REPAIR AND MAINT OF HT EXTERNAL ELECT, TRANSFORMER, AVR AND UNDERGROUND CABLES OF SHARIFABAD MIL STN UNDER AGE I CIF K

Amount

Disconnecting all the electrical connections from HT and LT side of unserviceable transformer/Voltage stablizer of capacity upto and including 600 KVA i.e. Jumpers/ Cable from the cable end box or bushings & earthing terminals of the transformers by removing the nuts, bolts including taking down carefully, loading, unloading of transformer/AVR & transportation by vehicle from substation to the repairing workshop including reinstallation, commissioining and testing complete after necessary repair/ servicing etc all as specified and directed. NOTE :- (i) Loading/ unloading of transformer/voltage stablizer shall be the responsibility of the contractor at his own arrangement.

Opening the transformer/voltage stablizer cover alongwith connected accessories, conservator by removing the nuts, bolts then after removing the internal HT & LT connections by taking them out by removing studs, bushings, taking out the core-winding assembly out of the tank, removing out burnt HV and LV windings from the core assembly, cleaning of core assembly with CTC including necessary repairs for the UNSV transformers/voltage stablizer having ratio 11/ 0.433 KV, draining & decanting of burnt transformer oil and cleaning of sludge deposited in the tank and cleaning by using CTC/ thinner for the transformers. Rewinding of HV and LV coils with suitable size super enamelled copper wire/ strip (as existing) having suitable class insulation material. Reconditioning of LT coil of aluminium/ copper wound transformer by turning the old paper insulations, straightening the entire LT Strip providing new paper insulations of superior quality and making coil of suitable design as original. Heating of core winding assembly in hot chamber for 48 hours and removing all the moisture present in it, removal of leakage of tank if any by weilding, refilling transformer oil to tank, after putting the core-winding assembly into the tank, reassembling making the internal HT & LT connections by fixing the studs, bushing, fitting the top cover by replacing cork sheet gasket along with conservator, testing the transformer in the workshop duly filled with oil, all as directed for various capacities upto and incl 600 KVA. NOTE :- (i) Copper wire to be measured as separate item. (ii) Repair of the transformer will be carried out at authorised workshop. AGE (I)/ AGE E/M shall visit workshop before repair of transformer and certificate of authorised workshop shall be submitted by contractor. (iii) Unserviceable item required repairs shall be measured and paid separately under relevant item of this schedule. Transformer oil with die electric strength not less than 60 KV either new or filtered and dehyderated by machine shall be filled and shall be measured and paid separately under respective item.

Supply only super enamelled insulated copper wire any size and shape including all insulating binding, varnishing and baking if required, complete all as specified and directed.

Supply only copper winding strip with insulation of any size for LT coils of transformers/voltage stablizer including providing insulation all as required, complete all as spfecified and directed.

S&F in replacement for LT porcelain bushings 415 V of suitable size for outdoor/ indoor type with rubbersied cork sheet washers complete, of transformer/voltage stablizer of the capacity upto 600 KVA, complete all as spfecified and directed.

S&F in replacement for porcelain bushing for 11KV HT side outdoor transformer/voltage stablizer with rubberised cork sheet washers all as required at site suitable for transformer/voltage stablizer of capacity upto 600 KVA, complete all as spfecified and directed.

S&F in replacement for bush rod (for LT 415 V side) made out of copper as per existing size and type complete with one check nut, two nuts, washers and rubber seal, all as per sample for outdoor/ indoor type transformer/voltage stablizer of the capacity upto 600 KVA, complete all as spfecified and directed.

S&F in replacement for bush rod (for HT 11 KV side) made out of copper as per existing size and type complete with one check nut, two nuts, washers and rubber seal, all as per sample for outdoor/ indoor type transformer/voltage stablizer of the capacity upto 600 KVA, complete all as spfecified and directed.

S&F in replacement for breather assembly for transformer of capacity upto 600 KVA all as per existing all as directed at site, complete all as spfecified and directed.

S&F in replacement for Arcing Horns of suitable size complete all as per sample for transformer of capacity upto 600 KVA, complete all as spfecified and directed.

S&F in replacement for oil temperature gauge/ thermometer for transformer of capacity upto 300 KVA all as per existing, complete all as spfecified and directed.

S&F in replacement for Diaphragm of breather assembly for transformer of capacity upto 600 KVA complete all as per existing specification and size required at site complete all as specified and directed.

Dehydration including filteration of transformer/voltage stablizer oil using dehydration and filteration plant including testing of sample before and after dehydration and filteration complete all as specified and directed. (The dielectric strength to be achieved 60 KV at 2.5mm gap after completion of dehydration and filteration). NOTE :- (i) Dehydration of transformer/voltage stablizer oil in the transformer carried out on the site by dehydration machine. (ii) All the labour work like disconnection of cable and reassembly and drum etc, shall be carried out by contractor by own arrangement. (iii) Shutdown of HT/ LT line shall be taken by contractor in writing from MES rep.

