MAINT AND REPAIR EXTERNAL HT SUPPLY WORKS AND CONNECTED WORKS AT TECH AREA CPE ITARSI UNDER GE BHOPAL

Disconnecting electrically and mechanically outdoor distribution transformers upto 100 KVA 11KV / 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 500 KVA 33KV / 11 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 500 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 as directed.

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

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 70 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 upto500 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 500 KVA distribution transformer with accessories as per IS 3347 Part 5 (section 1 & 2) complete all as specified and as directed.

S&F in repairs Core of transformer upto 500KVA transformer made of High grade cold rolled grain orient (CRGO) annealed steel of M4 or superior, having low loss and good graing properties, conform to IS 3024 and IS 649-1983, including core lamination and providing manufacturers test report showing losses in Watt per kg, complete all as specified and directed

Supplying and fixing in replacement, all unserviceable gasket after disconnecting electrically and mechanically for indoor transformer 33/11 KV or 11/0.433 KV of capacity upto 500 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/indoor 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 as directed. (Set of three)

M&L for Lighting arresters explusion type complete with all fittings,30 KA discharge capacity, distribution class, suitable for HT 11KV 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 as 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 as directed.

Supply and fixing in replacement Switch Air break, Gang operated with drop out fuse unit TP suitable for horizontal or vertical operation, mechanically operated mounted on 15 insulators and steel frame with operating mechanism and operating rod of 20mm bore, medium grade, GI pipe worked from ground level with locking arrangement for 400 Amps rating 11 KV working pressure including Electrical connections 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.

M& L for servicing of 11 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 male and femalle contact 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 on plinth structures at various site of capacity 500 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 outdoor/indoor type at various site of capacity 100 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 as 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 deemed 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 as 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 as 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 as 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 as directed.

M&L for replacement of factory made RCC precast earthing pit chamber of size 400 mm x 400 mm x 300 mm & 65 mm thick including fixed pit cover 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 as directed.

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

M & L sand filling in-trenches with clean dry sand unwashed including gently pruning around cables complete all as specified and as 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 100 mm bore GI Pipe light grade with necessary accessories/ fittings for cable protections complete all as specified and as directed at site.

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 as directed.

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

Supply & Fix drop out fuse for 11 kV line, 3.5 to 20 A complete all as specified and as directed.

Supply & Fix drop out fuse for 33 kV line, 3.5 to 20 A 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 as 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 100 kVA complete all as specified and as directed.

M & L for tap changer off load type suitable for transformer of capacity 500 kVA complete all as specified and as directed.

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

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 as directed.

Supply, laying, testing and commisioning in replacement of HT underground cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire aromoured electric power cables (heavy duty) with aluminium stranded condutor served with an inner sheathing of PVC tape armoured with galvanized steel strip and overall PVC sheathed 11000 volts grade (earthed) of cross sectional area of size 120 sq mm 3 core including taking down complete all as specified and directted.

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.

All as per item no - 47 but 11 KV

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.

All as per item no -50 but 11 KV

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 as directed. Note :- Vehicle and other T&P shall be arranged by the contractor at own cost.

Material and labour in replacement Retro Reflective installation sign boards of size 5 feet x 4 feet fabricated out of 16 gauge MS sheet frame duly welded/riveted with MS square pipe of size 25mm x25mm at height 2.00 meter above ground level on stainless steel heavy duty pipe of size 50mm bore embaded 60 CM in PCC 1:2:4 type B 1 block of size 45cmx45cmx60cm including necessary excavation and earth work .The steel portion of the board shall be painted in stove enameled paint and the front & back of the frame shall be overall sheathed with blue colour base painter adhesive tape. The wiriting matter will be in English language on both sides with reflective adhesive painter tapes complete all as specified and as directed.

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 as 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 as 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 as directed.

Restringing of 11 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.

M&L Cable jointing kit for 11000 Volts grade (E) cable outdoor termination Heat shrinkable type joint complete with jointing material suitable for 3 core XLPE armoured aluminium joint conductor cable of size 120 Sqmm and jointing materails for making joints and testing 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.

Earthing complete in replacement ( CPRI TESTED) 76MM OUTER DIA X 3 MTR LENGTH ZINC COATED ( 80-100MICRONS ) High quality GI PIPE 3.2MM MINIMUM THICKNESS, FILLED WITH CONDUCTIVE CRYSTALLINE COMPOUND , FITTED WITH FROM TOP TO BOTTOM INSIDE WITH 50X6X3100MM GI STRIP WITH TERMINAL 2 HOLE OF 12MM EACH WITH SS / BRASS NUT BOLTS ( CPRI TESTED WITH 20KA PER 1 SEC TO PEAK CURRENT 50KA ) with HIGH GRADE ADVANCED Compound (NABL & IEC 62561-7 TESTED ) Eco Friendly Maintenance Free Earthing Compound to enhance Soil Conductivity Packed in Eco- Friendly HDPE Laminated Paper Bags. 25Kgs x 2 Paper Bag. ( 0.19 OHMS PER MTR ) including CONCRETE /RCC Earthpit Inspection Chamber Width : 320 mm x 320 mm, Height : 192 mm, Weight : 30 Kgs, Load bearing capacity : 5000 Kgscomplete all as specified, including testing and commissioning complete all as 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, Conductive compound common salt & charcoal dust, Pit chamber, cover, 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 deemed 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.

M & L for construction of platform for transformer having dimension (2100 x 2000 mm) , height 1200 mm and foundation depth of 1200 mm including necessary earth works in any type of soil, 150 mm moorum filling in foundation, 150 mm PCC foundation with M7.5(Nominal mix) using 40 mm nominal size graded crushed stone aggregate, brick work with sub class B brick, non modular sizes as per IS 1077 1992, straight or curved on plan exceeding 6 m mean radius built in cement mortar 1:6, cement plaster 20 mm thick, externally in two coats of 15 mm and 5 mm in cement mortar 1:4. enclosed spaces filled with moorum, 75 mm PCC subbase of flooring with M7.5(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate, 150 mm PCC flooring with M10 (nominal Mix) using 20 mm nominal size graded crushed stone aggregate, finishing exposed faces of concrete surface and plaster surfaces with three coats of white wash, complete all as specified and directed.