REPAIR/MAINT OF RMUS DISTRIBUTION TRANSFORMERS, EXTERNAL ELECTRICAL DISTRIBUTION SYSTEM INCLUDING REPAIR/CALIBRATION OF RELAYS METERS AND OTHER ALLIED WORKS AT INS EKSILA UNDER AGE E/M NO.II OF GE (UTILITY-I) VISAKHAPATNAM

Amount

Clearing of bushes/small plants up to root level around and surroundings areas E/M installations (i.e. Two Pole/ Four structures, outdoor-substation yards,infront of indoor sub stations & Misc E/M installations etc) including surface dressing n.exc 15 cm deep and removing debris to a distance n.exc 50m complete all as directed

Supply and lay Graded coarse aggregate of size 40 mm dia size in outdoor sub-station yards all as directed

Supply and lay Graded coarse aggregate of size 20 mm dia size in outdoor sub-station yards all as directed

Supply and lay stone dust in layers in outdoor sub-station yard all as directed.

M&L for replacement of damaged space heater in HT VCB 11 KV with new one suitable to operate on 220 Volts AC supply complete with necessary wiring and control cable with toggle switch and all as directed by Engr-in-charge.

Digital Temperature Indicator along with suitable thermostat.

Dismantling old defective Air break switch and supply,install,test and commissioning HT voltage 36 KV working voltage 33 KV out door type double break rotating gang operated air break switch (with 9 insulators and earth switch) triple pole Mechanically operated mounting horizontally on isolators and steel frame,opertated with GI tubing of 40 mm dia.medium grade of suitable lenth including provide handle,clamp,bolts,nuts etc,with locking arrangements,worked from ground level of cyrrent rating400 A,rated shot time current 25 KA for 3 seconds confirming to IS 1818-1972 including hot dip galvanised coating of all ferrous parts other than operating mechanisum box,all as per standard practice MAKE:- Jayshree/Jaipuria/Atlas

M&L for dismantling IED of any type/make from 11 KV HT panel cleaning the contacts,IED configuration,calibration & testing of all the measuring & protection devises viz, CTS,Relays and meters at site.Testing of all the tip functions of the relays after final current settings by simulating by fault current by CT secondary injection test set,checking of current transformer,rectification of defects in control wiring for proper tripping of CB during actual system fault conduction through relay & tripping coil. Adjustment/setting to plug and time multiplier settings of IED to achieve the descrimination in tripping,tune/synchronies upstream breaker relay settings installation of realy,testing & commissioning etc complete all as directed by the Engineer-in-Charge.

M&L for collecting necessary required Data & peak load details from IED of any type/Make from 33 KV/11 KV HT panel,Transformer full load details during peak hours.Relay setting calculations & CO-Ordination study. Unit protection setting of transformers feeder wise settings has to be furnished & report with firm recommendations to be submitted down stream power distribution (complete 33 KV & 11 KV) over all co-ordinations of time need to be achieved. Adjustment/setting to be plug and time multiplier settings of IED complete all as directed by the Engineer-in-Charge.

Note: The Contractor has to arrange necessary testing Kits, testing equipments, tools etc and shall also submit detailed test reports, panel wise, duly spiral bound. Rental rates for the testing/calibration kits & connected equipments are deemed to be included in the quoted rate. Testing & tuning shall be carried out in the presence of representative of the Department, to the satisfaction of the Department.

Decarborizing/cleaning complete 11kV HT Bus bar chamber with electrical connections, complete bus bar from the bus bar chamber , Cleaning with CTC and ensure proper decarburizing up to proper megger value , refixing the same after applying Backtol Red solution to the bus bar insulator,applying backtol red paint for both Bus bar spouts,Circuit spouts & checking all the connections , tightening the nuts , bolts complete incl replacement of defective rusted bolts & nuts all as specified and directed.

Decarborizing/cleaning complete 33 KV VCB's including servicing of all mechanical gear wheels,moving parts and checking all tripping mechanism,all electrical connections complete cleaning with petrol and CRC 226 Spray solution and ensure proper decarbonism,rest the same complete all as specified and directed by thr Engr-in-Charge.

