REPAIR AND COMPREHENSIVE MAINTENANCE OF TRANSFORMER, VCB, PANEL, HT CABLE AND CONNECTED ITEMS AT AF STATION DEVLALI

Amount

Maintenance & overhauling of 33 KV draw out type VCB including opening, checking, cleaning with CTC, cleaning wiping of insulating componants, primary & secondary circuits, spouts, busbars, supports, CT, PT, cleaning contact tips, cover the expossed portion of busbar with HT tape & heat shrinkable sleeves, cleaning of bushes, spout insulators for visible crack, tightness of fasterners holding moving contacts, check & correct the buffer gap adjustment & mechanism settings, calibration of meters, testing, cleaning & overhauling of complete operating mechanism for smooth functioning, checking of control panel wiring for operation & protection for tripping & closing & rectifying the defects including replacement unserviceable wiring with ferrule & lugs, reassembling & testing of complete VCB all as directed.complete all as directed. Note: spare parts will be measured & paid separetly.

Calibration & testing of all relays fitted in control panels such as earth fault relays, over current relays fitted in HT 33 KV panels for its corrections & setting with main control panel relays & MSEDCL so that individual relay shall be tripped prior to main panel complete all as directed.

Disconnecting and Dismantling the existing indoor type, 11 KV horizontal draw out type OCB trolly of rupturing capacity 250 MVA, 400 Amps from location and repair /overhauling and setting of all relays carrying with following and all as specified and directed. (i) Inspecting/ overhauling of spring drive mechanisum by checking mechanism, hold on catch assembly,trip bridge,z srew,Cam U, Aluminum trip bridge,Main trip lever assembly and apply multy grese lubricant to function smoothly. (ii)Inspecting / overhauling of OLTLF assembly,earthfault release assembly, tripping coil, auxilary switch andchecking of electrical wiring system, (iii)Inspecting / overhauling /leaning and inspecting through insulators, moving contacts ,fixed contacts,arcing chamber by corbon cleaner solution and apply dry graphite conductive sealant for contacts to avoid corbon deposits on contact surfaces. (iv) Inspecting/Cleaning of oil tank inside and out side surface by CRC thourouly and replacement of transformer oil(60 liter for each OBC) and apply heavy duty grese for tank raising/lowering guide. (v) Assembling all items/components parts to the respective postion & testing the breaker with High Voltage and Meggering before and after high voltage test complete. Note: Spare parts and new transformer oil will be measured & paid separetly .

Disconnecting and Dismantling the existing indoor type, 11 KV horizontal draw out type VCB/ RMU trolly of rupturing capacity 250 MVA, 400 Amps from location and repair /overhauling and setting of all relays and carrying with following and all as specified and directed. (i) Inspecting/overhauling of Manual/motorised spring drive mechanisum by checking mechanism, Motor and gear assembly,Big gear assembly,Stop bolt assembly,Main shaft interlocking assembly,Closing spring assembly,Small Cam with screw,motor cut -off limit switch,Butter fly switch assembly and apply multy grese lubricant to function smoothly. (ii) Inspecting / overhauling of OLTLF assembly,earthfault release assembly, tripping coil, auxilary switch and checking of electrical wiring system incl replacement of unserviceable wiring with ferrule & lugs complete. (iii)Inspecting / overhauling /cleaning and inspecting through insulators, vacuum interupters by corbon cleaner solution and apply dry graphite conductive sealant for electrical contacts to avoid corbon deposits on contact surfaces. (iv) Re-assembling all items/components parts to the respective postion & testing the breaker with High Voltage(DC) and Meggering before and after high voltage test complete. Note: spare parts will be measured & paid separetly.

Dismantaling and overhauling and testing Potential transformer capacity 11 KV/ 110 volts AC and replacement of worn out spares such as contacts, bushing, control wiring fibre plates, gaskets , transformer oil, rewinding of damaged winding if required and applying multi grease to the mechenical parts & dry graphite conductive seaslant to contacts etc. & re-assembling the same and commissioning complete all as specified and directed. Note : Spare parts and oil will be measured and paid separatle under respective item.

