REPAIR AND REPLACEMENT OF SPARES TO 11 KV SWITCH YARDS DEHYDRATION OF TRANSFORMERS CERTAIN REPAIRS TO 11 433 KV SUB STATIONS AND 132/11 KV MAIN RECEIVING STATION INCLUDING REPLACEMENT OF FAULTY HT CABLES AT RCI HYDERABAD UNDER GE I RND RCI HYDERABAD

Amount

Supplying, laying, jointing, testing and commissioning 11000 volts grade, Earthed, HT XLPE insulated of size 3 core 120 Sqmm,, 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 as directed.

NOTE : Earthwork Excavation, sand cushioning, GI pipe for cable protection and cable covers will be measured and paid separately under relevant items of this BOQ.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m depth and getting out in soft/loose soil complete all as specified and as 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 complete all as specified and as directed. NOTE: Punned thickness will only be measured for the purpose of payment.

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

Supply and lay unreinforced pre-cast concrete cable cover class HV, type-I, flat size 300X180mmX40mm complete all as specified and as directed.

Cutting of existing bituminious/PCC road or flooring/plinth protection, for laying of GI pipe in road intersection for passing of LT 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 specified and as directed.

Supply and lay 150mm dia GI pipe light grade, laid in trenches, road crossing or fixed to walls/poles 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 as 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

Disconnecting and cutting down the existing unserviceable /burnt out HT cable end joints, indoor type (Heat shrinkable) 11kV 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, indoor type (Heat shrinkable) including testing complete all as specified and directed. Make : RAYCHEM/M-SEAL

Disconnecting and cutting down the existing unserviceable /burnt out HT cable end joints, outdoor type (Heat shrinkable) 11kV grade suitable for XLPE cables of size 95 Sqmm, 3 core and supply and jointing new HT cable end joint of size 95 Sqmm, 3 core, outdoor type (Heat shrinkable) including testing complete all as specified and directed. Make : M-SEAL/Raychem

Disconnecting and cutting down the existing unserviceable /burnt out HT cable end joints, indoor type (Heat shrinkable) 11kV grade suitable for XLPE cables of size 95 Sqmm, 3 core and supply and jointing new HT cable end joint of size 95 Sqmm, 3 core, indoor type (Heat shrinkable) including testing complete all as specified and directed. Make : M-SEAL/Raychem

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

Cutting the burnt out portion of the HT underground XLPE cable of 95 Sq mm 3 core, supply and jointing HT cable straight through joints (Heat shrinkable) 11 KV grade suitable for XLPE cables of size 95 Sqmm, 3 core including testing complete all as specified and directed. Make : RAYCHEM/M-SEAL

M&L for locating fault in 11 KV HT underground cable of any size 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 complete all as specified and directed. NOTE: Quoted rate is deemed to include for 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 630/800/1000 Amps capacity of make ABB/Merlin Gerinn/CROMPTON GREAVES/SIEMENS/L&T/GE/ C&S from the existing LT panel boards, overhauling the ACBs including cleaning of contacts, removing 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 and testing of ACBs for smooth functioning complete all as specified and as directed. NOTES: (i) Replacement of unserviceable spare parts will be measured and paid separately under relevant items of this BOQ as SUPPLY ONLY. (ii) Any other spare parts which are not covered in the relevant items but are required to make the ACB fully functional condition are deemed to be included in the unit rate quoted by the contractor.

Disconnecting and taking out LT ACB, draw out type of 1250/1600/2000/2500 Amps capacity of make ABB/Merlin Gerinn/CROMPTON GREAVES/SIEMENS/L&T/GE/ C&S from the existing LT panel boards, overhauling the ACBs including cleaning of contacts, removing 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 and testing of ACBs for smooth functioning complete all as specified and as directed. NOTES: (i) Replacement of unserviceable spare parts will be measured and paid separately under relevant items of this BOQ as SUPPLY ONLY. (ii) Any other spare parts which are not covered in the relevant items but are required to make the ACB fully functional condition are deemed to be included in the unit rate quoted by the contractor.

Supply and replacement of shunt trip coil of any of the following ratings suitable for ACBs of capacities 630 amp to 2500 amp:- (a) 24-30 V DC (b) 110V AC/DC (c) 240V AC/DC (d) 415 V AC.

Supply and replacement of closing coil of any of the following ratings suitable for ACBs of capacities 630 amp to 2500 amp:- (a) 24-30 V DC (b) 110V AC/DC (c) 240V AC/DC (d) 415 V AC.

Supply and replacement of under voltage trip device with time relay (0-1-3-5 sec) of any of the following ratings suitable for ACBs of capacities 630 amp to 2500 amp:- (a) 24-30 V DC (b) 110V AC (c) 415 V AC (d) 240 V AC .

Supply and replacement of ON/OFF buttons for ACBs of make GE/SIEMENS/L&T/ Crompton Greaves/ABB/C&S of rating 630 amp to 2500 amp.

Supply and replacement of spring charge induction switch for ACBs of make GE/SIEMENS/L&T/ Crompton Greaves/ABB/C&S of rating 630 amp to 2500 amp.

Supply and replacement of trip induction switch in ACBs of make GE/SIEMENS/L&T/ Crompton Greaves/ABB/C&S of rating 630 amp to 2500 amp.

