Electrical Works

Amount

Supply and clamping at 11 KV 3 core 300 sq.mm XLPE HTUG cable in existing trench / pipe laid in Existing trench.

Supply and providing cable end termination suitable for 11KV 3 core 300 sq.mm XLPE HTUG cable with necessary indoor type heat / cold shrinkable joint kit and accessories. (Make:RayChem / M.Seal.

(Incom-1 No) 5) Protection: TP ND IDMT 2OC + 1EF Relay with Highest inst.Elements similar like Megawin type MCDG 61 (Incom-1No) 6) TP ND IDMT 2OC + 1 EF Relay similar like Megawin type MCDG 31 Master trip Relay Megawin MVAJH 13 (Incom-1No & Out-1No) 7) Breaker ON/OFF/Auto Trip/Healthy/Spring Charged Indication Lamp LED Type 8) Phase Indication Lamps R,Y,B(Incomings 3Nos) Control Wiring 9. 630Amps Copper Bus bar PVC Sleeved and required panelcopper earthing. 10.Control switch TNC (Incoming-1 No, Outgoing -1No) 11.Trip Circuit healthy Push Button(Incoming-1 No, Outgoing -1No) 12. Common for Switch gear, MCB's for AC DC Control, Heater ON/OFF Switch with space Heater and thermostat Single phase switch socket, cubicleMCB's for AC DC Control, Heater ON/OFF Switch with space Heater and thermostat Single phase switch socket, cubicle illumination lamp, Disconnecting type terminal Block.etc., 140 MS Sheet enclosure for Indoor Installations Powder coated with paint shade Siemens grey,paintfinish through bottom entry to receive Incoming and outgoing cable glands and cable terminations etc. (Megawin /voltec / or equivalent)

Supply and fixing of 800 A FP changeover switch with spreader Terminal and Rotary handle in suitable angle iron frame work with enclosure and to connect the cables for the Extension copper bus bar for 3 phases and neutral ( 50mm x 12mm) and 2 Nos. of earth bus of size 1” X 1/8 tinned copper bus(25mm x 3mm)in suitable bus bar insulator(Epoxy insulator) complete connection etc.,

Supply and fixing of 630 A FP changeover switch with spreader Terminal and Rotary handle in suitable angle iron frame work with enclosure and to connect the cables for the Extension copper bus bar for 3 phases and neutral (50mm x 10mm) and 2 Nos. of earth bus of size 1” X 1/8 tinned copper bus(25mm x 3mm)in suitable bus bar insulator(Epoxy insulator) complete connection etc.,

Supply and clamping of 1 Run 3 ½ x 400 sqmm XLPE FRLS armoured LTUG cable on wall/ existing cable trench/existing cable tray with MS Clamp.

Supply and fixing of brass cable gland for 3 ½ x 400 sq.mm PVC LTUG armoured cable with earth connection.

Supply and providing cable end termination of 3 ½ x 400 sqmm PVC LTUG Aluminium armoured cable withnecessary aluminium cable sockets by crimping etc. with electrical connection complete

Design, Supply, erection, testing and commissioning of 1600A Copper Flexible end joints from Bus duct end to 1600A LTACB termination end and Bus duct end to 1000 KVA Transformer bushing Secondary side. The bus–bars joints shall be supplied with flexible expansion joints at both the ends and also at bends. The supports and expansion arrangement shall be so chosen to avoid undue stress to the bus – bars, supports and end connections.(1000 KVA TR Secondary side-1 Set,1600A LT ACB Incoming side-1Set .

Design, Supply, erection, testing and commissioning of 1600A Alu. Bus Ducts made up of 16 SWG sheet steel minimum thickness of 1.8 mm bolted on to an angle iron / structural steel framework.covers the requirements of 3 phase 415 V, 50 Hz, 1600A continuous rated, Alu.TPN bus with enclosure suitable for indoor type. The bus – duct shall be designed for the above current ratings and for a maximum temperature rise of 400C over an ambient temperature of 45°C. The bus – bars shall be of hard drawn high conductivity Alu. flats of size 3Runs x 50x12mm electrical grade 63401-WP as per IS: 5082 The bus- bars shall be of uniform cross section along its entire length. No tapering of the bus bars’ cross-section is allowed. The bus duct shall be painted after suitable pretreatment of all structural steel and plates with anti-corrosive epoxy base primer paint & two coats of anti corrosive epoxy base

thickness of 1.8 mm bolted on to an angle iron / structural steel framework.covers the requirements of 3 phase 415 V, 50 Hz, 1600A continuous rated, Alu.TPN bus with enclosure suitable for indoor type. Inner surface of the bus – duct shall be coated in the rubber paint. The bare bus –bars shall be provided with a coat of Matt finish, The joints in the bus –bars shall be of the bolted type and it shall be ensured that the following precautions are observed. i). The contact pressure must be ample and this shall be maintained during the time the panel is in service. ii. The surfaces of the conductors must be clean. iii. With flat conductors, the overlap should be equal to or greater than the width of the bars or ten times the thickness of the bar whichever is greater iv. The joints shall be treated by the application of joint compound to render the joint moisture-proof. v. For the joints use of bolts of cadmium plated high-tension MS bolts having expansion characteristics due to temperature change similar to the conductor may be used with steel nuts. vi. Smearing the surfaces with oxide inhibiting grease just prior to making the joint in order to preserve the efficiency of the joints.

