33.Z2.F04-1003 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 33.Z2.F04-1003 is part of the Z2 Three Phase Motor Chokes series and has a rated current of 800 Amps at 400 VAC. This choke features an impedance of 20 percent, an inductance of 0.015 mH, and supports a maximum output frequency of 1600 Hz. The unit has a conductor cross-section of 300 mm² and a total mass of 135 kilograms.
Internal Product Review
The 33.Z2.F04-1003 is a KEB Z2 three-phase motor choke rated for 800 A at 400 VAC. A 20% impedance rating and 1600 Hz maximum output frequency support effective harmonic mitigation and stable drive operation. Integrated temperature switch protection makes this choke a strong high-current option for demanding motor systems.
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Product Description:
The 33.Z2.F04-1003 is a three-phase motor choke manufactured by KEB within the Z2 Three Phase Motor Chokes series. Installed between a frequency inverter and an induction motor, the device introduces controlled impedance that limits peak currents and reduces voltage rise time, helping protect winding insulation and reduce harmonic distortion. Built for three-phase networks in automated conveyor lines, presses, and test rigs, it serves as a passive inductive element that improves current symmetry and extends equipment service life in electrically noisy environments.
The choke is rated for a line voltage of 400 VAC, so its insulation and clearances suit typical low-voltage distribution systems found in manufacturing plants. The design also tolerates surges up to 550 V without electrical breakdown. An admissible RMS load of 800 A indicates the maximum continuous current that the copper windings can carry without exceeding their temperature class. The laminated structure provides an inductance of 0.015 mH, producing reactance that opposes high-frequency components while adding minimal voltage drop at the fundamental frequency. A relative impedance of 20% indicates the voltage drop across the choke at full-load current. To accommodate fast-switching vector drives, the unit maintains linear behavior at terminal frequencies up to 1600 Hz.
Rectangular bus bars accept conductors with a cross-sectional area of 300 mm², providing ample surface area for high current while limiting resistive losses. The assembly has a mass of 135.0 kg, including 40 kg of copper used in its windings. Continuous operation produces 949 W of heat, and an integrated temperature switch can signal the drive to stop or activate an external cooling system when the preset temperature limit is reached. Installation requires space for a width of 500 mm, a core depth of 350 mm, and a coil height of 400 mm. The overall mounted height is 455 mm beneath the terminal covers, so the enclosure must provide sufficient vertical clearance for the choke and its electrical connections.
