Motor choke N CNW 854

Three-phase motor choke

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Motor choke N CNW 854

Three-phase motor choke



The new series scores not only with a faster delivery time, but also with the conservation of resources and increased efficiency.

Voltage rise (<200V / us) and distortion reduce - protect electrical consumers optimally. In addition to the increase of voltages, there is a considerable amount of symmetric and asymmetric current distortions which are generated at the motor cable through the fast switching of the power semiconductors. These are becoming more pronounced with increasing cable length. These disturbances can affect the performance of the engine by loud noises, and in extreme cases, by overheating. Here, a motor choke remedy. The motor choke reduces the voltage rise and the voltage spikes between the conductors. Furthermore, the current is smoothed. Losses and heating are minimized and the leakage current reduced. Longer motor cable lengths are possible. By limiting the rate of voltage rise, the motor insulation is protected and thus prolongs the life. The motor choke also attenuates the conducted interference in lower frequency range very good. The losses and the typical noise in the motor plate can be reduced. Voltage rise (<200V / us) will be reduced. Increasing the service life of motors, reduction of edge steepness dv/dt to earth and between phases, reduce motor noise, current smoothing. [/av_textblock] [av_heading heading='


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  • Protection of electrical consumers
  • Limitation of the voltage increase
    to <200V / us
  • Extended service life of electrical consumers
  • Reduction of engine noise
  • Low leakage currents on the motor
  • Longer motor cables possible
  • Easy construction
  • Compact design
  • Production according to UL insulation system
  • E251513 possible

Typical applications

Drive systems for motor drives: Mechanical engineering,Elevators / escalators,Pipes,Conveyor technology,Ventilation and air conditioning,Robotics,Automation technology,Power supplies,Wind turbines

Technical specifications

  • Rated voltage: U ≤ 3 x 500 V
  • Reduce the voltage rise dv / dt to <200V / us Field
  • frequency: 0 – 60 Hz Drive switching frequency: up to 150 A >4kHz, from 150 A >1,5KHz
  • According to: EN 60289 / EN 61558
  • Test voltage: L-L 2500 V, AC/50Hz 60s; L-PE 2500 V, AC/50Hz 60s
  • Insulation class: T40/F
  • Protection rating: IP00
  • Climatic categorie: DIN IEC 60068-1
  • Overload: 1,5 x INenn 1 min / h
  • Ambient temperature: 40 °C
  • Design: standing on foot angle

Dimensions in mm

Reduce voltage rice to < 500V/µs...

Smoothing of the current and voltage...