REPAIR MAINTENANCE OF TRANSFORMER HT BREAKERS HT CABLES HT GOD AND OTHER HT EQUIPMENTS AT MANKHURD UNDER GE NW MANKHURD IIIRD CALL

Amount

Filtration and dehydration of transformer oil using ON-LINE filtartion plant to remove moistrure and carbon contents to achieve dielectric strength of oil not less than 50KV in 4mm gap, Oil samples of each transformer, OCB and OFS etc are to be tested before and after filtration test, results to be recorded on a printed format and also painting the date of test on the equipment with synthetic enamel paint all as specified and directed and also including disconnecting the HT and LT cables and cleaning the bus bar surfaces and reconnecting the cables by providing copper washers, bolts, nuts etc all as specified and directed. Notes:- (i) Oil required for topping up for filtration will be measured and paid separately under respective item of BOQ . (ii) The quoted rates shall also be deemed to include for proper cleaning of the tank surfaces to make the same free from sludge etc. (iii) The qty of oil payable under this item shall be the net qty reused for filling after dehydration and filtration having dielectric strength not less than 50 KV in 4mm gap

Filtration and Dehydration of oil of 11 KV CT,PT by ON-LINE filtration plant to remove moisture and carbon contentents to acheive dielectric strength of oil not less than 50KV in 4mm gap and producing test result on records before and after filtration of each CTPT and also including servicing and painting the entire unit and reconnnecting the same all as specified and directed, Note - Oil required for topping up for filtration will be measured and paid separately under respective item of BOQ .

Material and Labour for supply and filling of Transformer insulation oil as per IS 335-1993 having die electric strength minimum 50 KV in 4mm gap for topping up in transformer, OCB, OFS etc all as specified and directed, Make: SAVITA/POWER OIL/APAR.

M&L for prepartion of old painted surfaces of transformer 100 to 315 KVA capacity, 11KV-22KV/433 Volt including removing of any oil spillage and applyIing two coats of anti corrosive paint of shade as per existing, complete all as specified and directed.

M&L for prepartion of old painted surfaces of transformer 400 to 630 KVA capacity , 11KV-22KV/433 Volt including removing of any oil spillage etc and applying two coats of anti corrosive paint of shade as per existing, complete all as specified and directed.

M & L for taking out unserviceable LT bushings with stud etc and replacing LT Bushings complete with and including copper/brass stud, rubber gasket, brass bolts, brass nuts, cable lugs etc for 11 KV - 22 KV/0.433 KV transformer of rating upto 315 KVA, complete all as specified and directed.

M & L for taking down/opening top cover of 11 KV - 22KV/0.433 KV transformer of rating upto 315 KVA, replacing the gasket of top cover and refixing the top cover, including testing, complete all as specified and directed. Note : Rate shall be including of all lifting arrangement, materials etc.

M & L for taking out unserviceable HT bushings with stud etc and replacing HT Bushings complete with and including copper/brass stud, rubber gasket, brass bolts, brass nuts, cable lugs etc for 11 KV/0.433 KV transformer of rating upto 315 KVA, all as specified and directed.

M & L for taking out unserviceable HT bushings with stud etc and replacing HT Bushings complete with and including copper/brass stud, rubber gasket, brass bolts, brass nuts, cable lugs etc for 22 KV/0.433 KV transformer of rating upto 315 KVA, all as specified and directed.

M & L for taking out unserviceable LT bushings with stud etc and replacing LT Bushings complete with and including copper/ brass stud, rubber gasket, brass bolts, brass nuts, cable lugs etc for 11 KV /0.433 KV transformer of rating 400 to 630 KVA, all as specified and directed.

M & L for taking down/opening top cover of 11 KV - 22KV/0.433 KV transformer of rating 400 to 630 KVA, replacing the gasket of top cover and refixing the top cover including testing, complete all as specified and directed.

M & L for taking out unserviceable HT bushings with stud etc and replacing HT bushings complete with and including copper/ brass stud, rubber gasket, brass bolts, brass nuts, cable lugs etc for 11 KV/0.433 KV transformer of rating 400 to 630 KVA, complete all as specified and directed.

