Purvanchal Vidyut Vitaran Nigam Limited Tender
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Purvanchal Vidyut Vitaran Nigam Limited - PUVVNL Tender
Eprocure
Opening Date30 Jun 2020
Closing Date13 Jul 2020
Tender AmountRefer Documents
Costs
EMD
₹ 8,000Document Cost
₹ 1,180Tender Fee
Refer Documents
Summary
Repairing Of 250 Kva Damaged Transformer
Description
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Contact
Tender Id
2020_PVVNV_488489_1Bid Award Id
ViewTender No
100/EWSC(V)/20-21Tender Authority
Purvanchal Vidyut Vitaran Nigam Limited ViewPurchaser Address
-Website
http://http://puvvnl.up.nic.in/
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Documents
BOQ Items
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250KVA
65
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Cleaning, removing the rust of tank etc of the repairable transformer and painting of inside of transformer tank with zinc chromate (Yellow) in two coats with spray painting machine. Zinc chromate (Yellow) shall be supplied by the contractor.
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250KVA
65
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Dismantling of core and coil assembly, opening of top yoke core, lamination. Removing of HV and LV Leg coils for assessing its reuse, reuse of major insulating material if possible, checking and recording of physical dimensions of coil.
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250KVA
65
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Reconditioning of minor damaged in HV/LV leg coil/ Strip of transformer. work includes removing of damage part DPC insulation and providing new DPC on same HV coil/LV Strip should be properly cleaned and should be made of same size as of original .
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250KVA
1118
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‘‘Making of complete LV leg Alu. Leg coils identical to original one with same number of turns, weight etc providing super enameled / DPC conductor/ Strip confirming to IS 1971 /53 in place of old and damage coil. Alu. coil, wire strip will be provided by the department. All coil assembly of identical voltage shall be interchangeable without requiring any special equipment. Coil shall be supported between adjacent sections by insulations, spacers, beamers and other insulations. Rewinding shall be arranged to ensure free circulation of oil to reduced hot spots in winding. The insulation of coil shall be treated with suitable insulating, varnish or equivalent compound to develop the full electrical strength of winding as per original design.
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250KVA
1677
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‘‘Making of complete HV leg coils for 11/.4 KV 250 KVA Alu. wounded Transformers from old and damaged Alu. coil/strip. The work will involve removing complete old insulation and cleaning of wire/strips and covering the wire/strips with new DPC insulation and rewinding of coil identical to original one with same number of turns, size, dimension and weight etc including, providing, insulating varnish and baking to develop full electrical strength of new winding as per original design.
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250KVA
4680
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Assembly of core and coils and fitting of top yoke and other parts. Replacement of insulation such as press board, craft paper, making support between adjacent section by insulating spacers and wrapping etc. shifting of repaired core coil assembly and placement inside the oven for proper dry out.
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250KVA
65
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Taking out the core coil assembly from oven and shifting the same in assembly yard. Connection of HV Coils and its delta formation, LV connection and its star formation. Fixation of insulating material wherever necessary. Tanking out leads fortap changer contact surface between movable and fixed contacts, tap changer should operate smoothly and there should be no gap between fixed and moving contacts. Retightening of core, coil assembly to match with tank dimension. Clearance between coils, core and tank body to be as per design so that unnecessary losses are avoided. Retanking of core and coil assembly, refitting of tap changer assembly in operating condition and electrical connection of the tap changer.
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250KVA
65
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Dragging out empty tank form yard to repairing hall
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250KVA
65
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Fitting of complete accessories of H.T. & L.V. Bushing and Bushing Rod on H.V. & L.V. side of transformer.
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250KVA
65
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Refilling of reclaimed transformer oil having sufficient dielectric strength and IR Value. Shifting the transformer to testing yard. Refitting of top cover plate, and fixing of rubberized cork sheet, breather assembly after filling of dry silicagel.
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250KVA
65
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Testing the correctness of connection, DVDF, No load, load loss test (where available), High Voltage, impedance voltage, Short Circuit and open circuit test, Voltage ratio on various tap position.
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250KVA
65
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Punching and welding of M.S. Plate on outside of transformer of size 100 x 50 mm x 3 mm on outside of transformer body. M.S. plate shall be arranged by the contractor. The detail of punching should be as below :
(1) Name of Workshop
(2) Name of Contractor
(3) Agreement No. & Date.
(4) Date of repair
(5) Capacity
(6) Unique No.
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250KVA
65
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Painting outside of the tank by synthetic enamel paint of smoke grey shade in two coats after providing red oxide primer. Red oxide primer and synthetic enamel paint shall be provided by the contractor.
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250KVA
65
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