Military Engineer Services Tender

M&L for opening the top cover of transformer and carrying out the following work/repairs by speacialist technician/ engineer at factory work shop :- (a) Removing of transformer oil from transformer into seperate container. (b) Taking out the core and coil of transformer. (c) Repair of radiator & replacement of defective plate of core as per existing size. (d) Cleaning the transformer from inside properly by used transformer oil as per equipment manufacturer's guidelines and painting with one coat zink as per manufacturer norms. (e) Re-tanking and assembling of core and coil. (f) Ovening in vapour phase drying oven at factory workshop for 72 hrs. (g) Filling of new transformer oil. (h) Replacment of gaskets, hardware/consumables of silica gel breather, magnetic type oil level gauge, HT/ LT spindles and bushing etc of power transformer as per requirement. Repair/ servicing of winding termperature gauge and oil temperature gauge of power transformer as per requirement.

(i) Refixing of the transformer top cover with gasket, nuts, bolts and washers. (j) The following routine test as per IS 2026 (Part I) -1977 shall be carried out at repairing workshop having NABL Lab accredition and valid calibration of test equipments :- (i) Measurement of winding resistance. (ii) Measurement of voltage ratio and check of voltage vector relationship. (iii) Measurement of impedance voltage/short circuit impedance (principal tapping) and load loss . (iv) Measurement of no load loss and current. (v) Measurement of insulation resistance, (vi) Dielectric tests (k) The contractor/approved workshop shall give written warranty of two (02) years from the date of sucessfull testing by Rep of approved workshop / PSPCL technical team and installation of transformer by approved workshop. The contractor shall submit test report from Rep of approved workshop / PSPCL technical team for above tests. Notes:- (i) Transformer shall be opened at recommended workshop in presence of Rep of Accepting Officer. (ii) Re-winding/Testing shall be carried out in presence of Rep of Accepting Officer. (iii) Transformer oil, Gasket, Silica gel breather, magnetic type oil gauge HT & LT spindles and bushing shall be measured and paid separately under respective items of schedule as supply only. (iv) Minor/essential spare parts which is not considered as supply only shall be inclusive in quoted rate.

M&L for replacement of HV leg copper strips/coil with new copper strips/coils with new tripple paper cover (TPC) as per specification of copper conductor for 66/11 KV power transformer of capacity 4 MVA & matching with existing gauge and same number of turns including best quality insulation, varnishing by vaccuum impregnation and baking of coil assembly complete all as specified and directed to achieve designed voltage ratio all as per manufactures instruction complete all as specified and directed.

M&L for replacement of LV leg copper strips/coil with new copper strips/coils with new tripple paper cover (TPC) as per specification of copper conductor for 66/11 KV transformer of capacity 4 MVA & matching with existing gauge and same number of turns including best quality insulation, varnishing by vaccuum impregnation and baking of coil assembly complete all as specified and directed to achieve designed voltage ratio all as per manufactures instruction complete all as specified and directed.

Supply only transformer oil as per IS 335/93 having dielectric strength not less than 60 KV breaking voltage complete all as specified and directed.

Supply only gasket/hardware/consumables during the rectification work for 4 MVA, 66/11 KV transformer at Workshop complete all as specified and directed.

Supply only silica gel breather unit for 4 MVA, 66/11 KV transformer complete all as specified and directed.

Supply only magnetic type oil level gauge for 4 MVA, 66/11 KV transformer complete all as specified and directed.

Servicing and overhauling of taping switch complete with handle for 4 MVA, 66/11 KV transformer complete all as specified and directed.

Overhauling of OLTC (On Load Tap Changer) switch for power transformer capacity 4 MVA, 66/11 KV by inspection of diverter switch, fixed and moving contacts and resistance unit by following procedure as mentioned below :- (a) Dismounting and moving of OLTC. (b) Cleaning, visual inspection of mechanical components. (c) Visual inspection of insulation distances of the OLTC and the oil compartment/ OLTC tank. (d) Replacement of the insulating oil (New transformer oil with a dielectric strength of 60KV/ 2.5mm in compliance with IEC 60156). (e) Determination of the contact wear of switching contacts. (f) Measurement of the transistor resistors. (g) Parts replacement in accordance with manufacturer requirement and / or based on condition. (h) Inspection of the motor drive unit, drive shaft and protective devices. (j) Functional tests & documentation of test results as per OEM guidelines.