The VFD-F series is a Variable Torque rated AC Drive that was specifically designed for fan and pump applications ranging from 1 to 300 hp. This series offers the capability of connecting four motors at the same time and running them consecutively. PID, Sleep/Wake, and undercurrent protection are additional features of the VFD-F series drive allowing it to be used in many applications including: Air Conditioning Systems, Blowers, Fountains, Water/Wastewater Treatment Systems, and Ventilation Systems to name a few.