REPAIR OR MAINTENANCE OF TRANSFORMER AND ALLIED WORKS AT HQ EAC (U) AF UNDER GE (I) (AF) SHILLONG

Amount

M & L for disconnecting all incoming and outgoing cables of transformers of following capacities at various locations installed on two pole/four pole structures/on platforms at Station, opening the top cover, carrying out following activities :- (a) Draining out all the transformer oil to clean barrel for reuse. (b) Dismantling of all attachment viz breather assy, conservator, oil temperature gauge, HT/LT bushing etc and keeping aside for re-use and re-assembling the serviceable dismantled parts/new spare by providing new insulation materials, gasket, nuts & bolts etc. (c) Inspection of transformer core and winding, drying out transformer core and winding in vacuum chamber till specified IR values are obtained. (d) Cleaning of complete transformer tank, oil fins, removing of sludge and making the inside surface of tank dry by blowing of hot air as directed. Note : Dehydration of collected transformer oil shall be measured and paid seperately

Transformer of capacity 100/160 KVA

Transformer of capacity For 200 KVA

Transformer of capacity For 250KVA

Transformer of capacity For 400KVA

Transformer of capacity For 500KVA

M & L for removing the of transformers of following capacities at various locations installed on two pole/four pole structures/on platforms at Station and loading it in the vehicle carefully using crane and transporting it to the workshop for HV/LV re-winding, transport the transformer back to the site , install it complete all as specified and directed :- Notes : (a) M & L for Cost of re-winding shall be measured and paid for separately

Transformer of capacity upto 200 KVA

Transformer of capacity For 400KVA/500 KVA

M & L for re-winding HV/LV coils of transformers with super enameled copper wire as per the existing gauge and as per laid down standards incl re-insulating with suitable insulating material, complete all as directed

Supply only HT bushing poreclain with copper/Brass stud, nuts, bolts, washers, Stem,bushing ,gasket, oil seal suitable for following capacity transformer complete all as specified and directed.

Transformer of capacity 100/160 KVA

Transformer of capacity For 200/250 KVA

Transformer of capacity For 400KVA

Transformer of capacity For 500KVA

Supply only LT bushing poreclain with copper stud, nuts, bolts, washers, gasket, oil seal SET OF FOUR (For 3 Phase and one for neutral) suitable for following capacity transformer complete all as specified and directed.

Transformer of capacity 100/160 KVA

Transformer of capacity 200/250 KVA

Transformer of capacity 400KVA

Transformer of capacity 500KVA

Supply only MS bolts, nuts and washers as per existing size and length all as directed.

Supply only oil level gauge with replacement of worn out / unserviceable toughened glass,gasket etc for transformers of capacity upto 500 KVA.

Dismantling, cleaning & refixing oil level gauge (indicator) with replacement of gasket etc for for transformers of capacity upto 500 KVA. complete all as specified and as directed.

Supply only tap changer switch with handle for transformer of following capacities complete all as specified and directed:-

Transformer of capacity upto 250 KVA rating

Transformer of capacity exceeding 250 KVA and upto 500 KVA.

M & L for on site centrifusing (dehydration) of old transformer oil at various locations of transformers of Capacity 50 KVA to 500 KVA installed on two pole/four pole structures/on platforms at Station filter action using automatic centrifusing (dehydration) machine to achieve min 40 KV breaking voltage (di-electric strength) at 2.5 mm gap for 2 minutes by absorbing and abolishing all sludge particles for use as per BS-B 66-1983 complete all as specified and directed. Notes : (a) All disconnection/re-connection of transformers HT/LT cables, T & P for required for above activity shall be arranged by contractor and quoted rates deemed to include for same. (b) Dielectric strength of the oil to be tested at site in presence of Engineer-in-charge without any extra cost and recorded the same.

Supply and fill new transformer oil ISI Marked (for topping up) confirming to IS-335 of 1993, low viscosity with dielectric strength 50 KV breaking voltage in 2.5mm gap for 2 minutes filled in transformer at various locations in Station, refixing of top cover and testing, complete all as specified and directed. Note :- Dielectric strength of the oil to be tested at site in presence of Engineer-in-charge without any extra cost and recorded the same.

Supply & fixing of rubber gasket 4mm thick for top cover and other joints for transformers of capacity upto 500 KVA,11/0.433 KV complete all as specified and as directed.

M&L for preparation of old surfaces by scraping, removing, cleaning, of oil, grease painting of transformer internally and externally and applying two coat of heat resistant synthetic enamel paint of colour as directed by spray painting including writing MES No and SM No on transformer body with synthetic enamel paint complete all as specified and directed for following capacities transformer:-

Transformer of capacity upto 250 KVA rating

Transformer of capacity exceeding 250 KVA and upto 400 KVA.

Transformer of capacity 500 KVA.

Supply only heavy duty Silica gel breather assembly (transparent type) suitable for transformer of following capacity complete all as specified and directed.

Transformer of capacity upto 250 KVA rating

Transformer of capacity exceeding 250 KVA and upto 500 KVA.

