Replacement of Gasket of 20MVA Transformer

Amount

Replacement of Gaskets of 20MVA Transformer-I & II (GEC make) along with other associated Works at 132KV Sub Station Banda, Shahjahanpur, with all Cost of Men, Misc. Consumables, Crane / Hydra, Centrifuging Machine, Normal & Special T&Ps, etc. Required for Satisfactory Completion of the Job, as per Technical Specifications & Direction of the Supervising Engineer, as per Details below :

Carriage of 20KL Oil Storage Tank from 220KV Sub Station in Shahjahanpur (within Approx. 60 Km distance) including Shifting & Loading of Oil Storage Tank at Designated Primary Sub Station and Unloading & Shifting of same in Switchyard at 132KV Sub Station Banda.

Removal of Jumpers of HV & LV side Bushings of the Transformer. The Scope of Work Involves Opening of Bolts & Nuts and Removal of Jumpers, Bushing Clamps etc.

Complete Draining of the T/F Oil from the 20MVA Transformer – I& II into Oil Tanker / Oil Drums and Stacking them at Proper Place.

Complete Dismantling of the 20MVA Transformer – I& II. The Scope of Work Involves Dismantling of HV / LV / Neutral Bushings, Turrets, Radiators, Conservator Tank, Explosion Vent Pipe, Buchholz Relay, Oil Pipe Lines, Flanges, Valves, Cooling Fans etc. along with Opening of associated Electrical Connections, Stacking of all the Dismantled Parts at Proper Place in the Switchyard including Proper Blanking of the Open Points before Replacement of Gaskets.

Complete Replacement of Gaskets of 20MVA Transformer – I& II. The Scope of Work Involves Removal of old / damaged Rim Gasket of Transformer's Top Cover and old / damaged gaskets of different Parts of the Transformer by Cleaning of Surfaces, Providing & Fabrication of Gaskets out of good Quality Rubberized Cork Sheet Gaskets of Konica / Troborze / Nu-Cork make having Temperature Bearing Capacity around 3800C and Fixing the Gaskets with Adhesive at Rim & other Surfaces.

Cleaning of Transformer's Core and Winding by Hot Transformer Oil and Removing the Complete Sludge from Bottom by Flushing with Centrifuging Machine.

Complete Erection of 20MVA Transformer – I& II by Erection of HV / LV / Neutral Bushings, Turrets, Radiators, Conservator Tank, Explosion Vent Pipe, Buchholz Relay, Oil Pipe Lines, Flanges, Valves, Cooling Fans etc. at its original Place.Complete Evacuation of Main Tank of the Transformer and filling of Dry Nitrogen / Dry Air of Dew Point -50°C or better in Vacuum upto Pressure of 0.25Kg/cm² and the again Evacuating the Transformer Tank after Required Time Interval (approx. 12 Hrs.) using Centrifuging Machine. The Scope of Work Involves Measuring Due Point Values of N2 after every Cycle till the Required Value is Achieved.

Centrifuging of Oil filled in Oil Tanker, Un-Interrupted till the desired BDV Value of the Oil is Achieved, Filling of Transformer Oil into Main Tank and Radiators from Oil Tanker, then Centrifuging & Circulation of the Oil in Transformer, Un-Interrupted till the Desired BDV Values of the Oil & IR Values are Achieved including Recording of all the Parameters such as Temperature, Vacuum, Insulation Resistance etc. every 2 Hours. Centrifuging Machine, its Operator, all associated T&Ps etc. shall be Arranged by the Contractor at his Own Cost.

Overhauling of Diverter Switch after Draining of Oil from OLTC Chamber, Flushing with Hot T/F Oil in OLTC Chamber and finally, Filling the Fresh Centrifuged Transformer Oil.

Jumpering of HV & LV side Bushings of the Transformer. The Scope of Work Involves Fixing & Tightening of Bushing Clamps with appropriate size Bolts - Nuts - Washers including Replacement of Clamps, Jumpers etc. as Required.

Outside Complete Spray Painting of above 20MVA Transformer – I& II including its Main Tank, Main / OLTC Conservator Tanks, Radiators, Headers, associated Pipe Lines, Support Structures, Marshalling Box etc. by 1 coat of Red Oxide Primer and then applying 2 coats of Smoke Grey Colour 1st Quality Synthetic Enamel Paint of Asian / Berger / Nerolac make at the Gap of 48 Hrs. Interval each with the help of Spray Painting Machine after due Rubbing & Cleaning of the Rusted Surfaces, Cleaning & Washing of Dust / Dirt / Oil Deposits from the Surfaces.

Carriage of 20KL Oil Storage Tank from 132KV Sub Station Banda to 220kv Sub Station in shahjahanpur (within Approx. 60Km distance) including Shifting & Loading of Oil Storage Tank at 132KV Sub Station Banda and Unloading, Shifting & Placing of same in Switchyard / Storage Place at 220kv Sub Station shahjahanpur.

LASHANI ENTERPRISES

M/s Abhinav Enterprises