Power_Transformer_Maintenance_Checklist_Unit_1_(2).pdf

This is a Power Transformer Maintenance Checklist for Unit 1 transformers at Deerhaven, a facility operated by GRU (Gainesville Regional Utilities) in Florida. The checklist provides a comprehensive maintenance and inspection protocol for power transformers, specifically addressing three transformers: T-61, T-62, and T-65. The scope of work for transformers T-61 and T-62 includes procurement and replacement of radiators, wiring between transformer cabinets and transformer components, along with complete testing and inspection. Transformer T-65 is limited to testing only. The life extension project aims to extend the operational life of these Unit 1 transformers for an additional five years.

The maintenance checklist outlines detailed inspection and testing requirements including physical condition assessment, control cabinet verification, liquid level confirmation in main tanks and bushings, equipment cleaning, temperature monitoring (ambient, winding, and top oil), and multiple performance tests including power factor winding testing, winding resistance testing, bushing testing, TTR (turns ratio) testing, and excitation testing. Additional requirements include calibration of temperature gauges with replacement if readings exceed 20 degrees off nominal, verification of pressure relief devices, liquid level alarms, sudden pressure relays, pressurized inert gas systems, loss of AC alarms, and fan operation. The checklist requires completion of a Testing Maintenance Order inspection sheet and includes provisions for personnel sign-off, comments documentation, and coordination with GRU relay technicians to ensure comprehensive maintenance and readiness of the transformers.