REPAIRS TO HT OVERHEAD LINES, TRANSFORMERS AND DEHYDRATION OF TRANSFORMER OIL AND CERTAIN REPAIRS TO 132/11 KV SWITCH YARD UNDER GE I RND RCI HYDERABAD

Amount

M&L, complete removal of existing paint and applying painting to HT 4 pole structure including all connected MS structures with two coats of aluminium paint over a coat of red oxide primer, marking the pole in white capital letters including painting the pole with black bituminous paint from ground level to a height of 1.5 mtr and marking two Nos alternative yellow strips of 300 mm high on black painted portion of the pole with yellow synthetic enamel paint at a height of 0.3 mtr and 0.9 mtr from ground level complete all as specified and directed. Make of paint : Asian (Apcolite)/Berger (Luxol)/Nerolac (Goodlass-Nerolac)

All as per item No.01 above but HT 2 pole structure.

M&L, complete removal of existing paint and applying painting to HT MS electric pole 11 mtr long and connected cross arms, pipe etc., with two coats of aluminium paint over a coat of red oxide primer including marking the pole in white synthetic enamel paint with capital letters and painting the pole with black bituminous paint from ground level to a height of 1.5 mtr and making two Nos yellow radium strips of 100 mm high at a height of 1.2 mtr and 1.4 mtr from ground level complete all as specified and directed.

Taking out the sample of transformer oil from distrubution transformer and conducting the Dielectric Strength(BDV) test from power grid lab and submit the report complete all as specified and directed.

Supply, installation, testing and commissioning of horizontally operated, triple pole, outdoor gang operated air break switch (GOD), 11000 volt grade, 200 amp current rating consisting of moving and fixed jaws, nine insulators (3 Nos insulators in each phase), mounted over MS channel frame, fuse carriers and fuse elements, operating mechanism suitable for operating from ground, made out of GI tubing 25 mm dia, medium grade with operatiing handle and locking arrangement, aluminium jumpers of suitable size etc., complete all as specified and directed. Make : Jaipuria Brothers/Oblum/JSI

Dismantling and taking down the unserviceable gang operated switch from HT 2 pole/ 4 pole structures after disconnecting the electric connection, jumpering, unscrewing bolts and nuts etc. complete all as directed.

Labour only for straightening of HT over head line (3 conductors) of ACSR conductor of any size and span by disconnecting and removing from insulators including providing necessary binding wire and jumpering after proper stringing all as directed. Note: Length of each Span of line is between 30 to 45 Metres

S&F, in repairs lightning arresters (set of three) expulsion type, complete with all fittings, transmission class, discharge capacity 65 Kilo amps, 11000 volt grade on 2 pole/ 4 pole structures with suitable arrangement complete all as directed. Make: Alstom/OBLUM / CG/ Areva/Lamco/BHEL

S&F, in repairs disc type insulator, porcelain, vitreous, 145 mm high and 255 mm dia ball and socket type, white, brown or green, single disc assembly for tension with tension clamps for conductors, working pressure 11000 volts grade complete all as specified and directed. Make : Jaipuria Brothers/Oblum/JSI/LAMCO

S&F, in repairs pin type insulator, porcelain, vitreous, white, brown or green, including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia , working pressure 11000 volts grade complete all as specified and directed. Make : Jaipuria Brothers/Oblum/JSI/LAMCO

Disconnecting and taking out defective 11 KV air break switch assembly from HT 2 pole/ 4 pole structures, scrubbing and cleaning dust/ carbon deposits from all GI/copper moving and fixed parts with sand papers/clothes and applying greasing/lubricating the moving/ fixed linkage, necessary welding to MS structure/ GI tubings if required, refixing the same in position with new bolts, nuts, washers of suitable size, replacement of defective moving and fixed contacts for proper operation of GOD, including testing and commissioning etc., complete all as specified and directed. Notes : (i) Replacement of unserviceable spare parts such as fixed and moving contacts and insulators will be measured and paid for seperately. (ii) The cost of any other spare parts which are not covered in Note No (i) above but are required to make the GOD serviceable condition is deemed to be included in the quoted rate.

