REPAIR/MAINT OF HT 11 KV TRANSFORMER ,GOD ,VCB , RMU,OVERHEAD LINE,UNDER GROUND CABLE AND OTHER CONNECTED WORKS AT AF STATION GORAKHPUR

Amount

Excavation in trenches , not exceeding 1.5 m wide and not exceeding 1.5 m in depth for founddation etc and getting out in soft/loose soil complete all as specified and as directed.

Returning, filling in, including spreading levelling watering and well ramming in layers not exceeding 25 cm as in soft/loose soil complete all as specified and as directed.

Removing excavated soil to a distance not exceeding 50 m and depositing where directed at a level not exceeding 1.5 m above the starting point complete all as specified and as directed.

M&L for sand cushioning for under ground cable with locally available sand for protection of cable 8cm before laying cable and 15cm deep over the cable including spreading and consolidation complete all as specified and as directed. Note:-Punned thickness shall be measured for payment purpose.

Supply & laying factory made precast concrete cable cover class HV type 2 flat, size 450mm x 180x40mm complete all as specified and as directed.

Laying only old serviceable precast concrete cable cover or bricks sub class 'B' of any size and pattern complete all as specified and as directed.

Taking out old existing 95 Sqmm, 3 core XLPE , HT underground cable from trench and relaying HT cable after necessary repair complete all as specified and as directed.

Taking out old existing 120 Sqmm, 3 core XLPE , HT underground cable from trench and relaying HT cable after necessary repair complete all as specified and as directed.

Taking down existing unserviceable PVC/XLPE HT cable of size 95 to 120 Sqmm 3 core from trench or on pole etc as decided by Engineer-in-Charge complete all as specified and as directed.

Supply, laying and testing in replacement of XLPE insulated screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable, heavy duty with aluminium conductor 11000 volts grade,Earthed conforming to IS :7098(part II) cross sectional area 95 sqmm 3 core complete all as specified and as directed.

Supply, laying and testing in replacement of XLPE insulated screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable, heavy duty with aluminium conductor 11000 volts grade,Earthed conforming to IS :7098(part II) cross sectional area 120 sqmm 3 core complete all as specified and as directed.

S&F in 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 95 sqmm complete all as specified and as directed.

S&F in 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 complete all as specified and as directed.

S&F in 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 240 to 300 sqmm complete all as specified and as directed.

S&F in replacement of cable jointing kit for 11 KV (earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm.complete all as specified and as directed.

S&F in replacement of cable jointing kit for 11 KV (earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185sqmm.complete all as specified and as directed.

S&F in replacement of cable jointing kit for 11 KV (earthed) grade cable for indoor tremination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm complete all as specified and as directed.

S&F in replacement of cable jointing kit for 11 KV (earthed) grade cable for indoor tremination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185sqmm.complete all as specified and directed.

S&F in replacement of Tap position indicator meter in Auto tap or on load Tap changer suitable for 33 KV complete all as specified and directed.

Dismantling of unserviceable insulators of any type or size and removal from site complete all as specified and as directed.

S&F Pin type porcelain, vitreous, white, brown or green insulators including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nuts, 150 mm height 150 mm dia for 11000 volts grade complete all as specified and as directed.

S&F Disc type insulator, porcelain, vitreous white brown or green insulators for working pressure 11000 volt of 145 mm height 255mm dia ball and socket type Two-in-series assembly for tension with tension clamp for conductors including bolts, nuts & washers .complete all as specified and as directed.

Dismantling of unserviceable air break gang operated switch 11000 volts grade from overhead HT line structure vertical or horizontal mounted including insulators and operating mechanism complete all as specified and as directed.

Supply, installation, commisioning and testing 11 KV outdoor type Air break, gang opearted switch, 12 insulator, triple pole vertical type mechanically operated, mounted on insulators and steel frame, with operating mechanism worked from ground level with 25mm dia galvanised iron pipe medium grade operating rod of suitable length as required at site for current rating upto 400 Amps with dropout fuse complete all as specified and as directed.