Supply, lay, connect, test and commission multi core copper conductor cables, XLPE insulated, LT 1100 volts grade GI strip/wire armoured in ducts/on structures including clamps, terminations on both ends with glands and connecting up to the equipment all as specified and of following sizes complete all as specified and directed:- MAKE:- Polycab/KEC International/KEI

4 Core 2.5 sqmm

5 core 4 sqmm

14 core 2.5 sqmm

19 core 2.5 sqmm

S&F insulated synthetic mat nominal 3.0 mm thick conforming to IS: 15652-2006,ISI marked suitable upto 33 KV colour Blue standard roll from from 5m/10m to minimum joints and wedth of each mat shall be 1.0 Mt complete all as specified and directed by Engr-in-Charge ( MAKE:-PREMIERPOLYFILM Ltd/SUNTEX INSULATICA/DUNLOP).

M/L for repairing & servicing of 33KV gang operated air break isolator & earth switch comprising the following: a) Cleaning of contact for dust, oxidation & pitting with CTC. b) Cleaning of all insulators with CTC and observing any cracks and carbon deposits/contents. c) Repairing, adjusting the rotating arms for perfect operation including lubrication with petroleum jelly. d) Repairing/replacement of tension spring in fixed contacts. e) Lubricating of all moving parts for smooth operation. f) Checking of auxiliary contacts and their calibration g) Applying petroleum jelly to all electrical contacts/moving contacts. h) Tightening of all electrical and mechanical connections.

Note for Item No 14: The rate quoted deemed to be inclusive of Consumables like nuts & bolts, washers, petroleum jelly, CTC etc & T&P etc complete and necessary safety measures for working in 33 KV yard.

Disconnect and taking out the Numeric/ Microprocessor based Differential relay of any type/ of any Make from 33 KV HT panel, cleaning the contacts, calibrating the relay by conducting secondary injection tests, checking of current transformer, rectification of defects in control wiring for proper tripping of circuit breakers through CTs and relay and tripping coils, adjustment/setting to plug and time multiplier settings of the relay to achieve the discrimination in tripping, tune/synchronise upstream breaker relay settings, re-installation of relay, testing & commissioning etc complete all as specified and as directed.

Note: The Contractor has to arrange necessary testing Kits, testing equipments, tools etc and shall also submit detailed test reports, panel wise, duly spiral bound. Rental rates for the testing/calibration kits & connected equipments are deemed to be included in the quoted rate. Testing & tuning shall be carried out in the presence of representative of the Department, to the satisfaction of the Department.

S&F in repair Master Trip Relay suitable for 11 KV HT panel for protection system . Make: ABB/ Siemens/Areva/Easun/CG

S&F in repair DC Supervision Relay suitable for 11 KV HT panel for protection system . Make: ABB/ Siemens/Areva/Easun/CG

S&F in repair Auxiliary Relay suitable for 11 KV HT panel for protection system . Make: ABB/ Siemens/Areva/Easun/CG

Taking down HT switch gear (Vacuum circuit breaker ) of capacity 11 KV 250/350 MVA comprising of following repairs, overhauling, servicing and refixing the same after repairs/ overhauling:

(a) Tripping off the breaker, lowering the breaker with raising/lowering handle and pulling out the breaker complete from the panel along with the trolley for servicing/inspection/overhauling

(b) Servicing/Inspecting/checking of automatic safety shutter operation for serviceability and replacement of spares if required.

(b) Servicing/Inspecting/checking of circuit spout and circuit spout connections for RYB phases and replacement of spares if required.

(c) Dismantling and checking of cross bar assembly, fixed contacts and current carrying parts of the breaker, trolley, insulated assembly and checking lamination with clamps, epoxy spout, isolator assembly etc.

(d) Setting, reassembling, cleaning, adjustment of fixed contacts, main contact, arcing contacts and chamber baffle pot assembly, moving contact for proper setting of auxiliary contacts operating mechanism.

(e) Servicing/Inspecting/checking of secondary sockets/busbar earthing plugs/earthing sockets and replacement of spares if required.