Supply and replacement of position induction switch in ACBs of make GE/SIEMENS/L&T/ Crompton Greaves/ ABB/ C&S of capacities 630 amp to 2500 amp.

Supply and replacement of draw out position lock in ACBs of make GE/SIEMENS/L&T/ Crompton Greaves/ABB /C&S of capacities 1000 amp to 2000 amp.

Supply and replacement of charging motors 110 Volt AC/DC or 220 volt AC/DC suitable for 630 to 1000 amp ACBs of make L&T/ABB/C&S/GE/Seimens including connecting and testing complete

Supply and fix 6 way secondary isolating contacts suitable for ACBs of capacity 630- 2000 amp of make ABB/GE/Seimens/L&T

Supply and fix moving arcing contacts suitable for ACBs of capacity 800- 1600 amp of make ABB/GE/Seimens/L&T

Supply and fix auxiliary contacts (5 NO + 5 NC) suitable for ACBs of capacity 800- 1600 amp of make ABB/GE/Seimens/L&T

Supply and replacement of safety shutter assembly suitable for ACBs of make ABB/GE/Seimens/L&T of capacities 630 amp to 1600 amp.

Disconnecting the electric supply, removing the HT and LT cable connections and taking out the transformer of capacity 630 KVA/ 750 KVA from the platform,lifting the transformer with suitable crane, loading into the goods carrier and shifting the transformer to anapproved 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 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 including painting of transformer tank externally with two coats of enamel paint and internally with two coats oil resistant paint completely 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/HT coil with insulation copper wire of required gauge craft paper cotton tape HT/LT insulation as per specification of old transformer complete all as directed by engineer -in-Charge.

Removal of unserviceable silica gel and supply and fill silica gel in breathers of transformers complete all as directed by Engineer-in-Charge.

Supply and replace 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.

Material and labour charges for fixing of oil seal and gasket and oven charges to obtain the ambient insulation value

Supply only inspection cover gasket, radiators gasket, HT Cable box gasket and LT Cable box gasket etc complete all gasket of transformer pf 630 KVA/ 750 KVA of grade SRC RC 70C all as specified and directed.

M&L for conducting the following tests after repairs of transformers of 630 KVA/750 KVA including submitting the test report. (i) I.R values of HV to LV, HV to Earth and LV to Earth. (ii) winding resistance. (iii) Ratio test (iv) No-load test (v) Short circuit test (vi) Dielectric strength of oil (vii) Transfomer tap switch positions Note: contractor shall arrange all measuring instuments / equipment for testing of transformer.

Supply, erection and testing and commissioning of Potential Transformer 11 KV PT-11000/v3/110/v3 V, 50 VA/1.0 as per manufacturers instruction complete all as specified and directed.

Material and labour for making copper earth test points in MRS yard including excavation, bending, shaping, fixing the copper strip above and below ground level with nuts and bolts etc all as specified and directed by Engineer-in-Charge

Material for test point as copper earth strip 32 x 6 mm buried in ground for making test points for copper earthing complete all as specified in MRS yard as directed.

M&L for disconnection of conductor / cable, unscrewing of bolts, nuts etc, taking out defective 11 KV air break switch assembly from HT 2 pole / 4 pole structures, scrubbing dust / carbon from all GI / copper moving and fixed parts, cleaning the same with sand papers / clothes, greasing / lubricating the moving / fixed linkage, necessary welding to MS structure / GI tubings, refixing the same in position after supply and replacement of unserviceable bolts, nuts, washers of suitable size, replacement of defective moving and fixed contacts for proper operation of GOD, replace complete including testing and commissioning etc. all as specified and directed.

Note: (i) Replacement of unserviceable spare parts such as fixed and movable contacts, aluminium jumpers, all types of insulators , MS structures and GI tubings will be measured and paid seperately under respective itrems. (ii) Any other spare parts which have not covered in Note No (i) above but are required to make the GOD in srviceable condition are deemed to be included in the rate quoted by the contractor.

Supply and fixing (female) contact suitable for 11 KV , 200 Amps horizontally operated gang operated device.

Supply and fixing moving (male) contact suitable for 11 KV , 200 Amps horizontally operated gang operated device.

M&L for overhauling of 1600 Amps SF6 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) Overhauling 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 overhauling deemed to be included in quoted rate.

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. 46 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 and topping up 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 of various capacities power / distribution transformers installed at various indoor and outdoor 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.

Taking out the sample of transformer oil from 132/11 KV 8 MVA power transformer and conducting the DGA (Dissolved Gas Analysis), from power grid lab and submit the report complete all as specified and directed.

Dismantling unserviceable / burnt electric cables connected with PV modules of Solar power plant, supply and replacement of 2 core 16 Sqmm multistarnded copper conductor, 1100 Volt grade, PVC insulated, unsheathed, (flexible), ISI marked, including necessary electric connections and testing complete all as specified and directed. Make : Havells / Plaza / Finolex / Legrand.

Material, labour and testing for overhauling of 132 KV SF6 1600 Amps Gas circuit breaker including replacement of unserviceable accessories completes all as specified and directed. The list of replacement of accessories as follows:-

vvcenterprises

M/S GDR CONSTRUCTIONS

Shreshta Associates

hari enterprises

SHRI GANESH ENTERPRISES

BHAGYARAM ENTERPRISES

Brite electricals