PROVN OF GEYSERS ALONGWITH UPGRADATION OF TRANSFORMER AT JCOS / OR MD ACCN AT SARVATRA NAGAR UNDER GE DEHU ROAD

Supplying, installation, testing and commissioning of 200 KVA capacity (continuous loading) BEE 4 Star rated (Corresponding Level as per BIS amended upto date of receipt of tender) , 11/0.433 KV step down, 3 Phase, 50 Hz, Dyn 11 vector group, ONAN (Oil Natural Air Natural) copper wound transformer (Electrolytic grade 99.9% pure copper, Core made of first grade Cold Rolled Grain Oriented (CRGO) Core grade MOH or better, suitable for out door applications with On Load Tap Changer (OLTC) on HV side having AVR relay and Remote Tap Changer Control (RTCC) for automatic sensing of incoming voltage, automatic operation of OLTC and facility for remote and manual operation of OLTC HV side in range of +5% to -15% in steps of 2.5%, having cable end boxes on HV side suitable for 3x300 sq.mm XLPE cable of 11 KV grade, including bus trunking arrangement on LV side including supplying and laying of copper conductor multicore control cable from transformer to HT breaker/panel for safety tripping, complete with all accessories and safety provisions as per relevant IS Code including first filling of filtered dehydrated oil, i/c supplying and grouting of suitable M.S. Channel with all accessories and transformer shall be confirming to IS : 2026 (Part 1 to Part 5), IS : 1180 and as per SSR specifications complete in all respects etc as required at site. The maximum flux density in any part of the core and yoke at rated voltage and frequency shall be such that the flux density with + 12.5 percent combined voltage and frequency variation from rated voltage and frequency does not exceed 1.9 Tesla. The permissible temperature-rise shall not exceed 35 0C for oil and 40 dg. C up to 200 KVA . Inside of tank shall be painted with varnish or liquid resistant paint. For external surfaces one coat of thermo setting powder paint or one coat of epoxy primer followed by two coats of polyurethane base paint shall be used. IS: 1180 (Part 3) shall be referred to for paint thickness for normal to medium corrosive atmosphere. For highly polluted atmosphere and special application external paint work shall be as per direction of Engineer-in-Charge.

Design ambient condition : a) air temperature 50 0C, b) Relative Humidity 90 % Max, c) Seismic Zone as per location of site, d) Altitude as per location/site. Noise level Shall not exceed limits as per NEMA TR-1 with all accessories running measured as per IEC 551 / NEMA standard. The transformer should have QR code which should contain drawing, test report OEM manual, Geo- Tag of manufacturing location etc. Marking Each transformer shall be provided with rating plate made of anodizedaluminium/ stainless steel material securely fixed on the outer body, easily accessible, as per IS: 1180 Part-3. The entries on the rating plate shall beindelibly marked Fitting and Accessories : The following fittings shall be provided:- a) Two earthing terminals with the earthing symbol b) Oil level gauge indicating oil level at minimum, 30°C and maximum operating temperature; c) Air release device (for non-sealed type transformers) d) Rating and terminal marking plates; e) Silica gel breather f) Drain-cum-sampling valve (¾″ nominal size thread, IS 554) preferably steel with plug for three phase transformers; g) Thermometer pocket with cap; h) Oil filling holes having (1¼″ nominal size thread) with cover (for sealed type transformers without conservator); i) Lifting lugs for the complete transformer as well as for core and winding assembly; j) Pressure relief device or explosion vent above 200 kVA; k) One filter valve on the upper side of the tank (for transformers above 200 kVA); l) Unidirectional flat rollers (for transformers above 200 kVA); m) Inspection hole (for transformers above 200 kVA); n) HV side neutral grounding strip (where one of the HV bushing terminal is connected to earth); o) Buchholz relay for transformers above 800 kVA. p) Arcing horns or suitable rating lightning arrestors for HT side – 3 Nos. q) Bird guard; r) Oil temperature indicator and winding temperature indicators for transformers above 200 kVA with suitable tripping mechanism above permissible limit s; t) Additional Neutral separately brought out on bushing for earthing. v) Non return valve (for conducting pressure test); w) Pressure relief device or explosion vent x). Monogram Plate y) Inspection cover z). Detachable type radiators with top and bottom shutoff valve. aa) Oil Conservator with Oil level indicator, minimum level marking and drain plug for all transformers of capacity 50 KVA and above. bb) Necessary hardware, clamps, lugs etc. for termination on HV/MV etc. for all transformers.

Supply & Erect Steel sewaged tubular poles complete with cast iron base plate, final taper plug, bolts, nuts and screws as specified of type 410 SP-55 (11.0 Mtrs Long) including Painting with two coats of aluminium paint over a coat of red oxide primer complete after preparation of steel surfaces and writing letters / Numbers not more than 10 cm high by Black paint all as directed.. .

Supply and fix cross arms, bracing, support, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts in any shapes or size including one primer coat, one under coat and one finishing coat all as directed.

Supply and fix lightning arrestor HT 11 KV 10 KA station class

Supply and fixing Polymeric composite Disc Insulator,as per IEC 61109,Material of FRP Rod-Boron free ECR,Material of sheds -Silicon Rubber,Type of metal end fittings-Tongue & Clevis,Material of sealing compound-RTV SiliconCreepage distance ( min ) -320 mm ,Length of FRP Rod ( min )-200 mm,Dry arc distance -170 mm suitable for 11 KV all as specified .

Supply and fix earth strip of size 32 x 6 mm galvanised iron strip fixed to wall/over head reservoir on batten or recess or chases or buried inground or drawn in conduit /pipe fixed on poles insulated as per Engr-in-Charge.

M & L for danger notice board,Supply and Fixing, Danger notice plate of 1.6mm thick mild steel sheet, vitreous enamelled 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, forHT, 25x20cm size

M & L for Aluminium conductor, steel reinforced(ferret)

M & L taking down unserviceable GOD,and supply and fixing Triple pole, mechanically operated mounted on insulator and steel frame, with operating mechanisum worked from ground level GOD 11 KV heavy duty, for current rating 400 with drop out fuse assembly complete all as directed.Make:Pactil,Jaipuria,HEI