S&F in replacement of lightning arrestor non linear resistance type confirming to IS-3070 Part 1 complete with all fittings, transmission class, discharge capacity 65 Kilo Amp suitable for 11 KV including all clamps, nuts, bolts and washers complete all as specified and directed.

S&F in replacement of 80 mm dia galvanized iron tube light grade for cable protection along poles, laid plinth protections or road crossing or in trenches or in footpath with necessary fittings complete all as specified and as directed.

Boring (horizentally) under road and foot path at 1.00 to 1.50 metre depth for inserting 80 mm bore galvanised iron tube for drawing under ground cable complete by mechanical means without disturbing road surfaces complete all as specified and as directed.

Detecting of fault of HT UG cable of any size and core with help of vehicle mounted cable fault locator device including detecting exact location of cable fault for rectification complete all as specified and as directed. Note:- Cable fault locator machine shall be arranged by the contractor under his own arrangement as per direction of Engineer-in-Charge.

Restringing of existing loose or sagged ACSR over head HT conductor of any type and size including supply and fixing new binding wire or aluminum tape of required size, opening from insulators as fixed on pole after taking proper electric shut down from concerned Engineer-in-Charge including taking down conductor from OH line and proper binding complete all as specified and as directed.

Disconnecting and taking out existing HT 11 KV C&R Panel from housing and calibration and testing of 33 KV Panel digital combined inverse time over current and earth fault instanteneous relay checking and ensure physical healthyness with visual check for healthy tripping of over current and earth fault,cleaning and overhauling the mechanical parts including oiling, replacement of unserviceable trip coil, relay and DC motor 24 volt and checking of all relay and making functional as necessary and re-assembling the same after replacement of unserviceable parts as required to make the Panel serviceable including making all electrical connection and testing complete all as specified and as directed.

Calibration and testing of 33 KV, SF-6 VCB remote panels combined Inverse time over current and instantaneous relay checking and cleaning/ decorbonising its moving and fixed contacts and ensure physical healthyness with visual check for healthy tripping of over current and earth fault , adjust tripping time , flag setting , ratio setting, instantaneous time setting etc as per installed capacity of transformer to be saved on max. short cuircuit current with considering of percentage impedance of transformers with artificial current injuction on primary side with current injuction machine checking of proper functioning of alarm and physical alarm and tripping verification of WTI and OTI, Oil low level alarm, bucholz alarm and trip , ensuring smooth functioning of VCB from local and remote switch complete all as specified and as directed.

S&F breaker charging motor including gear assembly (as per sample) suitable for 220/110 volt AC of 11 KV VCB (SF6) panel complete all as specified and as directed,

S&F 24 Volt battery including Charging assembly (power pack) as per sample suitable for 220/110 volt AC of 11 KV VCB (SF6) panel complete all as specified and as directed.

S&F in repair of 33 KV,oil cooled ,contineous duty ,dual core,accuracy class 1,rated output (burden) -15 VA, insulation level 36 kVp ,short time current rating 26.3 KA for 1 sec ,dynamic current rating 65.75 KAp , copper wounded type ,outdoor CT 100-50 A/5A+5A ratio as per IS 2705-1992 complete all as specified and as directed.

S&F in repair of 33 KV, oil cooled outdoor PT 110V,single phase duty contineous ,highest system voltage 36 KV,rated frequency 50 HZ , No of core 2 , accuracy class 0.5 burden 200VA ,copper wounded , material of bushing porcelain ,as per IS 3156-1992 (as per sample) complete all as specified and as directed.

S&F in repair of 11 KV, indoor PT, epoxy diecast ,output 110 V ,50 VA burden, accuracy class 0.5 suitable for SF6 VCB (as per sample) complete all as specified and as directed.

