Product Description:

The 14.F4.C3E-3440 is a frequency inverter produced by KEB within the F4 Combivert Frequency Inverters series. As a COMBIVERT F4 device, it modulates three-phase mains power to regulate induction motor speed and torque in automated machinery and process equipment. By varying output frequency and providing internal braking components, the unit delivers closed-loop control that reduces mechanical strain and matches motor performance to real-time load demands in industrial environments.

The unit has an IP20 protection rating, indicating that its touch-safe terminals are suitable for cabinet installation. A supply range of 305 to 500 V across a three-phase line in the 400 V class supports a wide range of utility feeds, while the nominal input requirement of 18.1 A supports appropriate fuse and cable selection. Internally, the inverter can deliver 11 kVA of apparent power and sustain a motor shaft output of up to 7.5 kW. Continuous armature current is 16.5 A and matches the specified stall current at the 8 kHz carrier frequency. This switching rate balances acoustic noise with dynamic response. The recommended line conductor cross section is 4 mm². Ambient operation is permitted from -10 °C to 45 °C with up to 95% noncondensing humidity, allowing use in most production facilities.

Dynamic stopping energy is managed by the integrated filter and braking transistor, which direct deceleration power to an external resistor. With a peak brake current of 15 A and a minimum resistor value of 50 Ω, the dissipation element can be sized for the connected load and its inertia. Thermal management relies on a heat sink temperature limit of 73 °C and a calculated power loss of 240 W, so forced ventilation may be necessary in densely packed enclosures. The drive accepts a 25 A mains fuse, uses Compact control mode, and provides a Standard fieldbus interface for basic remote commands. Its E-size housing maintains moderate overall depth while accommodating the power stage.