REPAIR MAINTENANCE OF HT DISTRIBUTION INCLUDING SERVICING OF HT EQUIPMENTS BREAKERS PROTECTION SYSTEM AND OTHER ITEMS UNDER GE BRICHGUNJ PORT BLAIR

Amount

Material and Labour for Jointing in repairs straight through joint, heat shrinkable, suitable for HT, XLPE cable with aluminium conductor of size 50 to 95 Sqmm, 11 KV rating and testing after jointing complete all as specified including dismantling old cable joint of any description complete including earth work all as specified and as directed.

Material and Labour for Jointing in repairs cable straight through joint, heat shrinkable, suitable for HT, XLPE cable with aluminium conductor of size 120 to 185 Sqmm, 11 KV rating and testing after jointing complete all as specified including dismantling old cable joint of any description complete including earth work all as specified and as directed.

Material and Labour for Jointing in repairs cable end termination kit, heat shrinkable, outdoor type, suitable for HT, XLPE cable with aluminium conductor of size 50 to 95 Sqmm, 11 KV rating and testing after jointing complete all as specified including dismantling old cable joint of any description complete including earth work all as specified and as directed.

Material and Labour for Jointing in repairs cable end termination kit, heat shrinkable, outdoor type, suitable for HT, XLPE cable with aluminium conductor of size 120 to 185 Sqmm, 11 KV rating and testing after jointing complete all as specified including dismantling old cable joint of any description complete including earth work all as specified and as directed.

Material and Labour for Jointing in repairs cable end termination kit, heat shrinkable, indoor type, suitable for HT, XLPE cable with aluminium conductor of size 50 to 95 Sqmm, 11 KV rating and testing after jointing complete all as specified including dismantling old cable joint of any description complete including earth work all as specified and as directed.

Material and Labour for Jointing in repairs straight through joint, tapex joint, suitable for HT, XLPE cable with aluminium conductor of size 95 Sqmm, 33 KV rating and testing after jointing complete all as specified including dismantling old cable joint of any description complete including earth work all as specified and as directed.

Material and Labour for identifying the earth pits, improving the resistance of existing earth pit by pouring salt water in earth pit to improve resistance up to 2 Ohms and measuring the earth resistance and making record complete all as specified and as directed.

Material and Labour in repairs Silica Gel breather capacity 250Gms made of Aluminium top and bottom, Transparent unbreakable centre portion to check silica gel condition; clear view Polycarbonate oil cup- Screwable type; Air Tight, center tie rod; Connection: 1/2 or 3/4 inch thread or Flange suitable of mounting in of capacity upto 400 KVA complete all as specified and as directed.

Material and Labour in repairs Silica Gel breather of capacity more than 1 kg made of Aluminium top and bottom, Transparent Acrylic centre portion to check silica gel condition; clear view Polycarbonate oil cup- Screwable type; Air tight ; center steel tie rod; Connection: 1/2 or 3/4 or 1 inch thread or Flange suitable of mounting in 1/ 2 MVA Transformers all as specified and as directed.

Material and Labour for preparation of old surfaces of 11 mtr high RCC Poles and applying one coat of cement based paint on RCC poles including painting black and yellow strips of 30 cm each on poles upto 1.0 m from the bottom and numbering with 60mm sized letter with synthetic enamel paint complete all as specified and as directed.

Dismantling of Insulators HT, 11 KV pin, post, disc type and removing from its locations, making good the disturbed surfaces to match with the existing surfaces, and taken as credit all as directed and as specified.

Supply and fix in porcelain/Polymer post insulator suitable for 11000 volts grade complete all as specified and as directed.

Supply and fix in Pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia for 11000 volts grade complete all as specified and as directed.

Supply and fix in repairs 33 KV post- top insulator double stack [2x22KV Each], porcelain vitreous white or Brown or green including galvanised mild steel straps as per sample all as specified and as directed.

Material and Labour for loose filling of 63 mm graded stone aggregates in plinths of out door transformer, sub stns, panel boards yard complete all as specified and as directed.

Material and Labour for cement concrete 1:2:4, type B-1 using 20mm graded stone aggregate as in walls etc., including necessary form work and finishing to exposed concrete surfaces even and fair complete all as specified and as directed.