M&L for faults locating of HT under ground cable PILCA/XLPE 11 KV/22KV upto 240 Sqmm size by using computerised / primary current injection method including cutting and removing the faulty portion and testing after jointing all as required and directed at site. Notes:-(i) Excavation, earth work, sand cushioning, PCC cover etc will be measured and paid separately under relevant items of BOQ. (ii) Cable joint will be measured and paid separately. (iii) Additional length of cable required at site for jointing will be measured and paid separately.

M&L for High pot charges for locating faults of HT under ground cable all as directed by Engr -in- Charge

M&L for heat shrink type straight through cable jointing kit suitable for 3 Core 95 sqmm 11 KV earthed XLPE cable complete with and including jointing materials, accessories and thimbles etc, complete all as specified and directed.

M&L for heat shrink type straight through cable jointing kit suitable for 3 Core 120-185 Sqmm 11 KV earthed XLPE cable complete with and including jointing materials, accessories and thimbles etc, complete all as specified and directed.

M&L for heat shrink type straight through cable jointing kit suitable for 3 Core 120-150 Sqmm 22 KV earthed XLPE cable complete with and including jointing materials, accessores and thimbles etc, complete all as specified and directed.

S & F in repairs indoor heat shrink type end termination cable jointing kit for 11 KV (Earthed) grade cable complete with and including jointing materials, accessories and thimbles etc suitable for 3 core XLPE armoured aluminium conductor cable of size 70 Sqmm to 95 Sqmm, complete all as specified and directed.

S & F in repairs indoor heat shrink type end termination cable jointing kit for 11 KV (Earthed) grade cable complete with and including jointing materials, accessories and thimbles etc suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm to 185 Sqmm, complete all as specified and directed.

S & F in repairs indoor Heat shrink type end termination cable jointing kit for 22 KV (earthed) grade cable complete with and including jointing materials, accessories and thimbles etc suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm complete all as specified and directed.

S & F in repairs out door heat shrink type end termination cable jointing kit for 22 KV (earthed) grade cable complete with and including jointing materials, accessories and thimbles etc suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm, complete all as specified and directed.

Taking out existing 11 KV/22 KV grade defective cable of any type and size from the trenches and from any other locations (including taking out of cable covers, pipes etc) complete all as directed. Note: Excavation and earth work shall be measured and paid for separtely.

Supply, laying and testing in trenches, road crossing, through pipes, ducts etc, XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured,electric power cable (heavy duty ) with aluminium conductor, 11000 volts grade (earthed), cross sectional area 120 Sqmm X 3 core, complete all as specified and directed.

Supply, laying and testing in trenches, road crossing, through pipes, ducts etc, XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured,electric power cable (heavy duty ) with aluminium conductor, 11000 volts grade (earthed), cross sectional area 185 Sqmm X 3 core, complete all as specified and directed.

Supply, laying and testing in trenches, road crossing, through pipes, ducts etc, XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured,electric power cable (heavy duty ) with aluminium conductor, 22000 volts grade (earthed), cross sectional area 120 Sqmm X 3 core, complete all as specified and directed.

Excavation in trenches not exceeding 1.5 M wide and n.exc 1.5 M in depth for cable etc and not exceeding 10 Sqm on plan and 1.50m in depth for independent holes etc, getting out in soft/loose, comnplete all as specified and directed.

Returning, filling in including spreading, levelling, watering and well ramming in layers approved earth not exc 25 cm thick, complete all as specified and directed.

Removing excavated material (soil/earth) not exc 50 M and depositing where directed at a level not exceeding 1.5 M above the starting point, complete all as specified and directed.

Supply, spreading and levelling fine dry river sand as in cable trench for cable cushioning and filling to cable duct in sub station, all as specified and directed. Note: Punned thickness will be measured and paid.

Supply and laying unreinforced precast factory made concrete cable cover, class HV, Type -I, flat, size 300mmx 180mm x40mm, complete all as specified and directed.

Supply & laying reinforced precast factory made concrete cable cover, class EHV, type -I with peak size 450mm x 230mm x 50mm complete all as specified and directed.

Supply & fix in replacement Silica Gel Breather with silica gel for 11 KV to 22 KV Transformer of Rating upto 630 KVA, complete all as specified and directed.