S&F, (female) contact suitable for 11 KV, 200 amp horizontally operated gang operated device all as directed.

S&F, moving (male) contact suitable for 11 KV, 200 amp horizontally operated gang operated device all as directed.

S&F, in repairs post top porcelain insulator vitreous brown, GI clamps, nuts, bolts etc suitable for 11000 volts grade working pressure including disconnecting the electric supply complete all as specified and directed. Make : OBLUM/JSI/Jaipuria Bros

Disconnecting the electric supply to the transformer 63 KVA to 160 KVA capacity, opening the transformer by unscrewing bolts from the top cover of the transformer, draining out of transformer oil into a container upto required level for arresting the leakage in the transformer, taking down of unserviceable HV and LV bushes from the transformer if necessary, replacement of top cover gasket, HV and LV side bushes gasket, buchholz relay gasket, bolts, nuts and washers with new one, soldering work if necessary while fixing the bushes and re-fixng the same including testing the transformer after repairs complete all as specified and directed. Note: (i) HT /LT metal studs, HT/LT bushes and gaskets will be measured and paid seperately under supply only items. (ii) Nuts, bolts, washers, petrolium jelly, grease, CTC required are deemed to be included in the quoted rate.

All as per item No. 15 above but transformer 315 to 630 KVA capacity

All as per item No. 15 above but transformer 750 to 1500 KVA capacity

Supply only HT porcelain bush suitable for transformers upto 160 KVA capacity all as directed.

All as per item No.18 above but suitable for transformers 315 to 500 KVA capacity.

All as per item No.18 above but suitable for transformers 630 to 1500 KVA capacity.

Supply only LT porcelain bush suitable for transformers 500 KVA to 1250 KVA capacity all as specified and directed.

Supply only LT rod/studs with brass nuts and washers size and shape as per existing one suitable for transformer upto 160 KVA capacity all as directed.

All as per item No.22 above but suitable for transformer 315 to 500 KVA capacity.

All as per item No.22 above but suitable for transformer 630 to 1500 KVA capacity.

Supply only set of top cover gasket for transformers upto 160 KVA capacity all as directed.

All as per item No. 25 above but for transformers 315 to 500 KVA capacity.

All as per item No. 25 above but for transformers 630 to 1500 KVA capacity6.

Supply only oil temprature gauge for transformer 500/630/750/1000 KVA capacity all as directed by Engineer-in-Charge.

Opening the LT bus duct from LT side of 11 KV/0.433 KV transformer to incomer of LT panel board, cleaning the carbon deposits on the busbar, replacement of bolts/nuts, body insulators including testing complete all as directed.

Opening of LT panel board, disconnecting and removing of the burnt out cable end terminations, cutting and reterminating of the cable end portions with proper size of lugs and decarbonising of panel busbar and cleaning with CTC, replacing of cable glands, connecting back cable end termination properly, opening of the busbar chambers, cutting removing of the cable connections, reterminating with proper size of lugs, tightening of the bus bar nuts, bolts including wrapping of the busbar with colour codes, checking of all switches, MCCBs, all isolators, tightening of the loose connections replacing of burnt out fuse, cut out fuses with new ones complete all as directed by Engineer-in-Charge.

Disconnecting the electric supply, removing the HT and LT cable connections and taking out the transformer of capacity 63 KVA to 1250 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 repairs and transporting back for 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 separately.

M&L, 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 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.

Supply only 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.

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

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

M&L, conducting the following tests after carrying out repairs of transformers 315 KVA to 750 KVA capacity including submitting the test report all as directed. (i) IR 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 without extra cost.

Taking down the defective air breathers from the transformers, supply and fix new breathers suitable for step down distribution transformers ranging from 63 to 160 KVA capacity of any make including filling of new silica gel in breathers complete all as specified and directed.

