REPAIRS / MAINT OF HT DISTRIBUTION NETWORK SYSTEM,CONTROL GEARS,SUBSTATION EQUIPMENTS INCLUDING CONNECTED WORKS UNDER GE CHENNAI

Amount

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m depth and getting out in soft / loose soil for laying cables / pipes / erection of poles etc all as specified and as directed.

Returning filling in soil including spreading leveling watering well ramming in layers not exceeding 25 cm each all as specified and as directed.

Removing excavated material (soil) not exceeding 50 m and depositing where directed at a level not exceeding 1.5 m above the starting point all as specified and as directed.

M&L for fine seived excavated dry soil laid to the required width of trench at botom and top of cable as cushioning to cable complete all as specified . Note :- Thickness shall be measured after punning

Supply and lay reinforced precast concrete cable cover, class HV, type 1 with peak, of size 300mm x 180mm x 40mm complete all as specified and as directed.

Supply and laying the following HT UG Cable XLPE insulated with multistranded aluminium conductor armoured with galvanized steel wire strip tap 11000 volts grade conforming to IS specifications in trenches/ poles/ wall etc and including taking down the existing unserviceable cable complete all as specified and as directed by Engineer-in-Charge :-

HT UG Cable of size 3 core 95 sqmm .

HT UG Cable of size 3 core 120 sqmm .

Supply and lay galvanized iron tubing of 100 mm dia ,light grade in trenches / fixed on poles /walls with suitable clamps etc complete including all necessary fittings including taking down the old unserviceable one complete all as specified and as directed .

S&F in repairs danger notice plate of 1.6 mm thick mild steel sheet, vitreous enameled white with letters, figures and conventional skull and bones in signal red color and fixed with MS clamps, bolts and nuts suitable for HT of approved of size 25x20 cm complete all as specified and as directed.

S&F in repairs out door type cable end termination joint kit heat shrinkable type for HT XLPE 11000 volt grade cable of size 3 core and connecting the cable with the load and testing complete all as specified and as directed for the following size of the cable.Make: M-Seal/Birla 3M/Denson Note : Excavation shall be measured and paid separately under relevant item

For cable of size 95 Sqmm x 3 Core

For cable of size 120 sq mm x 3 core

S&F in repairs indoor type cable end termination joint kit heat shrinkable type for HT XLPE 11000 volt grade cable of size 3 core and connecting the cable with the load and testing complete all as specified and as directed for the following size of the cable.Make: M-Seal/Birla 3M/Denson Note : Excavation shall be measured and paid separately under relevant item

For cable of size 95 Sqmm x 3 Core

For cable of size 120 sq mm x 3 core

S&F cable jointing kit for 11 KV 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 size 240 Sqmm to 400 Sqmm , Indoor / Outdoor type complete all as directed.

M&L for repairing HT panel of any size by replacing corroded / damaged portion with MS sheet,hinges etc as required by proper welding, and make panel serviceable and preparing surface of HT panel by removing rust etc and scapping with emery sheet and applying two coats of synthetic enamel of grey colour paint by using spray machine including writing MES No,name of equipment,name of feeder etc complete all as specified and as directed

M&L for taking out bottom trolly of HT VCB11 KV 630 Amps capacity by disconnecting power supply and carrying out servicing and maintenance of operating mechanism, latch assembly spring mechanism, checking of electrical control wiring of VCB and checking for proper functioning of shunt trip coil, lubricating of all moving parts and checking /cleaning of alignment of moving contacts with fixed contact assembly for proper functioning of operation and reassembling of bottom trolly of HT VCB fixed in its original position and testing for smooth functioning complete all as specified and as directed by Engineer-in- charge

M&L for calibration of IDMT relays, set of three , through relay test kit inlcuding other required measuring equipment to the site by secondary injection method and testing for proper functioning/tripping systems of relays complete all as specified and as directed. Note : Quoted rate shall be inclusive for checking the relays in VCB for its proper setting / fuctioning and tripping of VCB during over load /earth fault for the period of entire quarter.

