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
Technical specification
| Model | S-57 VLF | ||||
|---|---|---|---|---|---|
| Index | WMGBS57VLF | ||||
| Power supply | 230 V (±10%), 10 A, 50/60 Hz | ||||
| Output voltage | 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 | ||||
| DC | direct voltage, negative and positive polarity | ||||
| Overcurrent trip (DC) | 10 mA | ||||
| Max. testable cable length, max. capacitance (VLF) | up to 60 km (15.0 µF at 18 kVRMS, 0.02 Hz)** | ||||
| Max. load at max. output voltage (VLF) and 0.1 Hz | 0.9 µF at 57 kVRMS | ||||
| Discharge – integrated automatic discharge device | max. 12500 J | ||||
| Voltage measuring range | -70…0…70 kV accuracy ±1% | ||||
| Current measuring ranges | ±0…100 µA / 1 mA / 10 mA | ||||
| Operating temperature | -20…+45°C -4…+113°F |
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| Storage temperature | -25…+70°C -13…+158°F |
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| Duty | continuous operation | ||||
| PC interface | USB stick | ||||
| Construction | in two parts: operation unit and high voltage unit |
