REPLACEMENT OF DEFECTIVE 160MVA 220/132KV TRANSFORMER (BHEL MAKE AND REPAIRED BY M/S. ADITYA) BY NEW 160MVA 220/132KV TRANSFORMER ALONGWITH OTHER ASSOCIATED WORKS

Amount

Replacement of defective 160MVA 220/132KV T/F (BHEL make and Repaired by M/s. Aditya) by new 160MVA 220/132KV T/F alongwith other associated Works at 400KV Sub Station Sarnath, Varanasi, with all Cost of Men, Misc. Consumables, T&Ps, Crane / Hydra, Centrifuging Machine, CFM Operator, CFM Lubricant etc. Required for Satisfactory Completion of the Job, as per Technical Specifications & Direction of the Supervising Engineer, as per Details below :

Dismantling of RTCC Panel of the defective 160MVA 220 / 132KV Transformer including Disconnection of Control Cables, Cutting of its Earthing and then Shifting the dismantled RTCC Panel from Control Room to stores / designated place at the Sub Station.

Dismantling of existing 3 No. 132KV LAs with Auxiliary structure alongwith associated Structures installed in defective 160MVA 220 / 132KV Transformer Bay after due Cutting of Earthing, Opening of Jumpers etc.

Complete Dismantling of all the Water & Air Pipe Lines, Pipe Supports etc. of Mulsifyre System around the defective 160MVA 220/132KV Transformer alongwith Shifting & Stacking of all the dismantled Items at Safe Storage Place at the Sub Station.

Opening of HV & LV side Jumpers, Removal of Neutral & Main Tank Earthing, Opening of Control & Power Cable Connections of defective 160MVA 220/132KV Transformer including Opening of Connections of associated OLTC & Marshalling Box.

Complete Dismantling of the Accessories of defective 160MVA 220/132KV Transformer including Removal of Earthing, Opening of Cable Connections, Draining out the Transformer Oil up to Required Level in 209 Lit. capacity Oil Drums, Removal of Conservator Tank, Radiators, Pipe Lines, Bushings etc. after Draining of Oil in Radiators, Cooling Fans, Marshalling Box, etc., then Fixing of Blanking Plates on the Radiators, Pipe Lines, Conservator Tank Turret etc. (Blanking Plate including Bolts & Nuts, as Required shall be Provided by the Contractor)

Shifting & Proper Stacking of all the dismantled Items of defective 160MVA 220/132KV Transformer i.e. Conservator Tank, Pipe Lines, Bushings, Cooling Fans & Pumps, Marshaling Box, Radiators, Headers, 'A' Frame, T/F Oil in Drums etc. at Safe Storage Place at the Sub Station.

Proper Packing of HV / LV / Neutral Bushings of dismantled defective 160MVA 220/132KV Transformer in Separate Wooden Cases / Crates after Proper Wrapping of Bushings with Polythene Sheet alongwith Repairing of Wooden Cases / Crates, as required..

Shifting of Main Tank of the dismantled defective 160MVA 220/132KV Transformer from its Plinth to designated place up to 20 Meter Distance including Turning of the Tank, as Required at 400KV Sub Station Sarnath, Varanasi.

Additional Shifting of the Tank of above Transformer up to 290 Meter Distance. (1 Job for every 5 Meter and / or Part thereof).

Shifting of Main Tank of the new 160MVA 220/132KV Transformer to its Plinth from Place of Unloading up to 20 Meter Distance including Turning of the Tank, as Required at 400KV Sub Station Sarnath, Varanasi.

Additional Shifting of the Tank of above Transformer up to 45 Meter Distance. (1 Job for every 5 Meter and / or Part thereof).

Complete Erection of the new 160MVA 220/132KV Transformer including its Radiators, Conservator Tank, Turrets, Connecting Pipe Lines, HV / LV / Neutral Bushings, Cooling Fans, OLTC Drive Mechanism Box, Marshaling Box, OTI, WTI, Capillary Tubes etc.

Complete Evacuation of new 160MVA 220/132KV Transformer Main Tank and Filling of N2 of dew Point (-) 50 °C or Better in Vacuum up to Pressure of 0.25 Kg / Cm² and the again Evacuating the Transformer Tank after Required Time Interval (approx. 12/24 Hrs.) using Centrifuging Machine. The Work shall included Connecting Pipes of Machine as Required and Measuring Due Point Values of Dry Air after every Cycle till the Required Value is Achieved. Dew Point Meter (recently calibrated by NABL) shall be arranged by the contractor. The above works involves minimum 3 Cycles of evacuation and 3 Cycles of N2 filling, however if results are not up to the mark 1 more cycle of evacuation and N2 filling will be done by the contractor.

