REPAIR/REPLACEMENT AND MAINTENANCE OF HT SUPPLY, TRANSFORMER, VCBS AND CONNECTED ALLIED WORKS AT CDM AREA UNDER AGE E/M NO 1 OF GE (UTILITY) SECUNDERABAD

Amount

Excavating in trenches, n exc 1.5 m wide and n exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in Hard / Dense soil complete all as specified.

All as per item No 1 here in before but depth exceeding 1.5 m & not exceeding 3 m

Returning, filling in, including spreading, leveling, watering and well ramming in layers not exc 25 cm in soft/loose/hard/dense soil complete all as specified.

Removing excavated material (soils) n exc. 50m and depositing where directed at a level n exc. 1.5 m above the starting point complete all as specified.

M & L for sand cushioning to underground cable including punning down of sand in layer complete all as specified. Note :- Thickness of sand cushion after punning down i.e 18 cm shall be measured for payment

M&L for PCC 1:3:6 type C2 (40mm graded aggregates) as in foundation, filling and mass concrete complete all as directed.

M&L for cement concrete 1:3:6 type C-1 using 20mm graded stone aggregates as in coping / pedestal of poles including necessary formwork complete all as directed.

Supply and lay un-reinforced precast concrete cable cover , class , HVP , Type I flat size 300 x 180 x 40 mm laid dry in trenches over under ground cables complete all as directed.

Restreching/Restringing, tightening and repair to overhead line ACSR conductor ( 3 Runs ) of any size on HT poles including necessary Aluminium binding wire connectors PVC sleeves for jumper, fixing of insulators and pruning of tree complete all as specified and directed. Notes: (i) The distance between pole to pole in one span (contains 3 runs of ACSR Conductor) i.e one span will only be considered for payment purpose. (ii) No Extra conductor will be measured for binding to insulators / jumpering etc.

S&F Double Wall Corrugated (DWC) 90mm dia pipe for protection of HT Cable having pressure of 6 kg/mm2 including clamping in walls as required on ground complete all as specified and directed.

Supplying, Erecting and fixing in replacement Steel tubular swaged poles complete with cast iron base plate, finial taper plug, bolts, nuts & screws as specified type 410 SP-55 (11.0 metres long) including taking down old unserviceable pole complete all as specified and directed.

M&L for cleaning/ painting the HT poles of OH lines and HT four pole/ two pole structures complete with crossarms any height and any description thoroughly with necessary cleaning agent including scrapping up of old corroded paint dirt/ rust carefully and applying two coats of synthetic aluminium paint including marking and colour washing of pole coping details as are under:-

Two poles with crossarms

Four poles with crossarms

HT 11 mtr single pole

M&L for XLPE insulated (Earthed) , screened PVC bedded, galvanized steel strip or wire armoured, electric power cables(heavy duty) with aluminium conductor, 11000 volts grade,3 core, cross sectional area 95 sq.mm including inspection and testing. including taking down old unserviceable HT cable complete all as specified .

All as per item No 13 here in before but for size 3 core 120 sqmm

All as per item No 13 here in before but for size 3 core 185 sqmm

M & L for Cable jointing kit for 11 KV (Earthed) grade cable for Straight through heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm complete all as specified.

All as per item No 16 above but for size 120 sqmm to 185 sqmm

M & L for Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm complete all as specified .

All as per item No 18 above but for size 120 sqmm to 185 sqmm

S&F cable route indicator for HT UG cable of 11000 volts bolted with 40x6 mm flat iron member of height 0.60 mtrs and 80 mm CI plate embeded in PCC 1:3:6 type C2 of size 20x20x30 cm block complete all as specified

Inspection of defective 11kv HT cable(laid in UG/trench/tunnel/wall/surface) to locate the fault using cable fault Locator machine(by surge generators mounted on Van) (fault either by Short/Moisture/earth fault or any type) complete all as directed by Engr-in-charge. Note : HT Straight through Joint kit will be paid and measured separately in relevant item of BOQ.

