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| 1 | Material and labour for preventive maintenance/servicing of power transformer (outdoor type) of capacities 2 MVA, 3 MVA, and 5 MVA and 2.5 MVA including disconnecting incoming and outgoing connections, ensuring safety isolation, servicing and cleaning of internal parts, checking and tightening all electrical/mechanical connections, performing megger testing (IR values for HV/LV windings & winding-to-earth), checking oil level and condition (visual inspection and BDV test), external inspecting of gaskets andbushings, removing carbon deposits from connections and joints, functional testing of protective relays (Buchholz, Pressure Relief, Temperature gauges), carrying out minor repairs and repair of leakage i.e replacement of gland/change of brass nut/bolts andre-assembling the transformer after repairs,checking of earthing connections, conducting tests, recording all parameters, and preparing a service report, complete all as specified and directed; after servicing cable laid complete to the satisfaction of the Engineer-in-Charge/GE(a) Voltage ratio test (b) Magnetization Current Test(c) Voltage balancing TestNOTE :- (i) The contractor shallproduce test certificate against above tests from ser no (a) to (c) from the certified firm.(ii) The cost of dismantling and assembly is deem to be including.(iii) work to be carried out by qualified personael to ensure safe and reliable operation. Preventing maint/servicing of transformer will be carriedout by any equipment manufacture/certified firm and work to be carried out as per IS recommendations complete in all respect. All test perameterand service report shall be submitted by contractor. |
| 2 | Dehydration/ filtration of transformer oil of existing transformer installed at site with portable plant to improve the dielectric strength 50 KV during filling after initial filtration including testing of dielectric strength after dehydration at siteNOTE :- (i) All arrengement of DG set of suitable capacity of electric supply for running of dehydration plant, T&P and other items required will be arranged by contractor and deem to be included in the cost of dehydration/filtration and nothing extra on this account will be admissiable. Any damage after filtration shall be solely responsible of Contractor & same shall be repaired without any additional cost. (ii) Dehydration report will be submitted by the contractor. (ii) Tthe result is not desirable payment will not made to the contracor |
| 3 | Supplying, filling dehydration and filtration of new transformer oil for toping up/replacement of transformer oil having dielectric strength not less than 60 KV(rms) with gap of 2.5 mm all as conforming to IS 335 of 1993 complete all as specified and directed by Engineer-in-Charge. |
| 4 | Material and labour for replacement of worn out bushing rod made out of brass with heavy duty three nuts and three washer at both ends suitable for HV side all as perIS 3347-5-2 (1979)shape, dia and length suitable for 2 MVA to 5 MVA capacity transformers :- |
| 5 | Material and labour for replacement of worn out bushing rod made out of made out brasswith heavy duty with nuts and washer at both ends suitable for LVsideall as exiting size, shape and length suitable for2 MVA to 5 MVA transformers :- |
| 6 | Material and labour for replacement of worn out porcelain bushing for 33KVside indoor /outdoor transformers with rubberised cork sheet washers 4mm thick all as required at site and as directed by engineer in charge suitable for2 MVA to 5 MVA capacity transformers:- |
| 7 | Material and labour for replacement of worn out porcelain bushing for 11KVside indoor /outdoor transformers with rubberised cork sheet washers 4mm thick all as required at site and as directed by engineer in charge suitable for 2 MVA to 5 MVA capacity transformers:- |
| 8 | Material and labour for replacement of worn out rubberised cork sheet 4 mm thick for transformer top cover all as required at site and as directed by engineer in charge suitable for 2 MVA to 5 MVA capacity transformers. |
| 9 | M & L for Preparation of old surface of transformer for painting externally including fins/radiators removal of all rust/oil/grease and unwanted material and then two coats of synthetic enamel metallic paint by means of spray gun at site of installation of transformer alongwith writing SM No complete all as specified and directed by engineer in charge suitable for 2 MVA to 5 MVA capacity of transformer. |
| 10 | Material and labour for replacement of worn out silica gel breather assembly including silica gel all as per existing sample suitable for2 MVA to 5 MVA capacity of transformers of any make. |
| 11 | Supply and fix in replacement of Buchholz relay of transformer capacity 2MVAtype GOR 2 including gaskets, and associated fittings,reconnection of alarm & trip circuits, terminal tightening,functional testing of Buchholz relay alarm & trip operation with all equipment required at site complete all as specified and directed by Engr-in-Charge. |
| 12 | Supply and laying and connectingarmoured copper cable size 2.5 sqmm 12 core completeall as specified and directed by engineer in charge. |
| 13 | M & L for Shut down, isolation, and safety precautions for 33 kV panel, tagging & earthing before workServicing of 33 kV VCB,opening breaker, inspection of moving & fixed contacts, checking wear level, cleaning & lubrication of mechanism andoverhauling of mechanism assembly ,dismantling, greasing, replacing worn-out springs, checking linkages, alignment,Cleaning of breaker & panel interior with electrical-grade chemical cleaning agents to remove dust, carbon, and moisture, Tightening of all control wiring & busbar connections with torque wrench as per specifications, Testing & functional checks forbreaker closing/opening, trip coil operation, interlock verification andcleaning, reassembly & commissioning of VCB and panel including consumables i.eleaning chemicals, lint-free cloth, lubricants, minor fasteners and conduct timing test, CRM test, insulation resistence test of VCB. Calibaration and adjustment of vaccum circuit braker all as specified, the test report shall be pasted on VCB with mention all perameter i.e. setting time, date, etc as directed by Engr-in-Charge.Note-:(i)The work to be carried out by qualified personael to ensure safe and reliable operation. Preventing maint/servicing and calibaration of VCB will be carriedout by any equipment manufacture/certified firm and work to be carried out as per standrded and relevent IS/IEC guidelines complete with test report submissionin all respect. All test perameter service and report shall be submitted by contractor. (ii) The cost of spare partwill be paid separetley. |