Performing the Vacuum stand test. The scope of work involves creating the vacuum inside the new 160MVA 220/132KV Transformer up to -760 mm of Hg for evacuation of moisture from core & winding and maintaining the pressure at least for 72 hours.

Loading, Shifting and Unloading of 3 No. Oil Tank of Capacity 20KL with the help of Hydra / Crane from Storage place to Working site near new 160MVA 220/132KV Transformer and put back the same from Working site to safe Storage place after Completion of Job as per instruction of Supervising Engineer.

Centrifuging of T/F Oil (60 KL) in Oil Storage Tanks, un-interrupted till the desired BDV Value of the Oil is achieved and then Filling & Topping up of the Centrifuged T/F Oil in Transformer as per Standard Procedure to Maintain required Oil Level in the Transformer including Commissioning of Air Cell if required. Centrifuging & Circulation of T/F Oil in Transformer, un-interrupted till the desired BDV Value of the Oil & IR Values of Bushings are achieved including Hourly Recording all the Parameters such as Temp., Vacuum, Insulation Resistance etc. Centrifuging Machine (Minimum 12KL capacity with 2 No. high vacuum pump of capacity 3000LPM and Root Pump of capacity 1500LPM), its Operator and all associated T&Ps shall be arranged by the Contractor at his own cost. PPM Meter (recently calibrated by NABL) shall be arranged by the contractor.

Earthing of Main Tank, Marshaling Box, OLTC Drive Mechanism Box, Transformer Neutral etc. of new 160MVA 220/132KV Transformer with the help of 50 × 6 mm / 75 × 10 mm size M.S. Flats to be Provided by Department, its Jointing with already Laid Earth Mat & Delta at 2 Places including necessary Modifications in existing Earthing Strip Support Structure and then, Painting of the Earthing Strips above Ground Level with 2 Coats of Synthetic Enamel Paint in Bus Green Colour.

Erection of 3 No. 132KV LAs including Erection of associated ALP Structures, Earthing of the LAs with existing M.S. Flat and Jumpering with ACSR Moose Conductors to Connect with 132KV Jack Bus with the help of ACSR Moose Conductor, associated Terminal Connectors, P.G. Clamps etc.

Erection of RTCC Panel of new 160MVA 220/132KV Transformer after Shifting of RTCC Panel from Stores / designated place to Control Room, then Making Cable Terminations as per Cable Schedule and Making Earthing of the RTCC Panel.

Jumpering of HV side Bushings of new 160MVA 220/132KV Transformer to Connect with HV side 220KV LAs with ACSR Zebra Conductor, associated Terminal Connectors etc.

Jumpering of LV side Bushings of new 160MVA 220/132KV Transformer to Connect with 132KV Jack Bus with the help of ACSR Moose Conductor, associated Terminal Connectors, P.G. Clamps etc.

Making Terminations / Connection of the Control & Power Cables as per Cable Schedule of new 160MVA 220/132KV Transformer, RTCC Panel, Control & Relay Panel, Cooling Fans, Pumps, Marshalling Box, OLTC Driving Mechanism etc. using existing Cables including Laying, Dressing & Binding of additional Control Cables, if required as per Site Requirement alongwith Making necessary Holes in the Gland Plate/ Box, wherever required including Providing & Fixing of Cable Glands of appropriate sizes, Providing of Ferrules etc.

Safe Carriage of 20 KL Oil Storage Tank from designated Primary Sub Station in Varanasi within Approx. 100 Km distance to 400KV Sub Station Sarnath, Varanasi including its Shifting & Loading at designated Primary Sub Station and Unloading, Shifting & Placing at site at 400KV Sub Station Sarnath, Varanasi.

Variable frequency Tan Delta Test and SFRA Test of new 160MVA 220/132KV Transformer with appropriate & recently calibrated kit.

Breakdown Voltage Test, Water Content Test, Dielectric Dissipation Factor Test, Resistivity and Dissolved Gas Analysis (as per IS Norms) along with collection charges of 4 No. Oil Samples of new 160MVA 220/132KV Transformer. 1st Oil Sample for testing will be taken before charging, 2nd Oil Sample for testing will be taken after 24 hrs. of charging, 3rd Oil Sample for testing will be taken after 7 days of charging and 4th Oil Sample for testing will be taken after 1 month of charging.