Supply & lay 80mm dia bore GI tubing light grade in protection of cable at road crossing/hard standing/pole protection fixed with clamps as per site requirement etc all as specified including taking down U/S one.

Cutting the existing road straight by manual, depth and width not less than 1 mtr below ground level for passing of underground cable and filling back with excavated soil upto 75% road portion and 25% shall be made with cement concrete 1:2:4 (using 20 mm graded aggregate stone complete all as specified and directed.

Supply and stringing ACSR conductor of any size for LT/HT over head line connections of squirrel/weasel/Mink/Rabbit as per site requirement including taking down old unsv complete all as specified and directed.

M&L for ACSR jumpers in HT/LT over head line upto 10 mm dia as that of existing size including binding wire, nuts & bolts washers complete all as directed by Engineer-in-Charge.

Cutting and trimming tree branches any girth and any size touching overhead lines and cleaning the distance 1.5 mtr length both sides of OH line /nearwith in a span and disposing the same, cleaning the site all as directed by Engr-in-charge

S & F for Cross arms, bracing, supports, clamps and back plate, fabricated from structural steel section including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as directed including two coats of synthetic enamel paint over a coat of red oxide primer & including taking down old unsv, complete all as specified .

Supply and fixing Lightning arrestor expulsion type complete with all fittings transmission class , discharge capacity 65 Kilo amps suitable for 11000 volts and including taking down old unserviceable complete all as specified

M&L for disconnecting the electric supply and servicing of 11 KV AB switches upto 400 Amps by disconnecting, overhauling, greasing and reassembling same in its existing position, testing & commissioning including complete all as directed by Engr-in-charge. Note: Worn out spares shall be measured and paid separately under relevant items

Supply only Female contact or fixed contact heavy duty and high conductive metal assembly brass/Gun metal suitable for 11 KV AB switch including taking down old u/s item complete all as directed by Engr-in-charge

Supply only Male contact or Moving contact blade heavy duty and high conductive metal assembly brass/Gun metal suitable for 11 KV AB switch including taking down old u/s item complete all as directed by Engr-in-charge

Supply only Tinned copper flexible jumper 200A/400A suitable for 11 KV AB switch including taking down old u/s item complete all as directed by Engr-in-charge

Dismantling of insulators any size and any type from existing HT line, removing materials taking to schedule of credit complete all as specified

S&F new pin type porcelain , vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height and 150 mm dia suitable for working pressure 11000 Volts grade complete all as specified. Make :- Rastriya/Jaipuria

S&F disc type insulator, porcelain, vitreous, white brown or green, 145mm high, and 255mm dia ball and socket type single disc assembly for tension with tension clamps for conductors, working pressure 11000 volts grade complete all as specified.

S&F post insulator 11 KV suitable for air break switch/drop out fuse with necessary nuts, bolts washers complete all as specified

Supply, test, install and commissioning of HT 11 KV outdoor type gang operated air break switch triple pole mechanically operated mounted on insulator and steel frame with operating mechanism worked from ground level for current rating upto 400 Amps and connecting up with jumpers including taking down old unserviceable one complete all as specified and directed by Engr-in-charge

M&L for disconnecting and dismantling the existing indoor type, 11 KV, 25kA / 18.3 kA Horizontal Isolation horizontal draw out type VCB trolley of rupturing capacity 350 MVA,630 / 800 Amps from location and including replacement of unserviceable / damaged spare parts and repair / overhauling and carrying out with the following complete all as specified and as directed . Note: Spare parts will be measured and paid separately under relevant item

(i) Inspecting / overhauling of manual / motorised spring drive mechanism by checking mechanism, motor and gear assembly, big gear assembly, stop bolt assembly, main shaft interlocking assembly, closing spring assembly, small cam with screw, motor cut -off limit switch, butter fly switch assembly and apply multi grease lubricant to function smoothly. (ii) Inspecting / overhauling of Shunt trip / Closing coil assembly, earth fault release assembly, auxiliary switch and checking of electrical wiring system.

