Electrical Works

Amount

Supply, Testing, Commissioning and Handing over of 1No 250 KVA Diesel Generator set of 0.8 P.F. Three Phase 415/420 Volts, 50 C/S, 1500 RPM CPCB-IV Norms Approved capacity compressing of Engine BHP/ suitable BHP of water cooled clock wise rotating feed pump with 200KW/250KVA operating capacity brush less alternator close coupled underneath fuel tank standard, safeties, LLOP with stop solenoid, battery with lead, Electric start and vibration fitting & accessories and Standard Manual panel control panel as detailed below including transporting of unloading changes. (A). ENGINE Water cooled diesel engine suitable for Generator application with a shaft output suitable at 1500 RPM under NTP conditions. The Engine shall comprise the following standard fitting flexible coupling, fly wheel air cleaner ,fan blower, radiator, water pump, fuel pump, fuel filter lubricating oil filter etc., (B) 12/24 Volt Electronic starting Equipment Complete with starter motor, dynamo, standard batteries with cable, flexible exhaust piping of 50 cms length

( C ) ENGINE INSTRUMENT PANEL / MOUNTED Starting push button/ staring key, lubricating oil temperature gauge, lubricating oil pressure gauge, water temperature gauge, safety control for low lubricating oil pressure, safety control for high water temperature, safety control for over speed, hour meter (mechanical) and RPM indicator, battery charging ammeter. The engine should be capable of providing 10% over load for one hour for every 11 hours continuous at full load .D). Alternator 250 KVA/200 KW capacity of brush less alternator AC, Three phase 50 c/s, 415/420V,0.8PF, 1500 RPM under NTP conditions conforming to ISO-8528 Part-V to be means of coupling

(19) 1No Signal lamp for indicating load on set (20) 1No Signal lamp for indicating set fails to start (21) 1No Signal lamp for indicating ‘Set running ’(22) 1No Signal lamp for indicating ‘Battery charger ON ’(23) 1Set Pilot lamps of 3Nos (24) MCCB of 500A capacity with magnetic thermal over lead release, instant start circuit trip and under voltage release switch .(25) Rectangular copper bus bars (1No for each phase, neutral and earthing terminal) of adequate capacity duty colour coded with head shrinkable PVC sleeves. (26) 1No Mains Voltage monitor (27) Hooter/Audio Alarm for indicating set fails to start and for DG O/L (28) 1 Set Timers

(29) Audio and visual indication arrangements for: a. Low lubricating Oil pressure b. High water temperature c. Over speed 30) 1No Earth fault relay (31) Isolator to Isolate the neutral Note: 1. The control panel should be complete with necessary fuses, cables, labels, other accessories with neutral isolation arrangements 2 . The engine should trip for the following a. Low lubricating Oil pressure b. High water temperature c. Over speed. (F). FUEL TANK : Fuel tank of 600 liters capacity and with inlet and outlet connections level indicator with scale etc.,

(G).BASE FRAME : The Base frame should be fabricated MS channel frame of rigidly welded construction for mounting of generator set. The engine and alternator should be coupled by suitably designed diaphragm type flexible coupling with guard and mounted on the base frame with proper alignment. The supply of generator set includes loading .(H). ACOUSTIC ENCLOSURE The Acoustic enclosure be free standing floor mounting type with modular construction with the provision to assemble and dismantle easily and designed to suit all weather conditions.Erection of Acoustic enclosure suitable for 250 KVA Diesel generator complete with all accessories as above with required concreting and suitable supports etc., (i) Supply of manuals for operation & maintenance of DG set with warranty card etc.,

ERECTION AND TESTING AND COMMISSIONING Erection of 250 KVA Generator set with suitable foundation Pedestal height 5 ft with proper alignment of Genset including crane charges (Qtn)

Supply and installation of exhaust piping of sufficient length with suitable MS pipes so as to extend outside the generator room with necessary thermal insulations (DATA-A)

supply and fixing of 6 core 2.5 Sqmm copper cable on wall with MS clamps (DATA -B)

