SUPPLY AND REPLACEMENT OF GASKETS AND OTHER ASSOCIATED WORKS TO PREVENT LEKAGE OF OIL FROM THE TOP COVER OF 40 MVA TRANSFORMER No.2ND INSTALLED AT 132 KV S/S NAUTANWA, MAHARAJGANJ UNDER ETD-II , GORAKHPUR

Amount

The following works are carried out for replacement of Gaskets of 40 MVA T/F-II (AREVA make) along with other associated works at 132 KV Sub Station Nautanwa with all cost of men , misc. consumables , Crane , Hydra , Centrifusing machine , Normal & Special T&P , any other accessories works like cleaning of oil tank (with oil or as required ) etc. required for satisfactory completion of the job as per Technical specification & Direction of the Supervising Engineer, as per details below :-

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 40 MVA Transformer-II into oil Tanker / Oil Drums and stacking them at proper place.

Complete dismantling of the 40 MVA T/F as required for Gasket replacement. The scope of work involves dismantling of HV , LV & Neutral Bushing , Turrets , Radiators , Conservator Tank, Explosion vent Pipe , Buchholz relay , Oil Pipe lines , Flanges , valve , 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 40 MVA Transformer. The scope of work involves replacement of gaskets , removal of old / damaged Rim Gaskets of Transformer's . Top Cover and old / damaged gaskets of different parts of the transformer by cleaning of surfaces. Providing and fabrication of Gaskets out of good quality Rubberized Cork Sheet Gasket of Konica Troborze / Nu-cork make having Temperature Bearing capacity around 3800 C and Fixing the Gaskets with Adhesive at Rim & other surface including Bushing 'O' Rings etc. as per requirement.

Cleaning of Transformer Core and winding by Hot Transformer Oil and removing the complete sludge from bottom by Hot flushing with centrifusing machine.

Complete Erection of 40 MVA Transformer-II by erection of HV / LV / Neutral Bushings , Turrets , Radiators , Conservator Tank, Explosion vent Pipe , Buchholz relay , Oil Pipe lines , Flanges , valve , Cooling fans etc. at the original place complete evacuation of main tank of the Transformer and filling of dry Nitrogen / Dry Air of Dew point - 500 C or better in Vacuum up to pressure of 0.25 Kg g / cm and the again evacuating the transformer tank after required time interval (approx 12 Hrs. ) using centrifusing machine. The scope of work involves measuring Dew point values of N2 after every cycle till the required value is achieved.

Centrifusing of Oil filled in oil tanker , Un-Interrupted till the desired BDV value of the achieved oil is Achieved. Filling of Transformer oil into Main Tank and Radiators from oil Tanker, then centrifusing & 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 centrifusing machine , its operator , all associated T&Ps etc. shall be arranged by the contractor at his own cost.

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 40 MVA Transformer including its Main Tank , Main / OLTC Conservator tanks , Radiators , Headers , associated pipe lines , support structures , marshalling box etc. by one coat of Red Oxide Primer and then applying 02 coat of Smoke Gray 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 surface , clening & washing of dust / dirt / oil deposits.

Carriage of 20 KL Oil Tank from 132 KV S/s FCI, ETD-I, Gorakhpur to 132 KV S/s Nautanwa ETD-II Gorakhpur for purpose of storing of oil after draining from T/F including cost of loading / unloading / transportation / truck / driver and any other T&P as required for carriage work.

Meena Elect & Engg. Works (BID ID -4832934)

ATLANTURE TRANSFORMER AND SWITCH GEAR PVT LTD (BID ID -4952534)

M/s. ADITYA TRADING CO., KM-383, RAIDOPUR OFFICERS COLONY, AZAMGARH, U.P.-276001. (BID ID -4962839)