Supply only Silica gel for breather assembly (transparent type) in granular form for transformers complete all as specified and directed

M&L for preparation of external old painted steel surfaces of steel tubular swaged poles( erected at site as in poles, two pole structure or four pole structure) including MS Channels, mild steel cross arms and painting with two coats of aluminium paint including 5 Nos band/straps (3 Nos in black and 2 Nos in red post office colour/yellow) (300mm wide EACH) using fluorescent paint commencing at a distance 300mm from padestal of pole and marking pole Nos in white letters on black back ground of 20 Cm dia circle complete all as specified and directed for the following :- Note :- Pole number shall be written Sub Station wise i.e. S/S No-01 Pole No-05, it should be "1/5"

HT Poles steel tubular 11 Mtr long

LT Poles steel tubular 9 Mtr long

M & L for PCC 1:2:4 type B-1 using 20 mm graded crushed stone aggregate as in pedestal of poles, platforms of transformers etc including weathering, slightly rounded or chambered angle and throating including use and waste of necessary form work finishing all exposed faces of concrete even and smooth using extra cement complete all as specified and directed.

M & L for PCC 1:3:6 type C-1 using 20 mm graded crushed stone aggregate as in pedestal of poles, platforms of transformers etc including weathering, slightly rounded or chambered angle and throating including use and waste of necessary form work finishing all exposed faces of concrete even and smooth using extra cement complete all as specified and directed.

Demolition of cement concrete (unreinforced) in ground floors and pavings not exceeding 15 cm thickness (below or above ground level) complete all as specified.

Demolition of Brickwork or stone/ boulder masonry, including all quoins, arches, pillars, etc, but excluding ashlar facings, dressed stonework and precast concrete articles built in cement mortar complete all as directed by Engineer-in-Charge.

Material and labour for brickwork with subclass ‘B’ bricks, straight or curved on plan exc 6m mean radius built in cement mortar 1:4 complete all as specified.

Material and labour for 15 mm thick rendering in cement mortar 1:4 in two layers (10 mm +5 mm) on brick wall or concrete surfaces, finished the surfaces even and smooth without using extra cement with using approved LWPC on second layer (5 mm) as per manufacturer instruction complete all as specified . Note: LWPC shall be measured and paid including this item

M & L for Earth continuity conductor galvanised iron strip 32x6mm buried in ground for lightening protection system, to be fixed on porcelene insulator with GI nuts, bolts and washers or any other indicated situation with all accessories complete all as specified and as directed

M&L for Expanded metal, cut to length, bent to shape required and tying with and including annealed mild steel wire not less than 0.9mm dia or fixing with galvanised steel staples supplied and fixed complete to wood or steel members n exc 4.0 kg

M&L for Framed brackets of angles or tees with web and flanges cut to shape, drilled and countersunk for screw, including bending and welding angles, as necessary, gusset plates, riveting, etc.. n exc 10 kg each brackets, conforming to Fe.290.Gde-E-165 complete all as specified.

M&L for cleaning of unmanned/MES installations i.e removing of shurbs,algae and wild plants from installation and cleaning thoroughly area n.exc L-15 Mtr X width 20 Mtr for maint of installations as directed by Engr-in-Charge.

Supply only Copper Bus Bar 4 strips (covered with PVC insulated sleeves) 200 Amps capacity, length 20 to 30 Cm and size 20 x 3 mm, including connection etc complete all as specified and as directed.

Supply only flush mount digital Ammeter (size 96mm x 96mm) complete all as specified and as directed.

Supply only flush mount digital voltmeter (size 96 mm x 96 mm) complete all as specified and as directed.

M&L as in replacement MCCB 4 Pole , 415 V, Adjustable type, 250 Amps with breaking capacity 36 KA

M&L as in replacement MCCB 4 Pole , 415 V, Adjustable type, 400 Amps with breaking capacity 36 KA.

M&L as in replacement MCCB 4 Pole , 415 V, Adjustable type,Thermal Magnetic release, 600 Amps with breaking capacity 50 KA.

Material and labour for preparation of external new surfaces of steel plate with applying two coats of synthetic enamel paint over a coat of red oxide primer for back ground including making striker of transformer data like make, capacity in KVA, location, date of installation, SM/ MES No, Type of winding (Copper/ Aluminium). MS sheet and angle frame nut bolt measured on item above board size. Note: Per 2 Sqm plate shall be measured as a job.

Material and labour for replacement of danger notice plate of 1.60 mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts of approve size for HT, 25 x 20 cm complete all as per manufacturer instruction.

Supply and fix cable route indicator for HT/ LT encraved plate of feeder as 11/1.1 KV in metal including concrete work for foundation and excavation work, indicator welded with angle iron size 50x50x5 mm complete route indicator painted with anticorrosive paint every 40 meter etc. all as per directed by Engineer-In-Charge.

HAMZA CONSTRUCTION CO (BID ID -3362152)

MAHINDER ELECTRICALS (BID ID -3361773)