WORK OF REPLACEMENT OF DAMAGED GASKETS AND OTHER ASSOCIATED WORK OF 132/ 33 KV , 63 MVA TRANSFORMER (ADITYA MAKE) AT 220 KV SUBSTATION BARAHUWA UNDER ETD-II, GORAKHPUR

Amount

Gasket replacement and other related miscellaneous works of 132/33 KV , 63 MVA Transformer (Aditya make) with other associated work and its painting at 220KV S/s Barahuwa , Gorakhpur under ETD-II , Gorakhpur .

Arresting of oil leakage of 132/33KV , 63 MVA Transformer (Aditya make) by way work for dismantling of 63 MVA Transformer accessories and replacement of gasket and its painting at 220KV S/s Barahuwa , Gorakhpur .

Dismantling of accessories of 132/33 KV , 63 MVA Transformer (Aditya make) including radiator , bushing , buchholz relay , oil pipe line from conservator tank oil pipe to OLTC and surge relay conservator tank .

Complete drain out of transformer oil from the existing 132/33KV , 63 MVA Transformer (Aditya make) to empty drum /40KL Tank .

Replacement of all gaskets including all HV bushing (R,Y,B & N phase) and LV bushing (R,Y,B & N phase) and top cover transformer by providing and fixing of new gasket as per existing size made of rubberized cork sheet Kotika/ Turboze / Nucork brand Grade -07.

Complete erection of accessories of 132/33 KV , 63 MVA Transformer (Aditya make) by erecting radiators , conservator tank , HV ,LV and Neutral bushing connecting oil pipe lines cooling fans etc. to complete the job and attending the oil leakage if any including all associated work satisfactory .

Centrifusing of complete T/F oil in Tank by connecting centrifusing pipes centrifusing the T/F oil through centrifusing machine to be provided by the contractor and taking the BDV value of the oil periodically till the required . The work includes all the work related to centrifusing the oil and filling the oil in T/F and conservator tank (centrifusing machine will be arranged by the contractor and electrical power will be provided by the department free of cost at one Paint.)

Creating the vaccum of main tank upto 700 mm of HG and maintaining it for period of 12 hrs. and filling of centrifusing oil step upto core & winding conservator tank radiator .

complete evacuation of 132/33 KV , 63 MVA T/F (aditya make) main tanker and filling of dry air / Nitrogen of dew point-50.C or better in vacum upto pressure of 0.25kg/cm2 and the again evacuating the transformer tank after required time interval (approx. 12-24 hrs) using centrifuging machine . The work shall including connecting pipe of machine as required measuring due point valuse of dry air during every cycle job (one job is defined as complete cycle of evacuation , filling and maintaining of dry air in the transformer main tank) till the required value is achieved .

Spray painting of 132/33 KV , 63 MVA transformer (Aditya make) with one coat of smoke gray good quality enamel paint after cleaning of rust , dust and oil spots etc.

Safe loading , shifting / carriage and unloading work of oil tank of capacity 40 KL by private vehicle arranged by contractor at his own cost from any available substation to 220KV S/s Barahuwa , Gorakhpur (Distance upto 200Km) with proper precaution of road safety rules during transportation of tank .

Checking and strenthining work of earthing of transformer body of 132/33 KV , 63 MVA Transformer (Aditya make) at 220KV S/s Barahuwa under ETD-II , Gorakhpur including proper digging of earth and jointing with flat size 75x10/50x6 mm to earthmate and connecting riser with body of transformer at two place including painting with one coat of red oxide and two coats of green colour . All consumables materials like paint of bus green colour of nerolac/berger/asian will be arranged by contractor .

Checking and strenthining work of delta earthing of HV & LV , neutral of 132/33 KV , 63 MVA Transformer (Aditya make) including proper digging of earth and jointing with flat size 75x10/50x6 mm and connecting riser with HV & LV , neutral of 132/33 KV , 63 MVA transformer (Aditya make) including painting with one coat of red oxide and two coats of green colour . All consumables materials like paint of bus green colour of nerolac/berger/asian will be arranged by contractor .

Sampling and Testing of transformer oil at CPRI testing lab including cost of transportation of samples in standard sampling bottles (adequate number of bottles to be arranged by contractor) . Samples to be taken at following intervals (as per actual requirement) (01 job for each sample) before charging of T/F main tank and OLTC samples .

Breakdown voltage

Partial Count

Dissolved gas analysis

Sediment & Sludge

Dielectric Dissipation factor (Tan delta)

Testing of 160 MVA Transformer at 220KV substation Barahuwa , Gorakhpur (Testing team with testing kit shall be arranged by the contractor) .

Insulation resistance Measurement test

Polarization index test

Magnetizing current test

Magnetic balance test

Vector group test

Voltage ratio test

Winding resistance measurement test

Tan delta and capacitance measurement test

Sweep frequency response Analysis test

All labour , T&P and vehicle etc. will be arranged by contractor . All materials like gaskets , paint etc will be arranged by contractor as per actual consumption . The above works is shutdown related , shutdown will be provided as per availability .

TAJ ENTERPRISES

SAI KRIPA LIFT SHIFT COMPANY

Gupta Elect and Engg Works