Overhauling of HT OCB 11 KV, 400 Amps, 250 MVA of Make Crompton Greaves/MEI/GEC/ Alstom installed at various locations after taking shut down from department and opening both incoming and outgoing connections, dismantling complete Circuit Breaker after detaching oil tank and draining out oil in a separate container and cleaning of oil tank throughly and carrying out the following repair work :- (i) Taking out complete parts of OCB separately viz. like ARC control pot assembly, jack ring , contact main, TULIP contact finger assembly, terminal bushing, moving contact block, fixed contact block, pick off spring assembly, moving ARC, Contact ARC, assembly of main moving contact, speed control device assembly etc and checking the same for its serviceability/ suitability for refixing, cleaning the OCB externally and internally including all parts thoroughly as per standard practice (also cleaning the male female contacts with emery papers and insulator with CRS spray and applying petrolium jelly/grease to the moving parts), reassembling complete parts of OCBs including replacement of existing unserviceable parts /components all as approved and directed. (ii) Taking out complete parts of Truck & Hoist Assembly, after removing old grease checking the same for its suitability/ serviceability and reassembling complete truck and hoist assembly after replacement of defective parts all as approved and directed including greasing and oiling the complete mechanism as per standard practice. (iii) Servicing of dependent/independent mechanism and spring charging mechanism including replacement of spares comprising of scope as under :- (a) Recommissioning including testing of HT OCB for overload setting and adjustment. (b) Recommissioning of complete Truck and Hoist assembly all as directed

(iv) Checking/testing/servicing of tank assembly/barrier, solenoid machianism, trip unit assembly, BUS bar spout epoxy cast side entry cable base busing, arrangment with drawable type PT assembly of male female housing etc complete including repalcement of defective parts with new all as directed. (v) Over hauling of HT panel of each OCB including cleaning of bus bar chember, CT's and painting all exposed surfaces with one coat of insulation paint of same colour and replacement of control fuses, replacement of panel heater and bus bar insulators all as directed and painting Alphbet/Numbers with bold letters upto 5 cm height with black colour. (vi) Checking/repairing the auxillary wiring. (vii) Testing of relays, CT & PT units and relay settings etc. NOTES: (i) Cost of all the materials, repairs and works as specified above as well as all the other elements (except followings) to make the OCB's fully functional shall be deemed to be included in the quoted rates :- (a) Cost for supply only of the components/parts/spares catered for under item Nos 32 to 41 to the extent required and operated here-in-after. (b) Cost for filteration and dehydration of transformer oil to achieve the desired dielectric value as catered for under item No. 1.00 here-in-before. (c) Cost for provision of additional transformer oil for topping-up as catered for under item No. 3.00 here-in-before. (ii) The above OCB's are located at : (a) SPDC (b) NAD COLONY (c) NAD DEPOT (d) Nausena Baugh (e) Mahul (f) CABS

Supply only OCB Top plate insulator Bus Bar side with current carrying parts for 11 KV OCB, Make Crompton Greaves/MEI/GEC/Alstom, capacity 400 Amps, 250 MVA rating, complete all as specified and directed.

Supply only spout insulator (Epoxy) for OCB Trolley complete with current carrying parts for 11 KV OCB, make Crompton Greaves/MEI/GEC/Alstom, capacity 400 Amps, 250 MVA rating, complete all as specified and directed.

Supply only spare of Main Contact Male suitable for any one phase of R, Y, B Phase for 11 KV OCB of make Crompton Greaves/MEI/GEC/ Alstom, capacity 400 Amps, 250 MVA rating, complete all as specified and directed.

Supply only spare of Main Contact Female suitable for any one phase of R, Y, B Phase for 11 KV OCB of make Crompton Greaves/MEI/GEC/ Alstom, capacity 400 Amps, 250 MVA rating, complete all as specified and directed.

Supply only 11 KV resin cast Single core single ratio Current transformer of ration 60/5Amps class C, 15 VA burden, including carrying out testing.