(iii) Inspecting / overhauling /cleaning and inspecting through insulators, vacuum interrupters by carbon cleaner solution and apply dry graphite conductive sealant (STNVAC) for electrical contacts to avoid carbon deposits on contact surfaces. (iv) Inspecting / cleaning / overhauling of bus bar chamber by checking of bus bars, spout insulators, space heaters and removing dust with vacuum cleaner / Blower and moisture by hot air blower and checking tightness of bus bars, insulators and applying STRIPPEX (A), STRIPPEX (B) insulating coating (STANVAC Make) and HT tape and test with High Voltage (DC) and meggering before and after high voltage test complete.

Supply only spare parts of VCB,11 KV,630 Amps 18.3 kA / 25 kA Horizontal Isolation Horizontal draw out type complete all as specified and as directed for the following :- Make :- Schneider / CG / Siemens

Opening / Closing Push Button Assembly

Motor Charging mechanism gear box assembly

Limit Switch assembly

Closing Coil Assembly

Tripping Coil assembly

Spring Charging Motor

Auxiliary Switch with link

Spring return latch assembly

Vacuum Interrupter assembly

TNC Switch

Ammeter Digital type 96 mm x 96 mm

Voltmeter Digital Type 96 mm x 96 mm

Multifunction meter digital type

Indicating Lamps LED type 24 / 30 / 110 Volt DC or AC

Relay Microprocessed based 3 O/C and 1E/F Type 7SR10 Siemens

Master Trip Relay Type

Testing and calibration of protective relays Earth fault relay and Master trip relay all as specified and directed by Engr-in-charge.

Disconnecting HT/LT electric connections of defective outdoor/indoor distribution transformer step down 11KV / 433 Volts of capacity 50 KVA to 400 KVA, pole mounted/platform mounted, from uploading with help of Crain and transporting at local authorised work shop, taking out complete transformer oil from transformer, stored the oil in separate container. Opening the top cover for lifting up the core assembly carefully dismantling same. Check the condition of HT & LT winding of transformer and providing new insulation such as craft paper insulation top gasket kreeper paper varnish etc, checking the transformer body for any leakages & rectify by welding as required cleaning the transformer body internal & externally painting the body with one coat of approved paint, Refixing of the same after ovening of core to achieve the permissible insulation level and refilling the transformer oil after dehydration & filtration. Reassembling & testing complete and provide testing report, transporting back & up load the same at site by using Crain safely. Reconnecting & commissioning al as specified. Notes :- 1. Winding wires /strips of copper or aluminium shall be measured and paid separately. 2. Spares like Breather assembly, Temp Gauge, LT Bushing, HT Bushing, Top up of new Transformer oil shall be measured and paid separately under respective items. 3. Dehydration and filtration of existing oil shall be measured and paid separately. 4. Transportation of transformer if required (to & from) is deemed to be included. 5. Labour component for fixing of supply only items is deemed to be included in the rate quoted.

Supply only new HV/LV enameled copper winding wire/strips of superior quality of suitable gauge and number of turns of any make, type and capacity including cork sheet, fiber glass insulation / paper insulation / cotton ampire tape, varnishing and wooden blocks, bolts, nuts and washers (Brass) soldering and other packing materials etc., all as specified

Re-conditioning of HT/ LT coil of transformer copper wound made out of super enameled insulated copper strip as per existing gauge and number of turns of any make, type and capacity including insulating, binding varnishing and backing as required complete all as specified

Ovening/ heating of transformer of core rating 100 KVA to 400 KVA of with HV&LV coil / winding at steady temperature for up 72 hrs or above to get permissible insulation value complete all as specified

M&L for Opening top cover of transformer taking out complete oil and keeping in clean and dry container, taking out core & winding from the body, remove the sludge from tank complete and segregation of HT/LT leg coil from transformer including job assembling of jointing the connections of HT/LT coil in core assembling complete insulation works, setting of core, making new connections (as per existing connections), proper alignment of job including keeping in oven chamber of as per IS Specification of respective transformer capacity for remove the moisture as well as fixing of upper yoke lamination, checking, tightening, nuts, bolts, washers and all types of gasket ( Bushing and tank) etc and welding if any leakage found in body or fins, making good deficient item if any, testing the jobs with megger for proper results including two coats of anti corrosive paint after cleaning inside transformer tanks and two coats of outside painting including writing KVA Capacity, repairs of body by means of welding, jointing if required complete for capacity up to 200 KVA with complete Testing and Commissioning all as directed by Engineer-in-Charge.

