REPAIR AND MAINTENANCE OF HT LINE, VCBs STABILIZER, TRANSFORMER WITH CONNECTED SERVICES AT 213 TRANSIT CAMP UNDER GE NAGROTA

Amount

Calibration to HT VCB 11 KV 3 phase 800 amp 250 MVA installed at main power house after disconnecting the main supply incoming panel for repairs and replacement of unserviceable parts and refixing the same after repair and testing on full load (Cost of spare parts and other job wks will be paid under respective items) complete all as specified and directed :- Note :(a) Rates are deemed to include the cost of all tools, material and labour required for dismantling taking out and assembling of VCB with replacement of worn out nuts and bolts, gaskets, 'A' grade greasing and oiling of moving parts and refixing the same (b) Rates are deemed to include the cost of material and labour required to make alternative arrangement to bypass the electric supply through the HT panel or other HT line to avoid long period of shut down of electric supply.

Opening the VCB and replacing the single phase burnt motor of VCB with appropriate size of motor complete all as directed.

Repair of motor charging gear complete all as directed.

Repair/replacement of lifting lock in and out complete all as directed.

Replacement of burnt trip coil assembly 24 V DC complete

Replacement of burnt closing coil assembly 24V DC complete

Replacement of burnt wiring including cut out switches

Replacement of unserviceable Earth fault overcurrent relay as per sample and make complete all as per specified and directed by Engineer in charge.

Taking down transformer mounted on two/four pole structure or on plateform / indoor floor mounted carefully from their position after removing electrical connection, earthing leads etc, for executing necessary comprehensive preventive maintenance as well as repairs necessiated, including to and fro transporting to MES store yard/ contractor wksp and refixing after execution of maint/repair to their original position or to other location as directed of capacity 40 KVA to 315 KVA.

Labour , tools & plants only for opening the top cover of transformer out/in door type, step down 11 KV/0.415 KV of cap 40 KVA to 315 KVA, lifting of core and winding, draining out transformer oil into container and keep aside for treatment and reuse, carry out strip inspection of core and windings for comprehensive routine, preventive maintenance and any other necessary repairs required to be executed. Refitting the core & windings after carrying out necessary routine maintenance / preventive maintenance or repairs so ordered making all electrical connections, providing sundry items i.e bolts, nuts & washers, reassembling the transformer complete, including testing and commissioning to the entire satisfaction of the Engineer-in-Charge, complete all as specified and as directed.

Cork sheet 6 mm thick gasket packing to transformers top cover of various cap upto 160 KVA outdoor/ indoor.

Filtration, dehydration of transformer oil as drain out from transformer vide Sch 'A' srl item No. 12 here-in-above to make the oil fit for reuse by improving its dieelectric strength not less than 40 KV. Oil below 40 KV dielectric strength shall be replaced with new oil (new oil for toping / or for replacement shall be measured and paid separately under appropriate item of Sch 'A') here-in-after.

Supply, treating (dehydrating), filling new transformer oil in transformers for topping up levels or for replacement of unfit oil. New oil having dielectric strength not less than 60 KV and shall be conforming to IS 335.

Taking out old breathers from transformer, supplying and fixing new breather dully filled with activated agent i.e silica gel for transformer of cap 40 KVA to 250 KVA

Dismantling Core, taking out damaged coils (HV Coils) from its position replacement, including supplying and fixing new winding coils with super enamelled copper winding wires of required gauge, number of turnings & weight to suit with the existing coils with allied insulation materials, packing with spacers etc, complete all as specified and as directed by the Engr-in-Charge

Taking out damaged coils (LT Coils) from its position replacement, including supplying and fixing new winding coils with cotton braided copper wire or strip of appropriate size (thickness & breadth), number of turnings & weight to suit with the existing coils with allied insulation materials, packing with spacers etc, complete all as specified and as directed by the Engr-in-Charge.

Taking out HV procelain bushes from transformers for replacement being damaged, including supply and fixing new HV porcelain, vitreous white, brown or green of voltage grade 11000 V bushes to suit the size of transformers of different makes of capacity 40 KVA upto 315 KVA indoor.

Taking out LV procelain bushes from transformers for replacement being damaged, including supply and fixing new LV porcelain, vitreous white, brown or green of voltage grade 1100 V bushes to suit the size of transformers of different makes of capacity 40KVA upto 315 KVA indoor/out door.

