Phase indication lamps - 9 Nos.(j) Interlock 5 lock 3 key for 2nos MCCB and 3 Nos ACB from reputated manufacturer.(k) All MCCBs are Panel mounted with handle operated.

Supply Fabricate, install, connect, test and commission LT electrical Feeder Piller panel board, AC, 3 phase, 4 wire, 415 / 500 V, 50 Hz, outdoor weather proof type, fabricated with 3.00 mm thick mild steel and suitable sized pressed steel frame work, top with sloping canopy, bottom with detachable plates,front and rear with hinged type door and locking arrangements, chamber for cable entry and exit, chamber for aluminium bus bars including aluminium bus bars of suitable for 600 Amps as per IS specification insulated with coloured PVC sleeves mounted on suitable insulators and separators, holes drilled for connections, chamber for metering equipment complete suitable for mounting following switch gear items internally connected with suitable capacity aluminium strip/ rods insulated, complete mounted on PCC pillars including painting of panel board with two coats of synthetic enamel paint over one coat of red oxide primer and Existing cable of any size / type to be connected with proper termination complete including taking down the old LT Panel Board all as specified and comprising of the followings:- INCOMING & OUTGOING :- (a) On-Load Changeover Switch 4 pole 250Amps-1 Nos (b) MCCB, 4 pole160 A, 25 KA-02nos (C ) MCCB, 4 pole125 A, 25 KA-02nos (d) Multi function Meter with CT & PTs-01 No (e) Phase indication lamps - 3 Nos. Note : All Switches and Timers are Panel mounted without Enclosures main switches with HRC fuses

Veera Electrical

C SRINIVASAN

EVEREST ENGINEERING WORKS