Very Low Frequency

Very Low Frequency

VLF is an advanced voltage tester that uses digital technology to ensure precise and safe testing on high capacitance loads such as high voltage cables, large motors, and generators. With direct sampling of current, voltage, and waveform data from the high voltage side, it provides increased accuracy and features overvoltage protection for quick interruption. Operated by a control console and booster circuit, VLF generates high voltages at low frequencies, keeping the injected power into capacitive loads low. With the capability to test multiple phases simultaneously and flexible adjustment of test time, it is the ideal choice for low-frequency insulation resistance and withstand voltage testing. Key words: Applied voltage on cables, hipot, frequency variation, VLF (very low frequency). Standards: IEC 60502-2, CENELEC HD 620 and 621, DIN VDE 0276-620 and 621, IEEE Std. 400

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Very Low Frequency

Technical Information

Power supply
220 VAC ± 5% / 50 Hz ou 60 Hz
Output voltage
Up to 50 kV peak
Output frequency
0,1 Hz; 0,05 Hz; 0,02 Hz
Charge capacity
0,1 Hz max 1,1 μF; 0,05 Hz max 2,2 μF; 0,02 Hz max 5,5 μF
Measurement accuracy
3%
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Technology for precise testing

The VLF combines advanced digital frequency conversion technology, using microcomputer control, complete automation for increase, decrease, measurement, and protection. Developed to perform applied voltage tests on high capacitance loads, such as shielded high-voltage cables, large motors, or generators.

Technology for precise testing
Benefits and Usability

Benefits and Usability

  • Efficient protection
    Efficient protection

    Operational safety with swift response in risky situations

  • Accurate measurement
    Accurate measurement

    Current, voltage, and waveform measurements are sampled directly from the high-voltage side, ensuring greater accuracy

  • Operational flexibility
    Operational flexibility

    Adapts to different testing needs according to the test requirements

Exclusive Features

The VLF offers increased accuracy, effective protection, sophisticated control, and exceptional versatility in voltage testing. Its high-tech operation provides reliable and effective results

  • ImageIncreased accuracy
  • ImageEffective protection
  • ImageSophisticated control
  • ImageAdvanced technology

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