REPAIR AND MAINTENANCE OF HT SWITCHGEAR POWER TRANSFORMER AND OTHER EQUIPMENT IN MAINTENANCE YARD WITH CONNECTED 11 KV REROUTING OF HT 33/11 KV KIRBY GRID AND MAINTENANCE OF LT PANELS/FEEDER PILLARS AT ME LINE AOC SUB STN DENTAL OFFICERS MESS OVAL SU

Amount

Supply, installation & commissioning in replacement of 48V/20A Float Cum Boost Battery Charger unit. The CCCV battery charger consisting of copper wound, air cooled step down transformer 220 Volt/48 Volt, 01 Set single phase full wave bridge rectifier consisting of diodes and SCRs, liberally rated mounted on heat sink and complete with resistor/condenser network for surge suppression . During auto float mode automatic changeover shall take place from float mode to boost mode and vice versa, 01 Set of solid state constant potential controller to stabilize the DC output voltage of the float cum boost charger, 01 No electronic controller , DC digital ammeter , DC digital voltmeter, Potentiometer , DC, MCB for reverse battery protection . The charger should have alarm annunciation with visual and audible alarm with manual reset facility for fuse fail alarm. Float cum boost battery charger and DC distribution board shall be housed in powder coated sheet steel cubicle with panels of 1.6mm thickness , louvers for ventilation , gland plate will be provided for cable entry from bottom . Tech specification shall be as under:-

(a) Input working voltage-180 -270 Volts (b) Nominal Input Voltage - 230 V , AC , 50 Hz,1 (c) On load input power factor - > 0.8 (d) On load unit watt efficiencies-> 80% (e) No load losses of complete charge-< 10% (f) Ripple contents on the load (RMS)= 1% to 5% (g) Over load - 110% for 30 minutes and will give visual indication for over load condition. (h) Boost charging - 2.4 V/Cell . (j) Float charging -2.15 V/Cell (k) Float cum boost charging-Automatically changes from one state to another state as per battery condition and will give the visual indication for either float or boost based on charging mode. (l) Reverse polarity -No damage will caused . A visual indication for reverse polarity will appear with an audio alarm. (m) Short circuit-MCB protection provided.

M&L for ON load Centrifuging and dehydration including filtration and cleaning of transformer oil by dehydration machine of 33 KV transformer at site and topping up deficient transformer oil including testing of samples before and after dehydration and filtration complete all as specified and directed. Note :- Deficient quantity of Transformer oil required for top up shall be measured and paid separately under item No 3 here-in -after as supply only.

Supply only transformer oil of approved quality as per IS having dielectric strength of 45-60 KV in 2.5mm gap for filling in OLTC & for topping up in transformer as required and directed

Material and labour for servicing /testing of line circuit breaker, control panel including outdoor CT, PT and relays in control panel of outdoor SF 6 Gas Circuit Breaker of capacity 1250/800 Amps and rating 36 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Checking of Closing/Tripping coil assembly (ii) Adjustment of mechanism if required. (iii) Clean the circuit breaker to remove dust and dirt. (iv) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc. use grease for the operating shaft and bearings, and machine oil for other parts. (v) Check for rust, wear/tear. (vi) Checking of spring charge mechanism (vii) Visual check for any deformation. (viii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (ix) Check for loosened connections, damaged lead wires. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Replacement of Dashpot/shock absorbers. (xiii) Replacement of carbon brush of spring charging motor. (xiv) Cleaning of porcelain bushing (xv) Checking of limit switch.

