Variable frequency drives and motor controllers (2023-UWMSN-00027-RFB)

The University of Wisconsin-Madison is conducting a Request for Bid (RFB 2023-UWMSN-00027-RFB) for the procurement of Variable Frequency Drives (VFDs) and Motor Controllers, specifically targeting HVAC applications. The solicitation, based on the DFD Master Electrical Specification dated September 8, 2022, seeks microprocessor-based VFD units with pulse width modulated output, variable torque design, and rated at motor full load nameplate amperage. Acceptable manufacturers include ABB, Toshiba, Danfoss, Trane/Danfoss, GE, Emerson, Yaskawa, Eaton/Cutler Hammer, Mitsubishi, and Allen Bradley. The VFDs must operate across input voltages of 10 percent, three-phase, 60 Hertz, with minimum efficiency of 95 percent at 100 percent speed and 85 percent at 50 percent speed. Key requirements include U.L. listing, 5 percent equivalent impedance to reduce harmonic distortion, and comprehensive control and protection features. The bid responses are due by January 11, 2023, and must be submitted online through the ShopUW+ sourcing platform, with all questions directed to Brad Bauman at brad.bauman@wisc.edu.

The solicitation does not explicitly outline specific set-aside designations or restrictions for disadvantaged enterprises. The VFD packages require a 24-month warranty from project substantial completion, covering all parts, labor, and service costs, with mandatory factory-trained technician startup and testing. Installation responsibilities will fall to the Division 26 (Electrical) contractor, who must ensure input power, output power, and control wiring are installed in separate conduits. The specification requires harmonic analysis compliance with IEEE-519-2014 standards and BACnet MSTP protocol integration for building automation systems where applicable. While no specific budget range is provided, the comprehensive technical specifications suggest a sophisticated procurement targeting high-performance HVAC infrastructure upgrades. Potential bidders must demonstrate technical capability to meet stringent performance, efficiency, and integration requirements across multiple voltage and performance specifications.