CERTAIN REPAIR TO HT EXTERNAL AND ALLIED WORKS AT ADMIN AREA CPE, ITARSI UNDER GE BHOPAL

Amount

Disconnecting electrically and mechanically outdoor distribution transformers upto 160 KVA 33KV / 0.44 KV capacity, outdoor /indoor type lowering down from 4/6 pole structure/plinth with electric precaution incl lifting of core assembly by opening of top cover and other items for checking of faults/repair and lowering / refixing the same in its original position after inspection to make it ready for transportation to carry out testing in workshop including transportation of unservicieable transformer workshop (rate is deemed to be inclusive of transportation , T&P and men power) and reinstalled after repair at its original position complete all as specified and directed.

Disconnecting electrically and mechanically outdoor distribution transformers upto 315 KVA 33KV / 0.44 KV capacity, outdoor /indoor type lowering down from 4/6 pole structure/plinth with electric precaution incl lifting of core assembly by opening of top cover and other items for checking of faults/repair and lowering / refixing the same in its original position after inspection to make it ready for transportation to carry out testing in workshop including transportation of unservicieable transformer workshop (rate is deemed to be inclusive of transportation, T&P and men power) and reinstalled after repair at its original position complete all as specified and directed.

Taking out the unserviceable copper winding from transformer of capacity upto 315 KVA after opening top cover, and carrying out the following repair work complete all as specified and directed :- (a) Dismantling of all attachment viz breather assembly, conservator, oil temperature gauge, HT/LT bushing etc. and keeping aside for reuse.. (i) Taking out the core with winding assembly. (ii) Removing of complete winding from core and dismantling the core, cleaning of core laminate sheet and keeping aside for reuse (iii) 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 and specified. (iv) Painting of outside surfaces of transformer complete by means of spray machine as directed. (v) Replacement double paper coated insulation including all requisite insulating materials like packing sleeves, separator, tapes etc. heating, varnishing the core and winding assembly after framing up top and bottom steel structure of transformer all as specified and directed. (vi) Fixing only HT procelain bushing with studs, nuts, washers 3 Nos. and LT procelain bushing with studs, nuts, and washers 4 Nos. and connection with primary and secondary windings and reconnecting with the main terminals as required and directed. (vii) Fixing only breather assembly, conservator, oil temperature gauge after proper cleaning, minor repairs etc. as required and directed. (viii) Replacement of all unserviceable gasket from top cover, HT/LT bushing with new one by using rubberised gasket sheet 4.0mm/6.0mm thick duly pasted with suitable adhesive . (ix) Replacement of unserviceable bolts with new one and fixing of existing serviceable bolts, nuts, washers of different sizes and tightening properly. (xi) Repositioning of core and winding assembly inside the tank, assembling complete unit and making the transformer ready for filling oil and subsequent testing as directed. (xi) Filling/topping up of new transformer oil of required quantities.

Supply only HT coils with super enamelled copper wire /DPC of high quality duly matching with the existing guage and impedance complete all as specified and directed.

Supply only LT coils with super enamelled copper wire strip/DPC of high quality duly matching with the existing guage and impedance complete all as specified and directed.

Supply and fill unused mineral insulating oils conforming to IS 335: 2018, Type II Class (Transformer oils), Uninhibited (U), pour point -10⁰C, vacuum filtered in a laboratory, Breakdown voltage of min 60 kV at 2.5 mm gap complete all as specified and as directed.

Filtration, Dehydration, reconditioning of transformer oil by using filtering equipment, vacuum dehydrator etc. to obtain minimum break down voltage of 60 kV and maximum water content of 30 mg/kg as per IS 1866: 2017 and IEC 60422: 2013 complete all as specified and as directed.

Supplying and fixing in replacement, Porcelain Transformer bushing on LT (440 Volt) side, including brass stems conical bush and gasket after disconnecting electrically and mechanically for indoor/outdoor transformer of capacity upto 315 KVA and re-connecting electrically and mechanically, testing complete all as specified and directed. Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, opening of top cover by unscrewing nut, bolts washers and provision of pad type bus bar almuminium of approppiate size /capacities of transformers with nut bolt & washers.

S & F in repairs HT side 36 kV/ 250 A bushing with copper stem including both porcelain parts and metal parts upto 315 KVA distribution transformer with accessories as per IS 3347 Part 5 (section 1 & 2) complete all as specified and as directed.

