REPAIRS AND MAINTENANCE OF TRANSFORMERS OF DIFFERENT CAPACITY AT DEFENCE LAB JODHPUR

Amount

Material and labour, painting of transformer indoor/outdoor type with smoke gray color synthetic enamel paint in one coat over the existing paint after cleaning and removing the durt and cleaning with sand paper complete including writing SM Nos and MES No on transformer body with letters 100 mm high with white synthetic enameled paint complete for transformer of capacity 63 to 250 KVA all as specified and as directed by Engineer-in-charge

Material and labour painting of transformer indoor/outdoor type with smoke gray color synthetic enamel paint in one coat over the existing paint after cleaning and removing the durt and cleaning with sand paper complete including writing SM Nos and MES No on transformer body with letters 100 mm high with white synthetic enameled paint complete for transformer of capacity 315 to 400 KVA all as specified and as directed by Engineer-in-charge

Material and labour painting of transformer indoor/outdoor type with smoke gray color synthetic enamel paint in one coat over the existing paint after cleaning and removing the durt and cleaning with sand paper complete including writing SM Nos and MES No on transformer body with letters 100 mm high with white synthetic enameled paint complete for transformer of capacity 1000 KVA all as specified and as directed by Engineer-in-charge

Material and labour painting of transformer indoor/outdoor type with smoke gray color synthetic enamel paint in one coat over the existing paint after cleaning and removing the durt and cleaning with sand paper complete including writing SM Nos and MES No on transformer body with letters 100 mm high with white synthetic enameled paint complete for transformer of capacity 3.15 MVA all as specified and as directed by Engineer-in-charge

Dehydration/filtration of transformer oil by means of centrifugal filtration Machine to achieve the specified dielectric strength of 45 to 60 KV at 2.5 mm gap in existing position of transformer of any capacity and transformer oil for topping up at various substation all as directed by Engr-in-Charge (NOTE: (i)Transformer oil used for TOP UP shall be measured and paid separately as supply only. (ii) Contractor has to make his own arrangement for oil filtration machine/ plant. (iii) Filtration shall be done at site when electricity supplies functional.

Disconnecting existing HT/LT connections from transformer of capacity 63 KVA to 400 KVA and drain out oil up to working level for replacement of Low tension bushing insulator with stud, nut bolts and gasket etc including opening the transformer and refixing after repairs, including changing cover gasket, checking of winding core and correcting the slackness of core, and tightening nuts, bolts, tightening neutral of the transformer of the transformer from inside refilling in transformer, positioning core properly including testing for insulation resistance etc, and making good connections and testing complete all as specified and directed by Engineer-in-charge. Note: - (i) Item rates deemed to include for proper storage or drained transformer oil and refilling. (ii) The spare parts required for repairs shall be measured and paid separately as supply only (iii) rewinding shall be measured separately.

Supply only transformer oil of approved quality ISI marked for filling in transformer for topping up/ OCB 11 KV complete all as specified and directed by Engineer-in-Charge. Note:- (i) The rates quoted by the contractor deemed to include changing and testing for dielectric strength.

Supply only breather for transformer of suitable size up to 400 KVA transformer complete all as specified and directed by Engineer-in-charge.

Supply only breather for transformer of suitable size for 1000 KVA transformer complete all as specified and directed by Engineer-in-charge.

Supply only breather for transformer of suitable size for 3.15 MVA transformer including taking out unserviceable breather complete all as specified and directed by Engineer-in-charge.

Supply only silica gel for breather of transformer of any type/capacity complete all as specified and directed Engineer-in -Charge.

Supply only oil/winding temperature indicator gauge suitable for transformer of capacity 1000KVA/3.15 MVA complete all as specified and directed Engineer-in-Charge.

