ELECTRICAL WORK

Amount

Shifting of Main Tank of the dismantled 40MVA 132/33 KV Transformer from its Plinth to designated place up to 20 Meter Distance including Turning of the Tank, as Required at 220KV Sub Station Debai.

Additional Shifting of the Tank of above Transformer up to 130 Meter Distance. (1 Job for every 5 Meter and / or Part thereof).

Shifting of Main Tank of the dismantled 100MVA 220/132KV Transformer from its Plinth to designated place up to 20 Meter Distance including Turning of the Tank, as Required at 220KV Sub Station Debai

Additional Shifting of the Tank of above Transformer up to 130 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 220KV Sub Station Debai.

Additional Shifting of the Tank of above Transformer up to 30 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 include 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 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.

Centrifuging of T/F Oil 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, and 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.

Earthing of Main Tank, Marshaling Box, OLTC Drive Mechanism Box, Transformer Neutral etc. of new 160MVA 220/132KV Transformer with the help of 50 x 6 mm / 75 x 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 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 Moose/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.

Fabrication of 3 Meter long electrodes with following MS Rod having 150 mm long conical shape and then its placing vertically inside the ground with 700mm below ground level including cutting turning and machining of electrode.

Delta earthing of 220/132 KV , 160 MVA Transformer nuetral by 150 mm long conical shape its placing inside the ground in shape and connecting all 3 Nos electrodes with 75x10 mm MS flat laid on its edge and then this tringle shape be connected to main earth mat at two place in opposite direction strictly as per drawing. (A) 220/132 KV 160 MVA Transformer ( Tringular shape by 03 electrodes)

Safe Carriage of 50 KL Oil Storage Tank from designated Primary Sub Station within Approx. 100 Km distance to 220KV Sub Station Debai including its Shifting & Loading at designated Primary Sub Station and Unloading, Shifting & Placing at site at 220KV Sub Station Debai and Return back to the original site from where it was carriaged by.

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. I' 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 4lb Oil Sample for testing will be taken after 1 month of charging.

Shifting of 500 Nos Transformer oil drums in switchyard from one place to other place distance upto 150 meter at 220 KV Sub-Station Debai.

Installation of high velocity automatic water spraying system for 100 MVA T/F including laying of fire direction water pipe line valves Quartzoid, HVWS nozzles along with all material complete as per details. (A) Supply & installation testing commissioning of quick opening flood, deluge value of HD of 150 NB as per Max working pressure 10 Kg/cm2, as per specification (HD/Mather Platt/equivalent) (In nos.).

Supply & installation & Commissioning of gate value (sluice Valve/Butterfly valve) as per IS specification (IS Code: 14846) of (Zoloto/Kartar/Sir make) (In nos.) (A) 150 NB

Supply & installation & testing commissioning of “Y” Type strainer (Kartar/Sir/Kalpana/Agro make) of dia Max working pressure 7 Kg/cm2 (In Nos.) (A) 150NB

Supply & laying of different size of M.S pipe B class for fire water pipe line/support as per IS specification (IS Code-1239) Complete with elbow Tee Socket reducer etc. with anti-corrosive treatment with detail as below. (A) 150 NB

Supply & laying of different size of GI pipe B class for fire detection water pipe line as per specification (IS Code-1239) as per drawing enclosed complete with elbow Tee Socket reducer. (A)65 NB

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 Nut & Bolt. (A) 150 NB

Supply, Installation & Commissioning of high velocity water spray nozzles flow capacity 3.5 Kg./cm2 Spray core angle 900.

Supply & Installation & Commissioning of Quartzite bulb detectors (QBD) operate at 900C sensing at rated temp for actuation of the element 10-12 sec.

Supply, Installation & Testing Commissioning of fixed differential switch (Danfoss/Indfoss make) type pressure switch range 1-10 Kg cm2

Pressure gauge as per IS Specification IS Code-3624 Accuracy 5%

Versha and Brothers

Gupta Elect and Engg Works

Meena Elect & Engg. Works