Supplying and fixing in replacement, all unserviceable gasket after disconnecting electrically and mechanically for indoor transformer 33/.433 KV of capacity upto 315 KVA and re-connecting electrically and mechanically, testing complete all as specified and directed. Note. The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, opening of top cover by unscrewing nut, bolts washers etc.

Supplying and fixing in replacement, Silica Gel Breather assembly including vent pipe and Silica Gel for outdoor transformers, capacity upto 315 KVA complete all as specified and directed.

S & F in repairs 25 mm dia gunmetal drain valve of transformer as per existing one along with iron wheel head,screwed both ends complete all as specified and as directed.

M&L Lighting arresters explusion type complete with all fittings. 65 K Amp discharge capacity distribution class, suitable for 33KV complete fixed on channel / cross arm including connecting to overhead line and upto earth pit complete incl taking out unsv complete all as specified and directed. (Set of three)

Supply and lay in replacement of HT rubber mat of size 2 mtr x 1 mtr x 3 mm thick complete all as specified and directed.

Supply and fix in repairs DO fuse assembly, suitable for horizontal and vertical operation, triple pole mounted on polymer HT insulator 6 Nos and mild steel galvanised steel frame rating upto 200 Amp, 33 kV complete with DO fuse and electrical connections, jumpering by ACSR conductor and connectors complete all as specified and as directed.

S & F in repairs gang operated air break switch as per IEC 62271-103 amended upto date, rocking/ tilting type, suitable for both horizontal and vertical mounting, three poles, outdoor type, nominal system voltage 33 kV, rated voltage 36 kV, rated frequency 50 Hz, continuous current rating 400 Amps, rated short time withstand current for three seconds 25 kA, rated peak withstand current for three seconds 62.5 kA, rated lightning impulse withstand voltage (i) to earth and between poles 170 kV (Peak) (ii) across the isolating distance 195 kV (Peak), power frequency withstand voltage between (i) earth & poles 70 kV (rms) (ii) across the isolating distance 80 kV (rms), minimum isolating distance in open position 520 mm, phase to phase clearance 1220 mm, minimum cross sectional area of fixed contact 300 sqmm, minimum cross sectional area of moving contact 250 sqmm, copper connector having minimum cross sectional area of 250 sqm, maximum current density of 1.6 Amps/ sqmm for all current carrying parts, single number of brake per phase, medium grade galvanised iron pipe of 32 mm nominal bore and 5 to 6 metre length in single piece for operating pipe, pad-locking in both ‘on’ and ‘off’ position with indicators, electroplated nonferrous parts, hot dip galvanised ferrous parts, 3 Nos polymer post insulator per phase as per IEC 61109 amended upto date having rated voltage 36 kV, minimum creepage distance 900 mm, impulse withstand voltage 170 kV, wet power frequency withstand voltage 75 kV, dry wet power frequency withstand voltage 75 kV complete all as specified and as directed.

M& L for servicing of 33 kV gang operated air break switch, any type (horizontal or vertical) by cleaning the contact, greasing, applying petroleum jelly at the contact point, checking serviceability and including replacement of heavy duty brass jaw and blade set, copper strip set, lugs, nuts, bolts, washers, aluminium thimbles, jumpers, all as per the existing complete all as specified and as directed. Note: - (1) The cost for replacement of brass jaw, blade set, copper strip set, lugs, nuts, bolts, washers, aluminium thimbles, jumpers, lubricating materials, etc. shall be deemed to be included in the unit rate quoted by the contractor for the item.

Material & Labour for painting of transformer installed on plinth 2 pole or on plinth structures at various site of capacity upto 160 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Material & Labour for painting of transformer installed on plinth 4 pole structures at various site of capacity 200 to 315 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Earthing complete in replacement with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 3.5 m below normal ground level) with top edge of earth plate not less than 2.5m below normal ground level, connected to galvanized iron strip 32X6 mm by means of electric arc welding of galvanised iron or steel as shown in electrical plate No 3 of SSR Part I, connected to earth test point and the equipment on the other side complete all as specified, including testing and commissioning complete all as specified and directed. Note: - (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 40 mm bore GI pipe light grade etc. (b) The quoted rates shall also deem to include the cost of earth test point and earth strip/GI earthing and protection pipe upto 7.5 meter beyond the earth plates electrode.

