REPAIR/ MAINTENANCE/ IMPROVEMENT OF TRANSFORMER AND HT POWER SUPPLY DISTRIBUTION SYSTEM AT AF STATION SIRSA UNDER GE (AF) SIRSA

Excavation in trenches manually (not use a JCB) not exc 1.5 m wide and not exceeding 1.5 m depth for foundation laying of cables etc and getting out in soft loose soil complete all as specified and directed by Engineer-in-Charge.

Returning filling including spreading leveling watering and well ramming in layers not exc 25 cm in soil completed all as specified and directed by Engineer-in-Charge.

Removing excavated material not exc 50 m and depositing where directed at a level not exc 1.5 mtr above the starting point as in soil complete all as specified and directed by Engineer-in-Charge.

Material and labour for sand cushioning (dry) in trenches/ducts for protection of UG cables( below, above and around the UG cable laid) of 23 cm spread thickness (8 cm in depth before laying the cable and 15 cm in depth after laying the cable ) and cosolidated ( punned) up to 180mm thickness complete all as specified and as directed by Engineer-in-Charge. Note :- Punned thickness of sand cushioning will be measured, for the payment purpose.

Material and labour for cable protection, GI tubing of 50mm bore size, light grade fixed along the pole/under road complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repairs of 33/11KV HT side bushes of 2 MVA transformer complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repairs of 33/11KV LT side bushes of 2 MVA transformer complete all as specified and directed by Engineer-in-Charge.

Supply and fixing SF-6 Gas complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repairs of Oil winding temp gauge double needle type of 2 MVA trasformer complete all as specified and as directed by Engineer-in-Charge.

Material and labour for Coarse aggregrate/ pebbles of size 20 mm, laid in layers not exceeding 25 cm duly compacted at Main Sub station and applying of lime solution before lying of aggregrate complete all as specified and directed by Engineer-in-Charge.

Supply only transformer Oil having di-electric strength not less than 40Kv complete all as specified and directed by Engineer-in-Charge.

Material and labour for topping up of transformer oil by contractor in presence of MES staff complete all as specified and directed by Engineer-in-Charge. Note : Transformer oil shall be measured and paid separately under Item No. 12 of BOQ.

Supply and fixing in repairs Oil-winding temperature gauge (double needle type) of transformer up to 400 KVA capacity complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing in repairs of Aluminium strip of 50x12mm size including bending and fixing at the terminals of transformer LT side wherever directed for connection the outgoing cable lugs of different sizes complete all as specified and directed by Engineer-in-Charge.

Repair and Replacement of current transformer moulded in epoxy compound with dual ratio 100/20/5 Amps complete connection with auto wire 2.5 Sqmm including bending as existing in VCB at site complete all as specified and directed.

Material and labour in replacement for earthing complete with GI earth plate electrode of size

60 cm x 60 cm x 6 mm thick buried directly in ground vertically at a depth not less than 2.25 mtr below normal ground level with top edge of earth plate at depth not less than 1.5 mtr below normal ground level surrounded from all sides by 15 cm thick and packed layer of charcol dust and common salt filling in alternate layers and electrode connected by galvanised iron strip 32 mm x 6 mm by means of bolts, nuts, check nuts and washers connected to test termination point protected by 40mm bore GI pipe light grade and GI pipe light grade 20mm bore for watering and including funnel, wire mesh, RCC pit cover and PCC chamber pit with PCC 1:2:4 type B1 including excavation and earth work, disposal of surplus soil to a distance not exceeding 50 mtr all as specified and shown in electrical plate No 3 of SSR Part - I complete all as specified and directed. Notes : (i) The unit rate shall include for GI water pipe, protection pipe wire mesh, funnel, excavation, RCC pit cover, PCC, test point, GI strip 32 X 6 mm from top of earth plate upto 5 mtr. (ii) PCC pit shall be provided at least 1.5m away from the earth pit and extra cost of additional length of water pipes and fixing junction, elbows etc. shall deemed to be included in the unit rate. (iii) RCC pit cover shall be percast of RCC 1:2:4, type B-1, 80 mm thick reinforced with XPM weighing not less than 4kg/Sqm in lieu of cast iron cover.