M& L for disconnecting carefully electrical connection from HT/LT sides of the transformer keeping them at safe side and taking out the transformer indoor type 250 KVA,11 / .433KV step down/step up any make carrying out complete overhauling which shall complete of the following :- (a) M & L for lifting transporting handling,the transformer to workshop and opening top cover of the transformer by unscrewing nuts, bolts,washers etc including disconnecting core assy from HT/LT bushing and lifting the same gently and taking out from the shell (container/body) of the transformer. (b) M&L for 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) M&L for cleaning of the transformer body from inside, removing deposited dirt/sludge/foreign particles etc from the bottom/body of the transformer and drying/heating up the shell from inside before refilling of the transformer oil. (d) Cleaning/washing through core and windings of the tansformer by hosing down with clean dry oil conforming IS 335/983,removing deposited dirt sludge/foreign particles from the windings/core and revarnishing of the windings with super varnish including heating/drying/packing complete carefully and throughly inside the heating chamber at suitable temperature to obtained required value of insulation resistance etc all as per IS and directed by Engr-in-charge (e) Lifting and refixing core assy inside the transformer shell gently and carefully,connecting of HT/LT/Neutral connections to the bushings assy,fixing of the tap change over incl tightenting of nut,bolts,washers of the core to reduce humming noise all as directed. (f) Refilling the transformer oil in the shell of transformer only after carrying out filteration by heating upto oil 105 degree certigrade to active reqd dielectric strength and submitting the test result before and after filteration of oil in presence of Engr-In-Charge on proper performa duly signed. (g) Refixing the top cover incl replacement of cork sheet/gasket ,tightenting of nut bolt,washers etc all as directed by Engr-In-Charge. (h) Lifting/shifting to the place from where removed and reinstalling the transformer including connecting HT/LT/Neutral/Earthing connections etc all as directed by Engineer-in-charge. Note:- (i) Any damage to insulator/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) The job taken for repair/overhauling should be complete with in 03 week from the date of handing over the individual transformer,failing which necessary penality @ 1000/day after 2 week shall be imposed on firm. (iii) Rewinding / re-insulation of winding of HT/LT coil will be paid seperately under relavant item of sch.

M&L removing the damaged HT/LT coil from core carefully & rewinding of HT/LT coil with same gauge of exsisting coil with similar class of exsisting insulation complete all as specified & directed by Engineer-in-charge.

M&L Earthing complete with galvanized steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25 metre deep below ground level) with top edge of plate not less than 1.5 metre below normal ground level connected to galvanized earth strip 32x6 mm by means of bolts, nuts, check nuts and washers of galvanized iron or steel all as shown in electrical plate No 3 of MES SSR Part-I connected to main switch board or main control board all as specified and testing on completion including provision of earth strip protected by galvanized iron 40 mm dia light grade pipe and watering pipe shall be 20 mm bore light grade including all excavation and earth work in any type of soil, PCC pit with pre-cast RCC cover, charcoal/salt, funnel etc including taking out old un-serviceable earthing, complete all as directed by Engineer-in-charge. Note: (i) The concrete pit shall be PCC 1:3:6 type C-1, 40mm thick pre-cast cover slab of RCC (1:2:4) type B-1 using 20mm graded crushed stone aggregate, reinforced with 8mm TMT bars @ 10 cm c/c on both sides with suitable cast iron handle shall be provided in lieu of cast iron cover shown in electrical plate No. 3 of MES SSR Part-I., (ii) Item includes the cost of GI pipe up to 7.5m for protection of earth strip and 32X6 mm GI strip up to 7.50 m length (iii) PCC pit shall be provided at least 500 mm away from the pit and not on the earth pit itself and the extra cost of additional length of watering pipe, bends, elbow etc shall be deemed included in the unit rate.

Supply and fix 32x6mm galvanised iron strip as earth continuity conductor or main earth lead fixed to wall on batten or recess or chases or burried in ground or drawn in conduit/pipe or fixed to pole or any other indicated sitution for loop earthing etc complete all as specified and directed by Engineer-in-charge.

Dismantling unserviceable Lightning Arresters with all fittings of any description, complete all as specified and as directed by Engineer-in-charge.

M &L Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 KA , 33000V grade all as specified and directed by Engineer-in- charge.

M &L Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 KA , 11000V grade all as specified and directed by engineer in charge.

Dismantling Pin/Disc type insulators with all fittings of any description,Discharge capacity and size, complete all as specified and as directed by Engineer-in-charge.

M&L 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 Volt Grade, complete all as specified and as directed by Engineer-in-charge.

M &L Disc type insulator, porcelain, vitreous 145mm high and 255mm dia ball and socket type white, brown or green, ‘two-in-series assembly’ for tension with tension clamps for conductors, working pressure 11000 Volt, complete all as specified and as directed by Engineer-in-charge.

Fixing only 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 Volt Grade, complete all as specified and as directed by Engineer-in-charge. Note:- Workable Insulators obtained from dismantling used in this item.

Fixing only Disc type insulator, porcelain, vitreous 145mm high and 255mm dia ball and socket type white, brown or green, ‘two-in-series assembly’ for tension with tension clamps for conductors, working pressure 11000 Volt, complete all as specified and as directed by Engineer-in-charge. Note:- Workable Insulators obtained from dismantling used in this item.

Dismantling Air Break Gang operated switches,Vertical/Horizontal Mounted including insulators and operating mechanism for repair/replacement of broken/worn out component and insulators or carrying to MES store or credited to contractor, complete all as specified and as directed by Engineer-in-charge.

M & L Switch Air Break, Gang operated, Triple Pole, Mechanically Operated, mounted on Insulators and Steel Frame with Operating Mechanism worked from ground level,current rating upto 200 Amps complete all as specified and as directed by Engineer-in-charge.

