Heavey Water Board-HWB has published Tender For Maintenance Of 220Kv Switchyard During Mta At Cpp, Hwp(Manuguru). Submission Date for this Tender is 24-01-2023. Switch Yard Tenders in Bhadradri Kothagudem Telangana. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Maintenance of 3 phase, CGL make 220KV SF6 Breakers, such as Tightening of line connections and painting [3 separate poles for each Breaker]at a height of 5Meter in the 220 KV switchyard at its position. Replacing of corroded nut and bolts. Note:Supply of paint and cleaning materials are covered in item Sl.No.9 |
| 2 | Maintenance of CTs in 220KV switch yardA] checking and tightening ofprimary connections at a height of 5 M.B] Tightening of secondary connections in the terminal Box.C] Thorough CT Insulator cleaning with dry cloth. |
| 3 | Maintenance of CVTs/PTs in 220KV switch yardA]checking and tightening of line connections at a height of 5 M.B] Cleaning and Tightening of secondary terminals and connections.C] cleaning and painting of top covers and base.Note: Supply of paint and cleaning materials are covered in item Sl.No.9 |
| 4 | Maintenance of lightning arrestors in 220KV switch yard.A] Checking and cleaning the insulator for dirt deposition.B] Checking and tightening of bolts of the earth connections. |
| 5 | Tightening of CT, PT, control wires in theIsolator/ Breaker Local panel, PT/CT marshalling box including dressing of cables and crimping of loose lugs. |
| 6 | Checking all the loose connections of all 220 KVOver head bus conductors at various points i.e at jumpers, clamps, insulators etc. tightening the bolts & nuts, string insulators cleaningat 10 M elevation in the entire switchyard covering the 5bays, wherever required the corroded bots & nuts to be replaced. |
| 7 | Maintenance of 3 phase 245 KV isolators [3 separate poles for each isolator] in 220KV switchyard.A] Tightening of Incoming & outgoing line connections on isolators side..B] Inspecting and cleaning the isolator main and earth switch contacts with solvent.C] Checking and tightening of all fixing bolts, drive tube lock nuts, drive lever and phase coupling clamp bolts etc. D] Checking the fixing bolt of the operating mechanism and railing the bearings.Note: Cleaning materials is covered in item Sl.No.9 |
| 8 | Maintenance of bus post insulators in 220KV switchyard.A] Checking and tightening of line conductor terminalsB] Cleaning of insulators with dry cloth. |
| 9 | Supply of following material for above works |
| 10 | CRC 2-26 electrical contact cleaner |
| 11 | Synthetic enamel industrial grade paint. Colour: Red(10 litres), Yellow(10 litres), Blue(10 litres), Smoke grey(25 litres), Green(10 litres). Make: Asian/Nerolac/Berger |
| 12 | General purpose thinner. Make: Asian/Nerolac/Berger |
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