PROVN OF 250 KVA TRANSFORMER FOR UPGRADATION OF ELECTRIC SYSTEM AND ALLIED WORKS AT PDDE COMPLEX

Amount

Supply, installation, testing and commissioning transformer step down outdoor type copper wound , oil cooled IP-43 plinth mounted powder coated capacity 250 KVA CL- I with latest feature complete with standard fitted HT 11 KV 3 Phase LT 433 V 3 phase 4 wire, 50 C/S oil immersed naturally cooled externally cooling tube delta connection on primary HT 11 KV side and star connection on secondary LT 433 V with tapping at +/- 2.5% to +/- 5% & +/- 7.5% on HV side and to be charged by means of hand operated off load/lap changing gear including first filling of new transformer oil of dielectric strength not less than 60 KV with all fiiting and accessories such as LT box at LT side,silica gel,brather, oil level indicator, conservator tank with oil level indicator,drain out valve (oil tank), exhaust vent,air release valve, temp gauge and cast iron wheel etc complete level- 2 as per IS-1180(Part-1):2014, complete all as specified and directed.

Construction of Plateform for installation of transformer with and including Earth work, Brick work, PCC, RCC, Plastering, chain link fencing, gate etc all as shown in Drawing No CWE/TD-230/2021 Sheet 1/1 dated 23 Jun 2021, complete all as specified and directed.

Supply and erection of 2 pole structure on 11 meter PCC pole with and including anti-climbing device as enumarated in SSR Part-I , necessary earth work (ie Excavation, returning filling, removing etc), PCC 1:4:8 using 40mm graded stone aggregate as in foundation and PCC 1:2:4 type B-I using 20 mm graded stone aggregate as in coping of poles & cross arms etc, complete all as specified and directed.

Switch air break gang operated triple pole mechanically operated from ground level, mounted on insulators and steel frame (12 insulator type) outdoor type suitable for vertical installation single break provided with locking arrangement consisting of MS channel, HT post top insulator with drop out fuses operating rod 25mm bore GI pipe medium grade confirming to relevant IS, current rating 200 Amp and voltage 11 KV including jumpering, lead of wire/cable as directed at site including taking down old/ unserviceable switch, complete all as specified and as directed.

XLPE insulated, screened, PVC bedded,galvanised steel strip or wire armoured, electric power cables (heavyduty) withaluminium conductor, 11000 volts, grade cross sectional area 95 sq. mm 3core complete all as specified and directed.

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 and directed.

Cable jointing kit for 11 KV (Earthed) grade cable for indoor 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 and directed.

Stay assembly with all accessories and GI stay rod 16 mm dia 1900 mm long, stay wire 7/4 mm stranded galvanised including mild steel stay plate 300 mm x 300 mm x 6 mm and galvanised thimble, galvanised steel 14 mm dia 400 mm long stay bow and GI nuts, washers including loop type insulator vitreous porcelain white, brown or green big size withoverall dimensions 90 mm x 140 mm clearance of hole 25.5 mm complete all as specified and shown in electrical plate No 01 of SSR Part - I with including taking down old unserviceable stay assembly (Excavation, stay clamps and concrete work etc will be measured and paid separately), complete all as specified and directed.

ACSR conductor any size/any type drawn on fixed to insulator on the pole complete as with permissible sags for OH Conductor, complete all as specified and directed.

Galvanised steel wire 4.0 mm dia for continuous earth wire and Cradles hexagonal/rectangular shall be provided and securely fastened to each pole and connected with earth ordinarily and cradle guarding where reqd complete incl dismentaling existing GI wire, complete all as specified and directed.

Cross arms bracing support clamps, back plate etc fabricated from structural steel section with bolts, nuts, washers,welding, bending cold or hot,drilling holes for bolts in any shape and size as directed or indicated and painted with one coat of red oxide primer and two coats of Silver paints, complete all as sepecified dirceted by engr-in-charge.

Insulator Pin type, polymer composit material including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia for 11000 volts grade, complete all as sepecified dirceted by engr-in-charge.

Disc type insulator(Single disc assembly) , porcelain, vitreous white / brown of size of 145 mm height, 255 mm dia ball and socket type for 11000 volts grade insulator, complete all as sepecified dirceted by engr-in-charge.

Danger notice plate of 1.6mm thick MS sheet vitreous enamelled white with letters, figures and conventional skull and bones in signal Red colour and inclusive fixed with MS flat clamps 25x3mm 2 Nos, nuts, bolts for HT 11000 Volt of size 25x20cm, complete all as specified and as directed by Engr-In-Charge

Pin type insulator , porcelain, vitreous white / brown including one galvanized mild steel spindle, two galvanized iron washers and one nut (galvanized iron) , for size of 150 mm height, 150 mm dia for 11000 volts grade insulator all as specified and as directed.

Excavation in trenches not exc. 1.5 m wide and not exc. 1.5 m depth for foundation laying of cable etc or for shaft wells cesspits manholes per holes etc 10sqmm on plan and n.exe 1.5m in depth and getting out in any type of soil, complete all as sepecified & dirceted by EIC.

Returning filling in, including spreading, leveling, watering and well ramming in layers not exc 25m thick all as specified and directed.

Removing excavated material from site to a distance not exc 50 metre away and depositing where directed not exc 1.5mtr from the starting point all as directed.

