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 Date28 Nov 2024
Closing Date9 Dec 2024
Tender AmountRefer Documents
Costs
EMD
₹ 65,350Document Cost
₹ 3,540Tender Fee
Refer Documents
Summary
Repairing Of 11/0.4kv 160 And 250 Kva Aluminum,250 Kva (copper) 400 And 630 Kva Copper Wounded Damage Transformer
Description
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Contact
Tender Id
2024_PVVNV_978066_1Tender No
76/EWSC(V)/2024-25Tender Authority
Purvanchal Vidyut Vitaran Nigam Limited ViewPurchaser Address
-Website
http://http://puvvnl.up.nic.in/
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Documents
BOQ Items
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
Opening of tap changer connection detanking of core and coil assembly, checking of transformer winding to assess the extent of damage.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
Reconditioning of minor damaged in 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 .
-
-
-
160 KVA
60
-
-
250 KVA Al.
1204
-
-
250 KVA Cu.
864
-
-
400 KVA
4800
-
-
630 KVA
780
-
-
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.
-
-
-
250 KVA Cu.
2304
-
-
400 KVA
12800
-
-
630 KVA
2080
-
-
‘‘Making of complete LV leg coils from new/reconditioned DPC Strip of same size, number of turns and dimension as old one.
-
-
-
160 KVA
90
-
-
250 KVA Al.
1806
-
-
250 KVA Cu.
2016
-
-
400 KVA
11200
-
-
630 KVA
1820
-
-
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.
-
-
-
250 KVA Cu.
3936
-
-
400 KVA
17920
-
-
630 KVA
3200
-
-
‘‘Making of complete HV wire from new/reconditioned DPC wire of same size, number of turns and dimension as old one.
-
-
-
160 KVA
275
-
-
250 KVA Al.
5040
-
-
250 KVA Cu.
3444
-
-
400 KVA
15680
-
-
630 KVA
2800
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
Dragging out empty tank form yard to repairing hall
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
Fitting of complete accessories of H.T. & L.V. Bushing and Bushing Rod on H.V. & L.V. side of transformer.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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.
-
-
-
160 KVA
5
-
-
250 KVA Al.
70
-
-
250 KVA Cu.
40
-
-
400 KVA
160
-
-
630 KVA
20
-
-
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