(b) The following test shall be carried out:- (i) Primary Injection Test of outdoor CT / PT. (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance. (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault relay. (ii) Line differential relay. (d) Testing of following Aux relay:- (i) DC Supply supervision relay. (ii) Trip Circuit supervision relay. (ii) SF 6 gas pressure low. (iii) PT Fuse failure relay. (iv) Master trip relay. (v) Under voltage relay. (vi) Over voltage relay

Material and labour for servicing /testing of transformer circuit breaker, control panel including outdoor CT, PT and relays in control panel of outdoor SF 6 Gas Circuit Breaker of capacity 1250/800 Amps and rating 36 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Checking of Closing/Tripping coil assembly. (ii) Adjustment of mechanism if required. (iii) Clean the circuit breaker to remove dust and dirt. (iv) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc. use grease for the operating shaft and bearings, and machine oil for other parts. (v) Check for rust and wear/tear. (vi) Checking of spring charge mechanism. (vii) Visual check for rust and deformation. (viii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (ix) Check for loosened connections, rust, damaged lead wires. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & tripping coil. (xii) Replacement of Dashpot/shock absorbers . (xiii) Replacement of carbon brush of spring charging motor. (xiv) Cleaning of porcelain bushing (xv) Checking of limit switch etc.

(b) The following test shall be carried out:- (i) Primary Injection Test of outdoor CT / PT. (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with merger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance. (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault Relay. (ii) Transformer differential relay. (d) Testing of following Aux relay (i) DC supply supervision relay. (ii) CB SF 6 gas pressure low. (iii) Master trip relay. (iv) Main Buchholz trip. (v) Buchholz OLTC Trip. (vi) SPR & PRV trip. (vii) Winding temp high trip. (viii) Oil temp high trip. (ix) Main Buchholz alarm. (x) Winding temp High alarm. (xi) Low Oil level alarm. (xii) Oil temp high alarm

Material and labour for servicing /testing of breaker/control panel including CT, PT and relays in control panel of VCB of capacity 1250 /800/630 Amps and rating 11 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Adjustment of mechanism if required. (ii) Clean the circuit breaker to remove dust and dirt. The envelope of the vacuum interrupter and insulating materials shall be wiped with a clean cloth. (iii) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (iv) Check for rust and wear. (v) Check Spring Tension and pitting of the Cluster Contacts. (vi) Visual check for rust and deformation. (vii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (viii) Check for loosened connections, rust, damaged lead wires. (ix) Check whether the contacts are damaged by arcing. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Checking of Jaw Contacts Conditions and repair/adjust. (xiii) Replace the jaw contacts, If required. (xiv) Applying of epoxy Paint for Support /Spout insulator, CTs, PTs, and epoxy body at inside of VCB for improvement of resistance value. (xv) Replacement of Dashpot/shock absorbers . (xvi) Replacement of carbon brush of spring charging motor.

(b) The following test shall be carried out:- (i) Primary Injection Test of CT / PT. (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with merger in open and closed condition. (iv) Contact resistance test for all three poles. (v) Closing coil resistance. (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit , checking and programming of relay :- (i) Over current and earth fault relay. (d) Testing of following Aux relay. (i) DC Supply supervision relay. (ii) Master trip relay.

Material and labour for topping up of / filling of SF-6 gas to achieve required gas pressure in 36 KV SF6 breaker and testing complete all as directed by Engr-in -charge.

S&F in replacement of closing coil assembly 50 volts DC of existing make for SF 6 breaker of capacity 1250 amps of rating 36 KV complete all as directed by Engr -in-Charge.

S&F in replacement of closing coil assembly 50 volts DC of existing make for VCB of capacity upto 1250 amps of rating 11 KV complete all as directed by Engr -in-Charge.

S&F in replacement of tripping coil assembly 50 volts DC of existing make for SF 6 breaker of capacity 1250 amps of rating 36 KV complete all as directed by Engr -in-Charge.

S&F in replacement of tripping coil assembly 50 volts DC of existing make for VCB of capacity upto 1250 amps of rating 11 KV complete all as directed by Engr -in-Charge.