Taking down the defective air breathers from the transformers, supply and fix new breathers suitable for step down distribution transformers ranging from 315 to 500 KVA capacity of any make including supply and filling of new silica gel in breathers complete all as specified and directed.

Taking down the defective air breathers from the transformers, supply and fix new breathers suitable for step down distribution transformers ranging from 630 to 1500 KVA capacity of any make including supply and filling of new silica gel in breathers complete all as specified and directed.

Supply, install and connect panel mounting type battery Charger with transformer diode operated (not PCB) 24 Volts, 30 Amps including removing the unserviceable all as specified and directed. Make : ELAK/Servo

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 of power and distribution transformers installed at various indoor and outdoor substations with ultra high vacuum filtration machine to obtain the dielectric strength of 60 KV at 2.5 mm gap including submitting necessary test report complete all as specified and directed.

Taking out the vacuum circuit breaker of 11 KV Voltage rating 400/630/800/1250 Amps, 3 phase, 50 cycles from 11 KV HT panel board for overhauling the VCB, carrying out visual check of panel, inspect, clean and tightening of bolts of bus bar chamber, cleaning and inspecting CT & PT, chekcing cable tightness, control circuit and sericing of VCB as the folowing:-

(a) Drawout mechanism

(b) Driving mechanism

(c) Cleaning of insulated parts

(d) Functional testing of VCB

(e) Measuring of IR values and contact resistance, checking of inner lock within panel board, checking of indicating lamps and zero error of all accessories, cleaning dusting, physically checking for any damages tightening of bolts, nuts, greasing and lubricating ( by SIEMENS grease) of all moving parts, lubricating spring charge machanism by suitable oil, checking and tightening of control wiring for its normal functioning, applying petrolium jelly for top and bottom arm, female contacts and jaw contacts, checking of ON/OFF mechanism mechanically by removing control plug under test condition and

Notes : (i) Replaceable parts will be measured and paid separately under supply only items and the labour elements for taking down and fixing shall be deemed to be included in the quoted rate. (ii) Overhauling should be done through authorised OEM or channel patner of OEM or State Government Approved License holder. (VCBs of make Schneider Electric -15 Nos, Siemens - 09 Nos, Crompton Greaves - 14 Nos, Areva - 7 Nos, Kirloskar - 13 Nos and Alstom - 12 Nos)

Testing and calibration of 11KV HT VCB panel protection relays over current/ earth fault, tripping and closing circuits by primary and secondary injection method for their optimal tripping and closing performance including resetting of the time whenever required including submission of test report in duplicate complete all as directed. Note : Measuring instrument required for calibration and testing shall be arranged by the contractor without extra cost. Calibration should be done by OEM/SEB authorised service engineer.

Supply only LED type indicator lamps of red/yellow/blue/green/Amber with bulb all as specified and directed. Make : C&S/ L&T/AE

Supply only analog type ammeter of 0 to 400 Amps capacity, square type of size 96x96mm with CTs of suitable ratio all as specified and directed. Make : AE/MECO/L&T

Supply only TNC(Trip neutral close) switch for HT VCB all as specified and directed. Make: Seimens/AE/GE

Supply only panel type strip heater 80W capacity all as specified and directed. Make : Siemens/AE/GE

Supply only 11KV, 400 Amps HT VCB Vacuum interrupter Bottles all as directed. Make : Schneider/ ABB/ ALSTOM/ CG/ Kirlosker/ Siemens/ Areva

Supply only 11KV, 630 Amps HT VCB Vacuum interrupter Bottles all as directed. Make : Schneider/ ABB/ ALSTOM/ CG/ Kirlosker/ Siemens/ Areva

Supply only 11KV, 800 Amps HT VCB Vacuum interrupter Bottles all as directed. Make : Schneider/ ABB/ ALSTOM/ CG/ Kirlosker/ Siemens/ Areva

Supply only 11KV HT VCB panel body insulators of existing size all as specified and direced

