Product Description:

The FC-101P11KT4E20H4XXC is an AC variable frequency drive produced by Danfoss for the VLT FC 101 HVAC Basic Drives series. This drive converts fixed-frequency, three-phase mains power into a modulated output that allows building automation systems to regulate centrifugal pumps, fans, and compressors. By varying motor speed in response to demand, it helps maintain airflow and fluid pressure while reducing energy consumption in industrial or commercial HVAC installations.

The inverter supplies a continuous output of 11 kW, giving it enough capacity to run medium-sized induction motors used in air-handling units and booster pumps. It connects directly to utility supplies in the 380–480 VAC range and is wired for three-phase power, eliminating the need for a step-up transformer when the available supply is within that range. The same electrical rating corresponds to 15 HP, a value commonly used for motors installed in existing HVAC equipment. An IP20 chassis enclosure makes live parts finger-safe, but the drive still requires installation inside a ventilated control cabinet. Panel airflow and protective devices should be selected according to the drive’s heat dissipation, available fault current, and applicable installation requirements.

Electromagnetic compatibility is improved by an integrated RFI class A1 (C2) filter, which attenuates conducted noise so the drive can share switchboards with sensitive HVAC sensors. The control electronics use a coated PCB that protects solder joints and components from airborne moisture commonly found in air-conditioning equipment rooms. The unit has no brake chopper, so deceleration profiles must prevent excessive DC bus voltage, and any required dynamic braking equipment must be provided externally. The housing includes no local control panel, so routine adjustments can be made through a fieldbus connection or a compatible detachable control panel.