Test the condition of the cables with VLF or DC slow voltage
The compact, robust and portable cable test set is used for testing of medium voltage cables in accordance to the standards IEEE400, IEC 60502-2, CENELEC HD 620 & 621 and DIN VDE 0276/620 & 621. The test is carried out with a low strain practice with VLF (very low frequency) test voltage at 0.1 Hz frequency.
VLF test enables detection of damages of the insulation within shortest test time. The S VLF series device can test cables with extruded insulation (XLPE-, PE-, EPR-insulation) as well as cables with paper-oil insulation (PILC). Cable sheath testing with direct voltage is also possible.
Sonel offers online training course on the use of this product (instructional video and consultation with a specialist).
Features
Optional features
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°F |
| Storage 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°F |
| Duty | 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