Taking out worn out HV metallic alloy(brass/gun metal) bush rods, incl supply and fixing new HV metallic alloy (gun metal/brass)bush rods of suitable length and dia with necessary nuts, washers and bushing packing to prevent oil leaking from the bushes including making necessary connections for transformer of capacity 50 KV A to 315 KVA

Taking out worn out LV metallic alloy (brass/gun metal) bush rods, including supply & fixing new LV metallic alloy (gun metal/brass) bush rods of suitable length and dia with necessary nuts, washers and bushing packing to prevent oil leaking from the bushes including making necessary connections for transformer of capacity 50 KVA to 315 KVA

Supply, fixing, commissioning & testing of dial type temp gauge 100mm dia dial range 0-100 Cº complete with thermostat built in switch

M & L complete for taking out unserviceable tap changing gear for replacement, including supply & fixing, making connections, testing & commissioning new tap changing gears in transformers of any description / rating and make complete all as specified and as directed.

M & L complete for denting out damaged external cooling tube of transformer & bring them to their original shape, of any type and description of capacity 40 KVA to 315 KVA.

M & L for welding to iron surface sheet steel in cooling tube/ body of transformer of any description to prevent leakages of oil , welding in repairs exceeding 2.5 cm but n.exc 5 cm in length, thickness of metal to be welded n.exc 6mm.

M&L for painting to transformer old painted surface of steel after cleaning, scraping and preparing and filling cavities and providing one coat of synthetic enameled grey paint with spray gun process to transformer of Cap 40 to 315 KVA indoor/outdoor type

10 mm thick Synthetic insulated mat suitable for 11000 Volt grade (ISI Marked) of size 2mx1mx10mm complete all as specified and directed.

S & F HT danger notice plate of size 25x20cm & 1.6mm thick, mild steel sheet, vitreous enamelled white with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamp, bolts and nuts of approved size complete all as specified and directed.

M&L Anti climbing devices spikes type fabricated out of M.S bars (round,square and flat) including nuts,bolts, washers and welding in two halves made to shape to suit the cross section of the pole.

Material and labour for 80 mm dia light grade GI tubing with all fittings for cable protection laid in trenches, fixed on wall/pole with necessary fixing arrangements including dismantling the old pipe.

Material & Labour for stay assembly comprising of stay bow (4000 x 14mm), stay rod 215 cm long and 20 mm dia with nuts, stay plate 300 x 300 x 6 mm thick and 2 nos of thimble complete as shown in electric plate no 1 of SSR part-1 connected to loop type insulator, including dismantling old unserviceable stay assembly complete including loop insulator, wire etc from LT poles NOTE :- Earth work excavation, concrete and loop type insulator shall be measured and paid separetely under relevent items of Sch 'A'.

Supply and fix HT loop type insulators, vitreous, porcelain brown, white or green insulators for working pressure of 1100 volts grade of large size with over all dimensions 90 x 140 mm clearance of hole 25.50 mm including dismantling of existing HT loop type insulator from HT poles of any height place and position.

S&F Galvanised stay wire stranded of size 7/4 mm including necessary binding, strengthening complete all as directed

Material and labour for cement concrete 1:4:8 type D2 using 40mm graded crushed trap stone aggregate for foundation of poles/stays.

Material and labour for PCC (1:2:4) type B-2, using 40 mm graded crushed stone aggregate for making good the road cutting all as directed by Engr in Charge.

M&L for PCC 1:4:8 type D-2 (using 40 mm graded crushed stone aggregate) as in foundation filling and mass concrete, complete all as specified and directed.

M&L for PCC 1:3:6 type C-2 (using 40 mm graded crushed stone aggregate) as in foundation filling and mass concrete, complete all as specified and directed.

M&L for spreading coarse aggregate of 20 mm size upto 10 mm above the ground surface below the HT 2 pole, 4 pole structure including leveling & clearing ground surface by cutting shrubs,vegetation,grass, bushes,weeds & trees upto 30 Cm girth,sweeping & lying the same to distance not exceeding 50 M away from the 2 pole & 4 pole structure, all as specified & directed by Engr-in-Charge. Note :- Cutting & other neccessary material shall be provided by the contractor on his owan arrangement

Supply and fix and draw ACSR Weasel/Squirrelconductor of size 06 strands of aluminium of 2.59/2.11 mm dia and 1 strand of steel of 2.59/2.11 mm dia on LT/HT poles, bringing the sag within limit and fixing on Insulator/Cross arms by means of necessary binding with 16 SWG aluminium binding wire and providing alkathine pipe of approved quality for jumpers, reconnecting the service connections after removing the carbon material including taking down ACSR conductor of any size & type from LT/HT poles at any height position and place complete all as specified and directed by Engr-in-Charge.

