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September 6, 2023
October 6, 2023
October 21, 2023
8372 Buttress Ln
Site Work
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$240,000.00
Public - City
8372 Buttress Ln, Manassas, VA
Documents for this project are exclusively Specifications. If Plans become available, we will add them here.
The City of Manassas is soliciting Bids for a contractor to perform 24/40MVA, 230-13.2KV Transformer - HV and LV Bushings and HV Arresters Replacement at the Battery Heights Substation. The period of the Contract shall be for fifteen (15) days from the issuance of the Notice to Proceed. The Notice to Proceed will be issued within ten (10) days from the bid opening. 1. Perform pre-work external inspection of the transformer. 2. Perform pre-work electrical testing consisting of: Doble Power Factor (Windings, Bushings and Arresters), Doble Excitation in as-found DETC tap position, TTR in as-found DETC tap position, Insulation resistance (Windings and core), and Winding Resistance in as-found DETC tap position. 3. Perform pre-work oil tests consisting of Liquid Screen, Moisture and Dissolved Gas Analysis. 4. Drain 4907 gallons of oil from the transformer into supplied tanker. Oil will be followed down with dry air. 5. Continuous purge with dry air. Perform internal inspection. 6. Replace the 3 Qty 230KV HV and 4 Qty 25KV LV bushings. Contractor will provide the new HV and LV bushings and new gaskets. Contractor will provide soldering of the new HV draw lead connectors, if required. 7. Replace the 230KV HV station class arresters. Contractor will provide the new arresters. 8. Install new gaskets on all manhole covers. 9. Pressurize transformer at 5-7 psi and perform leak checks of the transformer. 10. Perform Dew Point Test.
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