| 14 | Supply and fix insulaors in replacementfor 33 KVVCBs Breaker including all acessories complete as secified and directed |
| 15 | M&L in replacement of triping/ closing coils suitalbe for 33 KV VCB Make : CG |
| 16 | S & F in replacementof epoxy resin spouts bushing for VCB complete all as specified and as directed |
| 17 | S & F in replacementof heater as per existingtype in VCB33KV complete all as specified and as directed |
| 18 | Supply & Fixing in replacement ofdigital volt meter flush mounted class - 1.0, size as per old complete |
| 19 | S&F in replacement of digital Amps meter mounted flush mountedclass - 1.0, size as percomplete |
| 20 | S&F in replacement of digital Multimeter mounted flush mountedclass - 1.0, size as percomplete |
| 21 | S&F in replacement of hooter in existing remote panel complete |
| 22 | S&F in replacement single vaccum interrupter for 33 KV VCB50Hz compatiable to existing 220-320 V automatic typecomplete |
| 23 | S & F in replacement of Digital protective relays comprising of 3 Phase, over current plus earth fault relay with high and low set operational with 24 volt to 110 volts AC / DC campatiable to existing 33KV VCB complete wiring with suitable size wire as per existing and fixing arrangement complete as secified and directed. |
| 24 | S&F as in replacementDigital protective relays comprising of under / high voltage relay with with high set operational with 24 volt to 110 volts AC / DC campatible to existing 33 KV VCBincluding complete wiring with suitable size wire as per existing and fixing arrangement complete as secified and directed. |
| 25 | M&L in replacement of triping/ closing coils suitalbe for 33KV VCB. |
| 26 | Supply and fix horizontal Rotating type air break gang operated 400/600 Amptripple pole, mechanically operated, outdoor type with all fittings, accessories, mounted on and including HT 33 KVporcelain insulators and steel channel frame GI Operating rod 25 mm dia of suitable length worked from ground includinglocking arrangements, with 7 livers Naval brass lock, suitable for 200 Amps current rating complete. |
| 27 | Supply and fix HT 33 KV outdoor non-linear type lightening arrestor with mountings, accessories complete fixed on cross arms of two pole structure/GI flat strip and connect with same size of ACSR conductor encased in PVC alkathine pipe with all fittings connected to earth stripwith nut, bolt, washer transmission class having discharge capacity of 65 kilo Amps and suitable for workingpressure complete all asspecified and directed complete. (Set of three) |
| 28 | Disconnecting and taking out existing U/S potential Transformer (PT) of any description and from any position and supply, installation, testing and commissioning of cast resin type 33 KV, single phase, out door oil cooled PT of ratio 200-100/5-5 V having protection core class 1.0 / 5P10, burden 15 VA and installation level 70 KV/170 KV as per IS 2075 all as specified and directed. Make:Crompton greaves/Jyoti/Skipper/Kappa/ Alstom(Ariva) |
| 29 | Disconnecting and taking out existing U/S Current Transformer (CT) of any description and from any position and supply, installation, testing and commissioning of cast resin type 33 KV, single phase, out door oil cooled CT of ratio 200-100/5-5 Amp having protection core class 1.0 / 5P10, burden 15 VA and installation level 70 KV/170 KV as per IS 2075 all as specified and directed. Make:Crompton greaves/Jyoti/Skipper/Kappa/ Alstom(Ariva) |
| 30 | M&L earthing including testing on completioncomplete with galvanized steel plate electrode 600 mm x 600 mm x 6 mm thick, burried directly in ground vertically in pit of depth not less than 2.25 metre below normal ground level with top edge of the earth plate at a depth not less than 1.5 metre below normal ground level and coveredsurrounded from all sides with mixture of charcoal and common salt in alternate layers upto 15cm above top of plate and electrode connected to galvanized iron strip 32 x 6 mm size by means of GI bolts, nuts, check nuts and washers, earth strip protected by galvanized steel pipe 40 mm bore (light grade) connected to main switch board or any other electrical equipment all as shown in electrical plate No. 3 of SSR-2009 Part I and includingnecessary excavation and earth work in any type of soil, 20 mm bore medium grade GI pipe for watering, funnel with wire mesh, PCC (1:3:6), type C-1 chamber (chamber size not less than 300x300x300mm interier diamentions), 50 mm thick cover RCC (1:2:4), type B-1, reinforced with 6 mm dia MS round bars @ 15cm c/c both way for cover and 50x50x5 ISAMS frame etc, complete all as specified.NOTE: (i) The unit rate includes earth strip and new GI protection pipe upto (maximum 7.5 metre from earth plate) earth point/test point. (ii) If test result are not satisfactory that is not less than 5 ohm, the entire earthing shall be re done without any extra cost |
| 31 | All as per Item No-31 above but Copper electrode 600mmx600mmx3mm thick and copper strip 25mmx3mm thick .Test result should be less than 3 ohms. |
| 32 | Supply and fixing of cable jointing kit 11 KV (earthed) grade cable for indoor Terminal with long sleeves (Heat shinkable) type joint complete with jointing material and all accessories for 3 core XLPE armouredaluminium conductor cable of size 120 to 185 Sqmm sqmm complete all as specified and directed. |
| 33 | Supply and fixing of cable jointing kit 11 KV (earthed) grade cable for Out door Termination (heat shrinkable) type joint complete with jointing material and all accessories for 3 core XLPE armouredaluminium conductor cable of size 120 Sqmm to 185 Sqmm complete all as specified and directed. |
| 34 | Supply only rubber matting approx size 2 mtr x 1 mtr x 20 mm thick, 1100 volts, PVC ISI marked all as directed. |