Material and labour for switch Air break gang operated Triple pole, mechanically operated mounted on insulator & steel frame with operating mechanisum worked from ground level for current rating upto 400 Amps 11000 Volts all with male & female contacts, post insulator 15 Nos, operating rod, handle etc and renewal of jumpers with heavy duty alkathine pipe cable connections including dismantling of old unserviceable switches vertical/horizontal mounted, including insulator & operating mechanisum for repair/replacement of broken/worn out components and insulators etc complete.

Material and labour for switch Air break gang operated Triple pole, mechanically operated mounted on insulator & steel frame with operating mechanisum worked from ground level for current rating upto 200 Amps 11000 Volts all with male & female contacts, post insulator 15 Nos, operating rod, handle etc and renewal of jumpers with heavy duty alkathine pipe cable connections including dismantling of old unserviceable switches vertical/horizontal mounted, including insulator & operating mechanisum for repair/replacement of broken/worn out components and insulators etc complete.

Material and labour for drop out fuse assembly expulsion type single pole for 11 KV, 200 amps capacity complete consisting of galvanised steel base plate fuse carrying brackets channels with post insulator, fuse carrier fiber glass tube with fuse eliment complete including dismantling the old unserviceable one.

Material and labour for lightning arrester expulsion type high tension complete with all fittings transmission class discharge capacity 65 kilo amps suitable for 11 KV including necessary connections with over head lines & earthing fixed on 2/4 pole structure, including dismantling the old unserviceable one.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m in depth and getting out in any type of soil for errection of HT/LT poles laying of HT/LT UG cables and provn of stay assembly complete

Excavation in trenches, n exc 1.5 m wide and exc 1.5 m but not exc 3 m in depth; for foundation, etc. or not exceeding 10 sqm on plan and exceeding 1.5 m but not exc 3 m in depth for shafts, wells, cesspits, manholes, pier holes, etc and getting out in any type of soil complete

Returning, filling in, including spreading levelling, watering and well ramming in layers not exceeding 25 cm thick in any type soil complete all as specified.

Removing excavated material not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point and entire satisfaction of Engnr-in-Charge complete all as specified and directed

Sand dry clean as cushioning to underground electric cable provided with a layer of 80mm deep before laying and 150mm over cable laid in trenches complete all as speficied.

Supply & Laying reinforced precast concrete cable cover, class EHV, type 1 with peak, size 450mm x 230mm x 50mm thick complete all as specified.

Supply & Laying in trenches or fixed to pole XLPE cable insulated screened, PVC bedded steel strip or wire,armoured, heavy duty electric power cable with aluminium conductor,11000 volts grade, cross-sectional area 95 Sqmm 3 core including taking out old unserviceable XLPE cable of any type and size complete all as specified and directed . (Note : Excavation, returning and removal shall be measured and paid separately).

M&L Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 to 95 sqmm complete all as specified and directed. Make 3M India Ltd / M seal / Denson or equivalent from the makes given in particular specifications.

M&L 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 50 to 95 sqmm.

Material & Labour for cross arms, bracings, supports, clamps and back plate fabricated from structural steel sections including nuts, bolts,washers,welding,bending,drilling of holes for bolts in any shape or size as indicated and applying two coats of aluminium paint over a coat of red oxide primer including dismantling of existing mild steel cross arm with clamps from LT poles of any height, place and position.

Supply and errect Steel tubular swaged poles complete with cast iron base plate, finial taper plug, bolts, nuts and screws as specified type 410 SP-55 (11 metres long) →, including Dismantling of existing HT poles of any discription (tubuler/steel/RCC) by cutting from the bottom dismantling the existing connection, channels, clamps nuts, bolts, etc. Note :- Excavation incl refilling & removing material/Concrete work shall be measured & paid separetely

Supply and fix HT Pin type insulator, porcelain, vitreous, white, brown or green insulator including one galvanised iron mild steel spindle two galvanised iron washers and one galvanised iron nuts, 150 mm height, 150 mm dia for conductor 11000 volts grade including dismantling of existing HT pin type insulator from HT poles of any height, place, and position.

Supply and fix HT shackle type insulators, vitreous, porcelain brown, white or green insulators for working pressure of 1100 volts grade of 90 mm dia, 75mm height including galavnised mild steel strips 31 x 3 mm size and 12 mm dia bolts, nuts, and washers on existing cross arms including dismantling of existing HT shackle type insulator from HT poles of any height place and position.