S&F HT current transformer of capacity for suitable to the existing rating including testing commissioning through primary injection method with suitable testing kit including checking the control panel wiring and setting the CT range with relays setting for proper functioning/tripping and taking out old unserviceable CT complete all as specified and as directed.

S&F in repairs big and small end bearing of HT 11 KV VCB trolly including replacement of complete locking mechanism with integral spring charging handle for manual spring charge and closing coil ,triping coil 24V DC , electro magnetic relay, coil rating 220V, AC with existing makes such as Crompton greaves/ABB/Schneider complete all as specified and as directed.

S&F in repairs resin encapsulated vacuum interrupter bottles of the same manufacturers as per existing circuit breaker trolley of 11 KV complete all as specified and as directed. . Make: ABB/Schneider/L&T/CG

S&F in repairs spring charge universal motor suitable for 11 KV, VCB,working on 230 volt complete all as specified and as directed. Make: CG/Schneider/ABB/L&T

S&F in repairs current transformer moulded in epoxy compound with dual ration capacity, suitable to the existing rating , connection with copper wire including beading as per existing VCB 11 KV at site complete all as specified and directed by Engineer-in charge.

S&F gang operated device 11 KV Triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 200 amps complete all as specified and directed

S&F in repairs 11 KV lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp complete

S&F Horn gap fuse unit assembly tripple pole outdoor type suitable for HT 11 KV up to 400 Amp complete all as specified

M&L for preparation of old painted surface by removing dust and other deposited materials by scraping from HT tubular pole of 11 metre long including cross arms, cable protection pipe,clamps etc with two coats of aluminium paint including preparing the surface of pole complete all as specified and as directed by Engineer-in-Charge.

Supply and lay synthetic rubber insulated mat of 2.50 mm thick for voltage 11 KV for electrical purpose as per IS 15652-2006 suitable for electrical shock safety of size 2.0 m x1.0 m complete all as specified and as directed.

S&F mild steel chequered plates 410 w ( Gde -E250 ) quality A , channels, square cut or notched (ordinary and counter sunk) forming holes, without any attachment as in cable cover in trenches at subsatation and other locations complete all as specified and directed

M&L for finding out the cable fault of any size of cable upto 11 KV underground cable (HT of any capacity of cable with the help of cable fault loacator machine mounting on vehicle and with nessary disconnection of cable from two ends and making necessary connection by joing the cable after removing fault portion of cable with the following accessories as required alonwith electrician at site to find fault in HT cable upto a length of 10 KM including necessary earth work excavation,returning filling etc as required at site complete all as specified and directed by Engineer-in-Charge : (a) Surge Generator with accessories (b) Head Phone (c) Pin Point Set T-505 with accessories (d) Earthing cable with clamp (e) Cable fault Locator T-905 with accessories (f) TC-808 with accessories (g) Soldering Iron/wire/capacitor unit/capacitor connecting cables/ power cable/nose plier.

S&F in repairs Digital Voltmeter, 11 KV as suitable for the existing size complete all as specified . Make: Schneider / L&T / Elmeasure

S&F insulator, porcelain, vitreous 150mm high and 150mm dia ball and socket type, white, brown or green and two-in-series' assembly for tension with tension clamps for conductors, working pressure 11000 volts complete complete all as specified and directed

S&F Space Heater Electrical Panel switch gear for HT/LT Panel boards/Electronice instrument panels of capacity 100watts with automatic thermostat cutoff with a temperature range of 70 degree centigrade all as specified and as directed

Removing the existing machine pressed pre cast concrete interlocking paver block of any shape and size and refixing the same after cleaning and filling required quantity of sand bedding complete all as specified and directed by Engineer-in-Charge .Note: Sand cushioning shall be measured and paid separately under relevant item.

Supply and lay sand cushioning ,spreading, levelling as in bedding of tile, cable duct at sub station etc complete all as specified and directed

M&L for online centrifuging (filtration/ dehydration) of transformer oil including checking di-electric strength of oil before and after filtration for transformers with suitable machine having filtration, heating and pumping facility to improve the dielectric strength/ insulation value of oil complete all as specified. Notes :- (i) Di-electric strength of oil after filtration/ dehydration shall not be less than 60 KV/min. (ii) Proper shut down order shall be obtained in writing from Engineer-in-charge before commencement of the work by the contractor (iii) Ensure no wastage of transformer oil by the contractor (iv) The di-electric strength of oil shall be tested before & after filtration and test results shall be submitted to Engineer-in-Charge.

