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Introduction to the KEP VLF-60 HiPot Cable Tester:
One of the most popular cable testing techniques nowadays is very low frequency testing, which, on the one hand, provides accurate testing results, and, on the other hand, does not damage good cable insulation.
Very low frequency (VLF) testing involves applying frequency in the range of 0.01 to 0.1 Hz to the cable under test, which is non-destructive to insulation of proper quality, but is enough to detect cable faults. Compared to DC cable testing, which can be damaging to good insulation, VLF testing does not have such a detrimental effect on the cable being tested and does not generate any travelling waves.
Very low frequency (VLF) testing involves applying frequency in the range of 0.01 to 0.1 Hz to the cable under test, which is non-destructive to insulation of proper quality, but is enough to detect cable faults. Compared to DC cable testing, which can be damaging to good insulation, VLF testing does not have such a detrimental effect on the cable being tested.
KEP VLF-60 HiPot Cable Tester – MAIN FEATURES:
- Efficient non-destructive cable withstand testing
- Portable, perfect for field testing
- Test capacity of 10 µf
- Fully automatic testing cycle
- Automatic discharging
- Easy maintenance due to solid-type insulation system
- Breakdown voltage measurement and load recognition
- Easy-to-use software
- Does not need an external PC
- LCD touchscreen
KEP VLF-60 HiPot Cable Tester – Technical Specifications:
| Parameter | Value |
| Output Voltage: | |
| – Sinusoidal | 0 – 62 kV peak / 0 – 44 kV RMS |
| – DC | ± 0 – 60 kV |
| – Squarewave | 0 – 60 kV |
| – Accuracy | ± 1 % |
| – Resolution | 0.1 kV |
| Output Curent: | |
| – Sinusoidal (RMS) | 26 mA |
| – DC / Squarewave | 40 mA |
| – Accuracy | ± 1 % |
| – Resolution | 1 μA |
| Output Frequency | 0.01 – 0.1Hz in steps of 0.01 Hz (default 0.1 Hz) – auto frequency selection |
| Output Load | 1 μF @ 0.1 Hz @ 44 kV RMS 5.0 μF @ 0.01 @ 44 kV RMS 10.0 μF max capacitance (at lower frequency and Voltage) |
| Output Modes | |
| – VLF AC Sinewave | yes |
| – VLF AC Squarewave | yes |
| – DC (positive or negative polarity) | yes |
| – Vacuum Bottle Test Mode (DC) | yes |
| – Cable Jacket / Sheath Testing | yes |
| – Sheath Fault Location | yes |
| Breakdown Mode | |
| – Fault Condition Mode | yes |
| – Fault Trip Mode | yes |
| Metering | |
| – Voltage and Current | True RMS and / or peak |
| – Capacitance | 0.1 nF to 20 μF Range |
| – Resistance | 0.1 MΩ to 20 GΩ |
| – Waveform | Real time oscilloscope display of actual output voltage waveform |
| Safety | 50 / 60 Hz – 12 kV Feedback Protection / Dual Discharge Device (internal) |
| Duty Cycle | Continuous |
| Computer Interfaces | USB, RS-485 |
| Display | Color touchscreen TFT 5.7 “ (115 × 86 mm) |
| Input Voltage | (110 to 240) V AC ±10 %, 50 / 60 Hz |
| Consumption Power | 1.2 kVA |
| Dimensions (H × W × D) | 530 × 580 × 410 mm |
| Weight | 60 kg |
The KEP VLF-60 HiPot Cable Tester is designed for an indoors operation under the following conditions:
| Condition | Value |
| Air temperature, °С | from -10 to +40 |
| Relative humidity, %, up to | 85 at +25 °С |
| Atmospheric pressure, kPa (mm hg) | 84,0 – 106,7 (630 – 800) |
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