High Voltage VLF AC DC Hipot Tester Very Low Frequency Cable Test Machine
Very Low Frequency (VLF) Test Device is an essential piece of equipment for testing high-voltage cables and power systems. VLF test devices operate at a frequency range of 0.1 Hz to 1 Hz, which generates an AC output waveform known as a sine wave.
Functional Description:
VLF test devices are designed to generate high-voltage electrical energy that is used to test the quality of insulators in cables, transformers, generators, and other high-voltage equipment. The device measures the current flow through the cable and identifies any faults or defects, such as insulation breakdown, discharges, and partial discharges.
Applications:
VLF test devices are widely used in industries such as power generation, transmission, and distribution, as well as in aerospace, railway applications. These devices are vital for ensuring the reliability and safety of power systems and equipment.
Parameters: The VLF test device has several parameters, including output voltage, current, and frequency. The output voltage ranges from 0 to 200 kV, and the current ranges from 100 mA to 10 A. The frequency range is generally between 0.01 Hz and 0.1 Hz.
Testing Standards:
There are several testing standards for VLF devices, such as IEC 60502-2, IEEE 400.2, VDE 0276-620, BS 7835, and others. These standards define the requirements and procedures for conducting tests on high-voltage cables and equipment using VLF test devices.
Operation:
To operate a VLF test device, it is connected to the equipment or cable to be tested, and the device is set to the desired output voltage and frequency. When the test is performed, the VLF device applies a high voltage to the cable or equipment, and the response is measured and analyzed to identify any issues.
Parameter:
| Model |
Rated Voltage/current |
Load Carrying
Capacity |
Power fuse wire |
| 30 |
30kV/20mA
(Peak) |
0.1Hz,≤0.5µF~1.1µF |
5A |
| 0.05Hz,≤0.5µF~2.2µF |
| 0.02Hz,≤0.5µF~5.5µF |
| 50 |
50kV/30mA
(Peak) |
0.1Hz,≤0.5µF~1.1µF |
7A |
| 0.05Hz,≤0.5µF~2.2µF |
| 0.02Hz,≤0.5µF~5.5µF |
| 60 |
60kV/30mA
(Peak) |
0.1Hz,≤0.5µF |
9A |
| 0.05Hz,≤0.5µF~1µF |
| 0.02Hz,≤0.5µF~2.5µF |
| 80 |
80kV/30mA
(Peak) |
0.1Hz,≤0.5µF |
12A |
| 0.05Hz,≤0.5µF~1µF |
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