Dismantaling and overhauling and testing Potential transformer capacity 33 KV/ 11KV and replacement of worn out spares such as contacts, bushing, control wiring fibre plates, gaskets , transformer oil rewinding of damaged winding if required and applying multi grease to the mechenical parts & dry graphite conductive seaslant to contacts etc. & re-assembling the same and commissioning complete all as specified and directed. Note : Spare parts and oil will be measured and paid separatle under respective item.

Supply in repair of spout insulator assembly for HT OCB 11 KV , 400 amps indoor type with current carring parts complete all as specified & directed .

Supply in repair of through insulator assembly with current carrying parts of OCB,11KV, 400Amps, indoor type and all as specified and directed.

Supply in repair of oil tank gasket for OCB,11KV,400Amps,indoor type and all as specified and directed.

Supply in repair of Baffle pot assembly suitable for OCB,11KV,400 Amps,indoor type and all as specified and directed.

Supply in repair of Set of 24 Nos.main fixed contacts with spring of OCB,11KV,400Amps,indoor type and all as specified and directed.

Supply in repair of Vacuum Interrupter Assembly with fixed contacts suitable for AREVA make HT VCB, 11 KV , 400 Amps indoor type complete all as specified & directed.

Supply & fix in repair of Battery back up power pack input 110 V, AC & output 110 v, DC with float charged SMF LA battery with indicator for ON, battery & fault, cold start switch etc

Supply & fix in repair of Step down transformer440V/ 110V (20 Amp) for 110V supply for power pack including inclusive and connected wiring complete all as specified and directed

Supply in repair of Electrical release coil 110 volt DC or 30 Volt DC

Supply in repair of V belt for spring charging motor (NEOPRENE Jacket cat No. FENNER FHP 2170 or equivalent)

Supply & fix in repair of Panel mounted multi function meter to display voltage, current,frequency, power and power factor for capacitor panel of 11 KV OCB, 110 volt complete all as specified and directed. Make HPL, emfis EMFVIFP0000 or equivalent in L & T / Havells

Supply & fix in repair of Three phase over current & earth relay, Model- MC-61A, with 3 phase O/C + E/F + High set, 50/51 RYBN, Numerical Relay, Lowest O.C-1s, Highest O/C-1hs, Lower D/F-0s, Highest E/F Ohs, all as specified and directed. Make - L&T/ Havells/ HPL

Supply & fix in repair of 11 KV, single phase, resin cast CT, Ratio 50/5, class - 1.0 insulation level 28 KV /75KV as per IS 2075 all as specified and directed.

Supply & fix in repair of brass stud 12 mm dia of suitable length for HT/LT transformer terminal with brass nut and bolts and washers 8 nos complete with oil seal, gaskets, ring washer etc for transformers including taking out existing bushings and refilling the same complete all as specified and directed.

Supply & fix in repair of brass stud 16 mm dia of suitable length for HT/LT transformer terminal with brass nut and bolts and washers 8 noscomplete with oil seal, gaskets, ring washer etc for transformers including taking out existing bushings and refilling the same complete all as specified and directed by Engr-in-Charge..

Supply & fix in repair of brass stud 20 mm dia of suitable length for HT/LT transformer terminal with brass nut and bolts and washers 8 noscomplete with oil seal, gaskets, ring washer etc for transformers including taking out existing bushings and refilling the same complete all as specified and directed.

Supply & fix in repairs strip type heater 80 watt with control wiring suitable for indoor VCB,11 KV switch gear Panel board complete all as specified and directed.

Supply & install in repairs steel tubular swaged pole type 410 SP 55 (11.0mtr long) complete with cast iron base plate, finial taper plug, bolts, nuts & screws complete all as directed.

Supply & fix in repairs indicating lamp holder with bulb LED(Red Yellow,Blue,Green) type to indicate incoming supply suitable for 24 V DC/110 VAC/230Volts AC and all as specified and directed. Make:Teknic/ C&S /L&T

Supplying and laying synthetic Rubber insulated mats 2.5 mm thick for voltage upto 11 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m.