Supply and fillig or Top up of SF6 Gas charging in 11 KV SF6 Panel complete all as specified and as directed

Supplying and erecting of steel tubular swaged type seamless pole confirming IS-2713 part ( I to III) 1980 specification complete with base plate, welded top cap over all vertical length11.00 m type 410-SP-55 , painted internally with two coats of bituminous paint through out and externally two coats of aluminium paint over one coat of red oxide primer including necessary excavation and earth work, PCC 1:4:8 type D-2 using 40 mm graded stone aggregate in foundation and coping in PCC 1:3:6 type C-1 using 20 mm graded stone aggregate with necessary use and waste of form work above ground level , disposal of surplus soil to a distance not exceeding 50 m including provision of black and yellow strip or as per direction of Engineer-in-charge on poles up to 1.5 m high above coping level and numbering of poles including taking down existing unserviceable pole complete all as specified and as directed.

M&L cement concrete 1:3:6 type C-2 using 40mm graded stone aggregate as in foundation, filling and mass concrete of poles or stay assemblyor panels etc complete all as specified and as directed.

M&L cement concrete 1:2:4 type B-1 using 20mm graded stone aggregate as in coping to pole including necessary use and waste of form work complete all as specified and as directed.

M&L applying one coat of aluminium paint including preparation of old painted steel surface for 4 pole structure ( above planting depth ) 11 m long steel tubular pole and mild steel work i.e. cross arms, bracing , clamps etc complete all as specified and as directed.

M&L applying one coat of aluminium paint including preparation of old painted steel surface for 2 pole structure ( above planting depth ) 11 m long steel tubular pole and mild steel work i.e. cross arms, bracing , clamps etc complete all as specified and as directed.

M&L applying synthetic enamel paint in yellow and black alternate strip 30 cm wide 5 Nos or as ordered by Engineer-in-Charge on poles up to 1.5 m high above coping level and numbering with writing letters or figures ( Block ) , height not exceeding 30 mm high and letters or figures not exceeding 10 Nos for electric LT/HT pole / strut complete all as specified and as directed.

M&L applying one coat of aluminium paint on steel tubular pole ,11 m long , vertical to the portion of 1.5 m above the coping complete with cross arms including preparation of old painted surfaces of pole and cross arms complete all as specified and as directed.

Earthing complete with galvanized steel earth plate electrode 60cmx60cmx6mmthick, buried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edged of the plate not less than 1.5 m below ground level connected to galvanised iron earth strip of size 32mmx6mm by means of bolt, nuts, check nuts and washer of galvansed iron or steel, protected by galvanised iron pipe of 40 mm bore medium grade including funnel, 20mm dia bore galvanised iron pipe medium grade for watering, wire mesh, adequate quantity of charcoal dust and common salt in alternative layers all around the earth electrode compacted thickness 15 cm including excavation and earth work in soft/loose soil, PCC 1:3:6 type C-1 using 20 mm graded aggregate as in chamber, 50 mm thick RCC 1:2:4 type B-1 using 20 mm graded stone aggregate as in cover reinforced with 8 mm TMT bar @100 mm C/C complete and testing on completion complete all as shown in electrical plate No. 3 of MES SSR Part-I 2009. Note :- Cost of earth strip and GI protection pipe up to a distance 7.5 metre shall be included in the quoted rate.

Earthing complete with copper earth plate electrode 60cmx60cmx3 mm thick, buried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edged of the plate not less than 1.5 m below ground level connected to copper earth strip of size 32mmx6 mm by means of bolts, nuts, check nuts and washer of galvanized iron or steel, protected by galvanised iron pipe of 40 mm bore medium grade including funnel, 20mm dia bore galvanised iron pipe medium grade for watering, wire mesh, adequate quantity of charcoal dust and common salt in alternative layers all around the earth electrode compacted thickness 15 cm including excavation and earth work in soft/loose soil, PCC 1:3:6 type C-1 using 20 mm graded aggregate as in chamber, 50 mm thick RCC 1:2:4 type B-1 using 20 mm graded stone aggregate as in cover reinforced with 8 mm TMT bar @100 mm C/C complete and testing on completion complete all as shown in electrical plate No. 3 of MES SSR Part-I 2009. Note :- Cost of earth strip and GI protection pipe up to a distance 7.5 metre shall be included in the quoted rate.