Supply and top up/ filling of new transformer oil in different transformer with high viscosity, high resistance to oxidation & thermal stability, as per IS-335(1993), dielectric strength (BDV) 60 KV with 2.5mm gap, complete all as specified and directed.

Preparation of old painted surfaces and cooling coils/ fins of transformers/voltage stablizer of the capacity upto 600 KVA by removing oil marks using chemical or hot blow lamp. Spary painting to prepared surfaces using synthetic enamel paint of superior quality of colour as approved by GE/ AGE (E/M) as per standard engineering practice with two coats, writing SM No. MES No, Make and capacity with white paint having height of each letter not less than 2.5cm and width not less than 1cm, complete all as specified and directed. NOTE :- (i) Shutdown of HT/ LT line shall be taken by contractor in writing from MES rep.

Supply and filling up in replacement for silica gel superior quality to transformer breather assembly, complete all as specified and directed.

Excavation in trenches in any type of soil not exceeding 1.5mtr wide and not exceeding 1.5 mtr deep, for foundation, etc for shafts, wells, cesspits, manholes, pier holes, laying of cables/ foundation of poles etc not exceeding 10 sqm on plan and not exceeding 1.5m in depth and getting out, complete all as specified and directed.

Excavation in trenches in any type of soil not exceeding 1.5mtr wide and exceeding 1.5 mtr but not exceeding 3.00mtr in depth and getting out for laying of cables/ foundation of poles, complete all as specified and directed.

Removing excavated material (soil) to a distance not exceeding 50 mtr and depositing where directed at a level not exceeding 1.50 mtr above the starting point, complete all as specified and directed.

Returning, filling in, spreading, levelling, watering and well ramming in layers not exceeding 25cm thick, complete all as specified and directed.

M&L for plain cement concrete 1:4:8 type D-2 (using 40mm graded crushed stone aggregates) for foundation filling of pole/ stay and mass concrete including necessary form work, complete all specified and directed.

All as per Srl item No 21, but 1:3:6 type C-1 (using 20mm graded crushed stone aggregate) for foundation filling of stays or copying of poles, complete all as specified and directed.

Dismantling of cross-arms of M.S. Channel or angle sections etc, from poles, complete all as specified and directed.

M&L for cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, weilding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of alumn paint, complete all as specified and directed.

Dismantling unserviceable pre-stressed concrete pole 11.00 mtr long commplete and removing from site, complete all as specified and directed.

Supply, installation and erection in vertical position steel tubular swaged poles, type 410, SP-55 (11 meters long) with 300x300x6mm thick mild steel base plate continuously weilded to pole, MS plate 3mm thick finial taper plug bolt, nuts and screws all as specified including factory painted with two coats of black bituminous paint internally throughout and externally for embedded portion and applying two coats of aluminium paint over a coat of red oxide primer on remaining exposed surfaces and making alternate black and white strips 30cm high with super enameled paint over a coat of red oxide primer upto 1.5 mtrs height from ground level/ coping after erecting, complete all as specified and directed. NOTE :- Excavation, PCC for foundation and earth work shall be measured and paid separately under respective items of this BOQ.

M&L for painting of PCC pole 11 mtr height without removing accessories with one coat of alternative green and white strips of 30cm each upto 1.5mtr height using cement base paint. Marking the pole No with black enamell paint. Painting the steel parts i.e. clamps, channels etc by applying one coat of aluminium paint, complete all as specified or directed.

M&L for scraping of old paint from the steel tubular pole 11 mtr height without removing accessories and preparation of surfaces for repainting. Repainting the pole with one coat of alternative green and white strips of 30 cm each upto 1.5mtr height using aluminuim pait. Marking the pole No with black enamell paint. Repainting the remaining pole and iron parts i.e. U clamps, channels etc above 1.5mtr height by applying one coat of aluminium paint, complete all as specified and directed.

M&L for replacement of exisitng unserviceable switch air break, gang operated device, tripple pole mounted on insulators 15 Nos and steel frame with operating mechanism in worked from ground level, drop out fuse for current rating upto 400 Amps and working voltage 11000 volts, complete all as specified or directed.

Taking out operating handle with clamps from the GO switch to carry out the repairs. Cutting the operating rod to the required length and refixing to the GO switch alongwith new handle and new clamp for handle all as required for smooth operation of GO switch, complete all as specifeid and directed.

Dismantling of spares of GOD such as Male contact, Female contact, copper belt, belt carrier and back connector plate etc, complete all as specified and directed.

S&F of Male contact/ moving contact blade with arching horn having brass contacts suitable for 11 KV GOD, including galvanised iron bolts, nuts and washers for fixing on post insulator or any other indicated situation, complete all as specified and directed.