GI Pipe light grade 80 mm bore incl all accessories for cables protection/Mechanical protection, laid under plinth/floors/path culverts with complete accessories such as bends/sockets/reducers/saddles incl necessary threading/drilling works, complete all as specified and directed

GI Pipe light grade 50 mm bore incl all accessories for cables protection/Mechanical protection, laid under plinth/floors/path culverts with complete accessories such as bends/sockets/reducers/saddles incl necessary threading/drilling works, complete all as specified and directed

GI Pipe light grade 40 mm bore incl all accessories for cables protection/Mechanical protection, laid under plinth/floors/path culverts with complete accessories such as bends/sockets/reducers/saddles incl necessary threading/drilling works, complete all as specified and directed

Supply and laying well burnt old size sub class 'B' bricks laid flat with width equal to length of brick perpendicular to the direction of cable, adjacent/abutting each other complete all as specified and as sirected by Engineer-in-charge in trenches over the cable for protection.

Sand cushioning to underground cables provided with a layer of sand 8cm thick before laying the cable in trenches and 15cm thick after laying the cable in trenches complete all as specified. Note:- 1. Dry fine sand of best available quality shall be used. 2. Punned thickness shall be made and paid.

PCC 1:2:4 type B1, using 20 mm graded stone aggregate as in copping of electric pole at site including providing necessary form work complete all as specified and as directed by the Engineer in charge

XLPE cable insulated screened PVC bedded galvanised steel strip or wire armoured electric power cable (heavy duty) 11 KV grade with stranded aluminium coductor of size 300 Sqmm 3.5 core and including suitable size of lugs all as directed by Engr-in-Charge.

XLPE cable insulated screened PVC bedded galvanised steel strip or wire armoured electric power cable (heavy duty) 11 KV grade with stranded aluminium coductor of size 120 Sqmm 3.5 core and including suitable size of lugs all as directed by Engr-in-Charge.

XLPE cable insulated screened PVC bedded galvanised steel strip or wire armoured electric power cable (heavy duty) 11 KV grade with stranded aluminium coductor of size 95 Sqmm 3.5 core and including suitable size of lugs all as directed by Engr-in-Charge.

Aluminium lugs/thimble of size 300 sqmm, complete all as specified and directed

Aluminium lugs/thimble of size 240 sqmm, complete all as specified and directed

Aluminium lugs/thimble of size 120 sqmm, complete all as specified and directed

Aluminium lugs/thimble of size 70/95 sqmm, complete all as specified and directed

Supply, installation, testing and commissioning LT panel powder coated vermin and weather proof of suitable size for 3 Phase 415 volt , outdoor double door type made out 3.15 mm thick CRCA sheet with angle iron frame of size 75x75 x6 mm cubical type front and back door operated complete with aluminium bus bar 500 Amp 4 way fitted on DMC insulation with color coding and internal panel with suitable size copper cable FRLS powder coated , with IP 54 as per IS 13947 protection, fault rating 50 KA/1Sec, complete and including with following items:-

MCCB 4 Pole, current rating 320 Amp, with adjustable thermal magnetic setting 70%-100% breaking capacity 50KA at 415V,50Hz, - 01 No as incomer

MCCB 4 Pole, current rating 320 Amp, with adjustable thermal magnetic setting 70%-100% breaking capacity 36KA at 415V,50Hz, - 02 No as outgoing and 01 No as spare.

Onload changeover switch AC-23 (side handle) in sheet metal enclosure of capacity 320 Amp, 415 volts 3 phase , four pole - 01 No

Indicator lamps (LED type) showing R,Y,B phases - 01 Set

Internal panel wiring with suitable multistranded copper conductor PVC insulted and seathed FRLS complete with copper thimble/lugs

Angle iron base frame as reqd size as per above panel, total leg height 600 mm and grouting in side PCC 150 mm legs and made out of 75 x 75 x 6 mm thick angle iron duly painted - 01 No.

Necessary foundation in PCC 1:3:6 (40 mm graded aggregate) Type C2 for foundation of angle iron legs frame work complete - 01 Job

Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp suitable for 11000 volts, complete all as specified and directed

Earthing complete with galvanized steel earth plate electrode 600x600x6mm thick buried directly in ground earth pit not less than 2.25mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below ground level connected to galvanized iron wire 4 mm dia by mean of nut/bolt and washer of galvanized iron or steel as shown in electrical plate No 5 including 20 mm bore GI tubing for protection of earth wire upto test point of SSR part I including necessary excavation and earth work GI pipe 20mm bore light grade for watering and GI 15mm bore light grade pipe for protection of GI earth wire etc, PCC chamber with RCC cover in cement concrete 1:2:4 Type B1(20mm graded stone aggregate), funnel, wire mesh, charcoal dust, salt layers each layer thickness should be 15 cm (layer start from below the electrode plate to above plate) etc, connected to LT panel board as indicated including testing, complete all as specified and as directed.

Earthing complete with galvanized steel earth plate electrode 600x600x6mm thick buried directly in ground earth pit not less than 2.25mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below ground level connected to galvanized iron strip 25 x 4 mm size by mean of nut/bolt and washer of galvanized iron or steel as shown in electrical plate No 5 including 40 mm bore GI tubing for protection of earth strip upto test point of SSR part I including necessary excavation and earth work GI pipe 20mm bore light grade for watering and GI 15mm bore light grade pipe for protection of GI earth wire etc, PCC chamber with RCC cover in cement concrete 1:2:4 Type B1(20mm graded stone aggregate), funnel, wire mesh, charcoal dust, salt layers each layer thickness should be 15 cm (layer start from below the electrode plate to above plate) etc, connected to LT panel board as indicated including testing complete all as specified and as directed.