Purvanchal Vidyut Vitaran Nigam Limited has published For Repairing Of 10 Kva Damage Transformers For Repairing Of 10 Kva Damage Transformers At Workshop Naini Under Ewd Prayagraj. Submission Date for this Tender is 29-10-2020. Transformer Supply Tenders in At Workshop Naini under EWD Prayagraj Uttar Pradesh. Bidders can get complete Tender details and download the document.
| Name of Work: Repairing of 11/0.4kv 10 KVA Damaged Transformer at workshop Naini under E.W.D. Prayagraj. | |||||
|---|---|---|---|---|---|
| Sl. No. | Item Description | Item Code / Make | Quantity | Units | |
| 1 | 1 | Handling and dragging of transformer from stacking yard to repairing hall including opening of top cover plate. | |||
| 2 | 1.01 | 10KVA | item1 | 1000 | Nos |
| 3 | 2 | Opening of top cover plate smoothly. | |||
| 4 | 2.01 | 10KVA | item2 | 1000 | Nos |
| 5 | 3 | Detanking of core and coil assembly , checking of transformer winding to assess the extent of damage. | |||
| 6 | 3.01 | 10KVA | item3 | 1000 | Nos |
| 7 | 4 | 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. | |||
| 8 | 4.01 | 10KVA | item4 | 1000 | Nos |
| 9 | 5 | 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. | |||
| 10 | 5.01 | 10KVA | item5 | 1000 | Nos |
| 11 | 6 | ‘‘Making of complete HV & 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. | |||
| 12 | 6.01 | 10KVA | item6 | 11000 | Kg |
| 13 | 7 | 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. | |||
| 14 | 7.01 | 10KVA | item7 | 1000 | Nos |
| 15 | 8 | 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. | |||
| 16 | 8.01 | 10KVA | item8 | 1000 | Nos |
| 17 | 9 | Retanking of core and coil assembly. | |||
| 18 | 9.01 | 10KVA | item9 | 1000 | Nos |
| 19 | 10 | Fitting of complete accessories of H.T. & L.V. Bushing and Bushing Rod on H.V. & L.V. side of transformer. | |||
| 20 | 10.01 | 10KVA | item10 | 1000 | Nos |
| 21 | 11 | Boxing up of repaired transformer including filling of gaps when necessary. | |||
| 22 | 11.01 | 10KVA | item11 | 1000 | Nos |
| 23 | 12 | Refilling of reclaimed transformer oil having sufficient dielectric strength and IR Value. Shifting the transformer to testing yard. | |||
| 24 | 12.01 | 10KVA | item12 | 1000 | Nos |
| 25 | 13 | 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 and redraging and stacking at identified place in the yard. | |||
| 26 | 13.01 | 10KVA | item13 | 1000 | Nos |
| 27 | 14 | Punching and welding of M.S. Plate on outside of transformer of size 100 x 50 mm x 3 mm on out side of transformer body. M.S. plate shall be supplied by the contractor. The detail of punching should be as below :\n(1) Name of Workshop\n(2) Name of Contractor\n(3) Agreement No. & Date.\n(4) Date of repair\n(5) Capacity\n(6) Unque No.\n | |||
| 28 | 14.01 | 10KVA | item14 | 1000 | Nos |
| 29 | 15 | 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. | |||
| 30 | 15.01 | 10KVA | item15 | 1000 | Nos |
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