Supply and fill Silica Gel in breathers size should not be less than 40mm complete including removing old silica gel all as specified and as directed.

supply and Filling fresh new EHV grade-II for topping up transformer oil duly filtered, ISI marked as per IS:335/93 with amdt. No.1 [Reaffirmed : 2005] dehydrated to give BDV value not less than 50 KV when tested with 2.5 mm gap electrode complete all as specified and as directed.

M & L for Online Filtration of transformer oil including checking Dielectric strength before and after filtration of oil for transformers located in Brichgunj area with suitable equipment having filtration, heating and pumping facility to improve the dielectric strength / insulation value of transformer oil complete all as specified and as directed. Note : Dielectric strength of transformer oil after filtration/dehydration shall not be less than 50 KV. Oil for topping up shall be measured and paid for seperately as supply only under relevant items of this schedule.

Supplying, laying, Jointing, testing and commissioning of HT UG cable, XLPE insulated, screened insulated, armoured and PVC bedded, 11 KV grade [heavy duty] suitable for earthed system with aluminium conductor of size 3 core 95 sqmm conforming to IS-7098 Part II laid in trenches, fixed to walls or passing through pipes and connecting up including taking out unserviceable cable complete all as specified and as directed. Note : Earth work excavation shall be measured and paid seperately under relevant item.

M & L for repairs to jumpers of existing size OH conductors length up to 2.0mtrs including fixing new 11KV OH conductor/jumper complete all as specified and as directed.

Supply only repairs top contact/ L contact for drop out fuse suitable for 11 KV all as directed by the Engineer in Charge.

Supply only bottom contact for drop out fuse suitable for 11 KV all as directed by the Engineer in Charge.

Supply and fix in replacement 33 KV DO Fuse Elements 40 Amps rating all as directed

Supply and fix in replacement 11 KV DO Fuse Elements 20 to 60 Amps rating all as directed

Material & Labour for Earthing complete with galvanised iron earth plate electrode of size 60cmx60cm× 6mm thick, buried directly in ground vertically at a depth not less than 2.25 metres deep below normal ground level with top edge of the earth plate not less'than 1.5 metres below normal ground level and surrounded from all sides by 15cm thick and packed layer of charcoal dust and common salt filling in alternate layers and electrode connections by using galvanised iron strip of size 32X6 mm by means of bolts, nuts, check nuts and washers made up of galvanised iron or steel and protected by light grade 40mm dia galvanised iron pipe connected to main switch board or main control board and GI pipe light grade 20mm bore for watering including funnel, wire mesh, RCC pit cover and PCC chamber pit with PCC 1:2:4 type B-2 [including necessary excavation and earth work, disposal of surplus soil to a distance not exceeding 50 mtr all as specified and as shown in electrical plate No. 3 connected to test point terminal all as specified or indicated including taking down old earthing & testing new earthing on completion all as directed. Note:-[a] The unit rate shall include for protection pipe, GI water pipe, wire mesh, funnel, excavation, RCC pit cover, PCC chamber pit, test point terminal block, 32X6 mm dia GI strip from top of earth plate upto 5 mtr above ground level and if GI protection pipe is less than 5 meters, no price adjustment shall be made.

Material and Labour for earthing complete with Copper earth plate electrode 60 x 60 cm x 3 mm thick buried directly in ground [ earth pit not less than 2.25 M deep below ground level] with top edge of the plate not less than 1.5 Meter below normal ground level connected to Copper strip of 32x6 mm as main earthing lead [upto 7.5 m length from earth electrode to test point] by means of galvanised iron or steel bolts, nuts , check nuts & GI washers and GI tubing 40 mm bore light grade for earth lead protection up to main earth test point and including concrete pit in PCC [1:3:6] type C1, pre cast RCC [1:2:4] type B1 as in cover slab 54 x 54 x 5 cm including 8mm dia MS TMT bars @ 150 mm c/c as in reinforcement with one handle for lifting made out of 8 mm dia MS bar, wire mesh, 20 mm bore GI tubing [Light Grade] for watering and funnel, charcoal or coal and salt in alternate layers including excavation earth work in any type of soil, RFR and removal of surplus soil complete all as specified and directed electrical plate No. 3 of SSR part - I complete all as specified and as directed.

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m deep for laying of cables, pipes, foundation for poles etc., and getting out in hard/dense soil complete all as specified.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified. Note : A deduction of 10% shall be made from total computed volume of filling to cater in bulkage irrespective of machinery used for ramming.

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

Supply and lay river sand for cable cushioning in trenches or in duct complete all as specified and as directed.

