FC-102P4K0T Danfoss
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The Danfoss FC-102P4K0T is part of the VLT FC 102 HVAC Drives series and offers a rated power of 4.0 kW with a rated horsepower of 5.0 hp. This model features two analog inputs, two relay outputs, and supports three phase power. It can handle a maximum output frequency of 590 Hz, a peak starting torque of 135% for 0.5 seconds, and operates in ambient temperatures up to 50 degrees Celsius.
Internal Product Review
The FC-102P4K0T is a Danfoss VLT FC 102 HVAC drive designed for three-phase power and rated at 4.0 kW. A 10 ms torque rise time and 135% peak starting torque support precise response and confident startup performance in HVAC systems. Strong control characteristics make this drive an excellent choice for efficient, dependable operation.
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Product Description:
The FC-102P4K0T is a variable frequency drive manufactured by Danfoss for the VLT FC 102 HVAC Drives series. It is supplied to building automation panels where it modulates induction motor speed in air-handling units, pumps, and chillers, allowing precise airflow or water circulation without mechanical throttling. By converting fixed mains power into a controlled output waveform, the drive helps maintain temperature and pressure setpoints in commercial and industrial HVAC systems.
This model operates from three-phase power and delivers a continuous shaft rating of 4.0 kW, which corresponds to 5.0 hp for applications sized in imperial units. The inverter can raise the output frequency to 590 Hz, permitting high-speed fan service or oversynchronous pump operation when required. Its control section supports motor acceleration with a torque step that reaches the full command in 10 ms, allowing a quick response to duct-static or differential-pressure feedback. The unit tolerates an overload of 110% for 1 minute, so short process surges do not trigger trips while the power section remains within its thermal limits. Two analog inputs accept demand signals such as 0–10 V or 4–20 mA, and two relay outputs send status information to building management controllers.
The drive sustains full output at ambient temperatures up to 50 °C, eliminating the need for additional enclosure cooling in most mechanical rooms. Installation altitude can reach 1000 m without derating, which accommodates most metropolitan building sites. Motor leads may be routed through up to 150 m of shielded cable, so the unit can remain inside a central electrical room while the motor operates on a distant rooftop. During startup, peak shaft torque climbs to 135% for 0.5 seconds, aiding fan acceleration against static pressure. A maximum ramp time of 3,600 seconds enables gradual acceleration to protect belt drives. The input accommodates a mains imbalance of 3.0% while maintaining a displacement power factor of at least 0.98 and a true power factor of 0.9.
