CWE/AF AMB/SAR-20/2021-22 REPAIR /MAINTENANCE TO HT OH UG LINE, UG CABLES, TRANSFORMERS, VCBs, AVR ETC AT AF STN SARSAWA UNDER GE (AF) SARSAWA

Amount

Disconnecting HT/LT cables & Earthing connections of burnt /defective transformer of capacity 50KVA to 630KVA, 11KV/433 volts, 3 phase, any make, from pole/floor mounted, taking down from site of installation carefuly with the help of cranes and transporting the same to workshop for repair, opening, draining out transformer oil, dismantling complete & taking out core assembly & removing burntout windings, cleaning /washing of tank removing the dirt sludge and sticky materials from all parts of the transformer including core tank and cooling tubes, removal of damaged parts, dehydrating the core assembly, re-assembling after replacement of damaged parts of the transformer after repairs, making connections and filling dehydradated/fresh transformer oil and testing for all type of tests(routine test & full load test) including transportation back & reinstallation/connection of transformer at site complete all as specified and directed. Notes:- Spare parts shall be measured and paid seperately under respective item of schedule. All parts/components replaced shall be identical to those specified by original manufacturer. Cost of winding including labour cost will be measured & paid separately. The new transformer oil & dehydration of transformer oil shall be measured & paid separately. A Board of Officers shall be appointed by the Accepting Officer for ascertaining the repair work required in transformer and all inventory shall be prepared in presence of Engineer-in-charge & Contractor.

M&L for re-winding of transformer any capcity at LT side with copper strip of suitable size / gauge, fixing the coil in the position in core assembly and making connection as per original pattern including providing insulation, complete all as specified & directed. Note: The quantity of winding shall be assesed by BOO.

M&L for re-winding of transformer any capcity at HT side with super enamelled copper wire of suitable size / gauge, fixing the coil in the position in core assembly and making connection as per original pattern including providing insulation, complete all as specified & directed. Note: The quantity of winding shall be assesed by BOO.

S&F in replacement Tap changer switch suitable for transformer 50KVA to 200KVA complete all as specified & directed.

S&F in replacement Tap changer switch suitable for transformer 250KVA to 630KVA complete all as specified & directed.

Material and labour in replacement oil temperature gauge /thermometer suitable for transformers of any make,model , location etc with shape and size as existing at site complete all as specified and directed.

S&F in replacement of worn out HT bush assembly made out of brass with heavy duty brass complete with brass spindle, nuts, bolts, washers etc without bushing insulators all as per existing size, shape and length suitable for 50KVA to 63 KVA capacity transformers complete all as specified and directed.

Description all as per BOQ item No. 7.00 here-in-above but for 100 KVA to 200 KVA capacity transformers.

Description all as per BOQ item No. 7.00 here-in-above but for 250 KVA to 600 KVA capacity transformers.

S&F in replacement of worn out LT bush assembly made out of brass with heavy duty brass complete with brass spindle, nuts, bolts, washers etc without bushing insulators all as per existing size, shape and length suitable for 50KVA to 63 KVA capacity transformers complete all as specified and directed.

Description all as per BOQ item No. 10.00 here-in-above but for 100 KVA to 200 KVA capacity transformers.

Description all as per BOQ item No. 10.00 here-in-above but for 250 KVA to 600 KVA capacity transformers.

Supply and fixing in replacement 11 KV porcelain bushing insulators for HT side, outdoor/indoor type transformer of capacity 50KVA to 63KVA as per IS-2099 of1973 complete all as specified and directed.

Description all as per BOQ item No. 13.00 here-in-above but transformer of capacity 100KVA to 200KVA

Description all as per BOQ item No. 13.00 here-in-above but transformer of capacity 250KVA to 630KVA

Supply and fixing in replacement 433 volt porcelain bushing insulators for LT side, outdoor/indoor type transformer of capacity 50KVA to 63KVA complete all as specified and directed.

Description all as per BOQ item No. 16.00 here-in-above but transformer of capacity 100KVA to 200KVA

Description all as per BOQ item No. 16.00 here-in-above but transformer of capacity 250KVA to 630KVA

S&F in replacement cork sheet gasket, 6 mm thick, superior quality, on top cover plate of the transformer 50KVA to 630 KVA complete all as specified and directed.

Supply and fixing in replacement gun metal globe or gate valve 20/25 mm bore,ISI marked,class-2 with spindle and iron wheel head, screwed both ends for iron pipe with & including fittings and fixtures complete all as specified and directed.

