SPECIAL REPAIRS TO 01 MVA POWER TRANSFORMER, VCBs, GOD AND OTHER CONNECTED WORKS AT 33/11 KV STATION AT AF STATION SINGARSI UNDER AGE(I) AF SINGARSI.

Amount

Taking proper shut down, disconnecting the LT/HT electric connections of defective transformer of capacity 01 MVA indoor/outdoor type, removing/taking out the transformer from power house/mounting platform and transporting the same to authorised repair shop, draining out old used transformer oil, dismantling the complete HV/LV coils after opening the top cover/lead of transformer, reassembling the transformer after necessary repairs and transporting back the same after filling/dehydration new transformer oil including making all necessary electrical connections, installating the same at required location, testing and commissioning complete all as specified and as directed :- (Notes :- (1) The following items repaired /replaced with new ones shal be measured and paid seperately under relevant items of this Schedule :- (a) Copper winding wire of HV/LV coils of transformer. (b) Dehydration of transformer oil. (c) Supply & filling of new transformer oil. (d) Supply and fixing breather assembly. (e) Supply & filling new silica gel. (2) The contractor shall return the transformer duly repaired within a period of 20 days failing which they shall be liable to pay penalty @ Rs 100/- per day of delay. (3) Repairing work of transformer will be carried out at authorised workshop of the manufacturer of transformer or through its authorised dealer in the presence of representative or supervisor detailed by the Deptt.)

M&L for rewinding of HV coil conforming to the original size of winding wire of transformer of any make/any capacity with super enamelled copper winding wir/strip of appropriate gauge and turns including provision of all allied materials, T&P required .

M&L for rewinding of LV coil conforming to the original size of winding wire of transformer of any make/any capacity with super enamelled copper winding wir/strip of appropriate gauge and turns including provision of all allied materials, T&P required

M&L in replacement of HV bush 11 KVA rating with bush rod assembly of brass as per IS-3347 & IS-2099:1986, cork washer with nuts, bolts and washers of brass of sutable size for 1 MVA transformer complete all as specified and as directed.

M&L in replacement of HV bush 33 KVA rating with bush rod assembly of brass as per IS-3347 & IS:2099, cork washer with nuts, bolts and washers of brass of sutable size for 1 MVA transformer complete all as specified and as directed.

M&L in replacement on-load tap changer (OLTC) assembly capable of varying secondary voltage in styeps of 2.5 % complete for 1 MVA transformer including connection with HT coils and testing for varying voltage complete all as specified and as directed.

M&L for synthetic rubberised cork sheet 8 mm to 10 mm thick with suitable holes including replacement of defective nuts, bolts and washers as per existing size for 1 MVA transformer complete all as specified and as directed.

M&L taking out existing defective oil drain outlet valve and providing new gun metal valve ,25 /32 mm size or to suit the existing size with flanged connection for indoor/outdoor transformer of any capacity including rubber/leather gasket/packing as required complete all as specified and as directed.

M&L for oil temperature gauge/indicator with G.I. nipple, analogue type, 115mm Segment Dial Millimeter, 0-150 degree celsius range with OTI alarm and trip settings at 80 degree celsius and 90 degree celsius respectively, suitable for transformer outdoor/indoor type and testing complete all as specified and as directed.

M&L for winding temperature gauge/indicator 0-150 degree celsius range with alarm setting and trip setting at 85 degree celsius and 95 degree celsius respectively and having Dial size 115 mm round, Dial Angular sweep 60, Dial gradation -2", suitable for transformer of rating 1 MVA complete all as specified and as directed.

S&F in replacement of breather assembly filled with silica gel for any model, suitable for transformer of rating 1 MVA complete all as specified and as directed.

S&F copper strip of size 50 mm x 6 mm of approx. length 250 mm for taking out connection from LV bush rod of transformer, including provision of necessary bolts, nuts, washers etc of galvanised iron required for connecting cable lugs complete all as specified and as directed.

M&L spray painting to steel surfaces of transformer body with one coat of weather proofd synthetic enamel paint of grey shade after thorough cleaning, removing dust, rust or carbon deposits etc., including writing MES/SM No complete all as specified and as directed.

Supply and filling new transformer oil conforming to IS :335 having dielectric strength not less than 50 KV, flash point not less than 135 deg celsius having low viscosity for topping up/replacing old oil complete all as specified and as directed.(Make: Power Oil/ Savita/HP

Dehydration of old and used transformer oil till it achieves the required dielectric strength including use of all necessary T&P, machine etc. complete all as specified and as directed.

M&L cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination,heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 185 sqmm complete all as specified and directed.