S&F in replacement of motor & gear assembly 110/220V AC complete all as specified and directed

Material & labour for repair /overhauling/Servicing of OLTC ( On load tap changer ) of 33KV/11KV Power transformer of capacities 10 MVA at site by carried out following work of existing make (a) Opening of top plate of OLTC. (b) Draining out of transformers oil from the OLTC. (c) Stopping of leakage of oil from main shaft of OLTC including replacement of oil seal and all gasket of OLTC. (d) Checking /servicing of moving and fixed contact of OLTC and resistance test of contact. (e) Flushing of OLTC assembly with hot new oil and removing of sludge. (f) Filling of new transformer oil in OLTC. (g) Tightening of all tapping leads and connections. (h) Refixing of top plate of OLTC in original position after overhauling. (i) Electrical testing of manual/auto operation of OLTC. Note :- Transformer oil as required shall be measured and paid separately under item No 3 here-in -before as supply only.

Material and labour for Preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) on all sides of 33 KV outdoor SF-6 breakers with spraying machine including writing description of equipment in block English letter 50 mm high with white /black synthetic enamel paint complete all as directed by Engr -in-Charge

Material and labour for Preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) on all sides of Terminal Kiosk (TK) at 33 KV Yard with spraying machine including writing description of equipment in block English letter 25 mm high with white /black synthetic enamel paint complete all as directed by Engr -in-Charge.

Material and labour for Preparation of old painted surfaces of 33 KV Switch yard including all outer steel structures/ frame/gate of bus bay at Grid, having dimensions 47. m x 5.6m x 10m and steel housing of capacitor bank having dimension 9.5m x 8.8m (including top closed) by brushing/cleaning stains, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) with spraying machine in the yard including writing description of equipments in block English letters 100 mm high with white/black synthetic enamel paint complete all as specified and directed.

S&F in replacement PG clamps aluminium cast alloy (bi-metallic type) suitable for existing ACSR conductor of type Zebra/Panther/Sheep with GI nuts bolts complete all as specified and directed

S&F in replacement T-connectors/clamps aluminium cast alloy (bi-metallic type) suitable for existing ACSR conductor of type Zebra/Panther/Sheep with GI nuts bolts complete all as specified and directed

S&F in replacement CT clamps aluminium cast alloy (bi-metallic type) for both terminals suitable for ACSR conductor of type Zebra/Panther/Sheep with GI nuts bolts complete all as specified and directed

S&F in replacement PT clamps aluminium cast alloy (bi-metallic type) for both terminals suitable for ACSR conductor of type Zebra/Panther/Sheep with GI nuts bolts complete all as specified and directed

S&F in replacement Isolator clamps aluminium cast alloy (bi-metallic type) for both terminals suitable for ACSR conductor of type Zebra/Panther/Sheep with GI nuts bolts complete all as specified and directed

S&F in replacement SF-6 Breaker clamps aluminium cast alloy (bi-metallic type) for both terminals suitable for ACSR conductor of type Zebra/Panther/Sheep with GI nuts bolts complete all as specified and directed

S&F in replacement Line spacer clamps aluminium cast alloy (bi-metallic type) for both terminals suitable for ACSR conductor of type Zebra/Panther/Sheep with GI nuts bolts complete all as specified and directed

S&F in replacement silica gel with breather assembly, suitable for power transformer 33KV/11KV of 10/16 MVA capacity complete all as specified and directed

S&F in replacement of disc insulator with hardware fittings 33 KV grade complete all as specified and directed.

S&F in replacement of pin insulator with hardware fittings 33 KV grade complete all as specified and directed.

Material and labour for spreading of stone aggregate of nominal size not more than 40mm from the bay/yard manually without damaging any equipments, cable or parts of the 33 KV Grid bays, spreading & levelling of finished gravel uniformly in layers n. exc. 15 cm thick watered and rammed to true surface all as specified and directed

M&L for Servicing & Repairs to Air-break switch (isolator) off load, rotating type, 33 KV, 800 Amps to 1250 Amps capacity, with proper alignment of isolator rotating blades, with fixed contact jaws, arcing horns, applying petroleum jelly to moving mechanism, cleaning and lubricating to isolator gear box assembly, tightening all nuts, bolts and clamps of jumpers etc, repairing to isolator gear box assembly and making in proper serviceable condition for smooth functioning, testing and commissioning on load complete all as specified and directed.