S&F of Female contact spring loaded having brass contacts suitable for 11 KV GOD, including galvanised iron bolts, nuts and washers for fixing on post insulator or any other indicated situation, complete all as specified and directed.

S&F of tinned Copper braided flexible belt or jumper 200Amp/400Amp, suitable for 11 KV GOD, including galvanised iron bolts, nuts and washers for fixing, complete all as specified and directed.

S&F of MS jumper Carrier for carrying copper braided belt, suitable for 11 KV GOD, including galvanised iron bolts, nuts and washers for fixing, complete all as specified and directed.

S&F of Back connector plate, suitable for 11 KV GOD, including galvanised iron bolts, nuts and washers for fixing, complete all as specified and directed.

M&L for earthing complete with galvanised steel earth plate electrode of size 600x600x6mm thick, burried directly in ground, earth pit not less than 2.25 mtr deep below normal ground level with top edge of earth plate not less than 1.5 mtr below normal ground level, connected to the galvanised iron strip of size 32x6mm by means of bolts, nuts, check nuts and washers of galvanised iron and 32x6mm GI strip protected by provision of GI tube light grade 40mm bore including provision of concrete pit in PCC 1:2:4 type B-1 (using 20mm graded crushed stone aggregates) with 40mm thick RCC 1:2:4 cover, reinforced with XPM weight not less than 4 Kg /Sqm and 6mm dia round bar handle, excavation and earth work in any type of soil, charcoal dust and salt light grade and 20mm bore GI watering pipe light grade with funnel and wire mesh medium grade GI protection pipe 15mm bore 5 mtr long and GI strip upto main earthing of pole, complete all as shown in electrical plate No. 03 of MES Sch 2009 Part-I including dismantling old unserviceable earthing and removal thereof, complete all as specified and directed. NOTES :- (i) Main earthing strip from earth plate electrode to test point up to length of 7.5 meters length shall deemed to be include in quoted rates. (ii) Cost of GI protection pipe & earthing lead beyond 7.5 mtr shall be deemed to be included in the rate quoted. (ii) On testing after completion if the desired resistenance is not obtained the contractor shall redo the earthing without any extra cost to the department .

M&L for earthing complete with copper earth plate electrode of size 600x600x3.15mm thick, buried directly in ground (earth pit not less than 2.25 mtr deep below from normal ground level), connecting to the copper earth strip of size 20x3mm by means of bolts, nuts, check nuts and washers of galvanised iron and earth lead protected by 40mm bore GI pipe, light grade including provision of conrete pit PCC 1:2:4 type B-1 (using 20mm graded crushed stone aggregates) with 40mm thick cover of RCC (1:2:4) type B-1, reinforced with XPM (weight not less than 4 Kg/Sqm) and frame of angle iron 25x25x3mm and with 6mm dia MS bar handle, made to shape, 20mm bore GI light grade pipe for watering pipe, placed on top edge of earth plate and including common salt and charcoal filling, test point with fixing arrangements, funnel, wire mesh and earth work in any type of soil, returning, filling in and removal of surplus soil to a distance not exceeding 50 mtr, complete as per electrical plate No. 3 of MES SSR Part-I (2009), complete all as specified and directed. NOTE :- The earthing will be tested after completion, if desire results not achieved, the contractor shall redo the earthing and rates for the same shall be deemed to include in the quoted rates.

Scraping old paint from steel sections of transformer platform without removing accessories and preparation of surfaces including plastering walls for repainting/ white washing. Repainting the wall with one coat of cement base paint of approved color and repainting the remaining iron parts i.e. cross arms supporting angles, XPM jali, clamps GI bracket etc by one coat of aluminium paint, complete all as specified and directed.

S&F in replacement for anti-climbing device spikes type, fabricated out of MS bars (round, square and flat) including nuts, bolts, washers and weilding in two halves made to shape to suit the cross section of the pole, including, complete all as specified and directed.

S&F in replacement danger notice board with pressed vitreous painted plate fabricated out of 1.6mm thick mild steel sheet vitreous enamelled white with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamp, bolts and nuts of approved size for HT 35x20cm size, complete all as specified and directed.

M&L for repair of existing platform for single transformer as per existing size from natural ground level with brick walling of sub class 'B' bricks in cm 1:6 including repair of steps and plastering work 15mm thick in cm 1:4 & XPM fencing fixed on angle iron posts of size 50x50x6mm upto 1.20m height with gate and locking arrangement, painting etc, complete all as specified and directed.

Notes :- An amount of Rs. 2,28,925.20 on account of Credit Schedule for Schedule 'A' Part-II shall be deducted from total quoted amount of BOQ to arrive at the contract sum.

JK BUILDERS AND ENGINEERS (BID ID -3193748)

M/S Noor Mohammad Shalla (BID ID -3203546)

AM INFRA (BID ID -3197488)

M/S N A Enterprises (BID ID -3198865)