Material and labour for earthing complete with galvanised steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25M deep below natural ground level ) with top edge of plate not less than 1.5M below normal ground level, surrounded from all sides alternate packed layer of char coal dust and comman salt and electrode connected with galvanised iron earth lead wire 4mm dia by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 3 of SSR part I including necessary earth work in type strata, foundation of pit and wall using PCC 1:3:6 type C1 using 20mm graded crushed stone aggregate 40 mm thick pit cover slab using RCC 1:2:4 type B0 using 12.50 mm graded crushed stone aggregate with 6 mm dia MS bar @ 100 mm C/C both ways GI medium grade 20 mm dia pipe for watering including funnel with wire mesh and 15 mm bore GI light grade pipe for earth lead wire protection up tp 7.5 mtr complete all as directed including testing complete on completion.

All as per srl item No. 58 above but using 32x6 mm GI earth strip as a earth lead & 40 mm dia light grade GI protection pipe complete all as specified & directed Note for item No. 58 & 59 (i) GI wire/strip or protection pipe 15mm/40mm dia upto 7.5 RM included the quoted rate. (ii) The qty above the 7.5 RM shall be measured & paid separetely

M&L for earth continuity conductor or main earthing lead 4 mm dia GI or steel wire fixed to wall on batten or recessed or buried in ground or drawn in conduit/pipe all as required at site.

Supply & fixing for GI strip 32x6mm on wall/batten or recessed or buried in ground all as directed by Engineer-in-Charge.

M&L for Preparing old painted surfaces of steel tubular poles sewaged pole of any description and length not exc 9 above ground level erected in vertical position in HT/LT OH line including cross arms of angle iron/ channel section clamps brackets etc with one coat of aluminium paint 7.5 mtr from top of the pole onward & remaining with black & white paint strip in 30 cm width alternatively upto ground level & numbering the pole with white paint on black paint base 20 cm dia circular/square shape complete all as specified and directed by Engineer-in-Charge.

Restringing of existing HT over head line of ACSR conductor after opening of binding wire from insulator & bringing the sag within limit rebinding the same with insulator with 16 SWG aluminium wire all including renewal of jumpers with providing alkathin pipe of approved quality of jumpers, reconnecting the service connection after removing the carbon material complete all as directed by Engineer in Charge.

Cutting & trimming tree branches along HT/LT over head lines after arranging shut down and by taking all precautions while working on lines, clearing of area, cleaning around sub stations, etc by employing a team of 3 labours for 8 hours per day including all T & P required for the purpose complete all as directed by Engineer-in-Charge. (Note - Trimming of tree branches irrespective in numbers in each span shall be measured as one unit)

Taking down transformer of any size, any capacity and reinstalling after repair of platform( including lifting of transformer from the existing platform and reinstalling of transformer on new platform).

M&L for transformer platforms of size 2.50 m x 2.50m x 1.20m with following specifications as under a) Brick work in sub class B brick old size burnt clay bricks exc 6m mean radius on plan in cement mortar 1:4 complete all as specified and directed b) PCC 1:3:6 as in foundation filling and mass concrete c) Stone boulder filling n.exc 63mm including hand packing and ramming complete d) PCC 1:2 :4 as in flooring / top surface of plate form complete e) Plastering to brick work in CM 1:4 complete f) Angle iron as in post for fencing g) Chain link fencing of any size 4 mm dia GI wire

Supply and fixing, commissioning testing in replacement of secure premier 300 tri vector meter type E3M054, 11KV/ 3 110/ 3 , PT ratio 11 KV/110 V , CT-5A, 50 Hz, Ib 5 A, lmax 10 A, PF-1 to 1 with enclosure and fixing arrangement for fixing on pole like clamps nut bolts, washers , connecting wire from CTs to meter all as specified and directed by Engr-in-Charge

Supply and fixing , commissioning testing in replacement of CT/PT unit dry type CT ratio 30/5A, PT Ratio 11KV/110 V Class 0.5, no of CTs-03, Insulation level-12 KV, freq 50 HZ Including fixing arrangement like channels clamps nut bolts washers leads of cables complete all as specified and directed by engr-in-charge

Note:- Schedule of credit Rs. 1,36,966.50 will be deducted from total amount quoted while accepting the bid. Details of schedule of credit is given in tender documents.

MAMTA ENTERPRISES

ASHOKA ENGINEERS AND BUILDERS