Material & Labour for replacement of jumper/bus bar made of ACSR conductor of existing size on HT 2/4 pole structure having 3 incoming/outoing feeder including bus bar with PVC sleeve , lugs , nut bolts and washers complete all as specified and directed.

M & L for 2 coat of aluminium painting over a coat of red oxide to steel surfaces of HT 2 pole structure (Angle Iron/MS channel /MS clamp etc) including preparation of old surface complete all as specified and directed.

M & L for 2 coat of aluminium painting over a coat of red oxide to steel surfaces of HT 4 pole structure (Angle Iron/MS channel /MS clamp etc) including preparation of old surface complete all as specified and directed.

M & L for cutting and removing grass, vegetation bushes etc from surrounding 2/4 pole HT structure , outside area of HT/LT installation and removing all rubbish to a distance not exceeding 50 m complete all as specified and directed.

Supply and replacement in repair of of broken earth pit as per specified size made of PCC 1:2:4 type B1 using 20 mm graded crushed stone aggregate, 20 mm and earth pit cover made out of RCC 1:2:4 type B1, cover reinforced with 8 mm dia TMT bars @ 100 mm centre to centre both ways with handle made out of 8 mm dia bar, watering arrangement with funnel and wire mesh and including reconnecting of earth lead of any type with new nuts, bolts and washers etc as required at site with testing result. complete all as specified and directed.

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 mtr deep in any type of soil (soft/losse soil) for foundation of transformer etc and getting out and levelling of bottom suface to required level complete all as specified and directed.

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

Removing excavated material (ie soil) from site to a distance n. exc 50 mtrs away and depositing where directed at a level n. exc. 1.5 mtr above the starting point complete all as specified and directed.

M & L sand filling in-trenches with clean dry sand unwashed including gently pruning around cables complete all as specified and directed. Note:-punned thickness only measured for payment.

Supply & laying unreinforced precast concrete cable cover class HV type 2, flat shape, dimension 450 mm X 180 mm X 40 mm as per IS 5820: 1970 complete all as specified and directed.

S&F in replacement 50 mm bore GI Pipe light grade with necessary accessories/ fittings for cable protections complete all as specified and directed.

M & L for 2 coat of synthetic enamel painting over a coat of red oxide to MS wire fencing including preparation of old surface complete all as specified and directed.

Supply and fill in replacement silica gel in breather of transformer complete all as specified and directed

Supply only drop out fuse for 33 kV line, 3.5 to 20A complete all as specified and as directed.

Supply only pressure sensitive adhesive plasticized PVC tapes with non-thermosetting adhesive, designation F-PVC/90/0/Tp, general purpose application for electrical insulation, plasticized poly vinylchloride backing material, thickness 0.125 mm, width 25 mm, length 20 metre all as per IS 7809 (Part 3/section 1): 1986 complete all as specified and directed.

M & L for loose filling with broken stone or boulder aggregates of gauge 40 to 80 mm in soakage pits, soakage wells, on open space etc. complete all as specified and as directed.

M & L for tap changer off load type suitable for transformer of capacity 160 kVA complete all as specified and as directed.

M & L for tap changer off load type suitable for transformer of capacity 200/315 kVA complete all as specified and as directed.

M&L in replacement 32x6mm galvanised iron strip for earth continuity conductor for earthing of transformer , GOD , 4/6 pole , structure etc complete all as specified and directed.

Dismantling of UNSV HT tubular pole after taking down ACSR conductor , insulators cross arms including demolition ofold PCC upto ground level etc complete all as specified and directed.

Supply, laying and testing cross linked polyethylene (XLPE) insulated, PVC sheathed cables for working voltages 33 kV (E), three phase, earthed system, 3 core, screened, armoured power cable, 120 sqmm of nominal area of conductor, aluminium conductor, ISI marked as per IS 7098 (Part-II): 2011 laid in trenches or under floors making all connections with necessary glands lugs bushing complete all as specified and as directed.

S & F XLPE cable end termination, cold shrinkable, outdoor type complete with jointing material and accessories suitable for voltage 33 Kv (Earthed), 3 core, 120 sqmm complete all as specified and as directed.

