REPAIR AND REPLACEMENT OF SPARES TO 11 KV SWITCH YARDS DEHYDRATION OF TRANSFORMERS, CERTAIN REPAIRS TO 11 0.433 KV SUB STATIONS AND 132 11 KV MAIN RECEIVING STATION INCLUDING REPLACEMENT OF FAULTY HT CABLES AT RCI HYDERABAD

Amount

Supplying, laying, jointing, testing and commissioning of 3 Core 120 Sqmm, 11000 volts grade, Earthed, HT XLPE insulated, insulation screened with extruded semi-conducting compound in combination with copper tape (0.3 KA for one second), cores laid up, PVC inner sheath with fillers, galvanized steel flat strip armoured, heavy duty, electric cables, with multistranded aluminium conductor, conductor screen with extruded semi conducting compound and overall PVC sheathed cable as per IS-7098 (Part-2) 1988 with latest amendments, laid in trenches/ passing through pipe/duct/road crossing or fixed on poles, walls with suitable size clamps made out of mild steel flat iron including jointing material such as crimping type lugs, brass cable glands, heavy duty double compression type etc., including disconnecting and taking down unserviceable cable complete all as specified and directed. Note : Earthwork excavation, sand cushioning, GI pipe and cable protection will be measured and paid separately.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m depth and getting out in soft sol complete all as specified and directed.

Supply and spread M crushed sand free from clay clay filled in trenches for cable cushioning covering both top and bottom of cable and punned down all as specified and directed. Note : Punned thickness will be measured for payment.

Returning, filling in , including spreading, levelling, watering and well ramming in layers not exceeding 25 cms complete all as specified and directed.

Removal of excavated soil to a distance not exceeding 50 mtrs and deposited where directed at a level not exceeding 1.5mtrs above the starting point all as directed.

Supply and lay un reinforced pre cast concrete cable cover class HV type I flat size 300X180mmX40mm all as specified and directed.

Cutting of existing bituminious/PCC road or flooring/plinth protection, for laying of GI pipe in road intersection for passing of HT XLPE cable including excavation in any type of soil, returning and filling in and making good top 30cm of the trench by providing PCC 1:2:4 type B1 using 20mm graded stone aggregate to flush with existing road surface complete all as directed.

S&F, 150mm dia GI pipe light grade fixed to walls/poles or laid in trenches, road crossing etc., for protection of underground cable/earth strip including sealing ends with hessian cloth impregnated with bituminous compound in ground and with teak wood bushes for ends fixed on walls/poles complete all as specified and directed

Disconnecting and cutting down the existing unserviceable / burnt out HT cable end joints, outdoor type (Heat shrinkable) 11 KV grade suitable for XLPE cables of size 120 Sqmm, 3 core and supply and jointing new HT cable end joint of size 120 Sqmm, 3 core, outdoor type (Heat shrinkable) including testing complete all as specified and directed. Make : RAYCHEM / M-SEAL / DENSON

All as per item No 9 above, but for indoor type. Make : RAYCHEM / M-SEAL / DENSON

All as per item No 9 above, but for 3 core, 95 Sqmm outdoor type. Make : RAYCHEM / M-SEAL / DENSON

All as per item No 9 above, but for indoor type. Make : RAYCHEM / M-SEAL / DENSON

Cutting the burnt out portion of the HT underground XLPE cable of 120 Sq mm 3 core, supply and jointing HT cable straight through joints (Heat shrinkable) 11 KV grade suitable for XLPE cables of size 120 Sqmm, 3 core including testing complete all as specified and directed. Make : RAYCHEM / M-SEAL / DENSON

All as per item No 13 above, but for 3 core, 95 Sqmm Make : RAYCHEM / M-SEAL / DENSON

M&L, locating fault in 11 KV HT underground cable of any sizes with the help of fault locator vehicle organized from TSSPDCL / TSTRANSCO by injecting necessary high voltage to the faulty cable within 12 hours of time from time of reporting of fault all as directed by Engineer in Charge. Note: Quoted rate shall deemed to be included the necessary charges towards liaisoning for arranging fault locating vehicle, transportation of trained technicians and charges payable to Electricity Department.

