Product Description:

The 07.F4.CBD-4A03/1.4 is manufactured by KEB as part of the F4 Combivert Frequency Inverters series. As a frequency inverter, it synthesizes a variable-frequency, variable-voltage output from the fixed utility supply so that connected three-phase induction motors can run at controlled speeds in automated conveyors, fans, and small process machines. The device follows a compact control concept and is supplied in the D housing design to fit densely populated control panels.

This drive is rated for an apparent power of 1.8 kVA, which is the combined real and reactive power the inverter can exchange with the mains at full load. During continuous operation, the nominal input current is 2.8 A, and the power section delivers a rated output current of 2.6 A to the motor; the sizing of upstream protection and cable gauges depends on these steady-state values. An internal pulse-width-modulated stage operates at a carrier frequency of 4 kHz, which sets the resolution used to synthesize motor voltage and influences acoustic noise and switching losses. Those switching losses, together with control electronics consumption, result in a power loss of 45 W, and that heat must be removed by airflow across the heat sink to keep semiconductor junctions within limits.

The motor-side capability tops out at 0.75 kW of mechanical shaft power, matching fractional-horsepower machines used in light material transport and auxiliary equipment. The maximum heat sink temperature is 85 °C; if this level is exceeded, the drive will shut down protectively. For fault clearing, the recommended upstream protection is a 10 A mains fuse, selected so normal inrush does not cause nuisance trips while short circuits are disconnected quickly. The short-time current limit reaches 4.6 A, giving the inverter headroom for brief acceleration or overload events without reaching its 5.7 A electronic trip threshold. A 1.5 mm² line cross-section is sufficient for both supply and motor leads under these current ratings.