25.Z2.F04-1003 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 25.Z2.F04-1003 is a three-phase motor choke from the Z2 Three Phase Motor Chokes series with a rated current of 210 Amps and a rated voltage of 400 VAC. It features a conductor cross-section of 70 mm², has a mass of 35 kilograms, and operates at a maximum voltage of 550 V. The choke supports a maximum output frequency of 1600 Hz and a switching frequency range between 5 kHz and 16 kHz.
Internal Product Review
The 25.Z2.F04-1003 is a KEB three-phase motor choke sized for demanding drive systems, with a 210 A rated current and 400 VAC rated voltage. A 5 to 16 kHz switching-frequency range and an integrated temperature switch support stable filtering and dependable thermal supervision. A strong choice for high-performance motor output conditioning, especially where clean operation and reliable protection are priorities.
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Product Description:
The 25.Z2.F04-1003 three-phase motor choke is produced by KEB for the Z2 Three Phase Motor Chokes series. Installed on the output side of a frequency converter, this passive component increases circuit inductance to moderate voltage rise times and reduce stress on motor insulation. It is intended for three-phase networks in industrial automation where high switching frequencies can otherwise create excessive common-mode currents and premature bearing wear. The choke is sized for cabinet installation alongside medium-power drives.
The choke operates at a nominal line voltage of 400 VAC and can continuously carry up to 210 A. Its core and winding set provide an inductance of 0.058 mH, which attenuates voltage rise peaks while allowing normal motor flux buildup. Each phase is routed through a copper bar with a cross-sectional area of 70 mm², minimizing resistive losses. Acceptable carrier frequencies extend from 5 kHz to a maximum of 16 kHz; above that point, iron losses and differential impedance fall outside the intended operating range. The assembly dissipates 430 W under rated excitation, so forced-air cooling is typically provided. Its insulation tolerates momentary excursions up to 550 V. An integrated temperature switch opens a control contact before the windings reach critical temperatures.
The choke remains linear up to an output frequency of 1600 Hz, allowing permanent-magnet or spindle motors to operate far above the mains frequency. For short events lasting up to 60 seconds, it accommodates current at 125 percent of the nominal value, providing additional capacity during acceleration without saturating the magnetic path. A short-circuit voltage of 20 percent helps limit fault current until protective devices respond. The windings contain approximately 11 kg of copper and contribute to the total assembly mass of 35 kg. These weight values should be considered when selecting mounting hardware and calculating the load placed on the cabinet structure.