S&F in replacement of 11 KV HT ceramic bushing of transformer 11 KV/433 volt indoor or outdoor of various capacities as per site requirement including testing complete all as specified and as directed.

S&F in replacement of ceramic bushing LT side of transformer 11 KV/433 volt indoor or outdoor of various capacities ie upto and including 160 KVA including testing complete all as specified and as directed .

S&F in replacement of ceramic bushing LT side of transformer 11 KV/433 volt indoor or outdoor of various capacities ie above 160 KVA including testing complete all as specified and as directed.

S&F in replacement of 11 KV HT bushing rod of brass both ends threaded including nut, check nut and washer of transformer 11 KV/433 Volt indoor or outdoor of various capacity including porcelain insulators,gaskets including testingcomplete all as specified and as directed.

S&F in replacement of gasket set of synthetic rubberized cork sheet 10 mm thick for transformer top lid cover suitable for transformer of capacity upto 160 KVA complete all as specified and as directed.

S&F in replacement of gasket set of synthetic rubberized cork sheet 10 mm thick for transformer top lid cover suitable for transformer of capacity above 160 KVA complete all as specified and as directed.

M&L applying two coat of aluminium paint including preparation of old steel surfaces of steel structure frame for 33 KV Isolator, DO fuse, TCs, OCBs, PTs, LA , gantry , main bus supports tec at 33/11 KV MRS VIJAY VIHAR complete all as specified and as directed.

M&L applying two coat of heat resistance paint (smoke gray) by spray painting machine to transformer including preperation of surfaces of transformer by rubbing with emery paper to remove oil strains, dust etc and writing SM/MES No of transformer of capacity upto 200 KVA complete all as specified and as directed.

M&L applying two coat of heat resistance paint (smoke gray) by spray painting machine to transformer including preperation of surfaces of transformer by rubbing with emery paper to remove oil strains, dust etc and writing SM/MES No of transformer of capacity above 200 KVA complete all as specified and as directed.

Dehydration / filteration of transformer oil by means of centrifugal filteration plant to achieve the specified dielectric strength upto 50 KV at 2.5 mm gap in existing position of transformer of any capacity at various sub station complete all as specified and as directed. Note:- Cetrifusing machine shall be arranged by the contractor under his own arrangement as per requirement decided by Engineer-in-Charge.

Supply only transformer oil of approved quality as per IS No : 335-1993 low viscosity type having dielectric strenght of 50 KV in 2.5 mm gap for toping up complete all as specified and directed.

S&F in replacement breather assembly complete with 250 grams silica gel suitable for 100-200 KVA capacity / model of transformer to air column of conservator tank complete all as specified and as directed.

S&F in replacement breather assembly complete with 500 grams silica gel suitable for 33 KV transformer capacity / model of transformer to air column of conservator tank complete all as specified and as directed.

S&F in replacement breather assembly complete with 750 grams silica gel suitable for above 200 KVA capacity / model of transformer to air column of conservator tank complete all as specified and as directed.

S&F aluminium lugs suitable for the 120 Sqmm size cables complete all as specified and as directed.

S&F aluminium lugs suitable for the 95 Sqmm size cables complete all as specified and as directed.

S&F cross arms , bracings, supports, clamps and back plate fabricated from structural sections including nuts, bolts, and washer bending hot or cold , drilling holes for bolts of any size and painting with two coats of aluminum paint over one coat of red oxide primer including preparation of surfaces including taking down existing unserviceable cross arms, bracing , support, clamp etc complete all as specified and as directed .

Supply and filling 63 mm graded stone aggregate over the cleared surfaces at sub station complete all as specified and as directed.