M&L for Opening top cover of transformer taking out complete oil and keeping in clean and dry container, taking out core & winding from the body, remove the sludge from tank complete and segregation of HT/LT leg coil from transformer including job assembling of jointing the connections of HT/LT coil in core assembling complete insulation works, setting of core, making new connections (as per existing connections), proper alignment of job including keeping in oven chamber of as per IS Specification of respective transformer capacity for remove the moisture as well as fixing of upper yoke lamination, checking, tightening, nuts, bolts, washers and all types of gasket ( Bushing and tank) etc and welding if any leakage found in body or fins, making good deficient item if any, testing the jobs with megger for proper results including two coats of anti corrosive paint after cleaning inside transformer tanks and two coats of outside painting including writing KVA Capacity, repairs of body by means of welding, jointing if required complete for capacity above 200 KVA and upto 400 KVA with complete Testing and Commissioning all as directed by Engineer-in-Charge.

Supply only HT bushing including metal parts and washer complete for any make of transformer mounted on plinth/pole and transformer rating up to 400 KVA capacity complete including taking down old unserviceable one all as directed by Engineer-in-Charge.

Supply only LT rod / studs for any make of transformer rating up to 400kVA mounted on pole/plinth, made of brass with nut and washers, Insulator and fittings etc as per size and shape of original complete including taking down old unserviceable one complete all as directed by Engineer-in-Charge.

Supply only Gasket set (crok sheet) for any make of transformer rating upto 400 KVA for top of transformer or conservator tank after decanning the required level of oil including taking down old unserviceable one complete all as directed by Engr -in-Charge.

Supply and fill new transformer oil for top up, of low viscosity of approved make as per IS 355 of 1992 and di-electric strength 60KV all as specified and directed .

M & L for filtration and dehydration of existing transformer oil by means of centrifugal machine electrically operated at site different locations of transformer in running condition including testing of oil samples both before and after dehydration and filtration. The dielectric strength of the transformer oil shall not be less than 60 KVA with 2 mm gap after dehydration all as specified

M&L for Shifting of any make of transformer rating up to 400 KVA mounted on plinth/pole from existing location to new location and existing transformer vice versa, including removing and reconnections of HT/LT side, jumper / cable connection, control cable connection of both transformers including testing and commission complete all as directed by Engineer-in-Charge. Note:- The rate quoted is deemed to be inclusive of necessary crane / vehicle charges for shifting and installation of the transformer.

M & L earthing complete with galvanised steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground earth pit not less than 2.25 mtr deep below normal ground level) with top edge of plate not less than 1.5m below ground level, connecting to the Galvanised iron earth strip 32 x 6mm dia, by means of nuts, bolts, check nuts and washer etc of galvanised iron and earth lead protected by provision of GI pipe medium grade 40mm bore from earth electrode to test point including provision of concrete pit in PCC (1:2:4) type B-1 using 20mm graded stone aggregates with 40mm thick cover of RCC (1:2:4) reinforced with XPM sheet (weight not less than 4Kg/Sqm) and frame of angle iron 25 x 25 x 6mm with lugs 2 Nos and with 8mm dia MS bar handle made to shape, GI pipe medium grade 20mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge of earth plate, common salt and charcoal filling test point with fixing arrangement, funnel, wire mesh and earth work in hard/dense soil, returning in and removal of surplus soil to a distance not exceeding 50mtr, complete all as specified in electrical plate No 3 of SSR Part I and connection to earth test point including testing on completion all as directed. Note :- The cost of 7.5m long galvanised iron earth strip of 32 x 6mm size and protection pipe of 40mm bore GI light grade is deemed to be included in quoted unit rate.

