Test chokes

Test chokes

Induktive Lasten - die individuellen Komponenten

Induktive Lasten sind in der Regel Komponenten, die speziell auf die Anwendung ausgelegt werden.

Der Grund hierfür liegt in den dafür geltenden Normen, welche nicht nur die Prüfungen, sondern auch die Prüfaufbauten und -abläufe beschreiben. Die Induktivitäten sind speziell auf den Anwendungsbereich angepasst, so dass keine überdimensionierten Bauteile eingesetzt werden. Induktive Lasteinheiten werden verwendet, wenn Stromversorgungen oder sonstige Prüflinge, wie z.B. Schalter, Kontakte, Frequenzumrichter mit einer genormten Wirk- und Blindleistung belastet werden müssen.

  • NPT 8919

    Single-phase iron core choke

    NPT 8919
    • Nominal Voltage: 230 - 600 V
    • Rated current: 1,5 - 32,5 A
    • Inductance: 0,031 - 71 mH

    These chokes are used in test laboratories as load chokes. They can be interconnected with each other. If these chokes used with appropriate resistors, a test under different cos (phi) is possible. 



    • Insulation class: F at 40° C 

    • Climaatic categorie: 25/085/21 DIN IEC 68 Part 1

    • Max. winding temperature: 125° C

    • Protaction rating: IP00



  • NPT 892

    Single-phase DC test choke

    NPT892
    • Nominal Voltage: 24 V
    • Rated current: 0,2 - 4 A
    • Inductance: 160 - 125000 mH

    Switches must be pass many different tests during the approval phase. Some of these tests involve the switching behavior under different load conditions, the switch is tested on nominal load, overload and at many cos?. Additionally the switch will be checked on switch on and switch off procedures. The paramters must be everytime the same during this tests.


    In the past, air chokes were used as inductive loads, since these do not saturate. Air chokes are larger and have a stronger leakage field than comparable core chokes with corresponding magnetic energy.



    • Insulation class: F bei 40° C Umgebung

    • Climatic categorie: 25/085/21 DIN IEC 68 Teil 1

    • Max. winding temperature: 140° C

    • Cooling: AF

    • Protaction rating: IP 00



  • NPT 8929

    Single-phase test choke

    NPT 8919
    • Nominal Voltage: 230 V
    • Rated current: 0,5 - 32,5 A
    • Inductance: 0,127 - 3180 mH

    These chokes are used in test laboratories as load chokes. They can be interconnected with each other. If these chokes used with appropriate resistors, a test under different cos (phi) is possible. 



    • Insulation class: F at 40° C 

    • Climaatic categorie: 25/085/21 DIN IEC 68 Part 1

    • Max. winding temperature: 125° C

    • Protaction rating: IP00



  • RPD 9039

    Three-phase load choke

    RPD9039
    • Nominal Voltage: 400 V
    • Rated current: 0,6 - 75 A
    • Inductance: 3,15 - 254 mH

    Drive inverters or output filters must be tested at rated current by using typically motor-generators. Due to the high costs, the specimens can be loaded alternatively with chokes which have a sufficient linearity and does not exceed the temperature limit at higher frequencies.



    • Cooling: AN

    • Isolierstoffklasse: F

    • Climatic categorie: 25/085/21 DIN IEC 68 Teil 1

    • Max. winding temperature: 140 °C

    • Protection rating: IP 00



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    Test technology catalogue
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    Test technology catalogue

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    Components for wind power generation Catalouge

    REO components for wind power generation Safe application for onshore and offshore installations
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    Chokes overview

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    REO chokes with high protection ratings
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    REO chokes with high protection ratings

    REO chokes with high protection ratings Fully encapsulated REO chokes
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