- Description
Test the condition of the cables with VLF or DC slow voltage
The S-24 VLF high voltage insulation tester is a compact, robust and portable kit for testing medium voltage cables according to IEEE400, IEC 60502-2, CENELEC HD 620 and 621 and DIN VDE 0276/620 and 621. The test is carried out using the low electrical stress method, with a VLF (Very Low Frequency) voltage of 0.1 Hz.
The VLF test is the fastest way to detect insulation damage. The S-24 VLF instrument can test cables with plastic insulation (XLPE, PE-, EPR) as well as paper and oil insulation (PILC). Testing with DC voltage is also possible.
Sonel offers online training course on the use of this product (instructional video and consultation with a specialist).
Features
- Extremely compact high-power VLF test device
- Easily portable for 1-2 people
- Simple operation: menu-assisted control with industrial class OLED display
- Fully automatic test sequence
- Integrated timer 1-300 min with automatic tripping
- Integrated breakdown detection
- Integrated fault time detection
- Voltage measurement direct at HV output
- Protective ground connection
- High voltage start key interlock
- Protective circuit / indication in accord. with EN 50191
- Leakage current measurement during VLF test
Optional features
- Data logging (USB stick) for VLF test sets
- Frequency extension: 0.05 + 0.02 Hz
- Customized test cables
- Transport case
Sonel VLF Tester Software
The programme Sonel VLF Tester Software generates a test report based on the individual recorded data files.
The first page of the generated report is an overview. The following pages describe the individual tests of the power cable system. The software is easy to use, so you can quickly create a PDF report that is attractive to the end user.
Supported languages: Polish, English, Spanish, German, Czech, Italian. It is possible to generate a report in a language other than the one set for the interface.
- Technical Specification
Technical specification
S-24 VLF S-36 VLF S-44 VLF (230 V) S-44 VLF (110 V) S-57 VLF Index WMGBS24VLF WMGBS36VLF WMGBS44VLF WMPAS44VLF WMGBS57VLF Power supply 230 V (±10%),10 A, 50/60 Hz 230 V (±10%),10 A, 50/60 Hz 230 V (±10%),10 A, 50/60 Hz 110 V (100 V...127 V),15 A, 50/60 Hz 230 V (±10%), 10 A, 50/60 Hz Output voltage 0…24 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…34 kV DC 0…36 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…52 kV DC 0…44 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC 0…44 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC 0…57 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC Voltage waveshape VLF similar sine-wave, symmetrical, with True RMS measurement similar sine-wave, symmetrical, with True RMS measurement similar sine-wave, symmetrical, with True RMS measurement similar sine-wave, symmetrical, with True RMS measurement similar sine-wave, symmetrical, with True RMS measurement DC direct voltage, negative and positive polarity direct voltage, negative and positive polarity direct voltage, negative and positive polarity direct voltage, negative and positive polarity direct voltage, negative and positive polarity Overcurrent trip (DC) 10 mA 10 mA 10 mA 10 mA 10 mA Max. testable cable length, max. capacitance (VLF) up to 60 km (15 µF at 24 kVRMS, 0.02 Hz)* up to 60 km (15 µF at 18 kVRMS, 0.02 Hz)* up to 60 km (15.0 µF at 18 kVRMS, 0.02 Hz)* up to 60 km (15.0 µF at 6 kVRMS, 0.02 Hz)* up to 60 km (15.0 µF at 18 kVRMS, 0.02 Hz)** Max. load at max. output voltage (VLF) and 0.1 Hz 5 µF at 24 kVRMS 2.4 µF at 36 kVRMS 1.6 µF at 44 kVRMS 1.0 µF at 44 kVRMS 0.55 µF at 57 kVRMS Discharge - integrated automatic discharge device max. 9000 J max. 12500 J max. 12500 J max. 12500 J max. 12500 J Voltage measuring range -40…0…40 kV accuracy ±1% -60…0…60 kV accuracy ±1% -70…0…70 kV accuracy ±1% -70…0…70 kV accuracy ±1% -70…0…70 kV accuracy ±1% Current measuring ranges ±0…100 µA / 1 mA / 10 mA ±0…100 µA / 1 mA / 10 mA ±0…100 µA / 1 mA / 10 mA ±0…100 µA / 1 mA / 10 mA ±0…100 µA / 1 mA / 10 mA Operating temperature -20…+45°C
-4…+113°F-20…+45°C
-4…+113°F-20…+45°C
-4…+113°F-20…+45°C
-4…+113°F-20…+45°C
-4…+113°FStorage temperature -25…+70°C
-13…+158°F-25…+70°C
-13…+158°F-25…+70°C
-13…+158°F-25…+70°C
-13…+158°F-25…+70°C
-13…+158°FDuty continuous operation continuous operation continuous operation continuous operation continuous operation PC interface USB stick USB stick USB stick USB stick USB stick Construction in two parts: operation unit and high voltage unit in two parts: operation unit and high voltage unit in two parts: operation unit and high voltage unit in two parts: operation unit and high voltage unit in two parts: operation unit and high voltage unit *at a cable capacitance of approx. 0.25 µF/km
**at a cable capacitance of approx. 0.36 µF/km
- Optional accessories
- Files
