REPAIR PERIODICAL MAINT CALIBRATION OF POWER TRANSFORMER VCB RMUs TWO FOUR POLE STRUCTURE PROTECTIVE GEARS HT CABLE AND OTHER MISCELLANEOUS ELECTRICAL WORKS AT AFS JALAHALLI

Amount

Excavation in trenches not exceeding 1.5 m deep and not exceeding 1.5 m wide and getting out in soft/loose soil, complete all as specified and directed.

Excavation in trenches exceeding 1.5 m deep but not exceeding 3 m deep and not exceeding 1.5 m wide and getting out in hard/dense soil, complete all as specified and directed.

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

Removing excavated soil to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5 m above the starting point, complete all as specified and directed.

M& L for providing cement concrete 1:4:8 type D-2 (using 40 mm graded crushed stone aggregate) as in foundation filling for poles complete all as specified and directed

M&L for Providing, cement concrete 1:3:6 type C-1 (using 20 mm graded crushed stone aggregate) in roof kerbs or mud stops, rounded or chamfered on edges complete all as specified and directed.

M& L for Spreading ribbed soil in trenches as in cable cushioning all as per IS 1255-1983 and as directed. Note :- (i) Excavated approved soil shall be ribbed by using sieve to separate composite particles etc as per IS and refiiling in trenches before laying of cable 8 CM and 15 CM after laying of cable. This is than gently punned down to a depth of 10 cm above the top of upper most cable (ii) For the purpose of measurement only punned thickness only will be considered for paymet.

Supplying & laying un-reinforced precast concrete cable cover, class HV, Type 1, flat, size 300 mm x 180 mm x 40 mm laid over under ground cable for protection all as specified and as directed.

Boring of holes under road, pavement hard standings by trenches technology using ultra sound technique with suitable machineand includings HDPE pipes of 100 mm dia suitable for 0.4 Mpa working pressure complete all as speified and directed.

Dismantling steel pole / struts of any size all as directed.

Supply and fix steel tubular swaged poles complete with cast iron base plate, finial taper plug, bolts nut and screws as specified type 410 SP-55 (11.0 meters long) including two coats of aluminium paint over a coat of red oxide primer all as specified and as directed. Note : Necessary earth work excavation, removal of surplus soil & concrete shall be measured and paid separately in respective items.

Dismantling of unserviceable cross arm such as MS channel /angle section etc complete all as directed.

Material and labour for cross arms, bracings, supports, clamps and back plates, fabricated from structural steel including nuts, blots, washers, welding, bending cold or hot, drilling holes for bolts in any shape or size as indicated or directed inclusive of one primer coat, one under coat and one finishing coat of aluminum paint all as specified and as directed.

Dismantling insulators of any type and size all as directed.

S&F Pin type, composite silicon rubber polymeric type insulator 257mm height, 100mm dia for 11000 volts grade, 5 kN with ECR glass rod, forged steel top and bottom, silicon rubber housing and weather sheds, including one galvanized mild steel spindle, galvanized iron washer, spring and one galvanized iron nut all as specified and as directed.

S&F long rod insulator, composite silicon rubber polymeric type 290mm height, 100mm dia for 11000 volts grade, 45 kN with ECR glass rod, forged steel tongue and cleaves, silicon rubber housing and weather sheds all as specified and as directed.

Material and labour for pin type, porcelain vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut 150mm height, 150mm dia for 11000 volts grade all as specified and as directed.

Material and labour for disc type, porcelain vitreous, 145 mm height and 255 mm dia ball and socket type, white, brown or green single disc assembly for tension with tension clamps for conductors, working pressure 11000 volts grade all as specified and as directed.

Material and labour in replacement for danger notice plate of 1.6mm thick mild steel sheet with vitreous enamelled with letter figures and conventional skull and bones in signal red colour and fixed with MS clamps bolts and nuts of approved size for HT, 25 x 20cm all as directed and as specified.

Dismantling air break gang operated switches vertical/horizontal mounted with two or three insulators per phase including insulators and and operating mechanism for repair/ replacement of broken/worn out components all as directed.

Material and labour for switch air break, gang operated triple pole, mechanically operated (with GI operating rod), mounted on insulator and steel frame with operating mechanism worked from ground level, horizontal type for current rating upto 200 Amps on HT 11000 volts working pressure, including locking arrangement with 06 lever lock and painting the steel surfaces with two coats of synthetic enamelled paint over a coat of red oxide primer etc all as specified and as directed.