All as per Srl item No 18.00 here in before but for transformer of capacity 200 KVA to 315 KVA complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of LT bushings with brass terminal, brass nuts and washers, gaskets, insulator etc., suitable for 63KVA to 315 KVA transformer complete all as specified and directed by Engineer-in-Charge.

A. (i) TPN Copper Electrolytic grade bus bar of capacity 1200 Amps for phases & for neutral and auxillary busbar to support main busbar duly supported on SMC/ DMC, busbar supports and insulated with colour coded heat shrinkable sleeve. (ii) Digital multifunction meter (V A, KW, KWH), 415 V AC alongwith CT's of suitable ratio (Set of three), Class 1.0 complete. (iii) Indication lamps LED type (RYB) = 01 Set of three CT's 630/5A class 1.0.15 VA (Cast Resin) for metering - 03 Nos. (iv) Internal wiring with suitable size of FRLS copper conductor cable. B. Incomer : (i) MCCB 630 Amps 4 pole, 36 KA, fixed magnetic and thermal release complete with phase separator - 01 No C. Outgoing : (i) MCCB 250 Amp 4 pole, 25 KA, Ics = 100% Icu with fixed magnetic and thermal release complete with phase seperator - 04 Nos. (ii) MCCB 160 Amp 4 pole, 25 KA with fixed magnetic and thermal release complete with phase separator - 01 No Note : (i) LT Panel shall be CPRI approved. (ii) Contractor shall submit the following test report i.e. IP test report and verification of short circuit withstand test report issued by CPRI in respect of LT Panel. (iii) Contractor shall submit drawing for approval of Accepting Officer prior to place order.

Material and labour for replacement of disc type insulator porcelin vitreous 145 mm high and 255 mm dia ball and socket type white brown or green two in series assembly for tension with tension clamps for conductors working pressure 11000 volts complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing in repairs of vertical type switch air break gang operated switch triple pole mechanically operating mounted on insulator and steel frame with operating mechanism worked from ground level for current rating up to 400 Amps and working pressure of 11000 volts grade consisting of 4 insulator per pole with 25 mm dia GI medium grade operating handle and locking arrangement fixed with down rod operating brackets complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of lightening arrestor expulsion type complete with all fittings, transmission class, discharge capacity 65 KA, suitable for 33000 volt grade complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of danger notice board/ plate of 1.6 mm thick mild steel sheet vitreous enameled white with letter figures and conventional skull and bones in signal red colour and fixed with MS clamps, nuts and bolts of approved size of HT 25X20 cm size complete all as specified and as directed by Engineer-in-Charge.

Material and labour for replacement of Drain plug of transformer complete all as specified and directed by Engineer-in-Charge.

Material and labour for De-hydration and filtration of transformer oil by using dehydration and filtration plant, heating and filtration of oil to be carried out till the di-electric strength reaches 50 KV to 55 KV withstand for one minute is achieved for any capacity of transformer complete all as specified and directed by Engineer-in-Charge.