(f) Checking, setting and adjustment of lowering and raising operation of the breaker trolley.

(g) Lubrication and greasing of all moving parts of the trolley, stopper bolt for proper operating and closing of shutter gear, isolation resistance of trolley of with vacuum interrupter assembly.

h) The inspection of HT switch gear shall involve:- (i) Inspection of truck & hoist assembly. (ii) Inspection of tank assembly & barriers. (iii) Inspection of assembly & components of solenoid assembly. (iv) Inspection of assembly & components of dependent mechanism. (v) Inspection of assembly & components of spring box mechanism. (vi) Inspection of motor mechanism spring charge assembly (vii) Inspection of assembly of trip unit & related components

Notes: (i) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of VCB panels with approved colour all as per existing etc. to put in to the VCBs and panels in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge. (ii) Major spares like Breaker bushings, vaccum interrupter assly, busbar spout, busbar spout connections, circuit spout/circuit spout connections/buffer fixed contacts, moving contacts, tank assly/barriers, solenoid spares, dependent/spring mechanism/ motor mechanism, trip unit etc will be measured and paid separately under relevant items of Schedule 'A'. However the rate quoted shall be deemed to include for any other minor spares require replacement.(ii) the servicing shall be carried out by Auhtorised service centre as approved by GE

Supply only the following spares suitable for 250 MVA to 450 MVA HT switch gear VCBs and 11 KV HT panel repair work under relevant Schedule

Supply only 1.5 sqmm flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

Supply only 2.5 sqmm flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

LED Indication Lamps

LED type push button actuators

Shunt trip coil 110 V DC/220 V DC

CTs epoxy cast wound primary CTs with minimum primary current 60 to 400 A, single/ double ratio, double core (Protection core-5P10 & Metering core- Class 1.0), 25 KA for 1 sec of 15 VA Burden.

Breaker control switch

Breaker bushing contact

Vacuum interrupter assembly

Busbar Spout

Circuit spout

Control circuit fuses 2 A to 63 A

HRC fuse (PT HT side)

PT plug contact

Spring charging motor with gear assembly. Make: Bosch

Ammeter 240 deg 144 sq mm. Make: AE/ MECO/ Schneider /L&T/HPL (SOCOMEC).

Voltmeter 240 deg 144 sq mm . Make: AE/ MECO/ Schneider/L&T/HPL (SOCOMEC).

Multifunction meter, Digital type (Displaying A, V, PF, Hz, KVA, KW, KVAR, KWh, KVARh etc.) Class 0.5 with RS485 port for communication in Modbus protocol. Make : L&T, Conzerve, HPL (SOCOMEC).

Cast Resin Three phase Potential Transformer 11KV/√3/110V/√3,100VA , Cl 1.0/0.5 with desired capacity PT Fuses

M/L for repairs/servicing of 36 KV outdoor VCBs of (Areva)Schneider make with mechanism SPMX-500 FORMAM comprising of the following:- a) Cleaning of vacuum interrupter limbs for dust, oxidising and decarbonising with CTC. b) Repair/servicing of spring loaded operating mechanism c) Repair/servicing of spring charging motor d) Checking, repairing & servicing of gearbox, auxilliary switches, spring, limit switch etc complete

e) Checking & repairing electrical and mechanical operations f) Checking & Repairing remote closing and tripping of VCB from 33KV control panel. g) Lubrication all moving parts with petroleum jelly & cleaning all bushing insulators with CTC h) Tightening of all mechanical connections of mechanism i) Tightening all HV and LV connection of VCB.

Supply only the following spares for servicing/repairing of 36 KV Circuit breaker of type PCOB 36 of Make : Areva or Schneider

a) Trip prop

b) Trip prop support assembly

c) Trip link support

d) Trip prop pin

e) Release prop

f) Release prop pin

g) Prop spring

h) Spring support block

j) ON/OFF indicator link

k) Motor Cut Off lever

l) Motor Cut off Switch

m) Motor for spring charging (Make: Bosch)

n)Reduction gear box

p) Auxiliary contactor

q) Raychet wheel assly

r) Ratchet pin

s) Drive link Assembly

t) Charging Pawl

u) Over ride (Stop) Pin

v) Bearing Nast

w) Auxiliary switch arrangement with Bell crank assy & operating link

x) Trip arrangement w/o coil

y) Trip coil

z) Release arrangement w/o coil

aa) Release coil

ab) Release roller

ac) Stop block assembly

Excavation in trenches n.exc 1.5mtr wide and not exc 1.5mtr depth and getting out in Soft/loose soil all as directed.

