Public Works Department-PWD has published Tender For Maintenance Of Water Supply System Repairs Servicing And Replacement Of Worn Out Damaged Parts Of On Load Tap Changers Of 33Kv 3 3Kv 2000Kva Transformer At Verna Pumping Station. Submission Date for this Tender is 20-06-2023. Transformer Supply Tenders in South Goa Goa. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Servicingof On Load Tap Changermake CTR, type EN 16 , of2000KVA,33KV/3.3KV transformerat Verna pumping stationbyManufacturer/Experienced Service technician. The transformer and OLTC" shall be safely disconnected from the HT supply and shall beearthed onHV and LV sides oftransformers.The detailed scope of work is as under : a) Visual checking&functioning ofOLTCDrive mechanismparts: |
| 2 | i) Electrical connections ,ii)Heater, thermostat & switch, iii) Contactor operation,iv) Motor & gear operation,v) Motor protective relay operation,Aux. transformer, vi)Limit switch operation,vii) energy accumulation spring function, viii) DM box door gasket,ix) Condition ofsealing gasketsincludingLubrication/ greasing all gears teeth, Geneva lockingfaces , mechanical contactsand bearing surfaces, wipingtap position indicator dial switch fixed studs and smearing a electrolube oil. |
| 3 | b) Overhauling ofSelector/Diverter Switch :i) Checking Carbon deposition in selector switch chamber and cleaning the selector switch chamber ii) Cheking the erosion of fixed/moving contacts, iii)Checking tightness of OLTC contacts and phase board assembly.iv) Checking tightness ofCoppertubes, taper pins and bushings |
| 4 | board assembly, v) Checking tightness of Epoxy Arm assembly ( Main Moving and Resitance Moving Contacts) , vi) Cleaning of selector switch contacts, vii) Closing OLTC top Cover, ix) replacing OLTC top cover gasket , x) checking forlead clearance xi) Removingall carbon depositswith clean cloth before filtering, c) Operationalcheckingand testing of : i) Raise/Lower operations, ii) Step-by-step operation, iii) Tap position indication , iv) tap-change -in-progress indication, v)limiting Devices, vi) Operation counter, vii) Manual operation of drive Machanism ,etc. Complete as directed by Engineer in charge. |
| 5 | Oil filtrationof OnLoad Tap Changerof33KV/3.3KV, 2000KVA OutdoorTransformers, with 700litrsofoil CapacityatVernaPumping Station, including draining of OLTC oilindrums and refilling after filtration, required tools & tackles complete as directed by Engineer-in-Charge. |
| 6 | Supply, Replacement/TopingupofTransformer oil make Power oil of2 NosOnLoad Tap Changersof33KV/3.3KV, 2000KVA TransformersatVerna Pumping Station. |
| 7 | Supply and Replacement ofdefective/worn out parts ofCTR makeOnload Tap Changers moving mechanismtype EN16,of 33KV/3.3KV, 2000KVA transformersat VernaPumping Station. |
| 8 | i) Main Moving ContactAssy. |
| 9 | ii) Resistor Moving Contact assy. |
| 10 | iii) Fixed Contact assembly. |
| 11 | iv) Epoxy Arm Assembly For |
| 12 | v) Top/Bottom CoverGasket Set |
| 13 | vi) Oil Seal assembly |
| 14 | vii) Hardware |
| 15 | viii) Copper Braided Wire |
| 16 | ix) Copper Tube |
| 17 | x) Bakelite Phase Board |
| 18 | xi) Pivot Pin |
| 19 | xii) Transition Resistance Assembly 1 Set = 3NRS |
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