Excavation in trenches in soft/loose soil n.exc. 1.5 mtr wide and n. exc. 1.5 mtr in depth for laying of electric cables or for laying pipes (where provided for protection of cables) and getting out, trimming the sides and forming bottom surface of excavation to required level complete all as specified and as directed.

Excavation in trenches in soft/disintegrated rock such as in road cutting/hard standing etc, n.exc. 1.5 mtr wide and n. exc. 1.5 mtr in depth for laying of electric cables or for laying pipes (where provided for protection of cables) and getting out, trimming the sides and forming bottom surface of excavation to required level and making good disturbed surfaces to match with original complete all as specified and as directed.

Returning, filling in soil including spreading, leveling, watering and well ramming in layers n.exc.25 cm thick after laying and testing of cable complete all as specified and directed.

Removing excavated materials (soils) n.exc.50 mtr and depositing where directed at a level n.exc.1.5 mtr above the starting point complete all as specified and directed

M&L providing sand cushioning with a layer of clean, dry fine sand for protection of electric cable laid in trenches, punned down to desired thickness complete all as specified and directed. (Note: For payment only punned down thickness of sand shall be measured )

Supply & laying reinforced precast concrete cable cover, class HVP, type 1 with peak, size 300mm x 180mm x 40 mm , including taking down old unserviceable cable cover all as specified & directed.

M&L Lightning arrester, expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp for 11000 volts, including taking down old unserviceable Lightning arrester complete all as specified and directed.

M&L in replacement Metal Oxide Lightning arrester complete with all fittings, HT 33 KV, 10 KA, station class, complete all as specified and directed.

S&F switch air break, gang operated, out door, triple pole, tilting type, suitable for vertical mounting, consisting of hot dipped electro-plated galvanized channel base having 12 Nos. insulators, copper/copper alloy tinned contacts, copper or copper plated MS arcing horns capable of making and breaking the magnetizing current complete with horizontal bar, GI pipe 25 mm bore(medium grade) operating mechanism with operating handle and with pad locking arrangement worked from ground level, working voltage 11000 volts, current rating up to 400 Amps including testing complete and taking down old unserviceable GOD all as specified and directed.

S&F switch air break, gang operated, out door, triple pole, tilting type, suitable for horizontal mounting, consisting of hot dipped electro-plated galvanized channel base having 9 insulators and with earth switch upto 200/400 Amp complete with GI pipe 25 mm bore(medium grade) operating mechanism with operating handle and with pad locking arrangement worked from ground level, working voltage 33000 volts including testing complete all as specified and directed.

S & F pin type insulator, porcelain , vitreous , white , brown or green including one mild steel spindle, two galvanized iron washers and galvanized iron nut, 150 mm height, 150 mm dia for 11000 volts grade including taking down old unserviceable insulator complete all as specified.

S & F Post insulator,stack type, porcelain , vitreous , white , brown or green complying with IS: 2544 and IS: 5350, including one mild steel spindle, two galvanized iron washers and galvanized iron nut, 33000 volts grade including taking down old unserviceable insulator complete all as specified.

S & F disc type insulator complying with IS:731 & IS:2633, porcelain, vitreous, white, brown or green, cap and ball pin type with Ball and Socket coupling suitable for use in suspension or tension strings complete with necessary hardware fittings, suitable for working pressure 33000 volts complete all as specified.

Supply, laying , jointing, commissioning and testing in trenches/ along poles/ through duct XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured heavy duty electric cable with aluminium conductor, 11000 volts grade (earthed), 185 sq. mm, 3 core with suitable size cable glands/aluminium lugs including taking down/taking out old unserviceable cable complete all as specified and directed.

M&L steel tubing,100 mm bore, light grade, galvanised, with all fittings; laid in trenches, under floors, under roads/fixed to wall/pole with M.S. flat iron clamps of 25 mm x 3 mm made to shape with necessary GI bolts, nuts and washers of suitable size including painting the clamps with two coats of aluminium paint over a coat of red-oxide primer after necessary preparation to steel surfaces complete all as specified and directed. (Note: Cost of flat iron clamps shall be deemed to be included in the unit rate quoted for the item)

M&L for Silica Gel (deep sky blue colour) for replacement in breathers of transformers complete all as specified and directed.

S&F aluminium cable lugs (Electric connector) for tightness to electric cable with supporting nuts, bolts etc. suitable for 185 sq. mm size aluminium armoured conductor cable complete all as specified and directed.

S&F electric rubber matting (ISI marked), chequered type of size 2.0 m x 1.0 m x 25 mm thick, suitable upto 11 KV working pressure, complete all as specified and directed.

REMCO

Electro Builders