Product Description:

The FC-202N90KT4131B9530 is a Danfoss variable-frequency drive within the VLT FC 202 AQUA Drives series that regulates three-phase induction motors used in water and wastewater automation. It converts fixed mains power into a variable output waveform for controlling pump or blower speed. This control allows process systems to adjust flow according to real-time demand, reducing energy consumption and mechanical stress on connected equipment.

The drive can deliver a continuous motor output of 90 kW, equivalent to 125 hp, while drawing an input current of 145 A from a 380 to 480 VAC supply. The power stage provides a displacement factor of 0.99, while the apparent power at 460 V reaches 128 kVA for upstream transformer sizing. The microcontroller can switch the output at frequencies up to 32 kHz, permitting low-ripple torque across the 160 A motor terminals. The analog feedback circuits support a load resistance of up to 500 Ω for proportional signals. Overall heat dissipation is 1,474 W, which must be considered when designing panel ventilation. The standard three-phase topology eliminates the need for phase-conversion hardware.

The electronics maintain rated performance at ambient temperatures up to 50 °C and down to 0 °C, provided that the installation altitude does not exceed 1,000 m. The short-term overload capacity permits an output current of 176 A for 60 seconds, providing additional current for pump startup under heavy hydraulic load. Line protection requires a 250 A prefuse to coordinate fault interruption with the drive’s input stage. Derating rules apply when unshielded motor cables longer than 300 m are installed because cable capacitance and electrical noise increase with distance. A shielded motor cable can have a maximum length of 150 m before additional output filtering is required. Proper shield termination helps control common-mode noise when the drive operates at high carrier frequencies.