Supplying and laying unreinforced precast cement concrete cable cover, class HV, type 1 flat, size 300mm x 180mm x 40mm made out of M-20 grade PCC as per IS 5820:1970 for cable protection, embossed with "ELECTRIC" on top surface complete incl taking down old all as specified and as directed.

Material and Labour for dismantling Oil filled CT/PT from structure at 33 KV Switchyard after switching off supply and carefully removing electrical connection, checking the IR value, opening the top cover by taking down the bolts and nuts, draining oil, checking the dielectric strength of drained oil, filteration/ dehydration and building up the BDV value not less than 50 KV, refilling the oil, fixing back the top cover with new gasket and tightening bolts to restrict any leakage, cleaning terminals, scrapping thoroughly the existing corroded paint / rust, filling the cavities with suitable filler material & painting with one coat of silicon acrylic heat resistant paint of approved quality and colour, mounting back the PT/CT and giving necessary electrical connection all as directed and as specified.

Material and Labour for repair and overhauling of HT 11KV vertical circuit breakers Break switch, Outdoor type by cleaning the contacts, applying grease and replacement of defective unserviceable spare parts for easy operation on ground level complete all as specified and as directed. Note : i] All spares required to be replaced shall be measured and paid separately under relevant items of this schedule. ii] Minor items like nut, bolts, washers etc are deemed to be included in the quoted rate.

Supply only Male contact/Moving contact blade suitable for 11KV complete all as specified and directed.

Supply only Female contact/Fixed contact Jaw suitable for 11KV complete all as specified and as directed.

Material and Labour for decarbonsing/cleaning complete HT panels board, 11 KV cubicle type, consists of bus bar chamber, circuit chamber and metering chambers, by opening the spout/bus covers inspecting the bus bar joints, cleaning of bus bars, checking the bus bar spouts and circuit spouts for any flash overs/tracks, applying Becktol [red] solution to the bus bars and spouts having moderate tracking, applying HT insulated red compounds/Monoplist compound at the bus bar joints after tightening of joints, cleaning of bus bar insulators and bus bars with CTC and ensure proper decarbonisation and re-assembling complete all as directed by Engineer-in-Charge.

Material and Labour for decarbonsing/cleaning the cable compartment of Ring Main Unit 3 Way, 11 KV, consists of End joints,Current transformers, cable boots, bushings, by opening compartment cover by carefully switching off the main input cable supply and necessary switching ON of Earth switch of RMU thereby inspecting the end joints, current transformer, bushings and cable boots, checking the bushings for any flash overs/tracks, applying Becktol red solution to the bushings having moderate tracking, applying suitable HT insulated tape over anti tracking tube to prevent further tracking on, cleaning of end joints, CTs & cable boots with CTC and ensure proper decarbonisation and re-assembling complete all as directed by Engineer-in-Charge.

All as per item No 38 above but of RMU 4 Way

All as per item No 38 above but of RMU 6 Way

All as per item above but of RMU 10 Way

All as per item above but of RMU 1 Way

M& L for servicing and testing of HT vacuum circuit breaker of capacity up to 1250A, of any make, 33 KV, comprising of the following to the entire satisfaction of Engineer-in-Charge. Note: Quoted rate is inclusive for the following services:- [i] Checking the serviceability of the following parts carefully including cleaning, adjustments and re-assembling the unit complete. [ii] Checking the spring charging mechanism of the VCB, checking the operations of the closing/tripping trough closing/tripping coils electrically as well as manual charging including cleaning adjustments complete for the following. [iii] Checking the condition of the spring charging motor along with gear box including servicing to the motor commulator bushes, lubrication of bearing surfaces etc. [iv] Cost of additional hardware like, bolts, nuts , washers and spring washers, petrolium jelly ctc, to put the breaker in serviceable condition is deemed to be included in the rates quoted. [v] Making functional by carrying out minor repairs all the non functional circuits and indicating system like VCB Trip, CB ON, CB OFF, CB Service, Spring Charging etc [vi] Test shall include IR, CRM, time Test and all relevant routine test at site including submission of test reports. [vii] the above VCB servicing shall be carried out through authorized service agency of OEM only.