Supplying and Fixing in repairs, male/moving contact/ rotating blade of HDE copper silver plated of Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity with all fixing nuts, bolts etc complete all as specified and directed.

Supplying and Fixing in repairs, Fixed Contacts, made of HDE copper, silver plated, of Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity with all fixing nuts, bolts etc. complete all as specified and directed.

Supplying and fixing in replacement of terminal pad for Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity

Supplying and fixing in replacement of arching horn for Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity

Supplying and fixing in replacement of auxiliary switch 16 Amp having (5 NO5 NC) suitable for Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity

Supply , installation, testing and commissioning (in set of 3) in replacement of air brake off load line isolator switch rotating type manually gear drive mechanism operated highest system voltage 36 KV rated current 1250 Amps triple pole with earthing device each pole consist of insulating pedestals 03 Nos on galvanized steel base as per BSS /IS including rotating blade of HDE copper and fixed contacts of same material , spring loaded arcing horns of adequate section to brake magnetizing current of transformer as directed with adequate 50mm dia GI operating pipe for operation from ground level and operating handle complete with both off and on positions complete all as specified and directed.

Supply, installation, testing and commissioning (in set of 3) in replacement of lightening arrestor SMX type complete with all fittings transmission class 36 KV 10 KA 50 Hz suitable for system voltage 33/36 KV complete all as specified and directed

Supplying ,fixing , testing of master trip relay , 50/24 Volt DC in control panel including wiring complete as directed at site

Supplying ,fixing , testing of Trip circuit supervision relay , 50/24 Volt DC in control panel including wiring complete as directed at site

Supplying ,fixing , testing of DC supervision relay , 50/24 Volt DC in control panel including wiring complete as directed at site

Supplying, fixing, testing of PT fuse failure relay,110 Volt AC in control panel including wiring complete as directed at site

Supply installation, testing and commissioning (in set of 3) in replacement Potential Transformer (PT) oil cooled out door single phase ( Earthed type) of voltage ratio 33 KV/110 V class 3P - 0.5-3, burden 50 VA insulation level of 70/170 KV as specified below:- (a) Normal System Voltage-33 KV. (b) Highest System Voltage-36 KV. (c) Rated Primary voltage- 33 KV/√3. (d) Rated secondary voltage- 110 V/√3. (e) Nos of Lt winding 2. (f) Metering Core Accuracy class - 0.5. (g) Metering Core Rated Burden- 50 VA. (h) Nos of Phase- Single (Earthed Type) (j) Protection core accuracy class - 3P. (k) Protection core rated Burden - 50 VA. (l) Rated Voltage Factor - 1.2 continuous & 1.5 for 30 Sec. (m) Insulation Level- 36/70 KV.170 KVP. (n) Temp rise at rated continuous thermal current over ambient at site - 45 0C. (o) Porcelain Bushing type - Hollow Cylinder (p) 1.2/50 macro second impulse withstand test vol -170 KV (Peak). (q) Creepage distance of HV bushing - 900 mm (min). (r) Primary & Secondary winding material - Copper

Supply and laying PVC insulated PVC sheathed cable galvanized steel strip or wire armoured electric control cables (Heavy duty) with stranded Copper conductor of size 2.5 sq mm 10 core 1100 Volts grade complete all as specified and directed.

All as per item No. 41 above but 2.5 sqmm 6 core copper conductor.

Material of labour for removal of aggregate including Hard surface cutting in PCC, pavement, etc for laying of control cables, pipes etc of any size up to an approximate width 30 cm and depth 30 cm and making good and refilling of aggregate after laying of pipe and cable complete all as directed at site.

