FC-202N250T4134H1367 Danfoss
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The Danfoss FC-202N250T4134H1367 is part of the VLT FC 202 AQUA Drives series and supports a rated motor size of 250 kW or 350 horsepower. It operates on three phase power with a mains voltage range of 380 to 480 VAC and includes an RFI filter of Class A1/B. Horizontal and vertical brake power ratings are 20 kW and 90 kW, respectively.
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Product Description:
The FC-202N250T4134H1367 is an AC variable frequency drive manufactured by Danfoss and supplied within the VLT FC 202 AQUA Drives series. Designed for pump and blower applications in water and wastewater plants, the unit modulates induction motor speed to match fluctuating flow demand, reducing energy use and mechanical stress on piping. As part of an automated control loop, it receives process signals from PLCs or SCADA systems and adjusts its output frequency accordingly. This regulation allows pump output to follow process requirements without relying entirely on valves or other mechanical flow controls.
The drive operates from a mains supply of 380–480 VAC and accepts three-phase power, so no phase conversion is required. The inverter can operate motors rated up to 250 kW (350 hp), making it suitable for large centrifugal pumps and blowers. For dynamic stopping, the integrated brake chopper can dissipate 20 kW during horizontal service and 90 kW when the motor operates against vertical loads. The brake stages must connect to external resistors with a resistance of at least 1.6 Ω to limit current. Cable terminals accommodate 70 mm² conductors for horizontal axes and two parallel 70 mm² conductors for vertical axes. A factory-installed Class A1/B (C1) RFI filter helps control conducted and radiated electrical interference. Thermal overload monitoring trips at 98 A during horizontal duty and 207 A during vertical duty, protecting the brake resistor and connected wiring from excessive current.
Brake utilization is limited to a duty cycle of 10% during horizontal service and 40% during vertical service, so deceleration events must remain within the applicable thermal window. For repetitive braking, a nominal resistor with a resistance of 2.3 Ω balances heat dissipation and voltage clamping while reducing premature thermal-relay trips. The conductor sizes help control voltage drop between the braking circuit and the external resistor. Relay thresholds correspond to the braking arrangement and interrupt operation if the thermal load becomes excessive. These protective functions are especially important when high-inertia machinery requires frequent or extended deceleration.
