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VLF-60 High Voltage Cable Tester
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The VLF-60 Cable Insulation Tester is a very low frequency high-potential test system designed for efficient insulation testing and fault detection in medium-voltage cables.
VLF testing applies frequencies between 0.01Hz and 0.1Hz, allowing effective fault detection without damaging cable insulation. Compared to traditional DC testing, VLF testing is non-destructive while still capable of identifying insulation weaknesses and cable defects.
Key Features
• Efficient non-destructive cable withstand testing
• Portable design for field use
• Fully automatic testing cycle
• Automatic cable discharging after test
• Load recognition and breakdown voltage measurement
• Solid insulation system for reduced maintenance
• Integrated touchscreen control interface
• Built-in software – no external PC required
Applications
• Medium voltage cable insulation testing
• Cable fault detection
• Cable commissioning tests
• Cable sheath testing
• Preventive maintenance testing
Technical Specifications
Output Voltage
Sinusoidal
0 – 62 kV peak / 0 – 44 kV RMS
DC Output
±0 – 60 kV
Squarewave Output
0 – 60 kV
Accuracy
±1%
Resolution
0.1 kV
Output Current
Sinusoidal (RMS)
26 mA
DC / Squarewave
40 mA
Accuracy
±1%
Resolution
1 µA
Output Frequency
0.01 – 0.1 Hz
Automatic frequency selection
Default frequency 0.1 Hz
Load Capacity
1 µF @ 0.1 Hz @ 44 kV RMS
5 µF @ 0.01 Hz @ 44 kV RMS
Maximum capacitance 10 µF
Output Modes
• VLF AC sinewave
• VLF AC squarewave
• DC positive / negative polarity
• Vacuum bottle test mode
• Cable jacket / sheath testing
• Sheath fault location
• Breakdown mode
Measurement Functions
Voltage and Current
True RMS / peak measurement
Capacitance Range
0.1 nF – 20 µF
Resistance Range
0.1 MΩ – 20 GΩ
Waveform Display
Real-time oscilloscope output
System Specifications
Display
5.7" colour touchscreen TFT
Input Voltage
110 – 240 V AC
Power Consumption
1.2 kVA
Dimensions
530 × 580 × 410 mm
Weight
60 kg