Supply and laying rubber mat of size 1mx2mx2.5 mm thick suitable for 11 KV for laying in sub station complete all as specified and as directed.

Supply only 6 mm thick mild steel chequered plate of size 300mmx750mm conforming to Fe-410 W grade E-250 quality 'A' complete all as specified and as directed.

S&F anti climbing devices,spikes type fabricated out of mild steel bar (round ,square and flat )including nuts ,bolts,washres and welding in two halves made to shape to suite the cross section of the pole complete all as specifiedand directed.

S&F anti-climbing devices comprising 2.24 mm dia galvanised steel 2-strand barbed wire with 2.24 mm dia barbs wrapped spirally around poles , to a length of 0.5 to 1.0 metre clamped and properly secured or as ordered incluing taking down existing unserviceable anti-climbing device complete all as specifiedand directed.

M&L cement concrete 1:3:6 type C-1 using 20 mm graded stone aggregate as in pole coping suitable for round steel tubular of size 450mmX450mmx450mm including necessary use and waste of form work above ground level as in repair complete all as specified and as directed.

M&L required for maintenance and smooth functioning of existing vertical gang operated air break isolators switch outdoor type, 12 insulator double stack, triple pole, rotating type double break per pole. for 11000 volts, 3 phase 50 Hz AC supply system having 200/400 Amp capacity with oiling , greasing, adjustment of lever to make it fully functional complete all as specifed and as directed.

Supply, installation, commissioning and testing of Horn gap fuse , triple pole ,outdoor type fuse link suitable for vertical or horizontal installation, consisting of mild steel channel base , 11 KV post type insulator, complete with fuse , phosphorus bronze contacts complete all as specified and as directed. Note :- MS structure shall be measured and paid for separately under respective item.

S&F PG clamps for jumper connections aluminium die cast with two galvanised iron nuts and bolts suitable for ACSR conductor up to mink on HT / LT overhead lines complete all as specified and as directed.

Trimming of tree branches adjacent to OH conductors 2 m clearances ,girth of tree branch not more than 30 cm from live conductor complete all as specified and as directed.

Surface dressing for area cleaning at Sub Stations including removing herbs,shurbs , grass, removing bricks bats complete all as specified and as directed.

M&L for carrying out servicing of mechanical mechanism and calibration of HT 11 KV VCB/SF6 by drawing out trolly by high skilled mechanic specilist in electric HT breaker line , cleaning dismantling mechanical system , decarbonising of all parts using CRC - 2-26 spray , inspection of all fixed and moving parts , tightning of all nuts & bolts , dressing of contact by using emery paper for fine/ smooth contact , tightning of all connections , checking of allignment for easily moving of breaker , checking of ON /OFF operation with setting of buffer gap adjustment , contact travel contact allignments , rollar gap , hard or light setting of breaker greasing of all moving mechanism complete all as directed in instruction manual of VCBs./SF6 complete all as specified and as directed.

M&L for carrying out adjustment and servicing of 33 KV out door type VCB , 800 Amps by adjustment and servicing of spring operated control mechanism assembly with checking and adjustment of stops , opening springs and shock absorber , loading of the closing spring when circuit breaker close/ open , tripping of the circuit breaker , clearance of the dragging hook and trip coil / close coil , tightning of all connections , oiling/ greasing all moving parts with recomended lubricant for smooth functioning from local and remote panel complete all as specified and as directed.

Supply and replacement self powered digital electronic voltmeter , operating voltage 110V AC ,size 96mmX96 mm ,measuring range 0 to 15 KV , modification with reducing existing panel's window size using 1.6 mm thick mild steel sheet cutting , painting as required, riviting etc complete all as specified and as directed.

Supply and replacement self powered digital electronic ammeter , CT operated with CT , secondary voltage of CT 5A ,size 96mmX96 mm ,measuring range 0 to 150 Amps modification with reducing existing panel's window size using 1.6 mm thick mild steel sheet cutting , painting as required , riviting etc complete all as specified and as directed.