Taking down the HT vacuum circuit breaker of capacity up to 800A, of any make, 11 KV, for servicing and re-assembling complete, comprising of the following including testing and commissioning to the entire satisfaction of Engineer-in-Charge. Note: Quoted rate is inclusive for the following services:- [i]Taking out the VCB from the enclosure & checking the serviceability of the following parts carefully including cleaning, adjustments and re-assembling the unit complete. [ii] Cleaning the external surface of bushings with CTC/CRC or Liquid ammonia to remove the accumulation of dirt or any other deposits. Inspection of bushings and make sure that vibration due to breaker operation have not caused the bushings to move resulting misallignment of contacts. [iii] Checking the breaker bushing of bus bar and circuit side inspecting the interval surface carefully for any charging/trackings,replacement of bushings. [iv] Dismantling the spring charging mechanism of the VCB, checking the operations of the closing/tripping trough closing/tripping coils electrically as well as manual charging including cleaning adjustments complete for the following. [v] Checking the condition of the spring charging motor along with gear box including servicing to the motor commulator bushes, lubrication of bearing surfaces etc. [vi] Cost of additional hardware like, bolts, nuts , washers and spring washers, petrolium jelly ctc, to put the breaker in serviceable condition is deemed to be included in the rates quoted. [vii] Making functional by carrying out minor repairs all the non functional circuits and indicating system like VCB Trip, CB ON, CB OFF, CB Service, Spring Charging etc [viii] Test shall include IR, CRM and time Test. [ix] the above VCB servicing shall be carried out through authorized service agency of OEM only. [ix] All other spares will be measured and paid seperately as supply only under relevant items of this schedule.

Supply only spring charging motor suitable for operating in 240 V AC supply to be fixed in 11 KV /33KV VCB all as specified and as directed. Make : as per existing OEM as approved by GE.

Supply only anti pumping relay 30V DC for VCBs all as directed and as specified.

Supply only Trip circuit coil 30V DC suitable for 11 KV/33 Siemens/ Crompton make circuit breakers of all as directed and as specified.

Supply only space heaters 230 V, 80/100 W suitable for fixing inside VCB chamber along with necessary wiring for all as directed and as specified.

Supply and fix in repairs thermostat for space heaters of range 30- 110 degree suitable for fixing inside VCB chamber including wiring all as directed and as specified.

Supply and fix in repair Trip Neutral Close [TNC] Circuit breaker control Switches with 2 NO+ 2 NC contact arrangement of 25 A rating all as directed and as specified.

Supply , fix & replacement right angled cable boot carer cold type pushon suitable to cover the end connections of HT cable of size 95 Sqmm 3 core connected to 11 KV, 630 A Siemens Make 8DJ HST Model RMU all as directed and as specified.

Caliberation of Micro processor based numerical relay/ differential relay by conducting primary injection on rescpective CTs and secondary injection tests on relays,checking of current transformer including CTR Ratio, IR Value, CT Secondary Resistance Measurement Test, rectifiation of defects in control wiring for proper tripping of circuit breakers through CTs, relays and tripping coils,adjustment/setting of the relay to restrict fault to upstream breakers,re-installation of the relay in circuit complete all as specified and as directed. NOTE:- [a] The contractor shall provide necessary testing kits, testisng equipments,tools etc and shall also prepare the detailed test reports panel wise duly bound and submit to the department. Rate for the kits and equipment is deemed to be included in rate quoted. Testing and turning shall be carried out in the presence of Engineer-in-Charge to the satisfaction of department, failing which payment for the above item will not be made to the contractor. No claim from the contractor be enterained on this account. [b] Rate is inclusive of setting the parameters in differential relay and connecting after carrying out necessary polarity tests etc. [c] Testreport shall be submitted in seperately.

S & F in repairs of cell 3.6V DC, lithium -1/2 AA size [ER 14250] suitable for C&S make [CSPR- V5 model] protection relay fixed in RMU all as directed and as specified.

S & F in repairs hinges of door suitable for Siemens model 8DJHST RMU after removing the old broken hinges all as directed and as specified.

Supply and fix in replacement 3 pole Power contactor of 9 Amps Rating with 1 NO and 1 NC with coil voltage 110 V AC including Add On blocks with2+2NO & NC including necessary wiring and DIN Rail all as directed and as specified.

Supply and replace the HT PT fuses of porcelein insulated 11/12 KV, breaking capacity 45 KA, 3.15 Amps rating capacity all as direcetd.

Supply and fix in replacement 11 KV single phase current transformer [CT's] suitable for existing mode circuit breakers conforming to IS-2705, VA burden - 15VA, class of accuracy - 0.5/5P-10, three core type of CT as per existing with CTR100-50/5-5A complete all as specified and as directed.