Cutting unaxious green growth and grass by manual labour or by machine at all 11 KV Electric Installation premises/around 2/4 Pole structure/along the boundary fencing and removing rubbish from the site of work complete all as specified and directed.

M&L for Replacement of air breather with filled silica gel suitable for any make of transformer rating up to 400 KVA mounted on plinth/pole including taking out old unserviceable one complete all as directed by Engineer-in-Charge.

Supply and fixing in repairs temperature gauge circular type of standard size and suitable for indoor/out door type transformer upto 400 KVA capacity complete all as specified .

Supply only tapping switch/gear changer mechanism for varying LT voltage in steps for transformer capacity upto 400 KVA complete all as specified.

Supply and fill Silica Gel in transformer of any capacity/ any make including taking down old silicagel complete all as specified .

Supply only Tinned copper fuse wire of 16 SWG to 22 SWG or 20 Amps to 100 Amps capacity suitable for 11 KV supply

Supply and spread and leveling Graded coarse Aggregate in loose filling over the sand of gauge 40 mm nominal size in the installation yard all as specified.

Supply and lay Synthetic Rubber Insulated Mats of size 12 mm thick, 1m wide, 2 m length for working voltage upto 11 KV, for electrical purpose conforming to IS 15652:2006 (superseding IS 5424) suitable for electrical shock safety complete all as specified complete.

S & F Danger notice plate of 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S. clamps, bolts and nuts of approved size, for HT, 25x20 cm size all as specified .

M&L for double sided Glow sign board of size as directed by Engr-in-Charge showing location/details of power house/ tech area and writing of letters (block, roman, italic) on flex sheets and the sides of perimeter covered with PGI Sheet 24 SWG, properly overlapped or mounted on MS iron 35x35x5 mm 'H' frame with cross brasing including fixing of LED 4 feet 18 W inside of the each board with required point wiring with suitable size of stranded copper conductor, PVC insulated FR cables complete all as specified and directed

M&L sign board of MS plate with suitable thickness of E/M Installation including preparation for painting by rubbing scrapping removing of rust/dirt from surface and painting with two coats of synthetic enamel light blue over a coat of red oxide primer and writing the E/M Installation name etc with white paint of letter not exc 10 cm height in English and sign board mounted on suitable size of MS angle 'H' frame with cross bracing , embedded in PCC bed block with cement concrete 1:3:6 type C1 using 20mm graded stone aggregate complete all as directed and specified by Engr-in-Charge

Excavation in post holes (or similar holes) each n.exc 0.50 cum getting out in hard/dense soil, returning, filling in and ramming earth or broken rubble mixed with earth around, in layers not exceeding 25cm complete all as specified and directed.

M&L for framed works in posts and struts in fencing including cutting tops to shape as directed, drilling holes, notching for wire, etc.; flat iron fillets (for securing wire mesh etc.) including all necessary drilling, bolting or riveting, etc., and similar work conforming to Fe-290 Gde E-165 including dismantling of old fencing complete all as specified and directed.

S&F of 3.15 mm dia chain link MS galvanised fencing wire and average size of mesh 100mm x 100 mm including line wires, to ant type of standards rails, straining bolts, etc including provision of binding with mild steel wire annealed not less than 0.9 mm dia complete all as specified and directed

Arresting of leakage of transformer fins by brazing / welding etc, after removing of oil from inside of transformer and refilling of oil by opening top cover of transformer of capacity upto 400KVA

M&L in replacement of GOD operating GI pipe 25mm dia upto 7.5 mtr long with clamp, nut, bolts, washers and necessary operating handle, complete, all as specified and directed.

Srinivash Engineers

Brite electricals

sree venkateswara enterprises

Srinivasa Consructions

Mavee Syndicate

M Laxmana Rao and Sons

M/s. A&T Enterprises

STANDARD AGENCIES

THE DECAN ENGINEERING AND REFRIGERATION COMPANY

Sri venkateswara Electricals

LEOENTERPRISES

POWER CONSTRUCTION COMPANY