Product Description:

The FC-202P55KT6131N7825 is an AC variable frequency drive produced by Danfoss for the VLT FC 202 AQUA Drives series. Intended for centrifugal pumps and blowers, the unit converts fixed mains frequency into a pulse-width-modulated output, allowing process controllers to adjust motor speed accurately. This capability saves energy, minimizes hydraulic shocks, and extends equipment life in municipal and industrial water systems.

Its shaft output is rated at 55 kW, indicating the maximum continuous mechanical power available to a connected induction motor at nominal voltage and frequency. Upstream conductors must accommodate a continuous input current of 75 A, while downstream motor leads must carry up to 83 A without excessive voltage drop. An efficiency of 0.98 indicates that losses are limited to approximately 1.1 kW, simplifying thermal management inside a control cabinet. The drive maintains these values while operating from a three-phase power supply. Its components remain within thermal limits when the surrounding air temperature does not exceed 50 °C.

For short-duration overloads, the inverter can deliver 91 A, enabling quick acceleration or helping clear pipeline blockages without requiring an oversized motor. Supply protection is coordinated through a maximum upstream fuse rating of 160 A, ensuring fault currents are interrupted before semiconductor damage occurs. The overall design meets the IE2 efficiency target, supporting compliance with applicable regional energy requirements. The power stage supports an unshielded motor cable run of up to 300 m, allowing the drive to remain in a dry electrical room while the motor operates in the field. With 15 m motor leads, the output has a rise time of 0.276 µs and a peak voltage of 1.184 kV. When rapid deceleration is required, the external braking resistor must have a minimum resistance of 11.7 Ω, while its nominal resistance is 15.8 Ω.