VLF Test Set - KPG 44kV VLF

The portable cable test set KPG 44kV VLF is used for testing of medium voltage cables in accordance to the standards IEC 60502-2, CENELEC HD 620 & 621, DIN VDE 0276/620 & 621 and IEEE400.

Test is carried out with a low strain practice with VLF (very low frequency) test voltage of preferably 0.1Hz.

VLF testing enables detection of damages of insulation within shortest test time.

The KPG 44kV VLF 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.

Application:

  • VLF Testing
  • DC Testing
  • Sheath Testing
Technical data KPG 44kV VLF
Power supply 230 V (± 10%), 10 A, 50/60 Hz
Output voltage 0...44 kVrms (62 kVpeak), 0.1 Hz VLF (0.05 Hz + 0.02 Hz optional)
± 0...62 kV DC
Voltage waveshapes VLF: similar sine-wave, symmetrical, with true R.M.S. measurement
DC:  direct voltage, negative and positive polarity
max. load (VLF)

4.1 µF at 19 kVrms , 0.1 Hz  (app. 16 km)*
14.6 µF at 19 kVrms , 0.02 Hz  (app. 58 km)*

1.5 µF at 44 kVrms , 0.1 Hz  (app. 6 km)*
6.3 µF at 44 kVrms , 0.02 Hz  (app. 25 km)*

* at a cable capacitance of 0.25 µF/km

Overcurrent trip (DC) 10 mA
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
Duty Continuous operation
PC interface
USB flash drive
Construction
in two parts, Operation unit and High Voltage unit
Weight
   Operation unit
   HV unit

17 kg
49 kg
Dimensions (W x H x D)
   Operation unit
   HV unit

37 x 34 x 20 cm
40 x 44 x 24 cm

Characteristics

  • Extremely compact high-power VLF test device
  • Easily portable from 1-2 person
  • Simple operation
  • Menue-assisted control with industrial grade OLED display
  • Fully automatic test sequence
  • Integrated timer with automatic tripping
  • Integrated breakdown detection
  • Integrated fault time detection
  • Voltage measurement direct at HV output
  • Protective ground circuit
  • Zero start interlocking
  • Protective circuit / indication in accord. with VDE 0104
  • Leakage current measurement during VLF test

Scope of supply

  • Operation unit with protective bag and cable storage
  • High Voltage unit
  • HV-connecting cable (shielded), standard length 5m
  • Connecting cable, HV unit to Operator unit, length 3m
  • Ground cables
  • User manual

Options / Accessories

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