Product Description:

The FC-202P18KT4E21H1TGX is a variable-frequency drive manufactured by Danfoss within the VLT FC 202 AQUA Drives series. The unit converts fixed-frequency AC power into a modulated output that allows plant controllers to adjust induction motor speed in pumping and aeration systems, which is a common requirement in water and wastewater automation. By regulating motor torque electronically, the drive helps match pump operation to flow demand without mechanical throttling, reduces unnecessary energy consumption, and supports stable processes across municipal and industrial fluid-handling installations.

The input section accepts 380 to 480 VAC from a three-phase power supply, making the drive compatible with standard 400 V mains used in many treatment facilities. Its output is rated at 18.5 kW, which corresponds to 25 HP and supports mid-sized centrifugal or positive-displacement pumps. An internal EMC network meets RFI Class A1/B (C1), limiting conducted emissions and allowing the inverter to operate on suitable public low-voltage networks without an additional external filter. The input range, output capacity, and emission class must be considered when selecting supply cables, protective devices, motor conductors, and enclosure ventilation for the installation.

The integrated Safe Stop function removes motor torque without requiring the mains supply to be switched off, supporting controlled emergency stops and safe machine states. Local setup and monitoring are handled through a door-mounted Graphical Local Control Panel, which displays operating values such as power, speed, drive status, and active alarms. The drive uses an uncoated printed circuit board, so it should be mounted in a clean, humidity-controlled cabinet that protects the electronics from condensation and airborne contaminants. Its variable-speed control is suited to pumps, blowers, and aeration equipment that must respond to changing process demand while maintaining consistent motor operation.