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S-44 VLF (110 V)
Index: WMPAS44VLF
High Voltage Insulation Tester
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    Description
    Technical specification
    Optional accessories
    Files
    • Description

      Test the condition of the cables with VLF or DC slow voltage  

      The S-44 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 VLFS-36 VLFS-44 VLF (230 V)S-44 VLF (110 V)S-57 VLF
      IndexWMGBS24VLFWMGBS36VLFWMGBS44VLFWMPAS44VLFWMGBS57VLF
      Power supply230 V (±10%),10 A, 50/60 Hz230 V (±10%),10 A, 50/60 Hz230 V (±10%),10 A, 50/60 Hz110 V (100 V...127 V),15 A, 50/60 Hz230 V (±10%), 10 A, 50/60 Hz
      Output voltage0…24 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…34 kV DC0…36 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…52 kV DC0…44 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC0…44 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC0…57 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC
      Voltage waveshape
      VLFsimilar sine-wave, symmetrical, with True RMS measurementsimilar sine-wave, symmetrical, with True RMS measurementsimilar sine-wave, symmetrical, with True RMS measurementsimilar sine-wave, symmetrical, with True RMS measurementsimilar sine-wave, symmetrical, with True RMS measurement
      DCdirect voltage, negative and positive polaritydirect voltage, negative and positive polaritydirect voltage, negative and positive polaritydirect voltage, negative and positive polaritydirect voltage, negative and positive polarity
      Overcurrent trip (DC)10 mA10 mA10 mA10 mA10 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 Hz5 µF at 24 kVRMS2.4 µF at 36 kVRMS1.6 µF at 44 kVRMS1.0 µF at 44 kVRMS0.55 µF at 57 kVRMS
      Discharge - integrated automatic discharge devicemax. 9000 Jmax. 12500 Jmax. 12500 Jmax. 12500 Jmax. 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
      Dutycontinuous operationcontinuous operationcontinuous operationcontinuous operationcontinuous operation
      PC interfaceUSB stickUSB stickUSB stickUSB stickUSB stick
      Constructionin two parts: operation unit and high voltage unitin two parts: operation unit and high voltage unitin two parts: operation unit and high voltage unitin two parts: operation unit and high voltage unitin 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