Supply and replacement of shunt trip solenoid coil set complete , varnished ,winding with super enamelled copper conductor with striker pin suitable for 25 V DC/ 110Volts AC / 220 Volts AC , 12.1/22.7 Ohm complete all as specified and as directed.

Supply and replacement of holding solenoid coil set complete , varnished ,winding with super enamelled copper conductor with striker pin suitable for 30 V DC/ 110Volts AC / 220 Volts AC , 12.1/22.7 Ohm complete all as specified and directed.

S&F of fire retardant electric insulated synthetic mat "INSULATICA 2000" FOR 11 KV OF 2.5 mm thick ±10% conforming to BIS : DOC No- ETD-02(5231) P Dt 30-06-2003, metting requirement of IS : 3043, IS : 5216 ( Part 1,2&3), IS : 8437 and IEC 479 Pub-1, IEC 61111 & 61112 tested for brake down strength tensile/Elongation, ageing properties,Insulation resistance, effects of acid, alkaline, Diesel & Transformar oil,leakage current test, fire test etc. Having min width of 1000mm ±20mm complete as required suitable and using adhesive and allied chemical and scaling of all joints and border ends and fixing decorative taps complete all as specified and as directed.

Supply and replacement of Male contact/ moving contact blade made out of Brass alloy, spare for Gang operated air break switches 11 KV voltage , 200 Amps complete all as specified and as directed.

Supply and replacement of female contact/ fixed contact jaw made out of Brass alloy, spare for Gang operated air break switches 11 KV voltage , 200 Amps complete all as specified and as directed.

Supply and replacement of MS jumper carrier, spare for Gang operated air break switches 11 KV voltage , 200 Amps complete all as specified and as directed.

M&L 10 mm thick rendering in cement mortar 1:4 on brick work or concrete surface of ducts, pits etc surface finished even and fair complete all as specified and as directed.

Supply and replacement of electronic hooter 96mmX96 mm size ,30 V DC operated testing 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 clour and fixed with mild steel clamps .bolts and nuts of approved size for HT 250 mmX 200 mm complete all as specified and as directed.

Supply,installation,testing and commissioning , dismentling, decaning oil 11/0.430 KV , 160-250 KVA capacity ,3 phase ,50 HZ ,Vector group Dyn 11 ,Transformer with paper insulated copper winding wire / strip as per original data on HV ( Delta connection ) and LV ( Star connection ) , 7 tapping brought on HV side for tap changer to change ± 2.5 % ±5% ± 7.5% by means of manually operaed OFF LOAD tap changing gear , complete rewinding of HV and LV on three limbs providing other insutation material like spacer , wooden blocks , cottan tape etc. ovening , cork sheet packings, vent diafram , replacement of HV & LV bushing with metal part, replacement of tap changer , drain valves , filling only transformer oil complete , denting and applying two coat spray painting of synthetic enamelled paint after scarpping of old paint by wire brush , degreasing, patches to transformer with radiator , testing of transformer at factory test bench for satisfactory results complete all as specified and as directed. Note :- (i) Additional Transformer oil if required will be measured seperately under respective item. (ii) Cost of Transportation for repair to and from shall be included. (iii) Winding shall be measured and paid seperately under respective item.

Rewinding of LT/HT coil, conforming to the orginal winding of the transformer of 160-250 KVA capacity with super enamelled DPC insulated copper wire/strip of appropriate guage and turns and cutting and moving of burnt winding cleaning of core and drying in oven after assembling including other materials so required complete all as specified and directed.

M&L for cable route indicator embedded in cement concrete 1:4:8 type D-2 using 40 mm graded stone aggregate of size 150mmX150mmX150 mm with cast iron plate 100 mm dia minimum 3 mm thick (round shaped) fixing on mild steel angle 25mmX25mmX4mm of 600 mm length duly painted with two coats of red colour synthetic enamel paint over one coat of red oxide primer and marked with 11 KV HT complete all as specified and as directed.

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