Supplying, installation, commissioning (in set of 3) and testing in replacement of 11 KV Current Transformer (CT`s), indoor type, epoxy cast resin having ratio 1000/500/5-5 Amps , core -1, Class 5 P10 , 5 VA for protection , Core 2 Class 0.5 , 5 VA Core3: Class PS-X for metering, Short circuit time rating 13.4 kA for 3 Sec including associated wiring complete all as specified and directed

Supplying, installation, commissioning (in set of 3) and testing in replacement of 11 KV Current Transformer (CT`s), indoor type, epoxy cast resin having ratio 600/300/5-5 Amps , core -1, Class 5 P10 , 10 VA for protection , Core 2 Class 0.5 , 10 VA Core3: Class PS-X for metering, Short circuit time rating 13.4 kA for 3 Sec including associated wiring complete all as specified and directed

Supplying, installation, commissioning (in set of 3) and testing in replacement of 11 KV Current Transformer (CT`s), indoor type, epoxy cast resin having ratio 400/200/5-5 Amps , core -1, Class 5 P10 , 5 VA for protection , Core 2 Class 0.5 , 5 VA including associated wiring complete all as specified and directed

S&F in replacement of vacuum interrupter suitable for 630/800/1250amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement support rod with screws suitable for 630/800/1250 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement support insulator suitable for 630/800/1250 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement upper connector suitable for 630/800/1250 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement lower connector suitable for 630/800/1250 amps, 11 KV HT VCB complete all as specified and directed

M&L for Rewinding of heavy duty cooling fan, 3 phase, 50 Hz of size 24" of power transformer 33/11 KV capacity with super enameled copper wire as per existing gauge including heating, varnishing, etc complete as required and directed.

Supply and fixing of in replacement of TNC Switch 11 KV VCB 16 Amp suitable for existing 11 KV VCB.

Supplying & Fixing in replacement of spout insulator suitable for 630 to 1250 amps, 11 KV HT VCB complete all as specified and directed

Supplying, laying, jointing testing and connecting XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, 33 KV (E) grade, of size 400 sq mm, 3 core, laid in trenches complete all as specified & directed in replacement of underground cable. Note :- Excavation, earth work, cable protection, sand fillings, cable joint shall be measured and paid separately.

Supplying, laying, jointing testing and connecting in replacement XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with aluminum conductors, 11000 volts earthed grade, suitable for HT 11 KV(E) system, laid in trenches / ducts / encased in GI pipe / fixed to pole, including jointing & testing complete all as specified and directed of following sizes

120 sqmm 3 core.

185 sqmm 3 core

240 sqmm 3 core

300 sqmm 3 core

Supply & Fixing in replacement HDPE Pipe with necessary accessories/ fittings for cable protections/pole for crossing of culverts/nallah of following bore sizes

110 mm bore.

140 mm bore.

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 mtr in deep soft loose soil for laying / taking up/ taking down of cables and getting out and levelling of bottom surface to required level all as specified and directed by Engineer- in- Charge.

Returning filling in,. Including spreading, levelling,. Watering and well ramming soil in layers not exceeding 25 cm thick all as specified and directed.

Removing excavated material (i.e. soil) from site to a distance n. exc 50 mtrs and depositing where directed at a level n. exc. 1.5 mtr above the starting point all as specified and directed by Engineer-in-Charge.

Material and labour for river washed and screened, dry sand for filling in trenches below and around underground cables for cushioning of cables etc, complete all as specified.

Supplying & Laying reinforced precast concrete cable cover, class EHV, type 1 with peak, size 450mm x 230mm x 50mm in trenches for protecting under ground cable as per IS (for 33 KV Cable) including taking down complete all as specified and directed.

Laying only old cover obtained from srl item No 62 here in before.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1, flat size 300mmx 180mm x 40mm including taking down, complete all as directed at site.

Laying only old cable cover obtained under srl item No 64 here in before.