Material and labour for switch air break, gang operated triple pole, mechanically operated (with GI operating rod), mounted on insulator and steel frame with operating mechanism worked from ground level, horizontal type for current rating upto 400 Amps on HT 11000 volts working pressure, including locking arrangement with 06 lever lock and painting the steel surfaces with two coats of synthetic enamelled paint over a coat of red oxide primer etc all as specified and as directed.

Material and labour for repair and servicing of HT 11 KV Four pole structure by replacing rusted galvanized PG clamps, GI bolts and nuts, tightening of ACSR conductor of any size as jumpers including lubricating the moving parts of AB switch and cleaning of all disc /pin insulators and applying silicon compound for prevention of arcing due to dust/ salt deposits over the surfaces complete all as directed. Note: Quoted unit rate shall be inclusive PG clamp , GI hardware like nuts, bolts etc complete all as directed.

Material and labour for repair and servicing of HT 11 KV Two pole structure by replacing of rusted galvanized PG clamps , GI bolts and nuts, tightening of ACSR conductor with insulation of any size as jumpers including lubricating the moving parts of AB switch and cleaning of all disc /pin insulators and applying silicon compound for prevention of arcing due to dust/ salt deposits over the surfaces complete all as directed. Note: Quoted unit rate shall be inclusive GI hardware like nuts, bolts etc complete all as directed.

Repair / service / overhauling of gang operating devices 11000volts upto 200/400 Amps including greasing all the moving parts and applying white petroleum jelly at the contact points, tightening all nuts and bolts and prividing PG clamps 06 Nos, additional nut and bolts commissioning and testing complete including dismantling and replacing all the unserviceable parts / spares all as specified and as directed. Note : All the spares replaced shall be measured and paid separately as supply only.

Supply only moving contact blades

Supply only fixed contact jaw copper

Supply only copper braded tape (Thinner copper flexible jumper)

Supply only mild steel supporter

Supply only back connected plate

Supply only jumper carrier

Material and labour as in repair for fixing aerial fuse wire of suitable for HT 11 KV drop out fuse carrier up to 15 A rating complete all as specified and as directed.

Material and labour as in repair for fixing aerial fuse wire of suitable for HT 11 KV drop out fuse carrier up to 20 A rating complete all as specified and as directed.

Material and labour in repair for fixing aerial fuse wire of suitable for HT 11 KV drop out fuse carrier up to 30 A rating complete all as specified and as directed.

Material and labour for fixing aerial fuse wire of suitable for HT 11 KV drop out fuse carrier up to 40 A rating complete all as specified and as directed.

Dismantling of lightening arrester all as directed.

Material and labour in replacement for lightning arresters for outdoor use expulsion type suitable for 11000 volts (HT) complete with all fittings, transmission class, dis-charge capacity 65 KA, all as specified & directed.

Taking down HT 11 KV drop out fuses from 4 pole/ 2 pole structure of any capacity complete all as specified and directed.

S&F drop out fuse 12 KV, 200 Amps rating with single silicon rubber polymeric insulator complete all as specified and directed.

S&F drop out fuse 12 KV, 400 Amps rating with single silicon rubber polymeric insulator complete all as specified and directed.

Material and labour for Replacement of galvanised iron strip 32 x 6mm buried in ground or fixed on pole with all accessories including dismantling old one all as specified and as directed.

Taking down HT UG Cable of any size complete all as specified and directed.

Supply, lay, test and commissioning in replacement of XLPE insulated screened PVC bedded, galvanised steel strip or wire, armoured, heavy duty electric power cable (HT UG), 11000 volts grade with stranded aluminium conductor of size 3 core 185 Sqmm(Earthed), all as specified and as directed.

Supply, lay, test and commissioning in replacement of XLPE insulated screened PVC bedded, galvanised steel strip or wire, armoured, heavy duty electric power cable (HTUG), 11000 volts grade with stranded aluminium conductor of size 3 core 120 Sqmm ( Earthed) cable all as specified and as directed.

Supply, lay, test and commissioning in replacement of XLPE insulated screened PVC bedded, galvanised steel strip or wire, armoured, heavy duty electric power cable (HTUG), 11000 volts grade with stranded aluminium conductor of size 3 core 95 Sqmm ( Earthed) cable all as specified and as directed.

