Product Description:

The 19.Z2.F04-1003 is a three-phase motor choke produced by KEB for the Z2 Three Phase Motor Chokes series. Installed between a pulse-width-modulated inverter and an AC motor, the choke inserts series inductance that limits current peaks, moderates voltage rise time, and reduces conducted noise. These functions protect motor insulation, decrease electromagnetic interference, and improve drive reliability within automated production lines, conveyors, and process equipment.

Designed for a mains voltage of 400 VAC, the unit carries a continuous load of 60 A without magnetic saturation. Its core and windings provide an inductance of 0.153 mH, producing an impedance of 20% relative to the system’s base impedance. This impedance attenuates harmonic currents while keeping the line voltage usable. The dielectric capability extends to 550 V, accommodating overvoltage conditions generated by regenerative braking. Thermal stability is aided by 3.5 kg of copper mass. Power conductors terminate on RK 35/35 blocks that must be tightened to 5 N·m to maintain low-resistance joints.

The choke supports converters that switch at frequencies up to 16 kHz and remains effective at frequencies as low as 5 kHz, providing flexibility when selecting carrier frequencies. It sustains motor output frequencies as high as 1600 Hz, permitting use with high-speed spindles while maintaining an output-to-switching ratio of 1:10. Core loss reaches 124 W at 800 Hz, a value that should be considered when sizing cabinet ventilation. Because the choke does not include an embedded temperature switch, external temperature sensing should be used where ambient temperature limits are narrow. Adequate spacing around the core and terminals allows heat to move into the surrounding cabinet air. The specified terminal torque also helps prevent localized heating at the conductor connections during continuous operation.