26RA003 - Amend-007 - VOL. 2 - T2 Redlines.pdf

This document is a Requirements Summary Sheet for a Little Goose 500 kV Spare GSU Transformer, referencing Reference Specification Section 48 19 23.04 26 from the U.S. Army Corps of Engineers.

The transformer specifications include nameplate data for a 500/230 kV, 500 MVA unit operating at 65°C rise, single-phase configuration with a maximum load loss of 576 kW. The unit features high-voltage and low-voltage bushings, separate control and power cabinets, and dual-tank nitrogen regulator systems. Key construction details specify stainless steel tanks with lifting lugs, explosion-proof design, and pressure relief devices with discharge piping. The insulating oil must meet ASTM D3487 Type II specifications. Control systems include oil temperature indicators, analog gauges, and pressure relief devices with manual isolation capability. Factory acceptance testing (F.A.T.) requires routine electrical tests per IEEE standards, dissolved gas analysis, winding resistance measurements, transformer oil analysis, leakage reactance testing with electronic data logging, and sweep frequency response analysis. The documentation includes comprehensive bills of materials organized across multiple elevation views and segments, detailing components such as cooling fans, radiators, bushings, oil drain systems, expansion tanks, protection devices, and auxiliary power transformers. Technical drawings provide plan views, elevations for all four transformer segments, and tank segment identification diagrams with core and frame grounding details. The specifications address operational requirements for a high-voltage spare transformer system suitable for utility-scale electrical infrastructure applications.