Supply only PT 11 KV/110 V AC, 100 VA, suitable for existing PT of OCB/VCB

M&L for dismantling HT 22 KV SF6 braker Make - ABB, open the cable termination compartement, Dismantle the HT cable temination burnt spout insulator, copper termination rod, rubber bushings and CTs and replace with new spout insulator, rubber bushings, CTs and copper cable termination rod, after replacing the above components, clean the splashes over compartment, servicing the entire braker, testing the braker standard parameters and set the Earth fault and over current relay all as per existing setting, after carryout above repairs, Megerring the braker for Phase to Phase and earth to phase, earth fault values with HT Megar, clean all the splashes over compartment completely , clean all spout insulator , Rubber insulator etc, complete all as specified and directed. Note : (a) Technician to be engaged for carrying out Maintenance Shall have HT Licence (b) Prior Liaison shall be done with the supply agency for HT Power Shut Down.

Supply only vacuum bottle type VG 2 of 11 KV VCB trolley rating 350MVA, current rating 630 Amps & Conforming to cat no MST10SG200300NA of Schneider/ ABB/ SIEMENS

Supply only epoxy Spout R, Y, B Phase Conforming to Cat no - MEP-39-32187 of Schnider Electric / ABB/SIEMENS

Supply only Single phase Bus Bar Spout for any Phase Conforming to Cat no - MEP-39-32185 of Schnider Electric/ ABB/SIEMENS

Supply only Single phase Bus Bar Spout for any Phase Conforming to Cat no - MEP-39-32186 of Schnider Electric/ ABB/SIEMENS

Supply only Copper Flexible connector 800 Amps Capacity suitable for VG2 VCB trolley, conforming to Cat no MCU39S4126302FNof Schnider /ABB/Siemens

Supply only Closing coil operating on 30 Volt DC for VCB trolley conforming to Cat no ECO39SN134700FN of Schnider/ ABB/Siemens

Supply only Trip coil operating on 30 Volt DC for VCB trolley conforming to Cat no ECO39SN133900FN of Schnider/ ABB/Siemens

Supply only Silver plated copper Isolating contact flat type 800 Amps capacity, including mounting screws conforming to Cat no MVIK00190-01 of Schnider / ABB/Siemens

Supply only Insulator for Bus Bar Support insolator, Conforming to Cat no MEP-39-37399 of Schnider /ABB/Siemens

Supply only Drive beam conforming to cat no MSM39S0118600FN of Schnider / ABB/Siemens

Supply only buffer for opening spring, conformin to cat no MVIJ0098-01 of Schnider,/ABB/Siemens

Supply only buffer for closing spring, conformin to cat no MVIJ0056-01 of Schnider/ ABB/Siemens

Supply only Spring charging motor with gear box, the motor shall be operating on 110 V AC supply.conformin to cat no MVIJ00157-01 of Schnider/ ABB/Siemens

Supply only local remote switch for vaccum circuit Breaker

Supply only Indicator lamp ,30 Volts, pin type as per sample.

Supply only Flange Tank Gasket suitable for existing size for OCB

Supply only Earth fault and Over current relay suitable for existing VCB

Supply only PT primary fuse for 11 KV, 3 Amp

M&L for dismantling HT 22 KV Fuse from fuse compartment of SF6 braker of Make - ABB, replacing with new fuse of rating IN- 16 Amps, U N -24 KV, 13 - 55 A, 11- 63 KA, including Cleaning the fuse compartment, complete fuse shall be of Cat No 1YMB531004M0003 of ABB Make. Note- a) Technician to be engaged carrying out Maintenance Shall have HT Licence. (b) Prior Liaison shall be done with the supply agency for HT Power Shut Down.

M & L for servicing IDMT relays (Two Nos over current and one No earth fault relays) fixed in 11 KV HT panels for primary and secondary injection and calibration of all the relays and setting the relay tripping timings in advance to match the outgoing load on the Incoming and outgoing feeders, complete all as specified and directed.

Supply and fix in replacement of old unserviceable battery charging unit Input - 230 VAC and Out Put 30 V DC, Maximum 10 Amps Current Out Put for charging of battery bank.

Supply and fix in replacement battery back up unit comprising of 15 Nos of 2 Volt, 100 AH VRLA battery including provision of interconnection link for connecting batteries to achive 30 Volt out put, complete all as specified and directed.