Removing the unserviceable auxillary power supply systems of 110 volts and Supply,testing and commissioning of Auxillary power supply system of 110 Volts for protection of VCB panel including synthetic rubber chamber complete by using a set of 55 Nos maintenance free lead acid batteries of 2 volts 80 AH capacity each complete all all as specified and directed. Make of Battery : AMARARAJA/EXIDE

M&L, overhauling of battery charger of battery banks, 110V DC control supply including checking and repair of float mechanism, booster mechanism, replacement of burnt PCBs, rectifiers, contacts (of any type and rating), control wiring with existing rating of copper cable, replacement of lugs, indicators, switches etc including testing the battery charger after repair complete all as specified and directed.

Taking out defective FRP bushing 11 KV from the panel and refixing the same after reconditioning with FRP coating upto insulation level complete all as directed

Taking out unserviceable FRP bushing 11 KV from the panel, supply and fix new FRP bushing complete all as directed

Disconnecting the HT 11 KV supply to HT VCB, removing the spring charge gear, supply and fix spring charge gear and reconnecting to power supply including testing complete all as specified and directed. Make : CG or equivalent as approved by GE

Supply and lay electrical insulation matting as per IS:15652/2006, 2.5 mm thick of size 1M X 2M HT ISI marked including removing the unserviceable one complete all as specified and directed. Make : Premier or equivalent as approved by GE

Testing and calibration of 132KV EHT SF6 Circuit breaker panel protection relays of over current/ earth fault, tripping and closing circuits by primary and secondary injection method for their optimal tripping and closing performance including resetting of the time whenever required including submission of test report by authroised license holder of State Electricity Board in duplicate complete all as directed. Note : Measuring instrument required for calibration and testing has to be supplied by the contractor without extra cost.

S&F, trip circuit supevision relay operated through 110Volts DC control supply complete all as specified and directed. Make : L&T, model : TCSotnX or techno-commercially equivalent model in ABB/GE/Schneider.

S&F, 3 Phase over current and earth fault protection relay with High Set suitable for control supply of 110V complete all as specified and directed. Make : L&T, model : MC61C or techno-commercially equivalent model in ABB/GE/Schneider.

Disconnecting and taking out defective 132 KV, 1600 Amps Air break switch isolator (Horizontal type), triple pole with earth (Two break per pole) assembly from EHT pole structures, scrubbing and cleaning dust/ carbon deposits from all GI/copper moving and fixed parts with sand papers/clothe and applying greasing/lubricating the moving/ fixed linkage, necessary welding to MS structure/ Alloy Aluminium 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 Air break Switch isolator, complete including testing and commissioning etc. all as specified and directed. Notes : (i) Replacement of unserviceable spare parts such as fixed and movable contacts, aluminium jumpers, all types of insulators, MS structures and Alloy Aluminium tubings will be measured and paid seperately. (ii) petrolium jelly, grease, CTC, nuts and bolts required are deemed to be included in the quoted rate.

M&L, overhauling of 1600 Amps SF6 circuit breaker of 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 carriedout through OEM only and after completion of job should submit the service report to derpartment. (ii) Any consumeable and spares are required for overhauling deemed to be included in quoted rate.

Disconnecting the electrical supply to 132/11 KV, 8 MVA transformer, conduct TAN, delta and capacitance test EHV bush by the approved engineer by state electricity board and submitting the report in triplicate all as specified and directed.

All as per item No.65 above but current transformer

M&L, conducting of Restricted Earth Fault Protection for 132/11 KV, 8.0 MVA Transformer by connecting the neutral CT Cable to Relay Control Panel and conducting stability test on Transformer confirming the correct function of the relay into operation complete all as specified and directed.

Taking out the sample of transformer oil from 132/11 KV 8 MVA power transformer and conducting the sludge content and acidity test from power grid lab and submit the report all as specified and directed.

M&L, Glow sign board (Bakelite) details of sub station equipment of letters size 100mm on flex (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.

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

M/S GDR CONSTRUCTIONS

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