M&L for Bore earthing 150 mm dia buried by vertical boring machine, depth 50 mtr below ground level using earth electrode 50mm dia GI pipe medium grade duly drilled hole of 12mm dia, 115mm C/C on both side of the pipe including lowering in bore well upto the depth of 49 mtr and one mtr above the ground level. The pipe electrode should be filled around commercial salt charcoal dust, copper sulphate and magnesium phosphate of 30 cm layer each upto the full length of pipe. The bore well should have 12 mtr of length 150mm dia MS pipe for protection of bore well. Welding of GI Strip 50mmx6mm on earth electrode GI Pipe 50mm dia upto 10mtr below ground level and 15 mtr from the bore well to test point gun metal and PCC foundation surrounding the bore well 60cmx60cmx30cm all as directed by Engr-in-charge. GI strip more than 25mtr will be measured and paid separately. Note :- Cost of gun metal test point deemed to be included in the quoted rate.

Supply, installation, testing and commissioning (in set of 3) in replacement 33 KV current transformer oil cooled out door single phase, oil immersed and self cooled type of ratio 800-400/1-1-1-1 suitable for metering and protection equipment installed on control panels terminal block as specified below :- (a) Normal System Voltage-33 KV. (b) Highest System Voltage-36 KV. (c) Rated Primary current- 800-400 Amp. (d) Rated secondary current- 1 Amp. (e) Nos of Core - 4. (f) Core01: Accuracy class 5P10, 10VA, ALF ≥10. (g) Core02: Accuracy Class 1.0, 10VA, ISF ≤ 5. (h) Core 03 Protection core accuracy class -PS, Protection knee point voltage- 300 Volt at lower ratio. (j) Core 04-Spare. (k) Continuous thermal current rating 120 % of rated primary current. (l)Temp rise at rated continuous thermal current over ambient at site - Less than or equal to 45 degree C. (m) Insulation Level- 36/70 KV.170 KVP. (n) 1.2/50 Micro second impulse withstand test voltage- 170 KV (peak). (o) Short time thermal current rating for one second - 25 KA/1 Second. (p) Dynamic Current Rating - 62.5 KA ( peak). (q) Porcelain Bushing type - Hollow Cylinder. (r) Creepage distance of HV bushing - 900 mm (min). (s) Primary & Secondary winding material - Copper

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 1000 sqmm single core XLPE armoured aluminium conductor cable complete all as specified and directed.

Testing the cables with high voltage DC testing machine and locating the fault in the cables by fault locating machine to pin point exact position of fault, disconnecting faulty 33/11 KV HT cables of different sizes from both ends, removal of Fault, Re-connections and testing of Cables after removal of fault complete all as specified and directed. Note: (a) 33/11 KV HT cable & joints shall be measured and paid for separately under respective items of schedule. (b) Retrieved old serviceable cable cover will be laid in trenches for cable protection. If extra PCC cover and sand required at site shall be measured and paid separately under respective items of BOQs. (c) Excavation and earth work will be measured and paid for separately under respective items of schedule.

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

120 Sqmm to 185 Sqmm, 3 core.

240 Sqmm to 300 Sqmm 3 core

Boring of hole under road/pavement/hard standing or any other situation by manual means and suitable for passing of GI pipe 110 to 140 mm bore and making good both ends all specified and directed

Supply and fix cable jointing kit for 33 KV (Earthed ) grade cable for straight though outdoor heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 400 sqmm.