Supply and fix in replacement of old U/S power pack with battery back complete with following specification : - (a) Input Voltage : 230 VAC +20%, -30% and Out put Voltage : 24VDC/30VD. (b) Output Load : 100W Nominal (c) Continuous Load : 100 Watts with AC input ON/OFF. (d) Impulse Load : 450 W with AC input ON/OFF. (e) Battery Charging with AC input ON (f) Over voltage protection and Short circuit protection. (g) Indications on the front of the unit : Charger ON, Output switch OFF, Battery operation, Output over load and Out put ON. (h) Output ON/OFF switch is provided on front side of the module.

Material and labour for scrapping of old paint and applying two coats of Aluminium paint over a coat of Red oxide all for 22 KV two pole structure including GOD & operating rod

M&L for earthing complete with copper earth plate electrode 600x 600x 3 mm buried directly in ground with top edge of the plate not less than 1.5 mtrs below normal ground level and connected to earth test point by means of copper Strip of size 20x3 mm all as specified and shown in electric plate No 3 of MES SSR Part-I including necessary excavation and earthwork, PCC chamber, CI cover, protection and watering pipe, funnel, mesh etc all as required at site and all as directed and including taking down of old earthing materials, complete all as specified and directed. Notes: (1). Cost for provision of 7.5 RM Copper strip and G I protection pipe 25mm bore, light grade sahll also deemed to be included in quoted rates. (2). Earth resistance of earth pit should be less than 0.5 Ohms. On testing, if the desired earth resistance is not obtained, the earthing will be redone at no extra cost. (3) Rate quoted by the tenderer shall also be deemed to include salt & Charcoal fillings upto & above 450 mm top of Copper plate.

S&F copper strip of size 20 x 3.00mm including welding, brazing and taking down of old copper strip as required at site, complete all as specified and directed.

Material and labour loose filling with graded coarse stone aggregate 40 mm for out type sub Stations not exceeding 15 Cm thick.

Dismantling air break gang operated switches vertical/horizontal mounted incl insulators and operating mechanism for repair/replacement of broken/worn out components and insulators etc.

Supply and fixing triple pole mechanically operated air break isolator (GOD), vertical mounting, rotating type, mounted on insulator and steel frame with operating mechanism worked from ground level complete in all respect such as gun metal moving contacts and spring loaded gun metal fixed jaws, knife copper jumper strip etc, suitable for 22000 Volts grade, 50 Hz, with 9 insulator of rating upto 200 Amps complete all as specified and as directed.

S & F drop out fuse single pole mounted on insulator, 22000 Volts grade double pole steel frame of current rating 50 Amps including taking down existing DO fuse complete and removing from site complete all as specified and directed.

Supply only DO insulator suitable for 22 KV with metal part conforming to IS-5572-1972.

M & L for Steel tubular swaged pole complete with cast iron base plate, finial taper plug, bolts, nuts and screws as specified type 410 SP-55 (11m long) conforming to IS-2713 (Part-I & II) including painting of pole with two coats of aluminum paint over a coat of red oxide primer from top of the pole to 1.5m above the bottom of the pole and painting with two coats of black paint over a coat of red oxide primer upto 1.5m from bottom of the pole including numbering of poles as directed complete all as specified and directed.(Note: Excavation and earth work and PCC shall be measured and paid separately under respective item)

M & L for PCC 1:4:8, type D-2, (using 40mm graded stone aggregate) as in foundation, filling and mass concrete complete all as specified and directed.

M & L for PCC 1:3:6, type C-2, (using 40mm graded stone aggregate) as in foundation filling and mass concrete complete all as specified and directed.

M & L for PCC 1:2:4, type B-1, (using 20mm graded stone aggregate) as in coping including necessary use & waste of form work complete all as specified and directed.

M & L for servicing (as described below) for outdoor type, HT 11 KV/433 Volt, Dry type Transformer of capacity 1000 KVA, Make : Kirloskar :- (a) Servicing, cleaning, inspecting and testing for proper functioning of operation. (b) Servicing of de-hummidifying of core coils assly by hot air blower. (c) Cleaning of the coils of dust & other paraticles. (d) Retightening of all the tie rods & core blots. (e) Checking gaskets for the HT/LT insulators & Replaceing the same. (g) Internal touch up for the elcosures & external touch up paint.

Chaudhary Enterprises