Transformer Installation and Erection Work

Amount

Details of Work:-

Shifting of new 160 MVA. T/F with accessories from unloading point to plinth with the help of rail, pully device, sleeper ete (material of related work & men Provided by contractor ) up to distance of approx. up to 20 Mtrs.Including turning if required .

Additional shifting 50 Meters @ 5 Mtrs/ Job.

Shifting of all accessories and oil drums from unloading place to site.

Filling the T/F oil in 20 KL oil tank and its centifusing upto required BDV value.

Complete erection of new 160 MVA T/F at 220/132 KV S/S ext. at 400 KV S/S Orai by erection of radiators, headers , conservator tank , HV/LV/IV Bushing , all pipe lines , Bucholz relay, OSR, PRV, erection of marshalling box, driving mechanism , cooling fans , oil pumps and all other links etc. complete in all respect radiators, oil pipe lines , conservator tank and attending the oil leakage in any other putting the transformer in vacuum for 24 Hrs. and all other associated work to complete the job satisfactorily as per instruction manual or direction of the Engineer.

Supply & Filling of dry Nitrogen gas / dry air having Dew point 70°C fo 75°C under vacuum from top value of the transformer up to pressure of 5 PSI and maintaining the same in the main tank for 12 Hrs. Including cost of Nitrogen gas/dry air and filling device for dry cycle.

Create the vacuum inside the T/F tank upto standard value as per technical specification and maintain for 24 Hrs. Filling the oil step by step in 160 MVA T/F.

Centrifusing of complete transformer oil in T/F main tank by connecting centrifusing machine to be provided by the contractor and taking the BDV and IR Values of the oil periodically till the required value in as per direction of Supervising Engineer. (Centrifusing machine & operator shall be arranged by the contractor).

New Earthing of 160 MVA T/F body,terminal box and two points using 75x10 mm M.S. flat (MS Flat to be provided by the department free of cost). Painting of MS flat by one coat of anti-corrosive red oxide (primer)and two coats of green paint after proper cleaning by sand paper.

Connection of 160 MVA T/F with laying of cable and termination in between turrets WTI OTI Bucholz relay PRV Cooling fans pumps OLTC marshalling box etc. with proper ferrulling as per drawing.

Delta earthing for 160 MVA T/F consisting of delta set with 03 Nos. 40 mm / 36 mm dia size 3 meters long electrodes and its placing inside the ground and connecting all the 03 electrodes with 75x10 mm M.S. Flat 700 mm deep and connecting the same with earth mat at two places (MS Flat and MS Rod provided by the department free of cost).

Oil testing (BDV,PPM,DGA) after centrifuging of T/F oil of 160 MVA T/F at 220/132 KV S/S ext. at 400 KV S/S Orai from CPRI, Noida/Banglore. ( by contractor at his own cost and submmiting duly signed authentic testing reports)

Laying, Dressing and binding of cable including fixing of cable tray support structure and termination of cable marking the top and its ferruling as per schedule and inter connection cable as per requirement of RTCC panel, marshalling box, driving mechanism etc.

Pre erection and pre commissioning testing and after installation of 160 MVA T/F's Turret CTs likes Ratio, Knee point voltage measurement continuity between terminals, Polarity, secondry winding resistance, IR (using 500 V megger), magnetizing curve etc. Bushings Tan Delta & capacitance @ 2,5,10 KV level, Bushing Tan Delta and capacitance at variable frequency from 17 HZ to 400 HZ at 2.5-3.5 KV, IR (using 5 KV megger) core insulation, magnetizing current, magnetic balance test, Tan delta capacitance of bushing & windings, FRA, WRM, CRM, SFRA test etc. at 220/132 KV S/S ext. at 400 KV S/S Orai

Following work are to be carried out at 220/132 KV S/S ext. at 400 KV S/S Orai along with modification of mulsifire pipe line with supply and installation of high velocity automatic spray system for 160 MVA T/F (Bharat bijlee Make) as per technical specification and drawings including laying of fire detection water/air pipeline,valve, quartz bulbs, nozzles all materials complete as per details :

Supply and Laying of GI pipe (JINDAL/APPOLO/TATA MAKE) complete with elbow tee, socket flanges and bends of size( fresh coat of paint as per requirement of the department)

100 mm dia

80 mm dia

50 mm dia

25 mm dia

Supply,Installation,Testing and commissioning of pneumatic deluge valve,150 mm dia (HD FIRE/MATHES PLATT) as per IS along with all men @ materials

Supply,Installation,Testing and commissioning of H.V nozzle having dischrge 80 literss/minute cone angle 60° to 102° as per IS along with all men @ materials (HD FRE/TYCO MAKE)

Supply,Installation,Testing and commissioning of Q.B detectors, rating 3.5 to 7.0 kg Cm2 with red/Yellow liquid filled in side.(HD FRE/TYCO MAKE)

Supply and Installation of 80 mm dia G.I pipe for supports with round clamp at the top and flange at bottom as per erequirement.(JINDAL/TATA MAKE)

Supply and laying of underground M.S pipe line (JINDAL/APPOLO/TATA MAKE) with elbow tee, socket flanges etc with all men materials and anti corrosive treatment and conncting/jointing the pipe line with existing pipe line including cutting the roads( if required),trench for laying of pipe line then constrction of same road ,trench and required pedestals complete in all respect.

150 mm dia

Supply ,Installation , Testing and commisioning of following ISI mark accessories with all men & materials

150 mm "Y" type strainer (ZOLOTO/KARTAR/SIR/ARGO MAKE)

Pressure switch bellow type (INDFOS/DANFOSS MAKE)

Pressure gauge 150 mm dia (INDFOS/DANFOSS MAKE)

Providing & fixing of gate valve made of brass of size 150 mm dia (ZOLOTO/KARTAR/SIR/ARGO MAKE)

Casting of Support pipe foundation size (900x400x400 mm) in 1:2:3 cement , concrete with 20 mm stone ballast and grounting of foundation bolt for support pipe and complete plastering etc.

Complete commissioning of inter locking system with main panel and accessories include. Its testing at site.

Perfect Power Transformer Associates

Versha and Brothers