Material and labour for cable jointing kit in replacement for 11KV (Earthed) grade cable for outdoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to185 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

Material and labour for cable jointing kit in replacement for 11KV (Earthed) grade cable for outdoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

Material and labour for cable jointing kit in replacement for 11KV (Earthed) grade cable for indoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

Material and labour for cable jointing kit in replacement for 11KV (Earthed) grade cable for indoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

Material and labour for cable jointing kit in replacement for 11KV (Earthed) grade cable for out door straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

Material and labour for cable jointing kit in replacement for 11KV (Earthed) grade cable for out door straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

M&L for preparation of old painted steel surfaces of 4 pole structure including brackets, clamps, channels and cross arms by cleaning of oils, lubricants, grease etc. complete above PCC coping and applying two coats of aluminium paint on surfaces 1m above PCC coping, applying two coats of synthetic enamel paint in zebra pattern with black & yellow colour combination up to 1m height above PCC coping; writing MES No. of poles (Number size shall be 25mm and lettering shall be 40mm) complete including applying two coats of white wash on exposed concrete surfaces of coping to poles duly preparing the surfaces all as directed.

M&L for preparation of old painted steel surfaces of 2 pole structure including brackets, clamps, channels and cross arms by cleaning of oils, lubricants, grease etc. complete above PCC coping and applying two coats of aluminium paint on surfaces 1m above PCC coping, applying two coats of synthetic enamel paint in zebra pattern with black & yellow colour combination up to 1m height above PCC coping; writing MES No. of poles (Number size shall be 25mm and lettering shall be 40mm) complete including applying two coats of white wash on exposed concrete surfaces of coping to poles duly preparing the surfaces all as directed.

M&L for preparation of old decorated surfaces of walls of transformer plinth and applying one coat of cement based paint all as specified.

M&L for cable route indicator made of cast aluminium disc 200mm dia, with inscription of HT cable fixed to MS angle of size 40x40x6mm, 600mm long with bolts & nuts, duly grouted in PCC 1:3:6, type C2 complete including necessary excavation and earth work all as directed including taking up existing indicators.

Supply and fix galvanised iron tubing light grade 100mm bore galvanized with all fitting laid in trenches / road crossing for UG cable protection all as specified and as directed.

Material and labour for jumper connections between GOD and drop out fuses and transformers with ACSR conductors of suitable size and length (Weasel) including necessary lugs wherever required / aluminium heavy duty PG clamps / binding properly without any loose contact after removing the old jumpers including PVC sleeves all as specified and as directed.

Material and labour for repairs to transformer at locations where installed after removing nuts and bolts of transformers of capacity 100 to 200 KVA and taking out the leaked portion such as bushes, joints and replace the gaskets after cleaning the suface and refixing the nuts & bolts and ensure no leakage all as specified and as directed. Note: (i) The quoted unit rate shall be included making necessary arragements to remove the oil in the conservator/ up to the level of the portion to be opened in safe drums and refilling after the repair works. (ii) The tranformer repair works shall be carried out only by engaging specialised and experianced technicans. (iii) The oil shall be filtered before refilling if found required. The charge for filteration will be measured and paid separately rate quoted shall deemed to be included the cost of spares such as cork sheet gasket, nut/bolts and washers.

Material and labour for repairs to transformer at locations where installed after removing nuts and bolts of transformers of capacity 250 to 400 KVA and taking out the leaked portion such as bushes, joints and replace the gaskets after cleaning the suface and refixing the nuts & bolts and ensure no leakage all as specified and as directed. Note: (i) The quoted unit rate shall be included making necessary arragements to remove the oil in the conservator/ up to the level of the portion to be opened in safe drums and refilling after the repair works. (ii) The tranformer repair works shall be carried out only by engaging specialised and experianced technicans. (iii) The oil shall be filtered before refilling if found required. The charge for filteration will be measured and paid separately rate quoted shall deemed to be included the cost of spares such as cork sheet gasket, bushing ,nut/bolts and washers.

Material and labour preparing old faded painted surface of 11 metre long steel tubular pole complete with including all accessories such as cross arms bracings, brackets etc, and applying two coats of aluminium paint including writing pole number with paint same as existing all as specified and as directed.

M&L for rewinding of HT coils / LT coil of transformer with super enameled copper wire / strips to match with existing gauge or as recommended by the manufacturer for turn ratio and impedance including requisite paper / insulation material in each layer of winding complete all as specified and as required.