Returning and filling in of excavated material ay type including spreading, levelling, watering and well ramming in layers not exceeding 25 cm each.

Removal of surplus excavated material of any type not exceeding 50 mar and depositing where directed at a level not exceeding 1.5 mar above the starting point.

M&L for Sand cushioning/sand covering for underground cable protection complete all as specified. Note: Punned thickness only will be measured and paid.

Supply and laying sub class 'B' bricks of old size (23x11x7cm) laid along alignment of cable as protection to cable in trenches complete all as specified and directed by Engineer-in-Charge

M&L for GI pipe light grade 100 mm dia for cable protection on road crossings /plinth protection with fixed to the pole wall etc. suitable fittings for cable protection .

M&L cable jointing kit for 11 KV (Earthed) grade XLPE cable for outdoor end termination heat shrinkable type joint complete with jointing material and accessories suitable for size 3 core 185 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson

M&L cable jointing kit for 11 KV (Earthed) grade XLPE cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armored aluminium conductor cable of size 185 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson

S&L XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured ,electric power cables heavy duty with aluminium conductor, 11000 Volts grade ( earthed) of size 3 core 185 Sqmm complete in trenches/ ducts/ on pole etc complete all as directed . Make: Universal/ Nicco/ Polycab/Havells

M&L cable jointing kit for 11 KV (Earthed) grade XLPE cable for indoor end termination heat shrinkable type joint complete with jointing material and accessories suitable for size 3 core 185 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson.Make: M-Seal/ 3M/ Raychem/ Denson

M&L cable jointing kit for 33 KV (Earthed) grade XLPE cable for outdoor end termination heat shrinkable type joint complete with jointing material and accessories suitable for size 3 core 300 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson

M/L for inspecting, checking, servicing of 33KV Lightening arrestors by decarbonising of lighting arrestors, tightening all earthing connections and HV connections for proper contact, application of petroleum jelly of electrical connection, replacement of corroded nuts and bolts etc Complete

M/L for inspecting, checking, servicing of 33 KV Disc/post top insulator by carrying out the following:- a) Checking insulator for any cracks & pitting b) Checking the inter locking pins for corrosion and replacing if necessary. cleaning/decarbornising with CTC. c) Replacing the corroded, rusted nuts &bolts of clamps having conductors if necessary. d) Tightening of all supporting connections.

M/L for repairing/ Servicing of 33 KV/110 V PT(outdoor): a) Checking PT limb(Ceramic insulator) for any cracks, pitting and burns b) Cleaning/decarbonising with CTC c) Replacing insulator oil with New Oil. d) carrying/conducting ratio test. e) Tightening all primary and secondary connections. f) Tightening all basement fixing nuts & bolts.

M/L for Servicing of 33/11 KV CT(outdoor): a) Checking CT limb for any cracks, pitting and burns b) Cleaning/decarbonising the limbs with CTC c) Complete drain out of old insulating oil and filling new insulator oil. d) conducting ratio test. e) Tightening all primary and secondary connections.

M/L for repairing & servicing of 33KV gang operated air break isolator & earth switch comprising the following: a) Cleaning of contact for dust, oxidation & pitting with CTC. b) Cleaning of all insulators with CTC and observing any cracks and carbon deposits/contents. c) Repairing, adjusting the rotating arms for perfect operation including lubrication with petroleum jelly. d) Repairing/replacement of tension spring in fixed contacts.

e) Lubricating of all moving parts for smooth operation. f) Checking of auxiliary contacts and their calibration g) Applying petroleum jelly to all electrical contacts/moving contacts. h) Tightening of all electrical and mechanical connections.

