Refurbishment of Existing On Load Tap Changer at Adobe Creek Substation - AC21

Description: The City of Palo Alto Utilities is seeking quotes to refurbish the existing load tap changer on the Allis Chalmers 15-MVA transformer at Adobe Creek Substation AC-21. The work includes replacing the existing TLH-21 unit with a certified remanufactured component, repairing radiator valves and seals, re-gasketing, and processing and refilling transformer oil. The contractor must perform pre- and post-work electrical and oil-condition tests, including transformer-turns-ratio, power-factor, winding-resistance, oil-quality, and sweep-frequency-response-analysis tests.