Material and Labour for Disconnection Electrically and Mechanically out door Power transformer 33/11 KV up to 16 MVA from HV, LV terminal and control wiring from transformer to control box/Marshaling box complete. Transportation of unserviceable transformer 33/11 KV of up to 16 MVA capacity including radiator by dismantling to workshop for carrying out necessary repairs. Cost of proper washing of radiator checking against any leakage/along and returning back to its original installation position/location is deemed to be included in quoted rates, re-installation, connecting mechanically and electrically, testing, commissioning at site and put on load complete all as specified and directed (Men power, T&P rates are deemed to be included in the quoted rates). Notes:- (i) Before lifting of Power Transformer GE/Engr-in-Charge must visit/ inspect the workshop. (ii) All testing equipments in workshop will be calibrated and must be certified by NABL only. (NABL certificate will be submitted by the contractor before lifting of transformer). (iii) Finally, GE/Engr-in-Charge will decide the workshop on the basis of last five years performance of workshop in the field of Power Transformer repair in MES only and will be binding on the contractor to execute the ibid scope of work from the factory decided by Engr-in-Charge.

Material and Labour for draining out Power Transformer 33/11 KV of up to 16 MVA Transformer oil including radiator and storing the oil in suitable container (Empty container shall be supplied by the contractor for filling of oil required and shall become the property of contractor after re-use of transformer oil) complete all as specified and directed.

Material and Labour for opening of top cover by unscrewing nut, bolts & washers etc and taking out core assembly from tank by disconnecting from tap changer HT & LT side bushing stud to outside by dismantling the channel of Power transformer 33/11 KV, up to 16 MVA capacity. After dismantling of Transformer and physical joint inspection of core coil assembly (removing all 3 limbs HV &LV winding from Core Assembly) washing of core assembly by hot oil for removing brunt carbon and copper particles and cleaning of complete top yoke by oil. Re Tanking after re-assembling core, coil , tap leads and tightening of top cover fixing of HV & LV Bushing, OLTC connection, Connection of CT. Filling of oil, conservator tank ready for final testing all as directed in presence of rep of MES. Note :- (i) Rewinding and copper coil cost will be measured in the respective item. (ii) Testing cost measured separately.

Supplying and fixing of complete set of 33/11 KV up to 16 MVA transformer gaskets and insulting material, creep tapes, Craft paper, Nomex Tapes, PCB, insulation glue, cotton tapes, webbing tapes etc complete all as specified and directed.

Material and Labour in repairs for rewinding of HT/LT coils with copper wire DPC/super enameled high quality matching with existing gauge and impedance including requisite insulating paper/material in each layer of winding after taking down old existing winding of HT/LT coils of power transformer 33/11 KV, up to 16 MVA complete. Note : (i) The rate quoted against these items is inclusive necessary provision of all types of insulating materials , heating and varnishing etc.

Material and Labour for drying/ovening of complete Core coil assembly(CCA) in vacuum chamber and continuous monitoring to improve of IR Values after varnishing the coil to eliminate moisture content from Power Transformer 33/11 KV, up to 16 MVA capacity complete .

Material and Labour after drying and ovening and Re-assembling of 33/11 KV, up to 16 MVA Transformer core, testing of magnetic circuit for IR values, assembly and connection of OLTC of all phases, testing of transformer at low voltage, checking of ratio and polarity test. all as specified and directed. Note: (i) These operations/tests shall be carried out in the factory, results found satisfactory before bringing transformer to the original site for re-installation. (ii) The quoted rates shall be deemed to include complete testing before and after repairs, as per IS-2026, Merger Ratio, LV&HV High Voltage Test, DVDF and vector Group Test and League/Pressure Testing at 0.35 Kg for 24 Hrs to check the healthiness of the transformer, No load test, Full load Test, Impedance test, Voltage/ short circuit impedance test. (iii) All testing will be carried out in presence of MES representative.

M&L for Laminated paper sticker of size 250 mm x 80 mm in silver colour and printing of feeder name/CT ratio etc as provided by AGE (U) E/S No - 1 in black colour and pasting the same on HT/LT panels complete all as specified and directed. Note :- Each sticker shall have different printing matter.

M/s JAIMAA ASSOCIATES

mayur enterprises

M P TYAGI ENGINEERS AND CONTRACTORS

DS CONSTRUCTION

Rajindera Enterprises

MV Engineers And Contractors