Note for Item No 38 The rate quoted deemed to be inclusive of Consumables like nuts & bolts, washers, petroleum jelly, CTC etc & T&P etc complete and necessary safety measures for working in 33 KV yard.

M&L for preparation of steel surfaces of 33 KV structural yard consisting of GODs, CTs, PTs, surge monitors and circuit breakers including yard structures and painting with a coat of Zinc chromate primer on rusted surfaces & applying a coat of rich zinc mix aluminum paint for structures and approved colour synthetic enamel paint on switch gears, transformers etc complete including preparation of surfaces etc. complete all as directed.

Supply and fix disc type insulator, porcelain vitreous 170mm high and 280mm dia tongue and cleave type brown, 3in series assembly for tension clamping with tension clamp for conductor working pressure 33 KV conforming to IS 731 - 1971 and 3188-1965 including dismantling old one Make: Jayshree/Jaipuria/ Southern insulators/WSI

Supply and fix pin type insulator, porcelain vitreous 225mm high and 225mm dia including one galvanised mild steel spindle two galvanised iron washers and one galvanised iron nut for conductor working pressure 33 KV conforming to IS 731 - 1971 and 3188-1965 including dismantling old one. Make: Jayshree/Jaipuria/ Southern insulators/WSI

M&L for dismantling the LT/HT connections, earthings, controlling cables carefully from the transformer installed on plinth of 33 KV yard and loading the 5 MVA transformer of minimum 10200 kg weight with cranes of capacity not less than 20 tonnes and above on the transporting trolley vehicle all as directed by Engr-in-charge.

M&L for transporting the unsv transformer 5 MVA on trolley vehicle of suitable capacity to workshop from 33 kv MRS at INS Eksila carefullyand all as directed by Engr-in-charge.

M&L for loading the 5 MVA transformer of minimum with cranes of capacity not less than 20 tonnes and above on the transporting trolley vehicle after the repairs at workshop and transporting from workshop to 33 kv MRS at INS Eksila and placing with suitable cranes on the transformer plinth carefully and all as directed by Engr-in-charge.

Note: i) Any damage to insulators/bushes/windings etc while in the custody of the contractor shall be made good at no extra cost to govt. The serviceability of the transformer shall be checked and confirming by the contractor before taking into his custody.

ii) M&L for rewinding/reinsulation of HT/LT (Primary/Secondary)coils, bushes, studs, Transformer oil, filteration of oil, cable box, replacement of Buchholtz relay /MOG, repair/servicing of OLTC etc will be measured and paid separately under relevant item herein after:-

M&L for dismantling the LT/HT connections, earthings, controlling cables and loading the 1000 KVA transformer of minimum 3979 kg weight with cranes of capacity not less than10 tonnes and above on the transporting trolley vehicle, transporting to workshop from INS Eksila and returning it after completion of repair work to INS Eksila including connecting it with incoming & outgoing connections, earthings, controlling cables all as directed by Engr-in-charge.

Note: i) Any damage to insulators/bushes/windings etc while in the custody of the contractor shall be made good at no extra cost to govt. The serviceability of the transformer shall be checked and confirming by the contractor before taking into his custody. ii) M&L for rewinding/reinsulation of HT/LT (Primary/Secondary)coils, bushes, studs, Transformer oil, filteration of oil, cable box, replacement of Buchholtz relay /MOG, repair/servicing of OLTC etc will be measured and paid separately under relevant item herein after.

M&L for carrying out repairs in 5 MVA transformer comprising the following:-

a) M&L for draining out transformer 5 MVA in the suitable capacity of container/ drums and keeping it in safe custody for reuse. b) M&L for lifting, Transporting & handling the transformer to within the work shop and opening top cover of the transformer by unscrewing nuts/ bolts/ washers etc, including disconnecting core assembly from HT/LT bushing and lifting the same gently with the help of crane and taking out from the shell (container/body) of the transformer. c) M&L for visual inspection of entire core assembly, transformer tank, core limbs, OLTC etc , locating the fault/damages complete and all as directed.

