Purvanchal Vidyut Vitaran Nigam Limited Tender
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Purvanchal Vidyut Vitaran Nigam Limited - PUVVNL Tender
Electrical Generators And Transformers
Electrical and Electronics
Eprocure
Opening Date1 Oct 2024
Closing Date15 Oct 2024
Tender AmountRefer Documents
Costs
EMD
₹ 6,200Document Cost
₹ 1,180Tender Fee
Refer Documents
Summary
Repairing Of 11/0.4kv 250 And 400 Kva Copper Wounded Damaged Transformer
Description
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Contact
Tender Id
2024_PVVNV_960827_1Bid Award Id
ViewTender No
45/EWSC(V)/2024-25Tender Authority
Purvanchal Vidyut Vitaran Nigam Limited ViewPurchaser Address
-Website
http://http://puvvnl.up.nic.in/
GEM & Bid Advisory Services
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Documents
BOQ Items
Opening of tap changer connection detanking of core and coil assembly, checking of transformer winding to assess the extent of damage.
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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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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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250 KVA
216
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400 KVA
510
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Reconditioning of LV Leg coils including removing of old double paper covering and cleaning of strip .Then providing double paper covering . Double paper covering other allied materials shall be provided by the contractor.
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250 KVA
504
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400 KVA
1190
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‘‘Making of complete LV leg coils from new/reconditioned DPC Strip of same size, number of turns and dimension as old one.
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250 KVA
504
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400 KVA
1190
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Reconditioning of HV wire including removing of old double paper covering and cleaning of wire .Then providing double paper covering . Double paper covering other allied materials shall be provided by the contractor.
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250 KVA
861
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400 KVA
1666
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‘‘Making of complete HV wire from new/reconditioned DPC wire of same size, number of turns and dimension as old one.
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250 KVA
861
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400 KVA
1666
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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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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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Dragging out empty tank form yard to repairing hall
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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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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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250 KVA
10
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400 KVA
17
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