Disconnecting and taking out LT ACB draw out type of any capacity and any of make from the existing LT panel boards, overhauling the ACBs including cleaning of contacts, removing the carbon deposits, conditioning of spring charge mechanism, taking down all defective acessories, repair / replacement of earth fault release, over current release, trip coil, under voltage coil etc, repair / overhauling of draw out mechanism, greasing and lubricating all moving and fixed parts, removing dusts in the ACBs by means of air blowers including refixing and reconnecting the ACBs in the panel board complete with testing of ACBs for smooth functioning all as specified and directed. Note: (i) Replacement of unserviceable spare parts will be measured and paid seperately under respective items here-in-after. (ii) Any other spare parts which have not covered in the relevent items but are required to make the ACB in functional condition are deemed to be included in the rate quoted by the contractor.

Supply and replacement of under voltage trip device coil with time relay (0-1-3-5 sec) of any ratings suitable for L&T Make ACBs

Supply and replacement of shunt trip voltage coil of any of any ratings suitable for L&T Make ACBs

Supply and replacement of closing voltage coil of any ratings suitable for L&T Make ACBs

Supply and replacement of Spring charging Motors suitable for any capacity suitable for L&T Make ACBs including connecting and testing complete

Supply and replacement of under voltage trip device coil with time relay (0-1-3-5 sec) of any ratings suitable for ABB Make ACBs

Supply and replacement of shunt trip voltage coil of any of any ratings suitable for ABB Make ACBs

Supply and replacement of closing voltage coil of any ratings suitable for ABB Make ACBs

Supply and replacement of Spring charging Motors suitable for any capacity suitable for ABB Make ACBs including connecting and testing complete

Supply and replacement of under voltage trip device coil with time relay (0-1-3-5 sec) of any ratings suitable for SIEMENS Make ACBs

Supply and replacement of shunt trip voltage coil of any of any ratings suitable for SIEMENS Make ACBs

Supply and replacement of closing voltage coil of any ratings suitable for SIEMENS Make ACBs

Supply and replacement of Spring charging Motors suitable for any capacity suitable for SIEMENS Make ACBs including connecting and testing complete

Disconnecting the electrical supply to 132 / 11 KV, 8 MVA transformer, conducting TAN delta and capacitance test EHV Bush by the authroised agency approved by Electrical Inspectorate of Telangana State Electricity Board and submitting the report in triplicate all as specified and directed.

All as per item No. 29 above but for Current Transformer

Supply, erection and testing and commissioning of Current Transformer (oil impregnated) 132 KV class 100-50/1-1-1 CT Ratio, outdoor type oil immersed as per IS 2705 (1992) with insulator electrical connection as per manufacturers instruction complete, CT shall be with rated voltage 145 KV, accuracy class 1.0 for core1, 5P20 for core 2, PS for core 3 at 132 KV side and class 1.0 for core 1, PS 10 for core 2, PS for core 3 (5PO/0.577A for difference) and VA burden should be 15VA for protection all as specified and directed. (MRS) Make : ABB POWER PRODUCT/SIEMENS/CROMPTON GREAVES LTD

Supply, Install, testing and commissioning of 11 KV Potential Transformer (PT) PT-11000/1.732/110/1.732 V, 50 VA / 1.0 in HT VCB panel at different locations of Sub Station / MRS all as specified and directed by Engineer-in-Charge.

Supply, Install, testing and commissioning of 11 KV PT Fuse 3.15 Amps from HT VCB panel at different locations of Sub Station / MRS all as specified and directed by Engineer-in-Charge. Make : Phoenix

Dismantling the existing unserviceable RTCC panel board of 132/11 KV, 8 MVA Power Transformer OLTC, Fabricate, supply and install cubicle type CPRI approved make RTCC panel board, indoor type, totally enclosed, dust & vermin proof (protection class IP 42) front opening with self locking arrangment made out of MS angle iron frame work, MS flat iron and CRCA sheet of 2.0 mm thick as per IS 5039 duly painted with powder coated paint of approved shade after minimum seven tank treatment process. Panel board shall be suitable for 415 volts, 50 Hz, 3 phase 4 wire system with suitable size of PVC insulated, multi stranded copper conductors and all connected acessories required for satisfactory functioning of panel board such as thimbles, glands, bolts, nuts, washers etc, and all other accessories, as required at site complete all as specified and directed at MRS

Supply and fix in repairs of unserviceable Heater 80 watts in VCB panel at various Sub Stations / MRS

Supply and fix in repairs of unserviceable Thermostat suitable for heaters in VCB panel at various Sub Stations / MRS

