REPAIRS/MAINT OF HT SYSTEM AND CONNECTED ACCESSORIES AT VARIOUS SUBSTATION IN MPH AREA UNDER GE (UTILITIES) UDHAMPUR

Amount

Drawing out the SF 6 / RMU from the Circuit system of 11 KV , Servicing the Circuit breaker by checking the following parameters for proper functioning using CTC for clear off the carbon deposited . a) Checking / fault diagnisis of Isolator & earth switch mechanism slips b) Checking of Gas inside the tank c) Checking the functionality of relay protection system d) Checking the Mechanism of isolator module and vcb module e) Checking the voltage presence indicator f) Checking the comlete control wiring for tripping/ closing / indication system

Taking down the VCBs of capacities (630-800 ampers) from the VCB Panel Calibration , Maintenance and complete overhauling of 11 KV,3 phase, VCB including disassembling of operating mechanism parts, well cleaning with petrol & CRC-226 including reassembling, panel board, main bus bar, de-carbonizing all joints bus bar, CTs, PTs, spouts metal parts and making VCB perfect operating in manual and electric mode including all routine and preventive maintenance complete and replacing unserviceable parts and components complete, all as specified and directed by Engr-in-Charge. make of VCB:- Crompton Note:- Spare parts will be measured and paid seperately as supply only under respective items. The labour charges deemed to be included in the unit rate quoted for this item.

Supply only Spare parts of VCBs ( Make : As Suitability for VCB Crompton Greaves , siemens , ABB Schneiders)

a) Current transformer of capacities 400/200/5/5A

b) Current transformer of capacities 200/100/5/5A

c) Circuit Spouts

d) Bus Spouts

e) Vacum Interrupters

f) Tripping / Closing Coils

g) ASHIDA ADR241S NANO Relay

M&L for painting to steel tubular swaged pole of Overhead lines (11 Mtr long) complete with and including comprising the following works :- (a) Scraping out wornout old paint and making the surface smooth. (b) Painting the pole and all MS work mounted on pole with two coats of synthetic enameled paint (Aluminium shade) as directed by Engr-in-charge. (c ) Forming five nos coloured bands at lower portion of pole each 300 mm wide alternatively with white and black colour (or any colour as approved by Engr-in-charge) synthetic enameled paint and marking pole no. with black and white paint complete all as specified.

M&L for ACSR conductor of required size for Over head lines on poles including streching, tightining of poles insulator with winding wire of suitable size with insulator/streching of ACSR conductor all as specified and directed by Engr-in-Charge.

Supply, installation and testing HT gang operated air break switch 11 KV, 3 pole vertically mounted type, mechanically operated, mounted on steel frame with operating mechanism, worked from ground level for current upto 200 Amps with drop out fuse elements of required capacity, GOD/switch having 100 MVA rating at 11 KV and 12 insulators suitable for 11 KV, 50 C/s including mounting on HT poles and necessary electrical connections complete all as specified and directed by Engr-in-Charge.

Supply, installation and testing HT gang operated air break switch 11 KV, 3 pole vertically mounted type, mechanically operated, mounted on steel frame with operating mechanism, worked from ground level for current upto 400 Amps with drop out fuse elements of required capacity, GOD/switch having 100 MVA rating at 11 KV and 12 insulators suitable for 11 KV, 50 C/s including mounting on HT poles and necessary electrical connections complete all as specified and directed by Engr-in-Charge.

Supply, installation and testing Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp,11000 Volts complete all as specified and directed by Engr-in-Charge.

M&L for cross arms of any sizes with drilled hole (hot and cold etc) in position M.S. work including MS nut and bolts, washers and two coats of aluminium paint over one coat of redoxide primer, all as specified and directed by Engr-in-Charge.

M&L for stay assembly for steel tubular poles comprising of 7/10 SWG galvanized MS stranded stay wire of required length, minimum tensile strength 70 Kg/mm (grade-2 quality) fixed to pole with and including FI clamps bolts, nuts, washers, galvanized steel stay rod 20 mm dia 180 cm long bow 400x14mm nuts/bolts, washers all galvanized and two nos thimble, loop insulator of size 90x140mm vitreous, clearance dia of hole 16mm, stayplate of size 230x230x6mm including necessary excavation and earth work PCC 1:3:6 type C-2 using 40mm graded crushed stone aggregate in foundation and disposal of surplus spoil, upto 50 M all as specified and shown in plate No 1 of MES SSR Pt -I, complete all as specified and directed by Engr-in-Charge.

Dehydration and filteration of existing serviceable transformer oil at site or at factory permisses of any type,any capacity,any rating transformers till it achieves the required dielectric strength upto 50 KV at 2.5mm gap using dehydration plant complete, all as specified and directed by Engr-in-Charge. Note: Mobile filtration machine has to be brought at site for dehydration alongwith hose pipe/ cable, necessary T&P shall be provided by contractor.

