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S-44 VLF (230 V)
Index: WMGBS44VLF
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-44VLF 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-44VLF 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.

      Evaluate the condition of cables using VLF or DC voltage

      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

      Overview

      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.

      Optional features

      • Data logging (USB stick) for VLF test sets
      • Frequency extension: 0.05 + 0.02 Hz
      • Customized test cables
      • Transport case
    • Technical specification

      Technical specification


      S-24 VLFS-36 VLFS-44 VLF (230 V)S-44 VLF (110 V)S-57 VLF
      IndekxWMGBS24VLFWMGBS36VLFWMGBS44VLFWMPAS44VLFWMGBS57VLF
      Power supply230 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 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 kVRMS1.5 µF at 44 kVRMS1.0 µF at 44 kVRMS0.9 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%-65…0…65 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-20…+45°C-20…+45°C-20…+45°C-20…+45°C
      Storage temperature-25…+70°C-25…+70°C-25…+70°C-25…+70°C-25…+70°C
      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