Supply and filling new transformer oil for topping up the transformers duly filtered with filtration plant having dielectric strength not less than 60 KV complete all as specified and as directed. Make : Poweroil/ Electrol/ Servo Note :- (a) The transformer oil shall be type EHV confirming to IS - 335/1983. (b) Mineral oil grade shall be used. (c) The IR value of transformer oil shall not be less than 60KV/min. (d) The unit rate shall be deemed to include the cost of filtration to achieve desired di-electric strength.

M&L for Maintenance / servicing of existing transformer of capacity up to 400 KVA including carrying out the follwing work / operations all as directed and to the entire satisfaction of Engineer-in-Charge :- (a) Opening of top plate after disconnection from HT/LT side. (b) Decaning of old transformer oil & keeping it for reuse after centrifusing to required dielectric strength as per IS schedules (c) Checking maintenance of all internal parts as HT/LT coils of all places, HT bushing, internal electrical connections, tap changing gear box. (d) Internal cleaning of tank by taking of complete coil/core of transformer outside and also cleaning of cooling tubes and make it free from sludge deposition. (e) Refilling of oil after repairs / maintenance work. (f) Change of cork Gasket of top cover. (g) Taking meggar value by applying not less than 5000 Volts meggar on HT side and not more than LT side from 500 Volts meggar & recording results. (h) Change of silica gel and glass of oil level indicator of cover both.

M&L for dismantling and removing of defective transformer ,shifting to authorised workshop for repairing, opening up and taking out coil, core and core assembly for estimation of repair and damaged parts cleaning / washing of tanks and removing the dust from all parts including cores, tanks, cooling tubes, removal of damaged parts making connection and assembling complete in all respects after repairing / replacement of coils, gasket, sheet, nuts and bolts, refilling of transformer oil, installation and testing on full load for testing for 11 KV capacity from 100 to 400 KVA complete all as specified and directed by the Engineer-in-Charge. Note for items No 34 and 35 : (a) Spare parts and winding coils as mentioned under respective items of schedule shall be measured and paid for separately as supply only and items shall be as per existing specification of original Manufacturer. (b) The Maint /service work shall be carried out in factory permises and quoted rate shall be incusive for liftings, transporting of Transformer from site to factory and back including re-installing ,testing complete.

M&L for rewinding the LT / HT side (primary winding/Secondary windings) of the transformer with copper winding (wire/strip ) of suitable gauge or to match with the existing including refixing, connecting, testing and commissioning of transformer complete all as specified.

S&F in repair HT bushing rod complete with insulator and packing suitable for out door / Indoor type 100 KVA to 400 KVA transformers confirming to IS-334 complete with nut ,bolts,brass studs and gasket of synthetic rubber bonded cork sheet all as specified and directed

S&F in repair LT bushing complete with insulator and packing suitable1100 volt grade complete with nut , bolts, brass studs, insulator and gasket etc suitable for100 KVA to 400 KVA out door/Indoor transformer. Notes for item No 37and 38: (a) Quoted rate shall be inclusive for opening of top plate of transformer / decanning of oil from transformer up the level as per requirement and assemble the same after replacement of bushing rod. (b) Bushing rod shall be replaced at site and all bushing replacement work shall be executed at site only and Transformer shall not be allowed to send to workshop at any cost .

S&F air breather complete with silica gel suitable for out door type step down power transformer up to 100 KVA to 400 KVA all as specified and directed

M&L for painting outer surfaces of transformers of capacity 100 to 400 KVA, any type / make / model, pole or plinth mounted, installed at various sub stations by spray painting with two coats of synthetic enamel paint of smoke grey colour by using spray gun including cleaning and preparing the surface of transformer for painting including writing SM / MES numbers, capacity, make, date of oil testing etc.,in paint to 5 cm height with white enamel paint complete all as specified and as directed.

