REPAIR/ MAINTENANCE OF DISTRIBUTION TRANSFORMER, OIL FILTERATION AND ALLIED WORKS AT GE DRONACHAL BHOPAL

Amount

Strip opening of transformer of capacity 100 to 200 KVA, 11 KV /433 volts indoor /outdoor type of any make after unscrewing nuts & bolts, screws and connected, dismantling carefully connected acesories and removing primary and secondary terminals, top cover, conservator tank, temp gauge,breather,neutral earth strips and draining out transformer oil to the required level and storing carefully in cleaned containers ( to be arranged by contractor) etc. for replacement of defective parts such as replacement of leaking gaskets, replacement of worn out/burnt out studs, checking and cleaning of contacts of tap changer and re-assembling the transformer after replacing the defective parts/repair complete all as directed.

Notes for ser item No. 1.00:- (i) Payment of defective parts to be replaced shall be measured and paid for separately under respective item of this schedule. (ii) The cost for replacement of packing material such as 5 mm thick rubberised cork sheet top gasket, insulator’s gasket shall deem to be included in the unit rate quoted by the contractor against this item (iii) The repair/strip opening of transformers shall be carried out at site of its installation without taking down/removal of transformer from the site of installation..

All as per item No 01 here in before but transformer of capacity 250 KVA and up to 750 KVA complete all as specified and directed

Filtration/Dehydration of transformer oil of transformers installed at Dronachal Campus Sub station to achieve die electric strength 60 KV at 2.5 mm gap gap as per relevant IS with portable filtration plant, testing of the oil for die electric strength, break down voltage before filtration and after filtration complete all as specified and directed. (MRS Sub Station) Note : (All types of T&P required for filtration of transformer to be provided by the contractor).

Supply and topping up fresh transformer oil for die electric strength of 40 KVA at 4 mm gap conforming to IS -335/1993 in the conservator tank/body tank of the transformer at various locations of Dronachal campus sub station complete all as directed Note :New oil shall be supplied in factory sealed container only.

Taking out old unserviceable defective HT bushings from transformers and Supply and fix porcelain bushing with brass studs, nuts and washers connecting to winding, testing and commissioning of transformer 100 KVA to 750 KVA capacity complete all as directed .

Taking out old unserviceable defective LT bushings from transformers and Supply and fix porcelain bushing with brass studs, nuts and washers connecting to winding, testing and commissioning of transformer 100 KVA to 750 KVA capacity complete all as directed .

Taking out old unserviceable drain cocks from the transformers and Supply and fix new gun metal gate valve of following size bore along with brass/ gun metal dummy cap with rubbber washers as required at site complete all as directed

Supply and replace in repair pressure release valve suitable for transformer of size upto 750 KVA installed in Dronachal sub station complete all as specified and directed

Supply and replace silica gel into the breather of transformers complete all as specified and directed

Supply and replace silica gel breather assy complete suitable for transformer of capacity 100 KVA to 750 KVA complete all as specified and directed

Supply and replace 32mm x 6 mm GI strip as in earth continuity conductor fixed to wall or pole or recess or cheses or burried in ground or drawn in conduit pipe or any other indicated situation for loop earthing etc as required all as directed

Disconnecting the unsv transformer HT 11/0.433 KV, upto 750 KVA from any Electrical sub station in Dronachal campus including disconnecting of HT jumper, outgoing LT cables, earth load GI strip etc, complete and loading on transportation vehicle with crane and manpower and transporting to workshop. The following jobs are included to be done in workshop:-

Removing the existing burnt out complete (HT/LT side) winding without damaging the core and rewinding both primary and secondary windings with appropriate gauge of copper wire conductor annelid and super enameled and number of turns as per manufacturer recommendation including insulation materials as required. Rewinding of both HT & LT coils shall be measured and paid for separately under respective item of this schedule.

Drained out the existing transformer oils and stored in suitable size MS Drums arranged by the contractor and after repair/maint making the dehydration up to the dielectric strength of 40 to 60 KVA including top up with new transformer oil and servicing of breather etc.

Removing the existing burned out complete Tap changer and fixing of new tap changer as per the manufacturer recommendation.Tap changer shall be measured and paid seperattely

Cleaning inside of the transformer properly by removing the burnt out particles and oil sledge etc and painting of transformer completely.

Installing the winded cores inside the transformer body and connecting the HT & LT loads with appropriate sides. Reassembling the transformer with replacement of 6 mm thick gasket bolts nuts and washers and replacement of 03 Nos post insulators complete all as specified and directed.

Transporting back to work site (Original site) from Workshop, lifting from transport vehicle with crane and manpower, installing at existing pole mounted/Transformer plateform connecting electrically and testing complete all specified and directed.

