18.DR.B18-4941 KEB
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The KEB 18.DR.B18-4941 is part of the DR Motor Input Chokes series and is designed for 3-phase operation with a rated voltage of 400 V and rated current of 60 A. This choke features an inductance of 0.48 mH, a frequency range of 45-65 Hz, and supports a conductor cross-section of 10 mm². It weighs 10 kilograms and has dimensions of 219 x 110 x 200 mm.
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Product Description:
The 18.DR.B18-4941 input choke is manufactured by KEB for the DR Motor Input Chokes series. As a line reactor placed between the mains supply and an inverter, it limits current peaks and dampens voltage transients, reducing harmonic distortion and protecting drive components in automated machinery. By increasing impedance at the converter input, the choke also attenuates commutation notches and improves the power factor of connected drives. This filtering action reduces electrical stress on the inverter’s rectifier and DC bus components during normal operation.
The choke operates on a three-phase network rated at 400 V and can carry a continuous line current of 60 A without saturation. Its core windings provide an inductance of 0.48 mH, which moderates the rate of current change seen by the inverter’s input capacitors. A compatible grid frequency range of 45 to 65 Hz supports operation with common industrial power supplies. Each phase conductor experiences equal impedance, helping maintain phase balance during operation. The enclosure measures 219 × 110 × 200 mm, providing a compact footprint for cabinet mounting. At the nominal mains frequency, the choke provides enough reactance to limit line-side ripple current and reduce conducted electrical interference in panels containing multiple drives.
Continuous operation produces a thermal load of 100 W, so the enclosure should provide adequate airflow or a suitable heat-dissipating mounting surface. The terminal blocks accept cables with a cross-sectional area of up to 10 mm², accommodating conductors appropriate for the choke’s current capacity. With a mass of 10 kg, the unit requires a secure mounting surface that can support its weight during machine operation and vibration. Two slotted mounting holes measuring 7 × 12 mm align with fixed mounting centers of 201 × 84 mm. This arrangement allows the choke to be fastened directly to a cabinet back panel or base frame without additional mounting brackets.