Taking down/out old unservieable air break gang operated switch,removing GOD including supply and installing Switch Air break gang operated, triple pole, for horizontal or vertical operation, mechanically operated, mounted on 12 insulators and steel frame with operating mechanism & operating rod of 25mm bore, medium grade GI pipe from ground level with locking arrangements, 200 Amps rating 11000 volts working pressure including making electrical connections to make it functional after testing complete all as specified and directed.

S&F in replacement HT/LT side cable box cover plate made out of MS sheet of 16 SWG complete with nuts, bolts, washers suitable for indoor/outdoor type transformer of capacity 100KVA to 630KVA complete all as specified and directed.

Taking out breather from the transformer of any make, capacity 50KVA to 63 KVA , removing of mostorized/unserviceable silica gel with and including supply and pouring silica gel breather with fresh deep blue coloured silica gel all as per existing at site complete all as specified and directed.

Description all as per BOQ item No. 23.00 here-in-above but transformer of capacity 100KVA to 200KVA

Description all as per BOQ item No. 23.00 here-in-above but transformer of capacity 250KVA to 630KVA

Disconnecting of all HT/LT cable & earthing connections of transformer of capacity 50KVA to 63KVA , 11KV/433volt, 3 phase, any make, from pole/floor with the help of crane to carryout overhauling of transformer comprising of following services complete all as specified & directed:- (i) Opening of top cover, disconnecting winding connection from bushing and taking out carefully core assembly complete with winding (ii) Draining out of transformer oil from chamber (iii) Checking compactness of core & tightening the same wherever required (iv) Chemical washing of winding to remove dirt, dust & carbon particles. (v) Cleaning of oil tank to revmove oil sludge followed by painting inner surface of tank with zinc chromate base paint (vi) Refixing of core & winding assembley and making connection with HT/LT bushing (vii) Replacement of worn out gaskets nut/bolts with new one. (viii) Refilling the transformer oil after filtering/dehyderation or filling new transformer oil. (ix) Satisfactory testing of transformer on full load. Note: The new transformer oil & dehydration of transformer oil shall be measured & paid sepratrly.

Description all as per BOQ item No. 26.00 here-in-above but transformer of capacity 100KVA to 200KVA

Description all as per BOQ item No. 26.00 here-in-above but transformer of capacity 250KVA to 630KVA

Dehydration/centrifuging transformer oil by means Ultra High Vaccum double stage machine to remove impurities from oil such as moisture, dirt, air and other gases at site of installation in running condition of transformer including testing the oil before and after centrifuging from top and bottom of transformer to achieve the BDV value 45KV(rms) at 2.5mm air gap complete all as specified and directed. Note:- Oil Test value record register shall be prepared in presence of AGE/JE and handed over the register to sub divn on completion of work.

Supply only transformer oil of dielectric strength not less than 60 BDV to comply IS-335 of 1993 complete all as specified and directed.

Preparation of external surfaces of transformer of capacity 50KVA to 200 KVA for painting including fins/radiators, removal of all rust/oil/grease and unwanted material and applying two coats of synthetic enamel metallic paint, smoke grey, by means of spray gun at site of installation of transformer including writing SM/MES number, capacity of transformer etc with black synthetic enamel paint complete all as specified and directed.

Description all as per BOQ item No. 31.00 here-in-above but transformer of capacity 250KVA to 315KVA

Description all as per BOQ item No. 31.00 here-in-above but transformer of capacity 630KVA & above

Cleaning and preparation of surfaces of HT steel tubular poles with emery paper, filling the voids with suitable filler materials and applying two coats of aluminium paint over a coat of zinc oxide primer to poles, cross arms, brackets, hooks, junction box, stay clamps with and including making blue & white strip 30cm wide (5 Nos) upto 1.5 mtrs from PCC coping and marking the numbering on poles with synthetic enamel paint complete all as specified and directed.

Cleaning and preparation of surfaces of HT PCC poles with emery paper, filling the voids with suitable filler materials and applying two coats of exterior cement base paint over a coat of primer to poles (entire pole except where enamel paint appllied) and applying two coats of aluminium paint over a coat of red oxide primer to poles(below the cement base paint), cross arms, brackets, hooks, junction box, stay clamps , and making blue & white strip 30cm wide (5 Nos) upto 1.5 mtrs from PCC coping and marking the numbering on poles with synthetic enamel paint complete all as specified and directed.