M & L Switch Air Break, Gang operated, Triple Pole, Mechanically Operated, mounted on Insulators and Steel Frame with Operating Mechanism worked from ground level,current rating upto 400 Amps complete all as specified and as directed by Engineer-in-charge.

Repairs GOD and Drop out fuse unit set 9/12 insulator type complete including replacement of all UNSV jumpers, aluminium lugs, nut bolts ,changing of U clips of horizental/vertical clamps including necessary adjustment complete all as specified and directed by Engineer-in-charge.

Cleaning 11/33 KVA yard/ two pole structure/four pole structure removing of tree/ plants/grass twice during the contract period complete all as per specified and directed by engineer-in-charge

Disconnecting and taking out existing HT 33 KV VCBs (Make : ALSTOM) from housing and cleaning, rubbing and servicing the mechanical parts incl , replacement of UNSV Trip coil, Breaker charging motor ,Gear Panion, roller Switch, Big gear etc and re-assembling the same after replacement as required and ,make the VCB serviceable including making all electrical Connection and Testing ( IR Test, Continuity Test, Tripping test of earth fault and Over current of panel ) complete all as specified and directed by Engineer-in-charge. Note:- The Spare parts of VCB panel are measured and paid saperately as supply only.

Supply only Trip coil 300 Volt suitable for 33 KV VCB panel complete all as specified and directed Engineer-in -Charge.

Supply only Closed coil 300 Volt suitable for 33 KV VCB panel complete all as specified and directed Engineer-in -Charge.

Supply only Electrochemical type relay set of two O/C and one EF for 33 KV ,Auxiliary supply 30 Volt DC for VCB panel complete all as specified and directed Engineer-in -Charge.

S&F spring charge motor 230Volts AC for 33KV (ALSTOM VCB) including taking down old unserviceable spring charge motor complete all as specified & directed by Engineer-in-charge.

Disconnecting and taking out existing HT 11 KV VCBs (Make : ALSTOM) from housing and cleaning, rubbing and servicing the mechanical parts incl , replacement of UNSV Trip coil, Breaker charging motor ,Gear Panion, roller Switch, Big gear etc and re-assembling the same after replacement as required and ,make the VCB serviceable including making all electrical Connection and Testing ( IR Test, Continuity Test, Tripping test of earth fault and Over current of panel ) complete all as specified and directed by Engineer-in-charge. Note:- The Spare parts of VCB panel are measured and paid saperately as supply only.

Supply only Trip coil 110 Volt suitable for 11 KV VCB panel complete all as specified and directed Engineer-in -Charge.

Supply only Closed coil 110 Volt suitable for 11 KV VCB panel complete all as specified and directed Engineer-in -Charge.

Supply only Configureing TNC switch compatiable for 11KV VCB panel 10 Amps 440 volts complete all as specified and directed Engineer-in -Charge.

Supply only Configuring remote switch compatible for 11KV VCB panle 32 Amps 440 Volts complete all as specified and directed Engineer-in -Charge.

Supply only Solid state relay IMDT type (02 O/C +01 EF) for 11 KV VCB panel,rating 5 Amps,Auxilliary supply 30 Volt DC complete all as specified and directed Engineer-in -Charge.

Supply & Fix invertor of capacity 1 KVA including taking down old unserviceable invertor of any capacity complete all as specified and directed by Engineer-in-charge.

Supply & Fix in replacement of unserviceable maintenance free battery 24 V,100 AH initially charged complete all as specified and directed by Engineer-in-charge.

Repairs of 33KV breaker mechanically type, 400m amps, 36 KV, 3 phase, 50 Hz with shunt trip coil 110-volt DC volt 110 motor single phase 230 volt with replacement of burnt items and testing complete all as specified and directed by Engineer-in Charge. Note:-The total cost of replaced items up to 3000/- included in quoted rates.

Supply and Fix contact with insulator 800amps, 11000 Volt for 11 KV mechanically breaker panel including taking down old unserviceable contact with insulator complete all as specified and directed by Engineer-in-charge.

Supply & Fix four pole contactor 630 Amp including taking down old unserviceable contactor all as specified and directed by Engineer-in-charge.

Supply and fix in replacement of CT for 33 KV50/5 all as per existing make complete all as specified and directed by Engineer-in charge.

Supply and fix in replacement of PT of 33 KVA with ratio 33000/3 110/3 all as per existing make complete all as specified and directed by Engineer-in charge.

Repairs of 11 KVA potential transformer VEO type 133-15 with primary ratio of 11/0.11 KV three phase by replacement of burnt items and testing complete all as specified and directed by Engineer-in-Charge Note:- The total cost of replaced items up to 5000/- included in quoted rates.

Shri Electrical Enterprises