Supplying and laying synthetic Rubber insulated mats 3.0 mm thick for voltage upto 33 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m.

Supplying standard first aid box with all the standard contents complete all as specified.

Supply & fixing in repair of breather with 500 Grams silica gel of indoor type transformer 100 to 750 KVA, all as specified & directed by.

Supply & fixing in repair of thermometer(oil temperature gauge) for indoor type transformer of capacity 100 to 750 KVA, all as specified & all as directed by Engineer -in -chare.

Taking down/ dismantiling transformer of capacity 1500 KVA,33 KV/11 KV carefully from from its original position manually or mechanically and transporting both way to work shop and installation, refixing, reconnecting after necessary repairs carried out and testing on load as directed.

Material and labour for draining out transfomrer oil from transformer tank and dismantling top cover along with conservator and 03 Nos of HT bushings,4nos of LT bushings,1no of earth bushing,HV winding connection from bushing stud and LV winding from bushings carefully. dismsantling the core connections of 1500KVA transformer,33KV/11KV from tank and taking out core along with winding from tank carefully and dismantling off load tap changer and other winding connections from top of the core carefully and all as per manufacturer specifications and as directed.

Material and labour for Dismantling the faulty HV winding carefully of transformer 1500 KVA,33 KV/11 KV from core and re- winding the HV winding with suitable size of insulated copper wire and as per manufacturers specifications and standard practice and all as directed.

Material and Labour for Dismantling the faulty LV winding carefullyof transformer 1500 KVA,33 KV/11 KV from core and re winding the LV winding with suitable size of insulated copper wire and as per manufacturers specifications and standard practice and all as directed.

Material and labour for insulated hardware and insulating material \varnishing for HV winding as insulation complete as per manufacturers specifications and standard practice and all as directed.

Material and labour for insulated hardware and insulating material \varnishing for LV winding as insulation complete as per manufacturers specifications and standard practice and all as directed.

Material and labour for re- assembling the HV winding, LV winding,off load tap changer with core of transformer 1500 KVA,33 KV/11 KV and all winding connections and core should be assembled after insulated hardware and insulating material \varnishing and ovening as per manufacturers specifications and standared practice and all as directed.

Material and labour for re- fixing the core with winding assembly of Transformer 1500 KVA,33 KV/11 KV in to the oil tank with suitable fixing arrangements and re connecting HV and LV internal connections to HV and LV bushings and replacing gaskets of bushings,bottom and top valve,top cover,conservator and replacing slica gel breather and fixing top cover with conservator as and re- assembling all parts respect to original position and re- filling of new transformer oil and filer to achieve the BDV Values and testing as per manufacturers specifications and standared practice and all as directed. (Note: transformer oil will be measured & paid separately.)

Painting of Transformer 33/11KV and 11KV/433V , indoor/outdoor type, with one coat of synthetic enamel paint over a coat of red oxide primer after cleaning, scraping, and filling of carities for out side complete including writting SM Nos and MES No on transformer body with letters with white synthetic enamelled paint complete all as per specified and as directed of the following capacity:-

1500 KVA,33 KV

750 KVA,11 KV

500 KVA,11 KV

400 KVA,11 KV

250 KVA,11 KV

160 KVA,11 KV

100 KVA,11 KV

25 KVA,11 KV

Painting of HT VCB/ RMU capacity 250 MVA,11KV, 400 Amps, with one coat of synthetic enamel paint over a coat of red oxide primer after cleaning, scraping, and filling of carities for out side surface and in side surface of VCB and all as per specified and as directed.

Painting of HT OCB capacity 250 MVA,11KV, 400 Amps, with one coat of synthetic enamel paint over a coat of red oxide primer after cleaning, scraping, and filling of carities for out side surface and in side surface of OCB and all as per specified and as directed.

Painting of HT VCB capacity 250 MVA,33KV, 400 Amps, with one coat of synthetic enamel paint over a coat of red oxide primer after cleaning, scraping, and filling of carities for out side surface and in side surface of VCB and all as per specified and as directed.

