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Dv/dt Choke N Cnw 806

Three-phase dv/dt filter


Reduce voltage rice to < 500V/µs – electrical consumers and insulation will be protected with low costs.

A simple and inexpensive method for reducing the rate of voltage rise is to use a du / dt filter or throttle. It dampens the voltage rise to acceptable values and prevents overvoltages on long supply lines.

Losses and heating are minimized and the leakage current is reduced. By limiting the rate of voltage rise, the motor insulation is protected and thus prolongs the life.

Also, the electromagnetic interference can be reduced in the radiation range of 1 MHz to 30 MHz.


  • Protection for electrical consumers
  • Limitation of the voltage rise on <500V / us
  • The extended service life of electrical consumers
  • Low leakage currents on the motor
  • Reduced losses
  • Easy construction
  • Compact design
  • Production according to UL insulation system E251513 is possible


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


  • Rated voltage: U ≤ 3 x 500 V
  • Reduce voltage rice to < 500V/µs 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 category: DIN IEC 60068-1
  • Overload: 1,5 x INenn 1 min / h
  • Ambient temperature: 40 °C
  • Design: standing on foot angle



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