Product Description:

The 19.F4.F1H-3440 is an AC frequency inverter manufactured by KEB as part of the F4 Combivert Frequency Inverters series. The device converts fixed three-phase utility power into variable-voltage, variable-frequency output so industrial motors can follow speed commands generated by PLCs or motion controllers. Within an automation cell, it regulates the operation of conveyor drives, centrifugal pumps, and material-processing spindles by continuously matching motor torque to changing load requirements. This capability supports controlled acceleration and deceleration while allowing connected equipment to operate across a broad speed range.

Motor performance is managed through field-oriented control, a vector algorithm that separates stator current into torque-producing and magnetizing components for a fast dynamic response. The input section accepts a line voltage range of 305–500 V in a three-phase configuration, while the output stage supplies up to 60 A of nominal current at a switching frequency of 8 kHz. This current rating corresponds to the unit’s 400 V voltage class and supports midsize industrial motors. The inverter permits continuous operation within an ambient temperature range of -10 to 45 °C; operation outside this range requires derating or additional cooling. An enclosure rating of IP20 provides protection against finger contact but does not provide protection against liquids. The drive must therefore be installed inside a control cabinet with adequate airflow and suitable protection from moisture. Relative humidity may reach 95% when condensation is prevented.

The power section supports machines requiring up to 30 kW of shaft power, corresponding to an apparent output of 42 kVA under full load. An integrated braking transistor provides an energy path during rapid deceleration, allowing dynamic stops without the need for an external braking chopper. A compatible braking resistor is required to dissipate the regenerated energy produced during these stopping cycles. The mechanical layout uses an H-size housing, providing space for power terminals, standard fieldbus option boards, and removable control terminals. Cabinet placement should maintain the required clearances around the housing to support cooling airflow and provide access to wiring connections. Motor leads should also be routed separately from sensitive control wiring to reduce electrical interference in the installation.