Supply and fix in replacement 11 KV single phase current transformer [CT's] suitable for existing mode circuit breakers conforming to IS-2705, VA burden - 15VA, class of accuracy - 0.5/5P-10, three core type of CT as per existing with CTR200-100/5-5A complete all as specified and as directed.

Supply, Fixing in replacement and Testing of PT Assembly, 11 KV Grade, Dry Type suitable for 800 A VCB, Clas0.5 capacity 100 VA, 11000 / √3 / 110 / √3 insulation level 12 / 28 / 75 KV, Voltage Factor 1.2 continuous etc. including taking down of old and unserviceable PTs from VCB Panel etc. complete all as directed by Engineer-in-charge.

S & F in replacement maintenance free Battery for RMU 12V, 7Ah capacity all as specified and as directed.

S & F in repairs of cell 3V DC, lithium [CR 2/3AZ] 1600mAh suitable for Siemens make protection relay fixed in RMU all as directed and as specified.

S & F in repairs of cell 3.6V DC, lithium [ER14505] min 2000mAh suitable for fault passage indicator[FPI] fixed in RMU all as directed and as specified.

Supply and fix in replacement epoxy LV bushing suitable for 1000 KVA Step up transformer of Make CG with copper bus bar after taking proper shutdown of transformer, disconnecting the cables, draining out theTransformer Oil in barrels, opening the top cover all as specified and as directed. Note: [a] The quoted rate is inclusive of connecting back the top cover, Filling the drained transformer Oil, connecting back the cables and checking for any leakages. [b] Gaskets required [if any] shall be deemed to be included in the quoted rate.

M & L for Inspection and carrying out B-Checks of11KV , 2000 KVA, HTDG Set Once in Six months or 300 Hours of Run whichever is earlier installed at various locations by representative / authorised Service Engineer of OEM of the DG Set including inspection, maintenance, changing all types of filters and servicing of DG Set including Alternator, Non AMF / AMF Panels connected to DG Sets for routine check-up including routine / preventive maintenance checks, checking up of engine and alternator for the smooth functioning as per the Manufacturer’s instructions including checking of Engine Oil Level, Oil Bath Cleaner Oil Level, Draining Sediments from Fuel Tank, checking of Pre Cleaner Dust Pan, Air Cleaner Restriction, Coolant Level, Recording Oil Pressure, Checking / Tightening of all Bolts / Nuts of Engine and Alternator, checking of AVM Pads, Diaphragm Coupling, Air Piping, cleaning of Oil Bath Air Cleaner Tray Screen, check / adjust Belts, checking Battery Voltage, Water Level and apply Jelly on Terminals, checking Fan Hub / Air Blower Hub and Water Pumps, cleaning of electrical connections with CTC solution, checking of safety controls, cleaning of Cooling System, cleaning of Engine and Radiator Assembly, including cleaning of Air Filter using Pressure Air, Corrosion Inhibitor, O Ring, Gaskets, Screws etc. and draining out old engine oil from oil chamber and removing deposited material including applying Grease, CRC in moving parts and draining out water from radiator assembly and refilling new after mixing with coolant including tightening of all inlet and outlet connections and replacing minor items such as Hose Clamp, Screws, Washers etc., cleaning of Roof, Floor of the DG Set Room complete all as specified and as directed.

Note: The Contractor shall submit set of all drawings and techinical specifications of the Transformer and its components in duplicate and get the same approved from Accepting Officer before commencement of production/ Manufacturing. The contractor shall furnish all details and clarifications required if any for scrutiny and evaluation. Manufacture of material to be supplied shall be done strictly as per approved drawing. However, approval of drawing shall not absolve the contractor/supplier of his liability for ensuring correctness according to applicable standards & regulations.

Supply only Lub Oil Filter ,Cat No: P4324909 of Perkins

Supply only Fuel Filter Primary ,Cat No: P759205 of Perkins

Supply only Element Air Filter,Cat No: P4526544 of Perkins

Supply only Antifreeze Premix Coolant Inhibitor extended Life Type, Cat No: PI60HOAT of Perkins

supply only Perkins Diesel Engine Oil [DEO] ,Cat No: PT430313 of Perkins

Supply and replacement of unserviceable rubber matting with new one of 2mm thick 1M X2 M LT ISI marked complete all as specified and directed by Engineer -in-Charge.