Cleaning and preparation of surfaces of angle iron by emmery paper and applying two coats of synthetic enamel paint over a coat of zinc oxide primer to angle iron and two coats of aluminium paint over a coat of red oxide primer to chain link fencing around the transformer yards with and including applying two coats of exterior cement base paint over a coat of primer to external surfaces of transformer's platform including stairs etc complete all as specified and directed.

Cleaning and prepartion all metal parts of 33/11 KV main receiving station and applying two coats of aluminium paint over a coat of zinc oxide primer including painting to CT's/GODs, chain link fencing,angle iron posts around the transformer yards with and including applying two coats of exterior cement base paint over a coat of primer to external surfaces of transformer's platform including fire walls etc complete all as specified and directed.

Supply, laying, jointing, testing and commissioning HT XLPE cable (heavy duty), 11000 volts (earthed), cross sectional area 95 Sqmm, 3 core, insulated, screened, sound compacted aluminium conductor, screening with extruded semi conducting layers, insulation screening with copper tape covers laid up with PVC (ST-2), extruded inner sheathed GI strip armoured PVC (ST-2) out sheathed, ISI marked with IS-7098 Part II with amendment, laid in trenches /pipes /ducts /along poles/ walls/ equipment etc including taking out/down of old unserviceable HT cable from existing site complete all as specified and directed. Notes:- (i) Cable shall be of manufacturing date not earlier than Mar 2021. All the cable shall be embossed with year of manufacturing, meterage at every metre, in addition to its own standard markings as per IS i.e. Size, voltage etc. (ii) Excavation & earth work, sand cushioning, protection pipes, end termination joints & protection covers shall be measured and paid separately. (iii) No straight through joint shall be permitted in less than single drum length. (iv) The contractor shall produce original purchase vouchers duly machine numbered alongwith excise duty gate pass of factory for verification and record. (v) Cable shall be tested in the presence of rep of Accepting Officer at the factory premises and by the rep of GE/GE after laying in the trenches & before returning filling in the trenches.

Excavation in trenches not exceeding 1.5mtr wide and not exceeding 1.5mtr in depth for foundation etc or for walls, shafts, manholes not exceeding 10 sqm on plan or for laying pipes/cables etc and getting out, in soft/loose soil complete all as specified & directed.

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

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

Supply and laying old size, common burnt clay, sub class 'B' bricks, designation 75, laid flat for protection of cable , adjacent to each other, perpendicular to central axis of cable complete all as specified and directed.

Material and labour Sand cushioning to cable with a layer of sand 8 cm deep before laying the cable and 15 cm deep after laying the cable (punned down to 18 cm depth after laying and stretching of cable ) complete all as specified and directed.

S&F cable route indicator, showing 'MES HT' under ground cable" and arrow mark painted with two coat synthetic enamel paint over & including a coat of zinc oxide primer, made out of MS plate of size 200mm x 200mm, 6mm thick fixed on MS flat of size 25mm x 4mm, 600mm long, including cutting, chasing, drilling, welding etc.(whichever required) and embedded in PCC block 1:3:6, type C-2 of size 30x30x30 cm in the ground including excavation and earth work complete all as specified and directed.

M&L in replacement double wall corrugated (DWC) HDPE pipe outer dia 90mm & inner dia 75mm as per IS 14930(part-2):2001 with end cap as in trenches, under road, under floor, fixed to wall with fixing arrangement with suitable size of MS clamps made from 40x3 mm size flat iron including nuts,bolts & washers or along the pole with fixing arrangement etc for cable protection complete all as specified and directed .

Supply and fixing in replacement cable jointing kit for 11000 volt earthed grade, straight through, end termination heat shrinkable type joints with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95sqmm complete all as specified and directed.

Supply and fixing in replacement cable jointing kit for 11000 volt earthed grade, outdoor type, end termination heat shrinkable type joints with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50sqmm to 95sqmm complete all as specified and directed.

Supply and fixing in replacement cable jointing kit for 11000 volt earthed grade, indoor type, end termination heat shrinkable type joints with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50sqmm to 95sqmm complete all as specified and directed.

Cutting the worn out/unserviceable lugs from the cables upto 50 Sqmm size with and including supplying and fixing lugs after cutting the worn out /faulty cable end from HT/LT side of transformer /LT pillar/panel box including necessary earth work for taking out the cable from loop, returning filling etc and providing aluminium lugs lead including crimping with crimping tools in the existing LT cable and making necessary connections to make it functional complete all as specified and directed.