Supply and fixing of 400 A Three phase 500V 4 Pole Change over Switch on suitable angle iron frame work with MS cable entry boxes with earth connection only. (SD 664)

Supply and laying of 2runs 3 ½ x 240 Sqmm PVC armoured LTUG cable in suitable size HDPE pipe in a trench to be excavated at a depth of 0.75 meter and refilling the earth to make good (S.D -676 --- Rs 1608 x 2 = 3216)

Supply and clamping of 2 runs of 31/2 x 240 Sqmm PVC LTUG armoured LTUG cable with earth connection (S.D -213-Rs.1447 x 2 =2894 )

Supply and fixing of brass cable gland for 3 ½ x 240 Sqmm PVC armoured LTUG cable with earth connection (S.D. 172)

Supply and providing cable end termination of 3 ½ x 240 Sqmm PVC LTUG Aluminium armoured cable with necessary aluminium cable sockets by crimping etc., with electrical connection complete (DATA-C)

The switch should be separated by 6mm thick hylem sheet separators and properly double earthed as per IE rules. CEIG specifications. The panel should be powder coat paint of approved colour approved by the site officer and also the danger board. The capacity of the TPN size of incoming and outgoing cable the place to which the supply is fed should be mounted on switch chamber. The panel board should be mounted on 100mmx 50mmx MS channel provided all around the bottom of the panel. The whole arrangement should be erection of an angle iron frame pedestal to be constructed with suitable foundation bolts and nuts such that the lowest switch handle is at a height of 1.0 m from the ground level and with necessary earth connection (DATA- D)

Supply and laying of run of 2 x3 ½x185 sqmm PVC LTUG armoured cable in a trench to be excavated at a depth of 1.0 meter putting 0.15 meter layer of sand and covering the cable completely with bricks and sand and refilling the earth to make good(S.D 189 x 2 = 1292 x 2 = 2584)

Supply and clamping of Run of 3 ½x185 sqmm PVC armoured LTUG cable on wall with earth connection (S.D212x 2 = 1206x2 = 2412)

Supply and fixing of brass cable gland for 3 1/2 x 185 sqmm PVC armoured LTUG cable with earth connection (SD 171)

Supply and providing cable end termination of 31/2 X 185 Sqmm PVC LTUG Alu.armoured cable with necessary alu.cable sockets by crimping etc with electrical connection complete (SD 230)

Supply, Erection, Testing and commissioning of LT/ CT metering box of dust and vermin proof size 48” x 33” x 12” made up of 16 SWG CRCA sheet with confirming to IE rules specification 1) The metering box should be divided in to three separate chambers for metering chambers 2) The Metering chamber, Necessary space to the provided to fix one number Trivector meter and 1numnber 14 terminal box for Trivector meter 3) Bus chamber should be provided with 1” x ¼ copper flat for three phases and neutral. Buses should be moulded on suitable insulators with 3nos of 150/5A CT coil ( Kappa) 4) The metering chamber should be provided with glazed inspection door arrangement indication lamp arrangement should be provided with suitable control push button switch in the door of meter chamber 5) The doors of all the three chambers should be earthed with copper wire 6) The metering box arrangement should be erected on suitable MS channel arrangement 7) 1’x 1/8” copper flat of 0.4mt long used as earth bus and it should be fixed oat one side of the lower portion with suitable number of earth bolts. 8) The box should be painted with powder coated enamel paint 9) Neutral link should be provide inside the pillar box ( DATA – E)

Earthing as per ISI specification with an earth electrode of 2.1m class 'B' GI pipe of dia. not less than 40mm, with copper earth plate of size 125mm X 50mm X 6mm with necessary funnelling arrangements with necessary masonry work and with 38mm RCC cover slab for the brick masonry. (SD-211)

Supply and run of 25mm x 6mm tinned copper flat with necessary clamps/support on wall / floor/ground for earth connection (SD-77)

Supply and run of 25mm x 3mm tinned copper flat with necessary clamps/support on wall / floor/ground for earth connection (SD-76)

Thiru G. Ramachandran (BID ID -1554869)