Material and Labour for replacement of Dial type 100mm dia oil temp meter suitable for 100 KVA to 400 kVA,11KV/ 433V transformers complete all as specified and as directed.

S &F in replacement of HV side Brass studs threaded both ends of suitable size and length including metal and rubber rings, bolts, washers etc., suitable for 100 to 400 KVA Transformer, Indoor or Outdoor type, 11KV/433V, step down of any make/model complete all as specified and as directed.

S &F in replacement of LV side Brass studs threaded both ends of suitable size and length including metal and rubber rings, bolts, washer, etc., suitable for 100 to 400 KVA Transformer, Indoor or Outdoor type, 11KV/ 433 V, step down, of any make / model complete all as specified and as directed.

Supply and laying GI pipe 100mm dia light grade including all fittings complete laid in trenches/in floor, fixed on wall/ on pole for protection of underground cables all as specified and as directed by Engineer -in-Charge.

Supplying , laying, Jointing, testing and commissioning of HT UG cable, XLPE insulated, screened insulated, armoured and PVC bedded, 33KV grade [heavy duty] suitable for earthed system with aluminium conductor of size 3 core 95 sqmm conforming to IS-7098 Part II laid in trenches, fixed to walls or passing through pipes, properly fixed with suitable cable glands and connecting up including taking out unserviceable cable complete all as specified and as directed.

Material and Labour for replacing old duct cover with new mild steel duct covers with plain/ chequered plate of thickness as directed by engineer in charge with frame of angle or other section complete drilled/ welded for fixing of steel sheeting to be prepared for hanging or sliding with and including hooks complete conforming to Fe- 290 [Gde-E165] inclusive of one red oxide primer coat, one under coat and one finishing coat of sythetic enamel paint incl dismantling existing cover all as directed.

Material and Labour for shifting , after disconnecting HT/LT connections of transformer upto 400 kVA 11KV/433V, shifting from any location inside Brichgunj and connecting HT/LT side to provide power supply at other location as directed by Engineer in Charge.

Supply and fix in repairs terminal clamp along with bimettalic strip as per existing model made up of aluminium/ SS along with bolts, nuts and washers suitable for ACSR Conductor to be fixed on 33 KV AB Switch all as directed and as specified.

M & L in replacement of Earth continuity conductor or main earthing lead of 75 x 8 mm galvanized iron strip, buried in 33/11KV yard after removing the aggregates, connecting to existing system by electric welding and GI bolts/nuts/Washers complete all as specified and directed.

All as sbove but of size 50 x 6mm all as directed and as specified.

M&L for painting on old surfaces HT panel/ Steel Structures by spray paint after cleaning strains and grease/oil spots with sand paper & thinner and painting the cleaned surface with synthetic enamel paint of existing colour to achieve good finish by applying two coats of paints by spray painting machine carefully after disconnection of power supply and covering the any meters, indicators nameplates and switches to prevent from fall of paint drop on them all as directed and as specified by Engineer in Charge.

Material and Labour for single phase out door type oil cooled potential transformer [PT's] conforming to IS-3156, Ratio:33kV/R3/110V/R3, Burden - 50VA, class of accuracy - 0.2, Frequency:50 Hz, Voltage factor: 1.2 continuous & 1.5 for 30 sec, Ins Level: 70kV/170kVp, INS class-A,Vk> 50V[ core 1 & 4] Type of C, complete including first fill of oil and taking down old from existing location all as specified and as directed.

Material and labour for 33 KV,single phase out door type oil cooled current transformer [CT's] conforming to IS-2705 of ratio 75/1 Amp, class 0.2 / 5P20, burden 15 VA complete including first fill of oil and taking down old from existing location all as specified and as directed.

Material and labour for lightning arresters [set of three] expulsion type, complete with all fittings, transmission class discharge capacity 65 Kilo amps, 33000 volt grade on structures with suitable arrangement complete all as specified and directed including removing the unserviceable 33KV lightning arrestor. Make: Alstom/OBLUM Electricals/ Crompton Greaves/Areva

Supply and replacement of unserviceable rubber matting with new one of 3mm thick 1M X2 M HT ISI marked complete all as specified and directed by Engineer -in-Charge

M&L Glow sign board [Bakelite] details of sub stations of letters size 100mm on flexy [1500mmx1500mm] with vinyl digital cutting and pasting with suitable tube light fitting including chokes and electrical connections complete all as specified and directed by Engineer-in-Charge.