Supply & fixing of printed instruction chart for treating persons suffering from electric shock, printed in English & Hindi & Marathi and duly framed with front glasses complete all as specified.

Taking down/ dismantiling voltage stabilizer of capacity 200 KVA,415 Volts carefully from from its original position manually or mechanically and transporting both way to work shop and installation, refixing, reconnecting after necessary repairs carried out and testing on load as directed. (i) Draining out oil from Voltage stabilizer and dismsantling the core connections from tank and taking out core along with winding from tank carefully . (ii) Cleaning the oil tank of voltage stabilizer and removing sludges from tank. (iii) Dismantling the faulty winding from the core and re- winding to same with suitable size of insulated copper wire as per manufacturers specifications (iv) Core should be assembled with suitable insulated hardware and insulating material \varnishing and re- assembling all parts respect to original position and (v)Re- filling of new transformer oil and filer to achieve the BDV Values and testing complete all as directed. (Note: transformer oil will be measured & paid separately.)

Testing of dielectric strength of transformer oil of any type transformer 11KV/433 volt and 33 KV/11 KV at various location and including filteration of transformer oil by passing through filteration plant to remove moisture,impurities for improving/achieve di-electic strength to above 40 KV for 1 minut including new transformer oil for toping up & testing after filtration complete as specified.(Note: Transformer oil will be measured & paid separetly.)

Supply and Toping of transformer oil with not less than 50KV di-electric strength to any size of transformer and installed at any location( power house installation/outdoor installation) complete all as specified. Transformer oil will be supplied in sealed barrel. Make: Power /Asian/Savita/Electric.

Earthing in repair complete with galvanised steel earth plate electrode 60cm x 60cm x 6mm thick burried directly in ground vertically to a depth not less than 2.25 metre below ground level with top edge of earth plate at a depth of not less than 1.5 metre below ground level, earth plate surrounded by 15cm thick and packed layer of charcoal dust and common salt, connected to earth lead of GI Strip 32 x 6 mm fixing on wall by means of bolts, nuts and washers of the earth wire.galvanised iron or steel and thimbles and other end of the earth strip connected to earthing test point and protected by galvanised iron pipe light grade 40mm dia and water pipe 20mm dia GI light grade with funnel and wire mesh, PCC chamber in cement concrete (1:3:6) type C-2 and CI cover with frame all as shown in electrical plate No. 5 of SSR part-I all as specified and directed

Supply and fix in repair GI strip of size 25x4mm fixed on wall or floor including PVC saddles spacers and fixing screws not exc. 60 Cm apart complete all as directed .

Material and labour for fault finding on HT cables of any size and any length with fault detective machine by thumbing method and suitable high voltage and all as and directed.

Material and labour for fault finding on LT cables of any size and any length with fault detective machine by thumbing method and suitable high voltage and all as and directed.

Supply and lay in repair of HT cable XLPE Insulated screened PVC bedded, galvanized steel strip or wire armored, electric power cables (heavy duty)11000 Volts grade with stranded aluminium conductor of size 95 Sqmm 3 core and all as directed.

Supplying, jointing and testing complete outdoor type cable terminations (heat shrinkable) suitable for 3 core, 11 KV, U/G, XLPE Cable of size 95 Sqmm and all as directed.

Supply and fix cable jointing STRAIGHT THROUGH JOINT for 11KV grade cable for straight through joint complete with Jointing material (Heat shrinkable)and accessories suitable for 3 core XLPE armoured, alluminum conductor cable of size 50 to 95 sq mm all as directed.

Supply and fix cable jointing STRAIGHT THROUGH JOINT for 1100V grade cable for straight through joint complete with Jointing material (Heat shrinkable)and accessories suitable for 3.5 core XLPE armoured, alluminum conductor cable of size 50 to 95 sq mm all as directed.

M&L for PCC 1:2:4 type B1 using 20mm graded stone aggregate as in coping of poles with and including necessary form work and the exposed surface even and smooth (without using extra cement) complete incl. breaking the existing PCC coping and removing debris outside MD land complete all as specified.