Re-Modeling, Erection, Hydraulic Testing & Commissioning of Complete Mulsifire System on new 160MVA 220/132KV Transformer installed in Place of defective 160MVA 220/132KV Transformer - I alongwith other associated Works at 400KV Sub Station Sarnath, Varanasi by Installation of High Velocity Automatic Water Spraying System including Laying, Fixing & Fitting of G.I. Pipe Lines complete with Elbows, Tees, Sockets, Flanges, Bends, Fire Nozzles of Required sizes, Q.B. Detector Assembly with Quartzite Bulbs, Pressure Gauges, Pressure Switches, Deluge Valve etc. after due Cutting, Extending of Pipe Lines, Providing of Gaskets / Packing of Required sizes including Installation of 80 mm dia. G.I. Pipe Supports by due Construction of RCC Foundation with Grouting of Foundation Bolts, Providing & Fixing of Round Clamps on Support Pipes alongwith 2 Coats Painting of Water Pipe Lines in P.O. Red Colour, Air Pipe Lines in Sky Blue Colour, Pipe Supports in Black Colour and Earthing Strips in Bus Green Colour Synthetic Enamel Paint after applying of 1 Coat of Red Oxide Primer, with all Cost of Men, Materials, Misc. Consumables, T&Ps etc. Required for Satisfactory Completion of the Work as per Technical Specifications & Direction of the Supervising Engineer, as per Details below :

Supply & laying of MI pipe ’B’ class Jindal / Tata make upper ground as required of different size for fire direction water pipe line support as per IS Specification (IS code-1239) as per drawing enclosed complete with elbow tee socket reduce nuts and bolts with detail as below with anticorrosive treatment or painting as where required along with fabrication & fixing of L &U shape support with associated work to complete the job in all respect

Supply & installation of 80 NB MS pipe B class Jindal / Tata make for making support running of water /air pipe line including providing flange on bottom & its proper grouting with fastener as where required.

Supply & installation of flanges as per IS-1538 of different size as per drawing work include proper butt welding with pipe & proper packing and coupling with nuts & bolts and fastener as required

Supply & Installation & commissioning of high velocity water spray nozzles flow capacity 305 kg /Cm2 spray angle 9

Supply & installation & commissioning of Quartzite bulb detectors (QBD) operator as 76°C sensing at rated temperature for actuation of the element 10/12 sec.

Supply & installation & commissioning of gate valve as per technical specification (IS Code 14846) 150 NB.

Supply & installation & testing commissioning of fixed different switch (Danfoss / Indfoss make) type pressure switch range 1-10 Kg./Cm2.

Pressure Gauge as per IS specification IS Code 3624 accuracy + -5%

Dismantling & installation including repairing of deluge valve by replacement of gasket & repairing of sheet repairing of alarm electrical connection of pressure switch including of control cable etc.

Laying upper ground as required of 150 NB old & use including modification as required MS pipe B class provided by department For fire water pipe line support as per IS specification (IS code-1239) as per drawing enclosed complete with elbow tee socket reduce nuts & bolts (provided by department) with detail as below with anticorrosive terminate or painting as where required along with fabrication & fixing of L&U shape support with associated work to complete the job in all respect. 150 NB.

Supply & laying of GI Pipe B Class upper ground of different size old & used including modification as required (provided by the department) for fire detection with anticorrosive terminate or painting as where required along with fabrication & fixing of L&U shape support with associated work to complete the job in all respect.

Re-installation of old & used including modification as required of 80 NB MS pipe B class (provided by department) by for making support running of water air/pipe line including providing flange on bottom & its proper grouting with fastener nut, bolt with anticorrosive treatment or painting as where required.

Re-installation & commissioning of old & used high velocity water spray nozzles flow capacity 3.5 Kg./cm2 spray core angle 90 (provided by department)

Re-installation & commissioning of old & used of Quartzite bulb detectors (QBD) operate at 76°C sensing at rated temp for actuation of the element 10/12 sec. (provided by department)

Re-installation & commissioning of 150NB Deluge valve as per requirement of transformer which includes servicing of related fitting like 150 NB T-Strainer 2 No. gate valve another related parts of deluge valve.

Perfect Power Transformer Associates

Gupta Elect and Engg Works