Filtration of transformer oil of transformers installed at various locations to achieve di-electric strength not less than 60 KV for 1 minute at 2.5 mm 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. Note :- (i) The rate quoted shall be deemed to include for taking necessary conections to filteration plant from transformer and switch gear oil duly removing the inlet and out let connections. (ii) Electric supply for the filteration plant will be made available free of cost. (iii) The dielectric strength value of the transformer oil shall be tested before & after filtration. And such testing shall be carried out twice in a year as specified and directed. (iv) Test reports shall be enclosed at the time of payment.

Supply and topping up or replacement of transformer oil with di-electric strength not less than 60 KV in to the conservator tank/ body tank of the transforme etc at various locations complete all as specified and as directed.

Material and labour for replacement of silica gel breather assembly for HT distribution transformers of 100 KVA to 400 KVA capacity including dismantling old one all as specified and as directed

Material and labour for replacement gun metal drain valves of transformers from 100 KVA to 315 KVA capacities including dismantling old one all as specified and as directed.

Material and labour for replacement of the LT porcelain bushings complete of transformer from 100 KVA to 200 KVA capacity distribution transformers of existing transformer make/ size/ type including dismantling old one all as specified and as directed .

Material and labour for replacement of the LT porcelain bushings complete of transformer from 250 KVA to 400 KVA capacity distribution transformers of existing transformer make/ size/ type including dismantling old one all as specified and as directed .

Material and labour for replacement of the HT porcelain bushings complete of Transformer from 100 KVA to 200 KVA capacity distribution transformers of existing transformer make/ size/ type including dismantling old one all as specified and as directed .

Material and labour for replacement of the HT porcelain bushings complete of Transformer from 250 KVA to 400 KVA capacity distribution transformers of existing transformer make/ size/ type including dismantling old one all as specified and as directed .

Material and labour for replacement of the LT bushing rod made out of gun metal with threading & of suitable length/ size all as per existing including metal rings/ bolts/ washers/ rubber rings etc. complete from 100 KVA to 200 KVA capacity distribution transformers of any make/ size/ type including dismantling old one all as specified and as directed

Material and labour for replacement of the LT bushing rod made out of gun metal with threading & of suitable length/ size all as per existing including metal rings/ bolts/ washers/ rubber rings etc. complete from 250 KVA to 400 KVA capacity distribution transformers of any make/ size/ type including dismantling old one all as specified and as directed

Material and labour for replacement of the HT bushing rod made out of gun metal with threading & of suitable length/ size all as per existing including metal rings/ bolts/ washers/ rubber rings etc. complete from 250 KVA to 400 KVA capacity distribution transformers of any make/ size/ type including dismantling old one all as specified and as directed

Material and labour for replacement of the HT bushing rod made out of gun metal with threading & of suitable length/ size all as per existing including metal rings/ bolts/ washers/ rubber rings etc. complete from 250 KVA to 400 KVA capacity distribution transformers of any make/ size/ type including dismantling old one all as specified and as directed

Material and labour for replacement of Oil Temperature indicator(OTI) suitable for 100 to 400 KVA capacity distribution transformers including dismantling old oneall as specified and as directed.

Material and labour for preparation of old painted surfaces of transformers with coarse cloth/ brush and painting throughout externally on exposed surfaces with two coats of smoke grey colour synthetic enamel paint or approved colour as directed including writing of SM/MES Number on transformer and transformer details on plinth in white enamel paint on black enamel paint back ground complete including one coat of white wash for base foundation all as specified and directed for 100 to 400 KVA capacity indoor / outdoor type transformer

Supply only for the Shunt trip coil 110 V DC/220 V DC /30 V DC suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items

Supply only the current transformer of ratio 100/01 suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items, all as specified and directed.

Supply only the space heater as per existing fitted in HT VCBs suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items, all as specified and directed.

Supply only the Trip Free Mechanism suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items, all as specified and directed.

Supply only the Closing coil suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items, all as specified and directed.

Supply only the Auxilary switch 4 NO + 4 NC suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items, all as specified and directed.

Supply only the TNC switch suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items, all as specified and directed.

Supply and fix Vacuum Interrupter bottle suitable for400 to 800 Amps Vacum cicuit Breaker frequency 50 Hz as per site requirement all as specified & directed .

Supply only the Indication lamps suitable for 400 to 800 Amps 250 MVA to 450 MVA HT switch gear (VCBs) and 11 KV HT panel repair work under above schedule items, all as specified and directed.

Material and labour for three phase PT of ratio 11000/110V, burden 100VA, class 1.0, voltage factor 1.2 countinuous confirming top IS -3156/1992 including fuse unit disconnecting carefully HT electrical connection from PT and taking out the old unserviceable PT and connecting carefully electrical connection testing complete all as specified.