Description all as per BOQ item No. 49.00 here-in-above but cables of size 70 Sqmm to 120 Sqmm.

Description all as per BOQ item No. 49.00 here-in-above but cables of size 150 Sqmm to 185 Sqmm

Description all as per BOQ item No. 49.00 here-in-above but cables of size 240 Sqmm to 300 Sqmm

Supply and fixing composite polymer 11 KV, pin insulator alongwith pin 260 mm long creepage distance 320 mm PF dry/wet withstand voltage KV/mint 65/40 after taking down/out insulator as existing at site complete all as specified and directed.

Supply and fixing pin type insulator capacity 33000volt after taking down/out insulator as existing at site complete all as specified and directed.

Supply and fixing post type insulator capacity 33000 volt after taking down/out insulator as existing at site complete all as specified and directed.

Supply and fixing in replacement HT lightning arresters for outdoor use, non-liner resistor type, horn gap and choking coil, maximum working pressure 11000 volts complete all as specified and directed.

Supply and fixing lightening arrestor HT 33 KV, 10 KA, station class after taking down/out arrestor as existing at site complete all as specified and directed.

Supply and fixing in replacement Lightning arrestor (set of three), HT metal oxide surge arrester polymeric type complete with all fittings, rated voltage 12 KV, 5 KA contineous operating voltage 10.2 KV maximum residual voltage at 8/20 impulse 38.4 KV lightening impulse withstand at 1.2/50 impulse 75 KV etc complete all as specified and directed.

Supply and fixing in replacement 33KV, 10 to 25 Amp D.O. fuse complete all as specified and directed.

Supply and fixing in replacement 33 KV, 30 Amp D.O. fuse complete all as specified and directed.

Supply and fixing in replacement 33 KV, 40 Amp D.O. fuse complete all as specified and directed.

Supply and fixing in replacement 11KV, 10 to 25 Amp D.O. fuse complete all as specified and directed.

Supply and fixing in replacement 11KV, 30 Amp D.O. fuse complete all as specified and directed.

Supply and fixing in replacement 11KV, 40 Amp D.O. fuse complete all as specified and directed.

M&L in replacement true vertical steel tubular, swaged welded pole conforming to IS-2713 part II , type 410 SP 55, 11 metre long complete with mild steel base plate of 6 mm thick of size 300 X 300 mm, finial taper plug, cap, bolts, nuts, washer and screws hole of required size and Nos. for fixing cross arms including painting externally with two coats of aluminium paint over & including one coat of zinc oxide primer for exposed surface and two coats of black bituminious paint for embeded portion in concrete as well as throughout internally including provision of white & blue colour strips with fluorescent paint upto 1.5 mtr height & nubmering of pole complete all as specified and directed. Note:- Excavation, earth work and PCC shall be measured and paid separately.

Material and labour for PCC 1:4:8, type D-2 using 40 mm graded mechanically crushed stone aggregates as in foundations, filling and mass concrete etc complete all as specified & directed.

Material and labour PCC 1:3:6, type C-2, using 40 mm graded mechanically crushed stone aggregates as in foundations, filling and mass concrete etc complete all as specified & directed.

Material and labour PCC 1:2:4, type B-1, using 20 mm graded mechanically crushed stone aggregates as in coping to pole/stay/panel etc including necessary formwork to exposed surface finished even & smooth complete all as specified & directed.

Supply and fixing ACSR conductor,steel reinforced,Weasel, Beaver, Ferret, Mink including stretching on insulators with aluminium taps, jumping, binding on poles with minimum sag including binding wire, jointing sleeves, and PG clamps of suitable size after taking down/out conductor as existing at site complete all as specified and directed. Notes :- The rates quoted includes (i) Jumper on cutout point,2 pole/4 pole structure shall be provided with PVC sleeves . (ii) Cutting of branches of trees coming across the OH line.

Supply and laying GI steel earth wire 4 mm dia on existing Steel/PCC poles including binding on insulators with aluminium tap, jumpering etc after taking down/out wire as existing at site complete all as specified and as directed.

Supply and fixing cross arms, bracings, supports,clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and applying two coats of aluminium paint over & including one coat of zinc oxide primer after dismantling of old unserviceable cross arm as existing complete all as specified and directed.