Topping up of transformer oil of good quality having not less than 50 KV dielectric strength,flash point not less than 135 degree C, having low viscosity for filing complete, all as specified and directed by Engr-in-Charge. Make: Savita/Power oil/Servo oil as per IS 335 of 1983 all as specified. Note: Draining out old unserviceable oil & filling process is deemed to be included in quoted rate in respsctive item.

Taking proper shut down in writing and disconnecting the LT and HT electric mains from transformer of capacity 63 KVA to 500 KVA, removing the lid/cover for inspection to facilitate minor repairs at site , replacement of HV/LV bushings of aluminium of required current rating , draining out the transformer oil reassembling the transformer, refilling the transformer oil (new or old) installing, commissioning and testing at site complete, all as specified and directed by Engr-in-Charge.

Shifting of transformer of capaicites (63KVA-500KVA) from the Premises of ( MPH Premises) to workshop for necessary repairs. Reshifting the transformer Post repairs from workshop to MPH (Premises) with help of hydra/crane/any other lifting devices . Note: Transformer rewinding shall be done at authorized workshop by Sstate Electrical Board or OEM.

M&L for rewinding of HT/LT coil conforming to the original winding of the transformer of any make/capacity with super enamelled cooper wire/strip or DPC copper wire of appropriate gauge and turns including allied materials complete, all as specified and directed by Engr-in-Charge.

Taking down the old corroded / damaged HT Poles from the substation. Supply and fix steel tubular pole complete with cast iron base plate, finial taper plug, bolts , nuts & screws as specified type 410 SP-55 all as specified & directed Note : a) Necessary exacavation , foundation and coping shall be measured and paid separately

Dismantling and taking down existing HT insulators of any type and size as directed by Engineer -in-charge.

Single Disc Type insulator, Porcelain, vitreous white, brown or green HT 11000 Volts size145 mm high and 255 mm dia ball and socket type, with tension clamp in replacement, complete all as specified and directed by Engr-in-Charge.

Pin Type, Porcelain vitreous, White, brown insulator of size 150 mm height, 150 mm dia for 11000 volts grade including one galvanised mild steel spindle , two galvanised iron washers and one galvanised iron nut in replacement, complete all as specified and directed by Engr-in-Charge.

Supply & Fix HT porecelain bushing complete with brass/tinned copper rod with nuts and gasket set complete for following cap transformer :-

(a) 63 KVA to 125 KVA capacity

(b) 150 KVA to 250 KVA capacity

(c) 315 KVA to 500 KVA capacity

Supply only LT porecelain bushing complete with brass/tinned copper rod with nuts and gasket set complete for following cap transformer :-

(a) 63 KVA to 125 KVA capacity

(b) 160 KVA to 250 KVA capacity

(c) 315 KVA to 500 KVA capacity

S&Fsilica gel in replacement (for transformer of any type/cap) complete with end fitting as directed by Engineer -in-Charge

M&L for Painting of transformer of following capacity with two coats of synthetic enamel paint of grey colour by spray complete including preparation of old surfaces, removing, cleaning of oil, grease etc. all as specified and directed by Engineer in Charge

(a) 63 KVA to 150 KVA capacity

(b) 150 KVA to 250 KVA capacity

(c) 315 KVA to 500 KVA capacity

M&L for Surface Dressing/Cleaning of various 11 KV sub-stations free from vegetation of any type including trimming of tree branches, bushes, creepers, etc. complete all as specified & directed.

Supply and spread stone aggregate of size 20 mm in sub-stations/electric yards including levelling complete, all as specified and directed by Engr-in-Charge.

M&L for trimming of tree branches upto 75 mm dia to clear the route of HT/LT over head conductors in switch yards and open joints upto 3m from the conductor including removing the cut branches from site and depositing at places n exc 50m all as directed by Engineer-in-Charge. (Note :- 1. One/more tree branches covering 3m shall be considered as one unit.)

M&L for boring of existing road/path for laying of GI pipe protection for UG cable including making good distrurbed area/surface complete, all as specified and directed by Engr-in-Charge.

M&L for painting two coat of aluminium paint on steel structural members of HT 2 pole structure over one coat of red oxide with brush/spray at site including scrapping/ removing paint from old surfaces and preparation of surface complete, all as specified and directed by Engr-in-Charge.

Supply & fixing or laying galvanised steel tubing light grade 100 mm bore (ISI marked) for protection of under ground cable on poles / walls under road crossing etc including dismantling & taking down existing pipe complete, all as specified and directed by Engr-in-Charge.

Plain cement concrete 1:3:6 type C-2 (using 40mm graded stone aggregate) as in foundations filling and mass concrete complete, all as specified and directed by Engr-in-Charge.

Plain cement concrete 1:2:4 type B-1(using 20 mm graded stone aggregate) for coping of poles complete including necessary form work, all as specified and directed by Engr-in-Charge.

M&L for 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 directed by Engr-in-Charge.

Description all as per Srl item No 32 above but size of cable 120 to 185 Sqmm .