S&F in repairs of auxiliary power supply system of 110 Volts for protection of VCB panel including synthetic rubber chamber, testing and commissioning complete by using a set of 55/44/28 No maintenance free lead acid batteries of 2/2.5/4 volts 200AH capacity each complete all as specified and directed.

Supply and fix Aluminium conductor steel reinforced [ACSR] of any type including binding with and including suitable size of binding wire/ crimping lugs of suitable size/connecting to clamps with suitable GI bolts, nuts and washers complete Including dismantling and taking out worn out ACSR conductor from 33 KV yard all as specified and as directed

Supply and fix in replacement Copper Tube for bus bar of size min 20mm outer dia on 33 KV tower including bracing and jointing tube, connecting clamps and tightening the bus bars over the insulators including disconnecting the old copper tube bus bars all as specified and as directed. Note: Thickness of the bus bar shall be as per the sample or as decided by Engineer in Charge.

M & L for servicing of transformer of capacity 2MVA , 33/11 KV ratio and carrying out preventive maintenance, technical inspection and testing by skilled mechanic/specialist and experienced in working on in electric HT 33 KV line complete all as specified and directed. Note :- [a] Checking of winding temperature & oil temperature. In case of unsatisfactory condition shut down the transformer and investigate if either is persistently higher than normal. [b] Checking of oil level and examine transformer for oil leaks. [If low level , toping up with transformer oil, which shall be measured & paid separately]. [c] Checking of Dehydrating breather of silica gel [Replacement silica gel if required will be measured & paid separately] [d] Checking and cleaning of primary & secondary bushing from dirt and oil. [e] Checking of oil dielectric strength and presence of water moisture. [f] Checking, cleaning & testing of relays, alarm signal & contacts, fuses, circuits, their operation including change in setting, if necessary complete [g] Checking & testing of earth resistance. [h] Checking & testing of insulation resistance of windings [j] Checking of cable box condition . [k] Checking & tightening of bolts/nuts and other loose metallic parts. [l] Taking expert opinion in case of abnormal noise, abnormal temperature, electrical faults, alarm signal through Buchholz Relay etc.[l] Painting of the transformer with two coat of synthetic enamel paint [m] Checking leakges from entire transformer and replacement of gasket / packing [n] All testing tools, equipments and other T & P, hydra vehicle for lifting top cover of transformer required for technical inspection, T&P required for replacement of packing shall be provided by the contractor & cost also included in quoted rate.

M & L for Servicing to air-break switch /isolator off load, rotating type, 33 KV, of 600 Amps capacity , with proper alignment of isolator rotating blades with fixed contact jaws, arcing horns, applying petrolium jelly to moving mechanism, cleaning and lubricating to isolator control assembly, tightening all nuts/bolts of isolator assembly and clamps of jumpers etc, repairing to isolator control assembly and making in proper serviceable condition for smooth functioning, testing and commissioning on load complete all as specified and directed.

Supply & fix in repairs male /moving contact / rotating blade of HDE copper silver plated of air brake on load isolator switch rotating type 33 KV, of 600 Amps capacity with all fixing nuts bolts etc. Make : Kurgg/Pactil / Jaipuria/BHEL all as specified and directed.

Supply & fix in repairs fixed female contact made of HDE copper silver plated of air brake off load isolator switch rotating type 33 KV, of 600 Amps capacity with all fixing nuts bolts etc all as specified and directed.

Supply and fix in replacement outdoor type 400 Amps nominal current rated, 33 KV, 3-phase, triple pole, double break, gang operated, centre rotating type Isolator with gang operated Earth switches, including Insulators and complete in all respects with arcing horns , bimetallic connectors, operating mechanism devices, fixing complete with GI operating pipe of heavy duty complete all as directed. Note: Rate is inclusive of following:- [a] Each pole unit of the multipole Isolators shall be of identical construction and mechanically linked for gang operation [b] All isolators as given in the schedule of requirements shall be suitable for horizontal upright mounting on structure [c] Moving contacts of all isolators shall rotate through 90 degree from their “Fully Closed Position” to “fully open position” so that the break is distinct and clearly visible from ground level. [d] Fixed guides shall be provided so that even when the blades are out of alignment by one inch [maximum] at the time of closing of switches, proper seating of the blades in between the contacts and adequate pressure to give enough contact surface are ensured, whenever possible, the blades shall be counter balanced by weights & springs at the end of the travel both on opening and closing of the isolator. The springs shall be made of durable and non-rusting type alloy.