Dismantling the existing unserviceable ACDB panel board, Fabricate, supply and install cubicle type CPRI approved make ACDB panel board, indoor type, totally enclosed, dust & vermin proof (protection class IP 42) front opening with self locking arrangment made out of MS angle iron frame work, MS flat iron and CRCA sheet of 2.0 mm thick as per IS 5039 duly painted with powder coated paint of approved shade after minimum seven tank treatment process. Panel board shall be suitable for 415 volts, 50 Hz, 3 phase 4 wire system complete with suitable capacity aluminium bus bar and wiring with suitable size of PVC insulated, multi stranded copper conductors and all connected acessories required for satisfactory functioning of panel board such as thimbles, glands, bolts, nuts, washers etc, and all other accessories, as required at site complete all as specified and directed at MRS

Taking out unserviceable analoge / digital type three phase ammeter, square type from HT panel boards, supply and fixing Three phase analog / digital type ammeter, (Class 1.0), square type suiitable for three phase supply with suitable capacity CTs including electric connection and testing complete all as specified and directed at MRS / Sub Stations

Disconnecting the electric supply, removing the HT and LT cable connections and taking out the transformer of capacity upto 1000 KVA from the platform, lifting the transformer with suitable crane, loading into the goods carrier and shifting the transformer to an approved factory (workshop) for reairs and transporting back installation in its original location including connection of HT and LT cable connections all as directed by Engineer-in- Charge. Note : Repairs to tranformer and testing will be measured and paid for separately

M&L for draining out the transfomer oil, removing the inspection cover, lifting the core with suitable crane and removing the winding from the core replacing the unserviceable insulation of LV coil, HV coil and rewinding the unserviceable HV, LV coil turns with new electrolytic copper conductor, drying of core and winding in the oven upto required IR values, assembling the core with new insulation, replace the unserviceable LT, HT bushing washers, oil seal, gaskets of inspection cover with new ones, conduct all testing, commissioning complete upto 1000 KVA Transformer all as directed by Engineer-in-Charge. Note : HT / LT bush, transformer oil, LV, HV coils, inspection cover gasket and testing of transformer will be measured and paid separately under relevant items.

M&L for making LT coil insulation with required gauge of craft paper cotton tape as per specification of old transformer of capacity upto 1000 KVA complete all as directed by Engineer -in-Charge.

M&L for making HT coil insulation with required gauge of craft paper cotton tape as per specification of old transformers capacity complete all as specified and directed by Engineer -in-Charge.

M&L for making HT coil insulation with copper wire of required gauge as per specification of old transformers capacity complete all as specified and directed by Engineer -in-Charge.

M&L for conducting the following tests after repairs of transformers capacity upto 1600 KVA including submitting the test report. (a) I.R values of HV to LV, HV to Earth and LV to Earth. (b) winding resistance. (c) Ratio test (d) No-load test (e) Short circuit test (f) Dielectric strength of oil (g) Transfomer tap switch positions Note: contractor shall arrange all measuring instuments / equipment for testing of transformer.

Supply and replace of unserviceable transformer oil conforming to IS: 335 (1993), dielectric strength not less than 60 KV at 2.5 mm gap in various capacities distribution transformers installed at various indoor and outdoor sub stations complete all as specified and directed. Make: Power oil / SERVO / Castrol / Shell.

Dehydration of transformer oil in distribution transformers with ultra high vaccum filtration machine to obtain the dielectric strength of 60 KV at 2.5 mm gap complete all as specified and directed.

M&L for painting to body of distrubution transformers of upto 1000 KVA capacity with one coat of synthetic enamel Grey paint using spray gun machine after removing all dust and rust and two coats of oil resistant paint internally complete all as directed by Engineer-in-charge. Make of paint : Shalimar /Asian/Berger

Supply only copper earth strip 50 x 6 mm for test points in MRS Switch Yard all as specified and directed by Engineer-in-Charge

Excavation and closing of holes for copper test point of size 600 x 600 x 600 in depth in soft / hard soil complete all as specified and directed.

Labour work to make copper earth test points in MRS yard including bending, shaping, fixing the copper strip above and below ground level all as specified and directed by Engineer-in-Charge

Labour work for fixing the copper earth strip below ground level and above ground level upto 16 inches with nuts and bolts etc all as specified and directed by Engineer-in-Charge in MRS Switch Yard.

M&L for General Servicing and testing of 132 KV, 1600 Amps SF6 Gas circuit breaker of any make and rated voltage 145 KV, rated short circuit current at 40 KA, 50 Hz, 3 Pole outdoor type spring operated mechanism complete all as specified and directed. Notes :- (i) Servicing should be carried out through Authorised service center and after completion of job should submit the service report to derpartment. (ii) Any consumeable and minor spares are required for servicing deemed to be included in quoted rate.

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