d) M&L for cleaning the transformer body from inside, removing deposited dirt/sludge/foreign particles etc from the bottom/body of the transformer, cleaning with CTC and drying up the shell from inside before refilling of the transformer oil. e) M&L for cleaning and washing thoroughly core and serviceable windings of the transformer by hosing down with clean dry oil conforming to IS336/1983 removing deposited dirt/sludge/foreign particles from the windings/core through inspection of windings providing insulations to leads and terminals complete and re-assembling the core including newly winded coils etc and all as directed f) M&L for heating/drying/baking complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc all as per IS 1986-87 and directed by Engr-in-Charge.

g) Lifting and refixing core assembly inside the transformer shell gently and carefully connecting Primary/Secondary/Neutral terminal connections to the bushings assembly, fixing of Tap changer including tightening of nuts, bolts, washers of the core to reduce humming noise & all as directed. h) Refilling the filtered transformer oil in the shell of transformer complete. j) Refixing the top cover including replacement of cork sheet/gasket 8 mm thick tightening of nuts/bolts/washers etc and replacement of breather with silica gel.

k) Lifting/Shifting to the place from where removed and re-installing the transformer including connecting Primary/Secondary/Neutral connections etc as directed by Engr-in-Charge.

l) The inspection of transformer shall involve:-

i) Checking of all clamps, nuts, bolts including core bolts & cover fixing bolts.

ii) Checking all brazings, joints, Tap heads and connection joints.

iii) Checking all jumpers, terminations/connections inside the transformer.

iv) Checking the Buchholtz relay/conservator MOG if any.

v) Painting of transformer complete with two coats of synthetic enamel paint externally and painting with a coat of oil resistant paint inside the transformer shell complete all as directed by Engr-in-Charge.

vi) Inspection of tap changer checking the moving and fixed contacts for contact wear and connection to winding.

m) Conducting the tests on core and windings as per IS like IR tes, ratio magnetic imbalance, short circuit etc in presence of Engr-in Charge and test results shall be signed both by the contractor and Engr-in-Charge and kept on record.

M&L for overhauling OLTC of 33KV/11KV transgformer of capacity 5000KVA by draining out of transformer oil dismantling of top cover, inspection of moving and fixed contacts of all three phases and checking the operation clening and removal of contacts of all the three phases and checking the operation cleaning and removal of all carbon particals. Checking the thickness of leads in the OLTC board,and moving/fixed contacts,inspection of transition resistance and replacement of gasket/contacts etc,if found damaged reassembling complete.Filling up of oil testing complete all as directed by Engr-in-Charge. NOTE :- Spares if any required will be measured and paid separately

Supply & replace following spares for repair or OLTC of 33KV/11KV transformer of capacity 5000KVA

Main moving contacts

Resistance contacts

Transition resistance

Fixed contacts

M&L Filtration of transformer oil of transformers installed at various locations to achieve di-electric strength not less than 50 KV at 2.5mm gap as per relevant IS with portable filtration plant, testing of the oil for the di-electric strength before filtration and after filtration complete all as directed by the Engineer-in-Charge.

Supply and topping up of transformer oil with di-electric strength not less than 50 KV in to the conservator tank/ body tank of the transforme etc complete all as directed by the Engineer-in-Charge. [Make: Poweroil/ Transol/ Sabitha Chemicals]

M&L for rewinding of 33KV/11KV power transformer HV coil (Primary side) of any capacity/type by winding defective coils with new copper wire with kraft paper insulation as per IS of same gauge and existing size together with new insulated materials/bracings before placing in to the transformer and assembling the coil with new insulation materials, varnishing and fitting the coils in the chamber,testing and commissioning the transformer and recording the test results complete all as directed. NOTE:- M&L for re-insulation of serviceable coils will be measured and paid separately under relavent items)

M&L for rewinding of 33KV/11KV power transformer LV coil (Secondary side) of any capacity/type by winding defective coils with new copper wire with kraft paper insulation as per IS of same gauge and existing size together with new insulated materials/bracings before placing in to the transformer and assembling the coil with new insulation materials, varnishing and fitting the coils in the chamber,testing and commissioning the transformer and recording the test results complete all as directed. NOTE:- M&L for re-insulation of serviceable coils will be measured and paid separately under relavent items)