Supply and fixing anti climbing device ,spikes type fabricated out of MS bars ,round square and flat with and including providing required nuts ,bolts,washers etc., welding in two halves, made to shape, to suit the cross section of the pole and applying two coats of aluminium paint over & including one coat of zinc oxide after dismantling of old unserviceable climbing device as existing complete all as specified and directed.

M&L in replacement 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, fixed with MS clamps ,bolts and nuts, for HT of 25 cm x 20 cm size as per SSR Part-I 2009 complete all as specified and directed.

M&L in replacement 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, fixed with MS clamps ,bolts and nuts, for HT of 60cm x 30cm size as per SSR Part-I 2009 complete all as specified and directed.

Servicing and repairing of VCB's of capacity 630/ 400 amps from the OEM, replacing unserviceable spare parts ,check all contacts are tight, clean , lubricate the mechanism including calibration by authorised technician and other friction points,lubricating spring guides,guide bolts (use light oil or lithium grease), checking the trip/closing coil plunger moving freely,isolating contacts and other current carrying parts are in normal condition,tightness of all the current carrying parts particularly the bus bars inside the panel,clean the insulator surfaces,check for any signs of over heating complete all as specified and directed. Notes:- (i) Spare parts shall be measured and paid separately. (ii) After completion of work necessary service report shall be submitted by the contractor. (iii) The servicing shall be done through rep of OEM.

Taking out old unserviceable motor from VCB, 11 KV by isolating the incoming HT supply,removing motor from the site including supply and fixing motor for VCB, 11 KV as per existing size,rating etc complete all as specified and directed.

Supply and fixing in replacement of T & C switch as existing for VCB 11 KV complete all as specified and directed.

Supply and fixing in replacement three phase Amp meter ranging from 0-100 Amps digital type complete all as specified and directed.

Supply and fixing in replacement three phase Voltmeter ranging from 0-15 KV digital type complete all as specified and directed.

Supply and fixing in replacement LED indicator lamps set (RED / YELLOW / BLUE) complete all as specified and as directed.

Supply and fixing in replacement CTs ratio 60-30/ 5 A +5,class I, 26.3 kA, type ECTT 3, for out going feeders complete all as specified directed.

Supply and fixing in replacement CTs ratio 100-50/ 5 A +5 class I, 26.3 KA, type ECTT 3 for out going feeders complete all as specified and directed.

Supply and fixing in replacement reverse motor for VCB Cap, 630/400 Amps,150 watt,230 Volts, type PM R5 complete all as specified and directed.

Supply and fixing in replacement 11 KV, single phase, indoor resin cast, PT of ratio 11 KV/rt 3/110V/rt 3/110V/rt 3, Class 0.5-3, Burden 50 VA - 50 VA, insulation level 28/75 KV, voltage factor 1.2 Cont and 1.9 for 30 Sec, conforming to IS-3156 complete all as specified and directed.

Supply and fixing in replacement anti tamper feature meter for HT panel, full four quardant operations of trivector meter of 11 KV having configurable multiple functions such as display of power factor, frequency, load in amps, voltage etc. after taking down/out cross arms as existing at site complete all as specified and directed. Make :- L&T Model No WR300BC5200 or equivalent of make as specified

Supply and fixing 3 phase over current and earth fault relay with instantanteous high set functions after taking down/out relay as existing at site complete all as specified and directed. Make L&T Model No MC61A-nX or equivalent in Legrand and Crompton Greaves.

Material and labour for rewiring of 1 MVA and 2 MVA transformer incomer breaker panel with lugs and thimbles, as per existing size & gauge , capacity of wires, replacing defective small parts aur relays in replacement including testing complete all as specified and directed. Note: Testing report should be submitted by the contractor before claiming any payment.

Opening of 1 MVA & 2 MVA transformer all type of wiring /nuts,bolts etc, repair & servicing of ABB make SF6 33 KV, HT breaker including changing spring and the all other faulty/defective parts, charging and discharging of breaker, CAM locking arrangements from OEM i.e. ABB complete all as specified and directed.

Supply and fixing in replacement tripping coil of SF6 33 KV HT breaker of make ABB after taking down/out coil as existing at site complete all as specified and directed.

Calibration and testing of 11 KV power factor panel including replacement of small defective parts complete all as specified and directed.

Supply, laying, jointing, testing and commissioning LT XLPE electric cable, 1100 Volts grade, heavy duty, PVC insulated and sheathed armoured electric power cable with stranded aluminium conductor, of cross sectional area 185 sqmm 3.5 core conforming to IS- 7098 (Part I) 1988 as in trenches or along the wall/pole through pipe etc, including taking down/out old unserviceable LT cable complete all as specified and directed. Note:- Excavation & earth work, sand cushioning, protection pipes, end termination joints & protection covers shall be measured and paid separately.