Material and labour for Dismantling transformer of capacity upto 400 KVA to 02 MVA by lifting the top cover for taking out the HT/LT core and draining out the transformer oil in clean barrel including cleaning the transformer chamber body inside and outside with emery paper after that check all the winding and other wornout parts such as HT/LT coils, silcon stamping and other connected items like tap changer, breather assembly, explosion tube with diafram, connector tank, etc., and replacement of HT/LT coil winding with DPC enamelled copper/ aluminium wire/ strip of adequate size and number of turns complete and conneted to existing serviceable strip by jointing with soldering and re-installed with cotton tape over strip including using insulating material like varnish to limb coil fire proof type over the strip and baking of insulating material in heating chamber in adequate temp required. Reassembling the transformer LT/HT connection after proper De- hydration, filling of transformer oil, Reconditioning and testing of transformer after reassembling complete on No load at workshop and on load testing at site and complete all as specified and directed by Engineer-in-Charge. Note :- (i) The cost of gasket set, LT/HT bushes, nuts, bolts, washers etc., required for the complete the job are deemed to be included in the rate quoted by bidder. (ii) After refixing of transformer, necessary testing based on partial load and full load shall be carried out to the entire satisfaction of Engr-in-Charge. (iii) Unserviceable transformer should be rewinded in workshop within a week time, failing which penalty will be imposed on contractor @ 1% of quoted amount of item Per Week. (iv) Transportation of transformer upto workshop and back to site will be complete resposbility to the contractor and no other charges will be paid to contractor towards transportation. (v) Copper/ Aluminium winding of transformers, if replaced shall be measured and paid separately under respective item. (vi) Transformer oil shall be measured and paid separately under respective item as "Supply Only".

Material and labour for replacement of breather assembly complete with silica gel blue colour up to 2 kg weight (as per site requirement) of make, type and capacity, compatible with existing transformer complete all as specified and directed by Engineer-in-Charge.

All as per Srl item No. 29.00 here-in-before but of capacity for 2000 KVA transformer complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of silica gel for (blue colour) transformer of any capacity, compatible with existing transformer complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of Dial type temperature gauge 0 to 1000 degree centigrade range suitable for any capacity of transformer compatible with existing transformer complete all as specified and directed by Engineer-in-Charge.

Material and labour for MS work as posts and struts in fencing, entry gate etc including cutting tops to shape as directed, drilling holes, notching for wire, etc., flat iron fillets (for securing wire mesh etc.) including all necessary nuts, bolts & washers, drilling, bolting or riveting, etc. and similar work conforming to Fe-290 Gde E-165 including dismantling of existing old MS sections along with necessary earth work and painting on new steel surfaces with two coats of synthetic enamel paint over a coat of red oxide primer after preparation of surfaces complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of winding of transformer with appropriate gauge solorined copper wire for transformer 63 KVA to 750 KVA, 11 KV, 3 phase of any capacity complete all as specified and as directed. Note :- (i) Contractor shall furnish the guarantee for 01 year from repairing date. (ii) Dismantling, taking down, to & fro transportation and re-installation of transformers shall be measured under Ser Item No 18.00 to 19.00 here-in-before.

Material and labour for Disconnecting & taking down/out unserviceable HT XLPE Cable 11 KV of size 70 Sqmm to 120 Sqmm 3 core of any description from trenches, floors, walls, GI pipes, etc., seggrating serviceable cables, pipes, bricks, etc. including keep in safe custody for re-use and unserviceable cable removing to and depositing at E/M Store Yard, complete all as specified and as directed by Engineer-in-Charge . Note :- (i) Any damage/punchered into HT cable the contractor will be responsible. (ii) Before Laying meggaring the complete cable. (iii) Any damage of HT cable the contractor will be responsible. The contractor will have to supply new cable of same size and specification in liew of old cable without any extra cost.

All as per Srl item No. 35.00 here-in-before but of size 120 Sqmm 3 core complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination Heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 to 95 sqmm including testing on completion complete all as specified and as directed.

All as per Srl item no. 37.00 here-in-before but of size 120 to 185 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

Material and labour for replacement of 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 50 to 95 sqmm including testing on completion complete all as specified and as directed by Engineer-in-Charge.

Material and labour for replacement of 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 120 to 185 sqmm Including testing on completion complete all as specified and as directed by Engineer-in-Charge.

Material and labour for replacement of Cable jointing kit for 33 KV (Earthed) grade cable for staright through joints 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 Including testing on completion complete all as specified and as directed by Engineer-in-Charge.

All as per Srl item no 41.00 here-in-before but of size 120 to 185 Sqmm complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of supply and laying un-reinforced precast concrete cable cover, class HV, type 1, flat, size 300mm x 180mm x 40mm complete all as specified and directed by Engineer-in-Charge.