Supply and fill in replacement of silica gel in transformer complete all as specified

Supply and fix in replacement of Temp gauge in transformer breather complete all as specified

S& F in repairs GI earthing strip of size 25mmx4 mm with nut and bolts complete all as specified and directed

S&F in repairs GI Strip ISI marked of size 32 mm x 6 mm fixed with nuts, bolts and washers,buried in ground including excavation if required complete all as specified and directed

M&L for Earthing complete with galvanised steel earth plate electrode of size 60cm x 60cm x 6 mm thick burried directly in ground ( earth pit not less than 2.25 m deep below the normal ground level) with top edgee of the plate not less than 1.5m below normal GL connected to GI earth strip of size 32mm x 6 mm by means of bolts, nuts, check nuts washers of GI or steel all as shown in electrical plate No-5 of SSR Part I connected to machanery / equipments installed at power house /sub station complete all as specified including testing on completion. Note (a) The unit rate shall include for excavation earth work in any type of soil ,PCC (1:3:6) type C1 earth pit , RCC 1:2:4 type B1 cover slab reinforced with 8 mm dia CTD bars @ 150mm C/C both ways,funnel with 15mm bore GI watering pipe, 20mm dia bore GI protection pipe, wire mesh and copper lugs complete all as specified in SSR Part-II 2020 (ii) Marking and writing on the earth chamber with date of test, name of machine and earth value in white enamel paint.

Surface dressing not exceeding 15cm deep and getting out in soft / loose soil complete all as specified and directed.

M&L for painting of compact sub station including VCB , Transformer , RMU and LT Panel of any size with epoxy powder coated grey colour paints, wheather proof using spray gun after throughly scrapping / cleaning the rusted portion and fixing the HT/LT Panel door properly including necessary welding as required ,hinges and locking arrengments works if necessary and miscelleneous items complete all as specified and directed by Engineer in Charge. Note :- Quoted Rate quoted shall be inclusive for writing the MES No , Name of equipment and Name of feeder complete with white enamel paint

M&L for taking out bottom trolly of HT LBS for 11 KV capacity after disconnecting power supply and carrying out servicing and maintenance of operating mechanism, latch assembly spring mechanism, checking of electrical control wiring of LBS and checking for proper functioning of shunt trip coil, lubricating of all moving parts and checking /cleaning of alignment of moving contacts with fixed contact assembly for proper functioning of operation and reassembling of bottom trolly of HT LBS fixed in its original position and testing for smooth functioning complete all as specified and as directed by Engineer-in- charge

M&L for attending repairs to existing heating system of HT VCB panel complete including replacement of unserviceable spares as required to make the heating system functional complete all as specified

M&L for painting the existing chequred plates on cable ducts in substations with one coat of bituminous paint including preparation and cleaning of surfaces complete all as directed

M&L for refilling of type fire extinguishers with 4 litrres of CO2 or dry powder chemical as per latest IS specifications complete all as specified

M&L for fabrication of fire fighting stand made out of 50X50X6mm MS angle of suitable size to accommodate and including 04 No.s fire buckets filled with dry river sand with suitable MS hooks complete alongwith MS sheet weather proof roof canopy on top of the stand of adequate size including painting with 2 coats of synthetic enamel red colour paint over a coat of red oxide primer and writing 'FIRE' on the stand as wells as on roof canopy including installation on the ground / floor with PCC embedding complete all as specified and directed.

S&F Electric shock treatment chart of size 3'X2' of laminated sheet with all matters duly printed in TAMIL, HINDI & ENGLISH languages with all signs as per IS specifications complete all as specified.

G.JANAKIRAMAN CO (BID ID -3281924)

PSK Enterprises (BID ID -3285775)

ANAND ENTERPRISES (BID ID -3282093)

G.L.THIRUMALAI NAIDU AND COMPANY (BID ID -3280898)

Global Safety Engineering and Management Solutions (BID ID -3285610)

Banyan Engineers and Contractors (BID ID -3285773)