15.F4.C1H-3280 KEB
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The KEB 15.F4.C1H-3280 is part of the F4 Combivert Frequency Inverters series and has a maximum rated motor power of 11 kW with an output nominal power of 17 kVA. This inverter features an integrated braking transistor, 3-phase input, and offers 4 programmable digital inputs and 2 relay outputs. It weighs 14 kg and supports a switching frequency of 16 kHz with a rated mains voltage of 230 V.
Internal Product Review
The 15.F4.C1H-3280 is a KEB F4 Combivert frequency inverter designed for 230 V mains and 3-phase input service. Integrated braking transistor support and 29 A maximum braking current make the unit especially effective in demanding deceleration applications. A 48 A nominal output current gives the inverter impressive drive authority.
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Product Description:
The 15.F4.C1H-3280 is a frequency inverter produced by KEB within the F4 Combivert Frequency Inverters series. It is intended for three-phase AC motor installations where variable speed control, controlled acceleration, and regenerative braking are required. By modulating the output voltage and frequency, the unit allows an automation system to match motor torque to process demand while its integrated braking circuitry manages surplus energy during deceleration.
The inverter connects to a three-phase supply rated at 230 V and can deliver up to 17 kVA of apparent power to the motor terminals. Under continuous operation, the output current is held at 48 A, while carrier pulses are switched at 16 kHz to minimize audible noise and improve current waveform quality. At rated conditions, it supports motors up to 11 kW. Four programmable digital inputs accept run, jog, or limit signals from a PLC, and two programmable relay outputs return status or fault information to supervisory circuits. An integrated braking transistor works with an external resistor; the typical resistor value is 16 Ω, and a minimum of 13 Ω is used when lower thermal loading is needed. Peak braking current is limited to 29 A to protect the resistor network.
Transient events are handled by protective thresholds. A heat-sink sensor trips the drive if temperature rises to 90 °C. Mechanical overloads can be absorbed briefly because the inverter tolerates a short-time output of 72 A, yet an overcurrent shutdown occurs at 88 A to protect the IGBT stage. The design weight is 14 kg, allowing cabinet mounting without heavy-duty supports. Two relay contacts can be configured to indicate when braking energy has been dissipated or when the DC link is at a safe voltage, and the drive logic can command the external resistor through these same contacts for coordinated braking sequences.
