CONSTANT TORQUE VFD Requirements: • Complete Table D1 of the "Agribusiness Incentive Catalog Supplemental Data Sheet" for this measure. • For the "VFD Application" column, enter "Conveyor," "Auger/Mixer," "Extruder," "Hoist," "Crusher," "Positive Displacement Pump," or "Other" and then describe the VFD controlled application. • For the "Controls Before VFD" column, enter "On/Off," "None," or "Other" and then describe. • Complete Table D3 of the "Agribusiness Incentive Catalog Supplemental Data Sheet" for this measure if the proposed VFD speed is controlled manually for its respective constant torque application. • VFDs must be installed on constant torque equipment (e.g. conveyors, augers, positive displacement pumps, extruders, mixers, centrifuges, crusher/shredders). • See measure descriptions below for minimum annual operating hours for the system using the VFD. • Individual motors controlled by a VFD may not exceed 500 horsepower. VFDs controlling motors larger than 500 HP may be eligible for a custom incentive. • Redundant or back-up units do not qualify. Routine replacements of existing VFDs do not qualify. • Incentive is based on motor HP controlled by VFD. • VFD speed can be automatically controlled by differential pressure, flow, temperature or other variable signal, or manually controlled. • Units installed only to allow soft starts are not eligible. The system controlled must have significant load diversity that will result in savings through motor speed variation. • Air compressors are not eligible for this offer. Instead, use the "Variable Speed Drive Air Compressors" on page 11 of the Process Systems Incentive Catalog. • For new construction projects, VFDs that are required in accordance to Wisconsin Energy Code are not eligible. • VFDs may not be beneficial in pump systems where static head makes up a large portion of the total system head. It is also important that the load on the system vary over time to take advantage of the savings that a VFD can provide. Be sure to understand these aspects of your system and discuss them with the equipment vendor or Energy Advisor in advance of applying VFD technology. EQUIPMENT UPGRADES AND RETROFITS Measure Description Code Incentive Unit VFD, Constant Torque (≥1000 Annual Operating Hours) AG3836* $45 HP
VFD, Constant Torque (500-999 Annual Operating Hours)
AG4412*
$30
HP
* Supplemental Data Sheet needed NEW CONSTRUCTION AND MAJOR RENOVATIONS Measure Description
Code
Incentive
Unit
VFD, Constant Torque (≥1000 Annual Operating Hours)
N-AG3836*
$40
HP
VFD, Constant Torque (500-999 Annual Operating Hours)
N-AG4412*
$20
HP
* Supplemental Data Sheet needed
PRO TIP VFDs can achieve energy savings in pump, fan, or constant torque applications where the load varies based on temperature, pressure, or flow. VFDs can be applied to systems with hundreds of motor horsepower or down to fractional horsepower.
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