The said transformer shall be repaired in reputed workshop as decided by the GE.

Testing of transformer after repair shall be carried out with all test and the cost of testing shall deem to be included in unit rate quoted against this item

If defective transformer not deliver within 15 days after repair then this item will become inoperative & penality will be charged at the rate of 1000/- per day from the 16th day onwards.

The above item will be measured & paid only in case of Transformer is carried for rewinding in the workshop

Replacement of following parts of unserviceable transformer disconnected under schedule item no-12

New Copper wire

Tap Changer

Insulating material

M & L for preparation of old painted surfaces of HT/LT transformers of capacity 100 KVA to 160 KVA including removing oilly and greasy spots and applying one coats of synthetic enamel paint including white wash to transformer foundation plinth and lettering with white paint as MES NO/SM No, capacity, year of installation, serial No and Make etc over coat on black paint complete all as specified and directed.

All as per item No 14 here in before but transformer of capacity exceeding 200 KVA but not exceeding 750KVA complete all as specified and directed.

Taking down unserviceable PG clamp of any type & size and supply and fix PG clamp of suitable size of 33/11 KV substation including electrical connection complete all as directed by Engr-in-charge

M&L cable jointing kit for 11 KV (earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 Core XLPE armoured aluminium conductor cable of size 50 to 95 Sqmm complete all as specified and directed.

M&L cable jointing kit for 11 KV (earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 Core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm complete all as specified and directed.

M&L cable jointing kit for 11 KV (earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 Core XLPE armoured aluminium conductor cable of size 240 to 300 Sqmm complete all as specified and directed.

Supply and laying of HT / LT side terminal box made of SA 40405 angle iron and 2mm thick MS sheet including removable cover with required holes on flange to fix at body of transformer and removable cover and fixing with new cork sheet gasket with nuts bolts and washers including one coat of synthetic enamel paint as under coat and one as finishing coast to both side of box complete all as specified and directed.

M&L for plain cement concrete 1:3:6 type C-2 using 40mm graded stone aggregate in foundtion of pole/stay assembly ,mass concrete.etc including necessary form work , all as specified and directed.

M&L for preparation of old painted surfaces ,removing dust and other deposited materials by scraping from HT tubular pole of 11 Mtr long, two pole stracture , painting of pole with two coat of aluminium paint including cross arms cable protection pipe clamps etc complete all as specified and directed by Engr-in-Charge.

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

Repair /Servicing of GOD (Gang Operating Device) including gresing/lubricating of all movable parts with checking and replacement move contract blade , jaw type female contract , nuts, bolts and washers, PG clamp etc complete all as directed by Engr-in-charge.

M&L for spray painting with one coat of synethetic enamel paint for outdoor/indoor panel board outer & innner side with two coat of lime wash on plinth of panel board including connected accessories in any size and welded hingeg , locking arragement complete all as specified and directed by Engineer-in-charge

Trimming/Cuting of bushes and grass of Substations/MES Installations and surrounding of Panel board feeder piller boxes at various location and dumping/staging 50 mtr from existing point complete all as specified and directed.

Supply, spreading and levelling 40 mm size graded crushed coarse aggregate around transformer plinth/four pole and two pole structures including earth treatement complete all as specified and directed.

Supply and spread of lime (chuna) powder for the two pole structures/33 KV main receiving station yard complete all as specified and directed.

Material and labour for two coat white wash on wall/ plinth for transformer of different substation complete all as specified and directed.

Taking down unserviceable cable lux from panel/Transformer of any size and supply and fix existing size aluminium cable lux (25 Sqmm to 200 Sqmm ) including electrical connection and testing complete all as directed by Engr-in-charge.

S & Fix PVC conductor sleeves (R,Y,B) of suitable size from Over head line to transformer including electrical connection complete all as per directed by Engr-in-charge.

M&L for 60 cm long angle iron 25x25x3 mm thick including suitable clamps and nut, bolts & waser fixed on HT pole with one primer coat and one aluminium coat paint complete all as specified and directed.

M&L Chemical earthing as per "ASHLOK" make model T-39, copper coated safe earthing electrode (SEE) of 3 mtr lenght with inner pipe of 40 mm dia and outer pipe of 80 mm dia with min 80-100 micron coating, filled with black fill compound mixed with soil and high specific gravity crystallin conductive mixture (CCM) of grade `B`filled inside the earth electrode.including drilling of hole of 150 mm dia bore with boring machine in hard rock and filling the bore hole with black cotton soil level i,e below the electrode bottom level , including PCC earth pit and Copper earth strip of 32 x 6mm with GI tubing light grade for protection up to 7.5 mtrs complete all as specified and directed by Engineer-in-charge.

Samaksh Enterprises

M/S RAKESH TRADERS