M&L for Cable jointing kit for 11 KV (Earthed) grade cable for heat shrinkable straight through 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 directed by Engr-in-Charge.

Description all as per Srl item No 34 above but size of cable 120 to 185 sqmm.

Taking down the unserviceable / moistured HT Cable from the under ground system. Supply , lay test and commissiong of HT Cable XLPE insulated , screened, PVC bedded galvanised steel strip or wire armoured electric power cable ( heavy duty) with aluminium conductor , 11000 volts earthed grade cross sectional area as illustrated below:-

a) 95sq.mm,

b) 120sq.mm,

c) 150sq.mm,

Excavating in trenches, n exc 1.5 m wide and n.exc 1.5 m in depth; for laying cables/pipes, etc. n exc 10 sq m on plan and n exc 1.5 m in depth in any type of soil and getting out soil, complete all as specified and as directed by Engr-in-Charge.

Description all as above but depth exceeding 1.5 mtr but not exceeding 3.0 mtr complete all as specified & directed by Engineer-in-charge.

Returning, filling in (soil) including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick in any type of soil,complete all as specified and as directed by Engr-in-Charge.

Removing excavated material n exc. 50m and depositing where directed at a level n exc. 1.5 m above the starting point, complete all as specified and as directed by Engr-in-Charge.

Supply and lay DWC Pipe ( Double wall corruguated) confirming to IS: 14930(Part-II) along with necessary Snap fit Coupler for interconnection Suitable for HT Cable of size 150/95 sq.mm (90X 76 mm as diameter) all as specified & directed by Engineer in charge.

Taking down the unserviceable rubber mats from the substation . Supply and laying synthetic rubber insulated mats 2.5 mm thick for voltage up to 11kv electrical purpose as per IS 15652-2006 suitable for electric shock safety of sizes 2 x1 m, complete all as specified and as directed by Engineer in charge.

M&L for earthing with galvanised steel earth plate electrode 60 cm x 60 cm x 6 mm thick, with earth strip 32 mm x 6 mm protected by galvanised iron or steel pipe 40 mm bore light grade with Watering pipe 20 mm bore GI medium grade. The rate of earthing shall be inclusive of necessary earth work in any type of soil, charcoal, salt, funnel, PCC pit and RCC cover with handle complete as per electrical plate No. 3 of MES SSR Part-I.

Earthing complete with galvanized steel earth plate electrode 60 cm x 60 cm x 6.3mm thick buried directly in ground, (Earth pit not less than 2.25 mtr deep below ground level) with top edge of plate not less than 1.5 mtr below normal ground level, connected to and including 4mm dia galvanized iron wire lead by means of bolts, nuts, check nuts and washers of galvanized standard iron or steel all as specified or indicated in electrical plate No 3 of MES Part-I, including testing on completion including the material and labour and taking out old unserviceable earthing of the following :- (a) Excavation and earth work for drilling hole for electrode in any type of soil. (b) PCC pit in cement concrete 1:2:4 type B-1. (c) Precast RCC cover with suitable handle 40 mm thick in PCC 1:2:4 type B-1, reinforced with welded steel wire fabric weighing not less than 1.87 Kg/Sqm. (d) Funnel with watering pipe of GI 20 mm nominal bore medium grade and copper lugs etc all as specified.

Srl item No 44 Contd … (e) 15 mm nominal bore light grade GI protection pipe 7.5 mtr long for protection of earthing lead from mechanical injury or tempering. (f) Requisite quantity of common salt and charcoal. (g) Testing of earthing. Note : On testing after completion of earthing, if the desired earth resistance is not obtained, the earthing will be re-done by the contractor at his own risk and cost to the entire satisfaction of the Engineer-in-Charge.

M&L for replacement of earthing with Copper earth plate electrode 600 x 600 x 3.15 mm buried directly in ground (earth pit not less than 2.25 M deep below ground level) with top edge of the earth plate not less than 1.5 M below ground level connected to Copper strip 20 x 3mm thick for earthing lead fixed by means of nuts,bolt,washers etc connected to earth test point complete all as specified in electrical plate No 3 of SSR-2009 part 1, including necessary excavation and earth work in any type of soil, comman salt, charcoal dust, 40 mm dia light grade GI pipe for protection to earth lead, GI water pipe 20mm dia with funnel &wire mesh, PCC pit with CI cover and frame etc complete all as specified and directed by Engr-in-Charge. Note: - (i) All the joints shall be made with welding to get proper conductivity. (ii) On testing after completion of earthing, if desired earth resistance is not obtained, the earthing will be re-done by the contractor at his own risk & cost to the entire satisfaction of Engineer-in-charge. (iii) Copper Strip 32mmx6mm upto 7.5 mtrs with 40 mm protection pipe shall be included in quoted rates.

vijay kumar gupta and co

ARNABH ASSOCIATES

proach associates

FANGALIA TRADERS

slathia construction works