Material and labour for making of trenchless bore to road link width for providing GI Pipe upto 110mm dia for passing armoured cable complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of Galvanised steel tubing pipe 80mm bore (dia), light grade with bend, laid in trenches or under roads/ flooring/ culverts and/or fixing to electric poles with suitable size mild steel flat iron clamps, bolts, nuts, washers, etc., complete all as specified and as directed by Engineer-in-Charge.

Material and labour for replacement of multi function meter LCD display type with parameters range Volt, Amp, Frequency, Powerfactor, KW, KVA, KVAR, KWh, KVAh, KVARh, Runhours, On hours, Phaseangle, Interrupts, THD, Events (High-low), neutral currents with RS- 485 including wiring required at site complete all as specified and as directed by Engineer-in-Charge.

Material and labour for replacement and posting of electrical insulating mat 2.5 mm thick made out of di-electric elastomer which possess elastic properties and may be neutral or synthetic in nature should have working voltage - 11 KV No tear or breakage due to trolley movement & foot traffic resistant to acids, alkalis, solvent and transformer oil, (pasteable type) can be easily pasted/ installed on floor, water and moisture proof complete all as specified and directed by Engineer-in-Charge.

All as per Ser Item No 47.00 here-in-before but 3.0mm thick for 33 KV complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured (Earthed), electric power cables (heavy duty) with aluminium conductor, 11000 volts, grade cross sectional area 95 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge. Note :- Cable jointed shall be measured and paid separately.

Material and labour for cement concrete 1:2:4, type B-1 using 20 mm graded stone agregrade around the LT/ HT Poles/ BUS Bar/ LT Panel/ Path, including demolition of old concrete and removal of debris from site complete all as specified and as directed by Engineer-in-Charge.

Material and labour for fine river sand, screened, filling on the levelled ground surfaces/ducts in substations/below 2 pole and 4 pole structures etc. complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing in repairs of Buchholz Relay for any type of transformer with and including pressure guage should be of sturdy construction and resistance to corrosion as per IS Specification complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repairs of Oil level indicator for 250 to 400 KVA transformer complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in replacement of linear type off circuit tap changer with and including all requisite accessories, current rating up to 100 amp, no of taps will be 05 & 07 no, bridge type mounting cover including complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in replacement of rotary side base off circuit tap changer, voltage capacity up to 36 KV, current rating up to 150 Amps, no of taps up to 9 no tap and as phases of connection, bridge (ring) type cover mounting complete all as specified and directed by Engineer-in-Charge.

Material and labour for explosion tube for any size as per requirement for transformer up to 400 KVA capacity complete all as specified and directed by Engineer-in-Charge.

Supply, installation, commissioning and testing of LT Panel outdoor type (Size of panel size = 2x2x1 mtr (lxbxd), CPRI approved, totally enclosed vermin proof suitably ventilated for 3 phase, 4 wire 415 volts, 50 Hz, AC supply, outershell shall be made out of 3.15mm thick CRCA sheet & MS angle section of suitable size for frame factory fabricated, compartmentalized inner shell shall be made out of 2.0 mm thick CRCA sheet for control gear, front and back, door opening with locking arrangement at front prior to powder coating and powder coated with minimum 50-70 micron of approved colour. The bottom of outer shell contains a detachable plate having provision for entry of armoured cable of adequate size the required no of holes to be fixed with chromium plated brass cable glands of suitable size for entry and exit. Computer cut self adhesive vinyl danger notice plate having coventional symbol of bones and skull to be provided. EPDM gasket of appropriate shape and size provided at all joints, doors and covers including suitable size angle iron/ flat iron frame work/ support required with four legs 60 cm long using angle iron 40 x 40 x 6 mm, air passing holes and locking arrangement at front with duplicate keys and making connection of incoming and outgoing cable using proper cable lugs, legs grouted in PCC 1:2:4 and making good disturbed surface complete all as specified and directed by Engineer-in-Charge.