Three-Phase Distribution Pad-mount Transformers

The City of Austin, dba Austin Energy, is seeking qualified contractors to provide three-phase pad-mounted distribution transformers on an as-needed basis. The transformers should be designed for use on concrete slabs and serving underground distribution electrical facilities. The specification outlines the minimum acceptable requirements for the transformers, including functional requirements, performance, materials, and testing. The contractor shall provide a manufacturer's test report for each transformer, and Austin Energy may conduct incoming inspections and tests to verify compliance with the specification. Key aspects of the job include: • Providing three-phase pad-mounted distribution transformers with ratings from 75 kVA to 2500 kVA • Ensuring compliance with IEEE, ANSI, and NEMA standards • Meeting specific requirements for fusing, bushings, terminals, and internal bushing leads • Providing high-voltage taps and switching equipment • Ensuring the transformer tank and compartment meet specific construction and safety standards • Providing a nameplate with specific information, including a bar code and human-readable interpretation • Meeting specific performance requirements, including insulation levels, temperature rise limits, and impedance • Providing routine and design tests, including no-load loss, load loss, and impedance voltage tests