Details

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

The S-36VLF 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-36VLF 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

 

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Technical Specification

	S-24 VLF	S-36 VLF	S-44 VLF (230 V)	S-44 VLF (110 V)	S-57 VLF
Index	WMGBS24VLF	WMGBS36VLF	WMGBS44VLF	WMPAS44VLF	WMGBS57VLF
Power supply	230 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 voltage	0…24 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…34 kV DC	0…36 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…52 kV DC	0…44 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC	0…44 kVRMS VLF 0.1 Hz (option: 0.05 Hz + 0.02 Hz) ± 0…62 kV DC	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	similar sine-wave, symmetrical, with True RMS measurement	similar sine-wave, symmetrical, with True RMS measurement	similar sine-wave, symmetrical, with True RMS measurement	similar sine-wave, symmetrical, with True RMS measurement
DC	direct voltage, negative and positive polarity	direct voltage, negative and positive polarity	direct voltage, negative and positive polarity	direct voltage, negative and positive polarity	direct voltage, negative and positive polarity
Overcurrent trip (DC)	10 mA	10 mA	10 mA	10 mA	10 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 Hz	5 µF at 24 kVRMS	2.4 µF at 36 kVRMS	1.6 µF at 44 kVRMS	1.0 µF at 44 kVRMS	0.55 µF at 57 kVRMS
Discharge - integrated automatic discharge device	max. 9000 J	max. 12500 J	max. 12500 J	max. 12500 J	max. 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
Duty	continuous operation	continuous operation	continuous operation	continuous operation	continuous operation
PC interface	USB stick	USB stick	USB stick	USB stick	USB stick
Construction	in two parts: operation unit and high voltage unit	in two parts: operation unit and high voltage unit	in two parts: operation unit and high voltage unit	in two parts: operation unit and high voltage unit	in two parts: operation unit and high voltage unit