DC-Link chokes

DC-Link chokes

REDUCE HARMONICS IN THE DC

A DC reactor relieves the supply network by compensating the harmonics reactive power.

Similar to a line choke, the DC-link choke acts as a passive component and helps to reduce harmonics and relieve the supply network.

The DC choke attenuates also the peak load current of the DC link capacitors.

 These chokes are used in frequency inverters in drive engineering applications and also in the general kind of DC power supplies.

  • CNW 891

    Single-phase DC-link choke (1 lines)

    CNW 891
    • Nominal Voltage: 600 V
    • Rated current: 8 - 100 A
    • Inductance: 0,67 - 9,4 mH

    Power Noise Reduction - save energy costs. 


    The DC-link choke is used for smoothing the DC link current and to reduce mains harmonics in voltage source inverters.


    The typical combinations of rectifiers and capacitors strains the supply network significantly. For functional reasons, the current consumption of the power supply or the inverter is not sinusoidal but pulsed at the moment of maximum voltage. DC-link chokes reduce the harmonics and relieve the supply network similar to the mains choke. In addition, the DC-link choke attenuates charging current peakssurges of the DC-link capacitors. By using a DC-link choke the supply network is less burdened with harmonic reactive power.


    Improvement of the efficiency of a converter (Power Factor Correction). Starting currents and current peak are attenuated up to 70%. Mains chokes help to comply with international power quality standards IEEE 519 or EN 61000-3-2.



    • Rated voltage: U ≤ 600 V

    • According to: EN 60289 / EN 61558

    • Test voltage: L-PE 4000 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

    • 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 892

    DC-link chokes (2 lines)

    CNW 892
    • Nominal Voltage: 800 V
    • Rated current: 8 - 100 A
    • Inductance: 0,67 - 9,4 mH

    Power Noise Reduction - save energy costs. 


    The DC-link choke is used for smoothing the DC link current and to reduce mains harmonics in voltage source inverters.


    The typical combinations of rectifiers and capacitors strains the supply network significantly. For functional reasons, the current consumption of the power supply or the inverter is not sinusoidal but pulsed at the moment of maximum voltage. DC-link chokes reduce the harmonics and relieve the supply network similar to the mains choke. In addition, the DC-link choke attenuates charging current peakssurges of the DC-link capacitors. By using a DC-link choke the supply network is less burdened with harmonic reactive power.


    Improvement of the efficiency of a converter (Power Factor Correction). Starting currents and current peak are attenuated up to 70%. Mains chokes help to comply with international power quality standards IEEE 519 or EN 61000-3-2.



    • Rated voltage: U ≤ 800 V

    • According to: EN 60289 / EN 61558

    • Test voltage: L-PE 4000 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

    • 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

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