The isolator shall comply the following: i] System frequency with + 3 % variation [Hz] : 50 ii] Nominal system voltage [KV r.m.s.] : 33 iii] Maximum system voltage [KV r.m.s.]/ Rating Voltage : 36 iv] Maximum continuous current rating [Amps.] : 400 v] Rated short time current for 3 seconds [KA r.m.s] : 28.8 vi] Rated peak withstand current [KA peak] : 72 vii] 1.2/50 micro-sec lightning impulse withstand voltage [KV peak] a] To earth and between poles : 170 b] Across the isolating distance : 195 viii] Rated one minute power frequency withstand voltage [ KV r.m.s.] a] To earth and between poles : 70 b] Across the isolating distance : 80 ix] No. of poles : 3

M &L for Servicing / maintenance of transformer 11 / .433 KV indoor / outdoor type , plinth mounted type including the following work services :- [a] Disconnecting transformer from electric system and providing electric power to user from alternative arrangement including taking out from existing position . [b] Decanning of transformer oil , opening top cover , disconnecting of all internal connections , lifting and taking out of core assemble , LT / HT bushes, Tap changer etc ,cleaning and inspection of core and winding , segregation of serviceable and unserviceable items , removing of sludge and cleaning tank and cooling pipes / fins /tanks and drying the tank complete. [c] Replacinig unserviceable LT / HT bushing by replacing rubber / cork oil seals and damaged terminal rod & replacement of Transformer cover gasket of rubber cork sheet. [d] Re installation of TFR including reassembling of core / winding assebly complete including replacement of unsv parts , repair the defective parts and tighting of all loose / sparks wire / nut bolts etc and refixing the to the existing position , connecting with HT/LT cables and earthing strip and testing complete including necessary Transportation [ If required ] to the work shop and back and including Dehyderation and refilling of existing or new transformer oil of required quantity . [NOTE FOR ITEM :- [i] Dehydration of oil and new Transformer oil shall be measured seperately . [ii] HT & LT Bushing , Tap Changer will be measured & Paid separataly. [iii] The rate of cork sheet & Packing Material for following cap of TFR are included in quoted rate of transformer capacity upto 160 KVA.

As Per Item No 98 above But capacity 200 to 300 KVA .

As Per Item No 98 above But capacity 315 to 400 KVA .

Supply only of transformer HT bushing porcelain with copper stud, nuts, bolts, washers, gasket, oil seal suitable for outdoor type Transformer of capacity upto 160 KVA .

As Per Item No 101 above But capacity 200 to 300 KVA .

As Per Item No. 101 above But capacity 315 to 400 KVA .

Supply only transformer LT bushing porcelain with copper stud/ Bar, nuts, bolts, washers, gasket, oil seal suitable for indoor/outdoor type Transformer of capacity upto 160 KVA . Complete all as directed.

As Per Item No. 104 above But capacity 200 to 300 KVA .

As Per Item No. 104 above But capacity 400 to 500 KVA .

Material and Labour for Lifting the transformer from its plinth / pole structure inside the fence area with the help of suitable crane and transporting to workshop for carrying out necessary repairs and bringing back and re-installing in its original place complete all as specified and directed by Engineer-in-Charge for the following capacity of transformers:- [Note : Repairs required shall be measured and paid separately under relevant items of items] up to 160KVA

As Per Item No 36 above But capacity 200 to 300 KVA .

As Per Item No36 above But capacity 400 to 500 KVA .

Taking out complete core from transformer, cutting and removing burnt out winding [primary [HV] and secondary [LV]] and re-winding the same with super enameled copper conductor of existing gauge together with insulation materials, applying varnish, pre-heating in heating chamber, re-assembling the transformer as per the original and testing on completion complete all as specified and directed by Engineer-in-Charge for distribution transformer of capacity up to 400 KVA of any make/ Power Transformer of capacity upto 2 MVA of any make.

Supply and replacement of unserviceable rubber matting with new one of 12mm thick 1M X2 M 33KV HT ISI marked complete all as specified and as directed.

Supply and fix Colour coding as R ,Y ,B sleeves for ACSR conductor for 33kv yard complete all as specide dand as direted.

Sree Tirumala Enterprises (BID ID -3153583)