Calibration of Earth fault relay ( Electro Mechanical), setting the relays for the fault levels as directed and testing the operation of Vacuum circuit breaker after calibration of relays by simulating different types of faults all as directed. Note: Work should be carried out by service engineer of OEM .

Calibration of Over Current relay (Electro Mechanical) , setting the relays for the fault levels as directed and testing the operation of Vacuum circuit breaker after calibration of relays by simulating different types of faults all as directed. Note: Work should be carried out by service engineer of OEM .

Repair and servicing of HT 11KV out door type Ring main unit (RMU) of capacity 400 Amps by opening and replacing all unserviceable parts, cleaning and tightening the terminals, checking the control circuit wiring, spring charging and interlocking mechanism and ascertaining the RMU healthiness for faults tripping system by using secondary injection method and checking breaker, closing coils, checking the tripping circuit and resetting trip values of relays and checking tripping machanism including servicing of the LBS complete by engaging well experienced technicians as per manufacturer recommendation and all as directed. Note: (i) The rated quoted shall deemed to be inclusive of minor spares such as screws, bolts, nuts and all consumables. (ii) Spare parts shall be measured and paid separately as Supply only.

Supply only Bushing 400 Series Bolted Type suitable for 400 Amps HT RMUs

Supply only Trip coil as per the existing make and type suitable for 400 Amps HT RMUs

Supply only Push Button Green/Red W/ Label "O" suitable for 400 Amps HT RMUs

Supply only Spike Mechanism w/o hex rod suitable for 400 Amps HT RMUs

Supply only Capacitor Unit, VPIS, 9-15kV without cord suitable for 400 Amps HT RMUs

Repair and servicing of HT 11KV LBS of capacity 400 Amps by opening and replacing all unserviceable parts, cleaning and tightening the terminals, checking and greasing of charging mechanism and fault tripping system including servicing of the LBS complete by engaging well experienced technicians as per manufacturer recommendation and all as directed . Note: (i) The rated quoted shall deemed to be inclusive of minor spares such as screws, bolts, nuts and all consumables. (ii) Spare parts shall be measured and paid separately as Supply only.

Supply only High repturring capacity fuse unit upto 400 Amps as per sample and suitable for housing in Megawin make suitable for 400 to 630 Amps HT out door Load Breaking Switch unit

Supply only Operating mechanism spring suitable for 400 to 630 Amps HT out door Load Breaking Switch unit

Supply only Trip Coilsuitable for 400 to 630 Amps HT out door Load Breaking Switch unit

Supply only Fuse holder assembly ssuitable for 400 to 630 Amps HT out door Load Breaking Switch unit (Make Meghawin)

M&L for defect rectification in HT 11 KV cable laid in trenches by locating fault with the help of electronic fault locator machine comprising of surge generator pulse ECHP fault location with high frequency distance calculator etc. including excavation in any type of soil strata exposing the cable fault removal of deteriorated position of cable treating of cable and keeping the same ready for jointing work for cables of size upto 300 Sqmm 3 core complete all as specified and as directed. Notes - (i) The contractor shall bring the fault locating equipment at site with in 02 hours of instructions received from Engineer -in- charge and he shall ensure that the fault is rectified with in 24 hours of receipt of intimation from Engineer-in-charge failing which recovery of Rs. 500.00 per hour shall be recovered from the contractors dues w.e.f the time immediately after the expiry of 24 hours duration. (ii) For the purpose of payment one unit of “Each job” shall comprise of detection of faults in a particular stretch of cable which are identified in that particular stretch, irrespective of number of defects / faults in that particular stretch which are detected during fault detection and the contractors unit rate quoted shall be deemed to include for the same and all such defects / faults which are detected in that particular stretch shall be considered as one unit. (iii.) Joints, jointing materials and cable required shall be measured and paid for separately.

Supply and fixing in replacement of battery 2 volt 12 AH complete all as specified and directed.

Supply and spreading stone aggregate of size not exceeding 40 mm spread and leveled in layers not exceeding 15 cm to a true surface of broken stones for transformer and pole structure area all as directed

Supply and fixing as in repair HT tape roll 35mm width and 5 mtr length roll, all as specified and directed.

M&L for Chequred PVC mat of 1100 Volts grade of size 2.0x 0.9m and thickness 12mm with ISI marked Complete all as Specified and as directed.

