Test the condition of the cables with VLF or DC slow voltage
The S-36VLF 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-36VLF 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
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 |
