Product Description:

The FC-202P37KT4131F1074 is an AC variable frequency drive manufactured by Danfoss for the VLT FC 202 AQUA Drives series. The unit modulates the frequency and voltage of three-phase power to control centrifugal pump and fan motors that move water, effluent, or process liquids in municipal and industrial plants. By matching motor speed to real-time demand, the drive reduces energy use and lowers mechanical stress on connected equipment.

The inverter’s continuous output capacity is 37 kW, equivalent to 50 HP, so it can manage medium-sized pump installations without external gear reduction. It accepts a line supply of 380–480 VAC, providing compatibility with common low-voltage distribution systems. Installation follows Overvoltage Category III practices, indicating that the internal components can withstand transient events typically found in fixed wiring inside facility switchboards. Upstream circuit protection must be rated no higher than 100 A, which is the maximum prefuse rating that protects the rectifier and bus capacitors from fault currents. The drive tolerates a supply phase imbalance of up to 3.0%, allowing operation when transformer loading or feeder impedance causes unequal line voltages. An analog output supports loads down to 500 Ω, and digital outputs switch at 32 kHz to provide high-resolution status signals to supervisory controllers.

Continuous full-load service is available at an ambient temperature of up to 50 °C, provided panel ventilation removes waste heat. The electronics withstand humid atmospheres with a maximum relative humidity of 95%, noncondensing. Without derating, the drive can be mounted as high as 1000 m above sea level; between that elevation and 3000 m, it gradually reduces current output to limit thermal rise. Cable guidelines permit shielded motor leads up to 150 m or unshielded leads up to 300 m. A limit of one power-up per minute helps preserve capacitor life, while the IE2 efficiency class supports energy-saving targets.