Servicing and maintenance of 2000 KVA, 33/11 KV AVR replacing all faulty, relays and card and cleaning of complete AVR by OEM of company representative and draining out transformer oil from AVR, repair/replace gasket, bushing packing and rectifying leakage including S&F of follwoing items and testing of AVR system at no laod and on load complete all as specified and directed. (i) Terminal board 12 Nos holes and size is 600mm x 400mm x 100mm - 01 Each (ii) 12mm studs copper 4" with nuts, washer complete set - 12 Nos (iii) Copper lugs 50sqmm - 30 Nos (iv) Copper lugs 70sqnn - 20 Nos (v) 35sqmm flexible copper cable single core - 30 RM Note:- The test shall be carried out by the rep of OEM in the presence of Engineer-in-charge/GE and report shall be submitted by the contractor before payment.

M&L earthing complete with galvanized steel earth plate electrode 60 cm X 60 cm X 6 mm thick buried vertically in ground to depth not less than 2.25 mtr below ground level, with top edge of earth plate not less than 1.5 mtr below ground level, connected to GI earth lead strip 32 mm x 6 mm upto 7.5 mtr long by means of bolts, nuts, check nuts and washers of galvanized iron and connection to earthing test point & earth dolly & watering pipe GI 20 mm bore, light grade including protection pipe GI light grade 40mm bore , wire mesh, funnel,lugs, salt, charcoal dust, excavation & earthwork in soft/losse soil and refilling pit chamber with PCC 1:2:4 type B1 using 20 mm graded mechnically crushed stone aggregates , RCC 1:2:4 type B-1 using 20 mm graded mechnically crushed stone aggregates pit cover slab 50 mm thick reinforced with 8 mm dia TMT bars @ 15 cm c/c both ways including necessary form work all as shown in electrical plate No 3 of SSR part-I (2009), including testing on completion at site including taking out/down of old earthing any type complete all as specified and directed.

S&F in replacement 32mm x 6mm GI strip as earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing complete all as specified and directed.

S&F in replacement Copper strip 32mm x 6mm with saddles and fixing screws etc. for roof conductors and down conductors buried in ground complete all as specified and directed.

S&F test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed with and including 3 nos, 8mm dia, 25mm long hexagonal head screw complete all as specified and directed.

Supplying, installation, testing and commissioning of advance maintenance free environment freindly ring earthing system of dia 350mm & depth 11 feet chemical earthing system consisting of 3 Nos. of Copper Bonded Earth Rod of 10 feet length, 17.2 mm dia made of high tensile low carbon steel circular rods, molecularly bonded with 99.9% electrolytic grade copper on outer surface (minimum copper bonding thickness-250 microns) with terminals to connect incoming stip in the ground with 3 bags (60 Kg per earthing pit) of environment friendly backfil compound carbon base, Graphite blend and portland cement mixed (approved by Engr-in-charge) resistivity below 0.15 Ohm meter for high currect (for electrical system) as per manufaccturing instructions for each 150mm x 25mm x 6mm copper bar with 4 hole shall be exothermically welded on top to copper bounded rod to make terminal laid in minimum 200mm dia bore. Making 3 Nos holes of complete earthing set in which each hole should be provided with 100 Kg Bentonite in outer 150mm part of the hole and inner 200mm dia fill with back fill material. Manufacturer name shall be embossed on rod. 25mm x 3mm copper shall be burried 20cm below the ground used to interconnected the earths and to make the ring. The earth pit cover polypropylene (250mm top x 340mm bottom x 250mm height) of 2 Kg weight shall be included in the csope of work including PCC (1:2:4) base block of fitting of pit cover including taking out/down of old earthing any type complete all as specified & directed by Engineer - in- charge. Notes : The testing of earth resistance will be done in presence of MES rep and user and results will be recorded in register duly signed by user and Engg in Charge. contractor will arrange all necessary T&P for testing of earth and contractor will be fully responsible for testing of earth resistance, maintaining the record and maintain the earth value with in permissible limit. In case desired resistance not obtained during testing, the earthing shall be re-done without any cost to the Govt.

For Credit Schedule refer tender documents.

Balraj and Co

SHRI RAM ENTERPRISES