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VLF Cable Tester

High Voltage Cable Testing Equipment
Cable Testing Equipment
VLF Testing Equipment

Product Description


The 0.1Hz ultra-low frequency technology is the latest technology and is the technology recommended by IEC (International Electrotechnical Commission) at present. The new generation of VLFS series microcomputer type 0.1 Hz ultra-low frequency high-voltage generators are core products independently developed by FARSEE,they overcome many shortcomings of mechanical domestic products, and its cost performance is much higher than the similar imported products. It is particularly suitable for the withstand voltage test of electrical equipment (e.g.: power cables, power capacitors, large- and medium-sized generators and motors, etc.) with large insulation equivalent capacitance.


  1. Advanced technology: By adopting digital frequency conversion technology and microcomputer control, the test procedures of boosting, voltage reduction, measurement, protection, etc. are fully automated. The instrument has the electronic calendar function, and the time can still be maintained after powering down.
  2. Convenient operation: Simple wiring, and fully automatic operation.
  3. Comprehensive protection: Multi-protection (over-voltage protection, over-current protection on high- and low-voltage side), rapid action (action time ≤ 20 ms), the instrument is safe and reliable.
  4. Safe and reliable: The controller and the high-voltage generator are in low-voltage connection and under photoelectric control, which are safe and reliable to use.
  5. By adopting high- and low-voltage closed-loop negative feedback control circuit, the output has no capacitive rise effect.
  6. Complete configuration: 8-inch industrial touch screen, manual storage, and manual printing.
  7. The instrument has the data communication function. It can be connected to a computer through a USB port for uploading test data to the compute


1. Output voltage
Model Peak Voltage Measuring Range Weight Purpose
30/1.1 30kV ≤1.1μF @ 0.1Hz Controller: 4kg
Booster: 25kg
Cables, generators with voltage of 10kV and below
≤2.2μF @ 0.05Hz
≤5.5μF @ 0.02Hz
50/1.1 50kV ≤1.5μF @ 0.1Hz Controller: 5kg
Booster: 35kg
Cables, generators with voltage of 20kV and below
≤3.0μF @ 0.05Hz
≤7.5μF @ 0.02Hz
80/1.1 80kV ≤1.1μF @ 0.1Hz Controller: 5kg
Booster: 45kg
Cables, generators with voltage of 35kV and below

2. Power supply: 220V±10%, 50±5%Hz
3. Output voltage precision:
Degree of instability for peak value of output high voltage: ≤5%
Degree of instability for frequency of output voltage: ≤3%
Distortion rate of output voltage waveform: <5%
4. Service environment: Temperature: -100C~+400C, humidity: ≤85%RH