Minimum phase and earth clearance required shall be maintained at joints. The joints shall be thoroughly shrouded. The bus bar arrangement shall generally conform to IS: 5578 and IS: 11353. The bus – duct shall be also supplied with suitable earth bus running all along the length of the bus – duct Current density at any part shall not exceed prescribed limits. Two flats of same phase shall be stacked together or the spacing between them shall be maximum of the thickness of one conductor. The busbars shall be phase identified by colour, at intervals. Colour code shall be RED, YELLOW and BLUE for phase and BLACK for the neutral bus – bar. Bus – bars shall be supported on tough, non-hygroscopic, resin bonded self-extinguishing fire retardant insulators preferably of SMC / DMC with ribbed construction to prevent tracking due to dust paths. Bus – bars and supports shall withstand the maximum stresses that are induced in the event of. The short-circuit currents being as specified. The bus – bar support shall be at a minimum interval of 500mm. 5 Deg.C above the ambient. The clearance between the individual bare phase power bus – bars and between the phase and earth bus –bars in air shall be not less than 25 mm and 19 mm respectively.

1600A MV PANEL:- Design, Supply, erection, testing and commissioning of 1600A floor mounted MV cubical panel board bus bar chamber dust and vermin proof and accommodating the following switch and 1 No.1600A ACB as Incomer units with the following items of work complete to satisfy the latest IS rules and CEIG guidelines. Supply and fixing of suitable size bus bar chamber made up of 16 SWG MS sheet steel with 4 Nos ie R,Y,B,N.of 3 Runs 2” X 1/2”( 50mm x 12mm) tinned copper bus bar for 3 phases and neutral and 2 Nos. of earthing bus of size 1”X ¼ (2 x 25mm x6mm) Alu.flat bus on suitable bus bar insulator (Epoxy insulator)With maximum creepage distance and supported on MS Base channel frame work ofsize 4”X2”X¼-1Set(100mm x50mm x6mm) Incoming:-1)Supply and fixing of 2 Nos. 1600A basic rating 4 pole 433V LT ACB confirming to IS 13947 – 2 IEC 60947 – 2 for higher breaking capacities of 65KA at 690V AC with all accessories for standard horizontal manual draw out type ACB equipped with auxiliary contacts and all accessories for closing and opening operation with micro processor SR 18 G relay, over current trip device adjustable to LTD, STD and release for over current protection UV release with time delay, EF release short circuit protection, Mains CTs for 3 phases lockout, features, separate mould base for each pole for easy

maintenance all relevant protection safety accessories as per CEIG, IE rules inforce with interconnection and terminations as required in specification. Outgoing 1) Supply and fixing of 800A TP MCCB with extended Rotary handle and spreader terminal --2Nos 2)Supply and fixing of 400A TP MCCB with extended Rotary handle and Spreader terminals --2Nos 3)Supply and fixing of 250A TP MCCB with extended Rotary handle and Spreader terminals -3Nos Inter connecting the all LT ACB’s and MCCBs to two bus bar with suitable insulated tinned copper flats and painting of phases and neutral indication Double Earth connection of the MCCBs and ACB’s to earth bus using suitable tinned copper flats by 2 runs of 1” X 1/8” Supply and fixing of LED lamp arrangements with toggle switches to the control to each phases and with rigid connection in suitable separate compartments with in the cubicle by CEIG rules with 1set of supply and fixing Electronic Trivector EC, 300P class 0.5 Base mounting L&T or equivalent.(Make–Model. ER300P class 0.5) Supply and fixing of danger board with siemens grey powder coating with super scribing the names of places to which supply is fed feeder sizes of cables direction of cables etc.Erection of panel board complete with suitable foundation bolts and nuts including suitable M.S Channel,concreting, testing and commissioning (L&T/Siemens/Legrand)

Supply and fixing of GI /Powder coated 14 SWG Cable tray of size 300mm x 50mm x2mm thick on wall / ceiling wth necessary Thread rod support complete

Supply and fixing of GI/Powder coated 18 SWG Cable tray COVER of size 300mm x50mm covered on the top of cable tray complete.

Supply, fabrication and erection of MS Section like 5mm thick plates, Angles, rods as per IS Standards having Yield strength of E-250 as per approved connections including hardwares like Anchor bolts, Foundation bolts etc.,required cable trays.One coat of redoxide primer and two coat of synthetic enamel paint approved colour and make including transportation, cutting, threading, machineries etc., complete.

Earthing arrangements with GI Earth Plate including charcoaland salt with necessary excavation in all soils and to full depth as may be required and masonry work, re-filling the sides of foundation with excavated earth as per the standard specification and as directed by the Departmental Officers.

Supply and run of 25mm x 3mm( 1” X 1/ 8”) copper flat with necessary clamps/supportson wall /floor/ground for earth connection .

Aruna Electricals (BID ID -1496242)