Supplying & laying in trenches, in road cutting and along pole 150 mm nominal bore, light grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Dismantling insulators any type, any size complete all as specified and as directed.

S & F polymer pin insulator, Type B, Nominal System voltage 33 kV, highest system voltage 36 kV, visible discharge test voltage 27 kV, wet power frequency withstand voltage 75 kV, power frequency puncture withheld voltage 180 kV, impulse withstand voltage 170 kV, minimum total creepage distance 580 mm, minimum failing load 10 kN, of suitable size with galvanised steel insulator pin, nut, washers complete all as specified and as directed.

S & F porcelain shackle insulator, Type B, Nominal System voltage 33 kV, highest system voltage 36 kV, visible discharge test voltage 27 kV, wet power frequency withstand voltage 75 kV, impulse withstand voltage 170 kV, minimum total creepage distance 580 mm, minimum failing load 70 kN, of suitable size with galvanised steel stud pin, nut, washers complete all as specified and as directed.

S & F polymeric composite disc insulator, ball and socket type, Type B, Nominal System voltage 33 kV, highest system voltage 36 kV, visible discharge test voltage 27 kV, wet power frequency withstand voltage 75 kV, impulse withstand voltage 170 kV, minimum total creepage distance 580 mm, minimum failing load 70 kN, of suitable size with galvanised steel stud pin, nut, washers complete all as specified and as directed.

M & L in repair for disconnecting and taking out worn out jumpers of HT overhead line at cut point/ at two pole/ four pole structure of any size any length as per existing after removing binding wire connector of AB switch/DO fuse unit, replacement of old jumper with the new ACSR conductor (Mink/ Dog conductor as directed by Engineer-in-Charge) Jumpers Including PVC sleeve in colour coding R/Y/B of same size and length including new binding wire connectors suitable for AB switch/DO fuse unit, with providing conducting jelly complete all as specified and as directed. (Note: -Each Jumper to be measured separately)

M & L for hot dip galvanized stay strands of grade I, 7 Nos wires construction, wire diameter 3.15 mm, nominal strand diameter 9.45 mm, heavy zinc coating complete all as specified and as directed.

M & L for loop type insulator (porcelain guy strain insulator), large size, with overall dimensions 140 mm X 90 mm, cable hole dia 25 mm, creepage distance 57 mm, minimum failing load 88000 N, vitreous porcelain, white, brown or green, Designation C as per IS 5300: 1969 complete all as specified and as directed.

M & L for trimming of branches of trees touching HT Electric over head line and making clear about 3 m in radius and carrying and disposal where directed not exceeding 50 m complete all as specified and directed. Note :- Vehicle and other T&P shall be arranged by the contractor at own cost.

S&F Danger Notice Plate of 1.6 mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour writing in Hindi, English and in local language of the Darjeeling District and fixed with M.S clamps, bolts and nuts of approved size for High Tension/11000 voltage lines/poles of size 25 x 20 cm complete as per IE Rules 1956-para 35 complete all as specified and directed.

S&F aluminium strip of size 25x3 mm with proper fixing at every 1 mtr length as lightening conductor for lightening arresters on HT poles/Transformer incl necessary nut & bolts incl taking out unsv complete all as specified and directed.

S & Fixing in replacement of galvanised steel continuous earth wire/ guarding wire of HT pole of size 4.00 mm for continuous earth of pole complete including taking down unserviceable GI wire of any capacity and shape complete all as specified and directed.

Restringing of 33 KV HT ACSR over head conductor of three wire run conductor comprising of any size on existing pole after opening from insulator by taking ouit of winding wire and refixing the same with suitable size of winding wire up to permissible sag after restringing including proper fixing of deposited insulator complete all as specified and directed.

S & F XLPE straight through joint cold shrinkable type complete with jointing material and accessories suitable for voltage 33 Kv (Earthed), 3 core, 120 sqmm complete all as specified and as directed.

Supply and fixing HT RCC Precast route marker of size 650x300x100 mm with steel (TMT Bar) user of 8 mm and 6 mm complete all as specified and directed.

pyarelal galar (BID ID -3183046)

M/s SHIVRATAN CONSTRUCTION (BID ID -3178359)

M/S RAKESH TRADERS (BID ID -3183396)