50KV AC High Voltage Very Low Frequency Tester

50KV AC High Voltage Very Low Frequency Tester

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Very Low Frequency High Voltage Tester (VLF-50KV)

VLF (Very Low Frequency) Testers are suitable for testing power cables, transformers, switch gear, rotating machinery and other electrical apparatus.


  • Input: 220 ± 10% Volts AC, 50/60 Hz, single phase.
  • Output-Voltage: 60KV.
  • Output frequency: 0.1Hz, 0.05Hz, 0.02Hz.
  • Stability of frequency: Fluctuation < 0.5%
  • Measurement accuracy: ± 3%.
  • Positive and negative voltage peak errors: 3%.
  • Voltage waveform distortion: 5%
  • Construction: In two units: Controller and Booster.
  • Ambient conditions of use: Temperature Indoor and outdoor: -10 to + 50 ºC
  • Humidity: 85%

The third generation of advantages:

  • Waveform without distortion: Standard sine wave output.
  • Strong load capacity: load capacitance to meet the rated capacity(0.1Hz 1.1uF, 0.05Hz 2.2uF, 0.02Hz 5.5uF).
  • Little impact pulse current: Cycloconverter pulse current generated little impact on the grid.
  • Strong EMI immunity: During the test controller is stable and reliable.
  • Simple operation: Capacitive screen operation, simple and convenient.

Performance Characteristics:

  • Advanced inverter technology: Digital AC-AC inverter technology, advanced software closed-loop control, precise standard output without distortion sine wave, fully automated testing process.
  • Display: The 7 'capacitive touch screen, the screen displays real-time measurement data and the output waveform.
  • Comprehensive protection: high, low pressure side of the over voltage and over-current protection, rapid response action (action time 10ms).
  • Simple operation: simple wiring, fool type operation.
  • Safe and reliable: the controller and the high voltage generator connected to the low pressure, photoelectric control, safety and reliability.
  • The high and low voltage closed-loop negative feedback control circuit, the output can not rise effect.
  • Test range: 0.1 Hz, 0.05Hz and 0.02Hz multi frequency selection, large measuring range.
  • Printer: print the test results.
  • Small size, light weight: very conducive to outdoor work.
  • Communication interface: USB2.0.
  • Software: Equipped with specialized SVLF ultra low frequency high-voltage generator software, can be tested by software, and the data query and print statements.

Technical Specification:

Model Output Peak voltage Measuring range Weight Applications
SVLF-30 30KV 0.1H-1.1µF Controller: 4 kg
Booster: 25 kg
10KV and below voltage cables,generator
SVLF-40 40KV 0.1H - 1.1 µF Controller: 4 kg
Booster: 45 kg
13.8KV and below voltage cables,generator
0.05H- 2.2 µF
0.02H - 5.5 µF
SVLF-50 50KV 0.1H -1.1 µF Controller: 4 kg
Booster: 45 kg
15KV and below voltage cables, generator
0.05H -2.2 µF
0.02H -5.5 µF
SVLF-60 60KV 0.1H -1.1 µF Controller: 4 kg
First Booster:25 kg
Second Booster:45 kg
20KV and below voltage cables, generator
0.05H- 2.2 µF
0.02H -5.5 µF
SVLF- 80 80KV 0.1H 1.1 µF Controller: 4 kg
First Booster:25 kg
Second Booster:45 kg
35KV and below voltage cables, generator
0.05H -2.2 µF
0.02H -5.5 µF