WRRF West Substation Transformer Repair

The City of Hayward is soliciting bids from qualified electrical contractors to fully repair and refurbish the West Substation transformer at its Water Resource Recovery Facility. The scope includes removal, transport, rewinding with new copper windings, replacement of insulation, filling with 466 gal of FR‑3 dielectric fluid, exterior painting, comprehensive testing, and re‑commissioning, all performed under City‑managed outage conditions. The contractor must hold a California C‑10 electrical license, demonstrate at least five years of transformer‑repair experience, and provide a one‑year warranty on parts and workmanship. Work must be completed within 20 weeks of contract award. • Repair of a 1500‑1932 kVA, 12 kV/480 V, 11,320 lb transformer (Square D/Schneider Electric) • New copper windings, insulation, and 466 gal of FR‑3 fluid • Full rigging, transportation, and on‑site re‑installation with City‑managed outage • Compliance with IEEE, NETA, NFPA 70, and California Electrical Code • Required testing: ratio, resistance, insulation, dielectric strength, tap‑changer, functional, temperature rise, dissolved‑gas (30 days) • Detailed work, safety, lifting, and quality‑control plans required • Minimum one‑year warranty; all work at no additional cost for defects • Contractor must submit qualifications, references, insurance, and City business license