M&L for PCC 1:3:6 type C2 using 40mm graded stone aggregate as in foundation of poles with and the exposed surface even and smooth (without using extra cement) complete all as specified.

Excavation in trenches not exc. 1.5m wide and not exc 1.5m depth in hard/dense soil for laying of cable/ GI pipe and getting out complete all as specified and directed..

Returning, filling in including spreading levelling watering well ramming in layers n.exc.25cm each complete all as specified and directed.

Removing surplus soil to a distance outside MD land and depositing where directed at a level n.exc 1.5m above the starting point complete all as specified and directed.

M&L for dry clean sand for cushioning of cable in trenches for cable protection including spreading, leveling and hand punning complete all as specified in SSR Part-I and as directed. Note : Only compacted thickness of sand will be measured and paid separately.

Supplying and laying un-reinforced precast concrete cable cover, class HV Type I, flat, size 300 mm x 180 mm x 40 mm. laid in trenches complete all as specified and directed.

Supply and fix in repair of GI tubing light grade 80mm dia with all fittings laid in trenches/ fixed on wall/ceiling including dismantling of old pipe etc.

Maintenance of two pole/ four pole structure including cleaning the parts and replacement of jumper, worn out insulators, greasing with silicon grease, alligning of GOD knife and tightening of GOD parts all as specified and directed.

Restringing of existing HT/LT overhead line of copper/ACSR conductor after opening of binding wire from insulator and bringing the sag within limit rebinding the same with insulator with 16 SWG aluminium wire/suitable copper wire all including renewal of jumpers by providing heavy duty alkathine pipe of approved quality, reconnecting the service connections after cleaning the carbon and foreign material complete all as directed. Note : All the tree branches obstructing to the O.H line shall be trimmed up to 3 mtr away from the O.H line. unit rate quoted shall be deemed to be inclusive of charges for the trimming of trees.

Supply and fix in repairs disc insulator porcelain, vitreous, white, brown or green insulator 145 mm height, 225 mm dia ball and socket type for 11000 volts grade all as specified.

Supply and fix in repairs post top insulator porcelain, vitreous, white, brown or green insulator for 11000 volts grade all as specified and directed.

Supply and fix in reapairs Air Break switch gang operated triple pole mechanically operated mounted on insulator and steel frame with operating mechanism and locking arrangement worked from ground level for current rating up to 200 amps,11000 volts all including fix and moving contacts, post insulators, operating rod, handle etc complete with necessary connections/ jumpers with suitable ACSR / copper conductor with heavy duty alkathine pipe all as specified by Engineer in charge

S&F in repairs expulsion / drop down fuses suitable for 11KV up to 25 Amps al as directed.

S&F in repair of ACSR squireel conductor in set of two/three/six through alkathine pipe for purpose of jumpering where directed after disconnecting the electric supply and taking all necessary precautions all as directed by Engr in charge

S&F in repairs 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 11 KV grade

Supply & fixing of notice plate made out of 1.6mm thick mild steel sheet ,vitreous enamelled paint, with write the in 3mm thick font in white colour as " NO ADMMISSION EXCEPT ON DUTY "and fixed with M.S. clamps.bolts and nuts of approved size complete all as specified & directed.

Supply & fixing of electric rubber hand gloves 11 KV complete all as directed.

Supply & fix in repairs Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp, 11 KV

Supply & fix in reapairs Air Break switch gang operated triple pole mechanically operated mounted on insulator and steel frame with operating mechanism and locking arrangement worked from ground level for current rating up to 200 amps,33000 volts all including fix and moving contacts, post insulators, operating rod, handle etc complete with necessary connections/ jumpers with suitable ACSR / copper conductor with heavy duty alkathine pipe all as specified.

Supply & fix in repairs Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp, 33 KV complete all as specified and directed.

Note : The amount against Schedule of Credit on Page No. 37 shall be deducted from the total amount quoted against Sch 'A' while deriving lum Sum for Acceptance.

NARMARAJ ELECTRICALS