M&L for Earthing complete with galvanised steel earth plate electrode of size 600 x 600 x 6 mm thick burried directly in ground vertically to a depth not less than 2.25 mtr below ground level with top edge of plate not less than 1.5 m below ground level connected to and including galvanised earth strip of size 25X4 mm (up or 7.5 mtr length) and GI pipe 40 mm light grade for protection of GI earth strip by means of bolts, nuts, checknuts and washers made out of galvanised iron and connected to earth test point as shown in electrical plate No. 3 of SSR Part-1-2009 and as specified or indicated and testing on completion including excavation and earth work any in type of strata available at site, PCC (1:3:6) type C-1 for earth chamber, precast RCC slab 50mm thick in cement concrete (1:2:4) type B-1 reinforced with welded steel wire fabric (xpm) weight not less the (4kg/sqm) funnel with GI watering pipe of 20mm bore medium grade, wire nuts and lugs complete all as speified and directed.

Surface dressing in hard / dense soil not exceeding 15 cm deep and clearing all the grass weeds etc in the sub station yards after removing stone aggregate aside all as directed at site including setting / spreading back the aggregate complete all as specified and directed at site. Note:- (i) Additional stone aggregate required shall be measured and paid separately under relevant items of this schedule. (ii) The rate also deemed to be included for labour (iii) All the sub station yards shall be kept clean through out the contract period by removing the grass/weeds as many as times required depending on the growth of the grass. (iv)The rates shall be deemed to includes clean the cost of removing two time the grass,weeds,debris,excess soil etc to a distance not less than 50 M and keeping the excavated surface clean and levelled all as directed.

Material and labour for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking out the transformer indoor/ outdoor type of capacity 100 KVA to 400 KVA, 11 KV/ 0.433 KV, step down any make for carrying out complete overhauling which shall comprise of the following:-

(a) Lifting, transporting, handling, the transformer to workshop 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 and taking out from the shell (container/ body) of the transformer. (b) Draining out transformer oil from the above said transformer in the suitable capacity of container /drums and keeping it in safe custody for reuse. (c) Cleaning the transformer body from inside, removing deposited dirt/ sludge/ foreign particles etc. from the bottom/ body of the transformer and drying up the shell from inside before refilling of the transformer oil. (d) Cleaning and washing thoroughly core and windings of the transformer by hosing down with clean dry oil conforming to IS 335/1983, removing deposited dirt/sludge/foreign particles from the windings/ core, thorough inspection of windings, providing insulations to leads and terminals, 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.

(e) Lifting and refixing core assembly inside the transformer shell gently and carefully, connecting primary/ secondary/ Neutral connections to the bushings assembly, fixing of tap change over including tightening of nuts, bolts, washers of the core to reduce humming noise all as directed. (f) Refilling the filtered transformer oil in the shell of transformer complete. (g) Refixing the top cover including replacement of cork sheet/ gasket 8mm thick, tightening of nuts/ bolts/ washers etc. and replacement of breather with silica gel crystal type all as directed. (h) Lifting/ shifting to the place from where removed and re-installing the transformer including connecting primary/ secondary/ neutral / earth connections etc. all as directed.

(j) 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 transformer shell complete all as directed. (vi) Inspection of tap changer, checking the moving and fixed contacts for contact wear and connection to winding.

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 confirmed by the contractor before taking into his custody. (ii) M&L for rewinding re-insulation of HT/ LT (primary/ secondary) coils, bushes, studs, Transformer oil,cable box, replacement of buchholtz relay/ MOG if any etc will be measured and paid separately.

Repair and serviceing of HT switch gear (Vacuum circuit breaker ) of capacity 400 to 800 Amps, 11 KV 250 to 450 MVA and strip opening the HT panel of rating 11 KV, 3 phase 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. (c) Servicing/Inspecting/checking of circuit spout and cicuit spout connections for RYB phases and replacement of spares if required. (d) 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.

(e) 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. (f) Servicing/Inspecting/checking of secondary sockets/busbar earthing plugs/earthing sockets and replacement of spares if required. (g) Checking, setting and adjustment of lowering and raising operation of the breaker trolley. (h) 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. (j) Dismantling the complete instrument chamber/ HV cable box/LV cable box .Decarbonising/ cleaning the complete HT 11 KV 3 phase independent bus bar, bus bar chamber of HT panel and inspecting the bus bar insulators.

(o) 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, minor spares like nuts, bolts, washers, gasket, insulation tape, lugs, compound, copper wire etc. to put in to the VCBs /HT panels in serviceable condition, testing and commissioning all as specified

devan enterprises (BID ID -3095978)