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DV/Dt - Chokes/Filter

DV/Dt - Chokes/Filter

Cost-effective solution for minimizing the dv / dt rise

REO dv/dt chokes and filters attenuate due to their structure the voltage rise to acceptable values ​​.

For short cable lengths between inverter and motor a dv/dt choke limits the increase speed to less than 1000 V/μs, which is sufficient for most motors and standards.

  • CNW 806

    Three-phase-dv/dt filter

    CNW 806
    • Nominal Voltage: 500 V
    • Rated current: 4 - 1200 A
    • Inductance: 0.005 - 1.5 mH

    Reduce voltage rise to < 500V/µs - electrical consumers and insulation will 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 reduced. By limiting the rate of voltage rise, the motor insulation is protected and, therefore, its life is prolonged.

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

    • 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 2,500 V, AC/50Hz 60s; L-PE 2,500 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


    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


  • CNW 811

    Three-phase dv/dt filter

    CNW 811
    • Nominal Voltage: 500 V
    • Rated current: 6 - 100 A
    • Inductance: 0.7 - 7.5 mH

    Output filter used with fast switching semiconductors, for reducing harmonics.  Reduction of leakage currents. Additional suppression of interference, especially in IT networks. The ideal link between frequency drive and motor.

    • Conforming to: VDE 0565-3 / IEC 950 / UL 1283
    • Test voltage: L-L 2,100 V,DC 1min, L-PE 2,700 V,DC 1min
    • Overload: 1.5 x I 1 min/h
    • Climatic category: DIN IEC 68 Part 1 25/085/21
    • Rated voltage: 3 x 500 VAC


  • CNW M 833

    Fully encapsulated three-phase dv/dt Filter (IP20)

    CNW M 833
    • Nominal Voltage: 400 V
    • Rated current: 8 - 175 A
    • Inductance: 0.09 - 2 mH

    Reduce voltage rise to < 500V/µs - electrical consumers and insulation will protected with low costs. 

    A simple and inexpensive method for reducing the rate of voltage rise is to use a du / dt filter. The filter attenuates the voltage rise to acceptable values and prevents overvoltage on long supply lines. Losses and heating are minimized and reduces the leakage current. By limiting the rate of voltage rise, the motor insulation is protected and thus increases the service life.

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

    Voltage risers is reduced to < 500V/µs.

    • Rated voltage: U ≤ 3 x 400 V
    • Reduce the voltage rise dv / dt to < 500V/µs
    • Max. cable length to the motor: 200 m
    • Field frequency: 10 - 60 Hz
    • Short circuit voltage at 400 V: 0.8%
    • Drive switching frequency: 4 kHz > ft < 8 kHz
    • According to: EN 60289 / EN 61558
    • Test voltage: L-L 2,500 V, AC/50Hz 60s; L-PE 2,500 V, AC/50Hz 60s
    • Insulation class: T40/F
    • Protection rating: IP20
    • Climatic Category: DIN IEC 60068-1
    • Overload: 1.5 x INenn 1 min / h
    • Ambient temperature: 40 °C
    • Design: standing on foot angle

     

    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
  • CNW M 833

    Fully encapsulated three-phase dv/dt Filter (IP54)

    CNW M 833
    • Nominal Voltage: 400 V
    • Rated current: 8 - 175 A
    • Inductance: 0.09 - 2 mH

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

    The dv / dt filters in fully encapsulated version are specially designed for rough environments and offer a very good mechanical protection of the component. The full encapsulation allows design up to protection ratings IP 66.

    The filter attenuates the voltage rise to acceptable values and prevents overvoltage on long supply lines. Losses and heating are minimized and reduces the leakage current. By limiting the rate of voltage rise, the motor insulation is protected and thus increases the service life.

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

    Voltage risers is reduced to < 500V/µs.

    • Rated voltage: U ≤ 3 x 400 V
    • Reduce the voltage rise dv / dt to < 500V/µs
    • Max. cable length to the motor: 200 m
    • Field frequency: 10 - 60 Hz
    • Short circuit voltage at 400 V: 0.8%
    • Drive switching frequency: 4 kHz > ft < 8 kHz
    • According to: EN 60289 / EN 61558
    • Test voltage: L-L 2,500 V, AC/50Hz 60s; L-PE 2,500 V, AC/50Hz 60s
    • Insulation class: T40/F
    • Protection rating: IP20
    • Climatic Category: DIN IEC 60068-1
    • Overload: 1.5 x INnomin 1 min / h
    • Ambient temperature: 40 °C
    • Design: standing on foot angle

     

    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
  • CNW 855

    Three-phase dv/dt filter

    CNW 855
    • Nominal Voltage: 480 V
    • Rated current: 7 - 180 A

    Frequency converters for motor drives, wind power installations, and power supply units.

    • Conforming to: VDE 0565-3 / IEC 950 / UL 1283
    • Test voltage: L-L 2,100 V, DC 1min; L-PE 2,700 V, DC 1min
    • Overload: 1.5 x INenn 1 min / h
    • Climate Category: DIN IEC 68 Part 1 25/085/21
    • Frequency: 50/60 Hz


Downloads

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    REO achieve highest IP protection ratings

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    Operating instructions
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    Operating instructions

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