Supply of Electric Utility Instrument Transformers

The City of Denton is soliciting proposals for the supply of completely assembled and tested instrument transformers for deployment on 13.2 kV, 24.9 kV, 69 kV, 138 kV, and 345 kV electrical systems, with proposals due November 11, 2026.

Transformers will operate at the Spencer Utility Site (1701C Spencer Road, Denton, Texas 76205) and other designated DME substation locations in the Denton area at approximately 640 feet elevation, under ambient temperatures from −20°F to 120°F with wind speeds up to 90 mph and fault currents of 35,000 amps symmetrical at high-voltage terminals. All equipment must be delivered FOB destination by open flatbed truck, with delivery accepted only between 8:00 a.m. and 3:00 p.m. Monday through Friday, excluding holidays.

Deliverables include completely functional Potential Transformers, Current Transformers, and Capacitive Voltage Transformers with secondary windings capable of producing both 115 and 67 volts; final drawings in AutoCAD format; certified test reports; and instruction books. All metallic parts must be corrosion-resistant (cast aluminum, hot-dipped galvanized steel, or stainless steel requiring no maintenance painting). Equipment must be hermetically sealed. All transformers must comply with ANSI, IEEE, NEMA, and EEI standards.

Suppliers must be authorized distributors approved to sell the manufacturer's products and must guarantee acceptance at any normally used United States approved repair and warranty shop. Equipment must carry comprehensive warranty coverage for a minimum of 12 months from first energization, with replacement units arriving within 60 days of submission. Field failures or repairs due to manufacturing defects remain the manufacturer's responsibility. Suppliers must provide a delivery schedule indicating availability of final drawings, test reports, and transformer delivery. All pricing must be FOB destination with freight and associated costs included. The City reserves the right to observe manufacturing processes and conduct independent quality control inspections.