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Test chokes

Test chokes

Inductive loads - the individual components

Inductive loads are usually specially designed for an application and with reference to the applicable norms.

Inductive load units are used when power supply systems or other test specimens, such as switches, contacts or frequency converters have to be loaded with a standardized effective and reactive power.

  • 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 Category: 25/085/21 DIN IEC 68 Part 1
    • Max. winding temperature: 140 °C
    • Protection rating: IP 00


  • 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 during switch on and switch off procedures. The parameters must be the same, every time, during these 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 at 40° C Environment
    • Climatic category: 25/085/21 DIN IEC 68 Part 1
    • Max. winding temperature: 140° C
    • Cooling: AF
    • Protection Rating: IP 00


  • 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 
    • Climatic category: 25/085/21 DIN IEC 68 Part 1
    • Max. winding temperature: 125° C
    • Protection Rating: IP00


  • 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 
    • Climatic Category: 25/085/21 DIN IEC 68 Part 1
    • Max. winding temperature: 125° C
    • Protection Rating: IP00


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