M&L for rewinding of11 KV/433 V Step down transformer HV side of any capacity/type by winding defective coils with new copper wire with kraft paper insulation as per IS of same gauge and existing size together with new insulated materials/bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber,testing and commissioning the transformer and recording the test results complete all as directed. NOTE:- M&L for re-insulation of serviceable coils will be measured and paid separately under relavent items)

M&L for rewinding of11 KV/433 V Step down transformer LV side of any capacity/type by winding defective coils with new copper wire with kraft paper insulation as per IS of same gauge and existing size together with new insulated materials/bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber,testing and commissioning the transformer and recording the test results complete all as directed. NOTE:- M&L for g re-insulation of serviceable coils will be measured and paid separately under relavent items)

M&L for replacement of Buchholtz relay for transformer of capacity1600 KVA to 5000 KVA

M&L for replacement of MOG of conservator for following capacity transformers

1000 KVA 11KV/433 V transformer

5000KVA 33KV/11KV transformer

M&L for re- insulating windings of transformers of any capacity/size/type by strip opening of HT/LT coils (i.e. Primary/Secondary coils) from core assembly safely unwinding the HT/LT coils (ie Primary/Secondary coils) complete, removing the old defective insulation paper and replacing with new DPC insulation to the copper conductor. Re-varnishing of the windings with super varnish including heating/drying/backing complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc all as per IS 1986-87 and as directed by Engr-in-Charge.

M&L for re-insulating copper coils of HT windings of transformer of capacity /size/type.

M&L for replacement of silica gel breather assembly for transformers of the capacity including dismantling old one

1000 KVA 11 KV/433V transformer

1600 KVA 11 KV/433V transformer

5000 KVA 33KV/11 KV transformer

M&L replacement gun metal drain valves of transformers of following capacities including dismantling old one:-

1000 KVA to 1600 KVA 11KV/433 V transformer

5000KVA 33 KV/11KV transformer

M&L for replacement radiator valves for 5000 KVA 33KV/11KV transformer including dismantling old one

M&L for replacement of the LT porcelain bushings complete of following capacity transformers of any make/size/type all as directed including dismantling old one

1000 KVA to 1600 KVA 11KV/433 V transformer

5000KVA 33 KV/11KV transformer

M&L for replacement of the HT porcelain bushings complete of following capacity transformers of any make/size/type all as directed including dismantling old one

1000 KVA to 1600 KVA 11KV/433 V transformer

5000KVA 33 KV/11KV transformer

M&L for replacement of the LT bushing rods made out of gun metal with threading and of suitable length/size all as per existing including metal rings/bolts/washers/rubber rings etc complete of the following capacity transformers of any make/size/type all as directed including dismantling old one.

1000 KVA to 1600 KVA 11KV/433 V transformer

5000KVA 33 KV/11KV transformer

M&L for replacement of the HT bushing rods made out of gun metal with threading and of suitable length/size all as per existing including metal rings/bolts/washers/rubber rings etc complete of the following capacity transformers of any make/size/type all as directed including dismantling old one.

1000 KVA to 1600 KVA 11KV/433 V transformer

5000KVA 33 KV/11KV transformer

M&L for replacement of winding temperature indicator (WTI) for 5000 KVA ,33/11KV transformer including dismantling old one

M&L for replacement of oil temperature indicator (OTI) for 5000 KVA ,33/11KV transformer including dismantling old one

M&L for attending breakdown of 5 MVA power transformer and carrying out dismantling of LT/HT connections, earthings, controlling cables carefully from the transformer installed on plinth of 33 KV yard to carryout onsite testing and all as directed by Engr-in-charge.

M&L for carrying out following onsite test with testing equipments and all as directed:- i) IR Test ii) Magnetic imbalance test iii) Ratio test iv) Di-electric test of oil v) Flame test

UV POWER TECH

GVS ASSOCIATES

M/S CHANDRA ENGINEERS AND CONTRACTORS

M.V.K.ENTERPRISES