Product Description:

The 14.F4.S1E-4A01 is an AC frequency inverter manufactured by KEB and assigned to the F4 Combivert Frequency Inverters series. It is built to receive fixed-frequency three-phase power and deliver a pulse-width-modulated output that lets automated machinery vary motor speed and torque as process conditions change. Used inside control panels, the unit supports external braking resistors and provides the interface points needed for safe energy dissipation during deceleration. This operating method allows smooth acceleration, controlled stopping, and stable motor operation when load demand changes during the machine cycle.

This inverter draws a nominal input of 18.1 A from a three-phase supply that requires 25 A fuse protection and 4 mm² conductors. At the output, it can deliver 11 kVA, which supports motors rated up to 7.5 kW in normal service. Pulse generation uses an 8 kHz nominal carrier frequency, and the setting can be increased to 16 kHz when reduced audible motor noise is preferred. Under full load, the electronics dissipate 240 W of heat, so enclosure airflow and panel spacing must be planned accordingly. The drive can also maintain its rated output current at standstill without immediate thermal overload, which is useful in applications that need controlled holding torque for short periods.

The protective housing is classified as IP20, so the unit is intended for installation in a closed cabinet where live parts remain finger-safe. Dynamic braking uses an internal transistor that accepts external resistors down to 50 Ω and can route up to 15 A of braking current during rapid stops. Control terminals are tightened to 0.5 Nm, helping maintain reliable electrical contact on command and signal wiring. This braking arrangement gives the inverter a direct way to handle regenerated energy from decelerating loads without relying on a separate braking module.