VLF Test Set - KPG 36kV VLF

The portable cable test set KPG 36kV 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 36kV 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 36kV VLF
Power supply	230 V (± 10%), 10 A, 50/60 Hz
Output voltage	0...36 kV_rms (51 kV_peak), 0.1 Hz VLF _{(0.05 Hz + 0.02 Hz optional)} ± 0...52 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)	4.9 µF at 18 kV_rms , 0.1 Hz (app. 20 km)^* 15 µF at 18 kV_rms , 0.02 Hz (app. 60 km)^* 2.4 µF at 36 kV_rms , 0.1 Hz (app. 9.6 km)^* 8.3 µF at 36 kV_rms , 0.02 Hz (app. 33 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	-60...0...60 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 48 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