07-ETC-I(A)/ 2024-2025

Amount

Following works are to be carried out for the work of replacement of damaged Gasket of 100 MVA T/F-I (NGEF make) alongwith other associated works with all cost of Men, Materials, Misc Consumables, Crane / Hydra, Normal & Special T&Ps, Rails etc. required for satisfactory Completion of work, as per Technical Specification & direction of the J.E. /A.E. as per details below :

Partially dismantling & safe stacking of Mulsifire air pipe line, water pipe line and proper stacking.

Complete drain out of the Transformer oil from 100 MVA T/F-I tank into 20 KL Oil Tank including opening of valve and filling in Oil Tank.

Dismantling of 100 MVA T/F-I HV/LV/TV/Neutral Bushing and its Turret, opening of all pipe line inlet/Outlet valve, inspection cover, Radiator Header, Gear Box, Buchholz relay, PRV, Oil pump , NRV & Jumpers for replacement of Gasket and jumpering of HV/LV side bushing after erection.

Providing and making of Top Cover Gasket of Transformer, Opening of Nut & Bolt, and removal of damage Gasket, cleaning of top surface & making new Gasket & fixing in proper gasket.

Replacement of Old and damaged gasket from different parts of the Transformers. The scope of works involves removal of Gaskets, Cleaning of surface, Fabrication of Gaskets of appropriate size of Konica/Telbroze/NE cork make and fixing of Gaskets at proper place with adhesive along with other associated works as per details given below-

Providing and making of HV Turret Gasket.

Providing and making of HV Bushing Gasket.

Providing and making of IV Turret Gasket.

Providing and making of IV Bushing Gasket.

Providing and making of Radiator Gasket

Providing and making of Radiator valve Gasket

Providing and making of Gasket of inspection cover.

Providing and making of Radiator pipe line 6 " dia.

Providing and making of C.T. inspection cover HV/LV

Providing and making of 1" Dia pipe pipe line Gasket.

Providing and making of Surge Relay Gasket.

Providing and making of Gasket Buchholz Relay.

Providing and making of Gasket of PRV

Providing and making of OLTC plate.

Providing and making of 1 " dia valve Gasket.

Providing and making of 2 " dia Valve Gasket.

Providing and making of 4" dia Valve Gasket.

Providing and making of TV Bushing Gasket.

Providing and making of N Bushing Gasket.

Providing and making of Flow indicator Gasket.

Providing and making of Gasket of oil pump

Providing and making of Gasket 3" dia Valve.

Providing and making of WTI/OTI Pocket.

Providing and making of Gasket of conservator tank.

Providing and making of Gasket of OltC tank.

Providing and making of nylon washer of radiator, Bushing Air releasing plugs.

Providing and making of Gasket of NRV

Providing and making of Gasket of MOG

Overhauling of diverter switch, removal the diverter switch from chamber cleaning by hot oil, removed the dirty oil and proper cleaning and fixing in original shape.

Erection of Turret HV / LV / IV side and erection of Bushing, Radiator, Header, Oil Pipe Line 6" and 3" Gear Box, OLTC Pipe Line, Pump, Flow meter, inspection Cover etc. for complete of work.

Performing the vacuum stand test, scope of work involves creating the vacuum inside the transformer upto 760 mm of Hg for evacuation of moisture from core & winding and maintaining the pressure at least 72 hours.

Complete Evacuation of main tank and filling of Dry Nitrogen 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 Hrs.) using centrifuging Machine. The Work shall include connecting Pipes of Machine as Required and Measuring Due Point Values of N2 after every Cycle till the Required Value is Achieved.

Centrifuging of T/F Oil storage Tanks, un-interrupted till the desired BDV & PPM 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 & Cirulation of T/F OIl in Transformer, un-interrupted till the desired BDV&PPM 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, Its Operator and all associated T&Ps shall be arrenged by the Contractor at his own cost.

Erection of Mulsifire system, Air /Water Pipe Lines, Proper replacement of Gasket and Tightening of Nut & Bolts.

Technocrat Electrical