KEP VLF-60TD HiPot Cable Tester with Tan Delta

Introduction to the KEP VLF-6TD HiPot Cable Testerwith Tan Delta:

One of the most popular cable testing techniques nowadays is very low frequency testing, which, on the one hand, provides accurate testing results, and, on the other hand, does not damage good cable insulation. Tan delta (Tan δ, TD) testing, also called dissipation factor or loss angle, is used for measuring the degree of deterioration of shielded MV/HV cable insulation. The results reveal how contaminated, damaged, or water tree strewn the insulation has become.
Very low frequency (VLF) testing involves applying frequency in the range of 0.01 to 0.1 Hz to the cable under test, which is non-destructive to insulation of proper quality, but is enough to detect cable faults. Compared to DC cable testing, which can be damaging to good insulation, VLF testing does not have such a detrimental effect on the cable being tested and does not generate any travelling waves.

Very low frequency (VLF) testing involves applying frequency in the range of 0.01 to 0.1 Hz to the cable under test, which is non-destructive to insulation of proper quality, but is enough to detect cable faults. Compared to DC cable testing, which can be damaging to good insulation, VLF testing does not have such a detrimental effect on the cable being tested.

KEP VLF-60TD HiPot Cable Tester –  MAIN FEATURES:

• Efficient non-destructive cable withstand testing
• Portable, perfect for field testing
• Internal Tan Delta Function
• Test capacity of 10 µf
• Fully automatic testing cycle
• Automatic discharging
• Easy maintenance due to solid-type insulation system
• Breakdown voltage measurement and load recognition
• Easy-to-use software
• Does not need an external PC
• LCD touchscreen

KEP VLF-60TD HiPot Cable Tester – Technical Specifications:

Power supply and operation	Supply voltage	110 … 230 V ±10 % AC, single phase
	Supply frequency	50 / 60 Hz
	Power consumption	1.5 kVA
Output voltage	Setting and measurement range: –   Sinewave –   Bi-polar pulse –   DC+ –   DC- –   Vacuum bottle test –   Sheath test –   Sheath fault location	62 … 0.1 kVpeak (44 kVRMS) 62 … 0.1 kVpeak + 60 … 0.1 kV – 60 … 0.1 kV – 60 … 0.1 kV – 10 … 0.1 kV + 10 … 0.1 kV
	Measurement resolution	0.1 kV
	Relative accuracy	± (2 % + 2 dtg*)
	Indication	Real time wave visualization
Output current	Setting and measurement range: –   Sinewave –   Bi-polar pulse –   DC+ –   DC- –   Vacuum bottle test –   Sheath test –   Sheath fault location	0.1 … 40 mA peak (26 mARMS) 0.1 … 40 mA peak 0.1 … 40 mA 0.1 … 40 mA 1 … 1000 µA 0.1 … 40 mA 0.1 … 40 mA
	Measurement resolution	1 µA; 0.1 mA
	Relative accuracy	± (2 % + 2 dgt)
Output frequency (sinewave, bi-polar pulse)	Output frequency	0.01 … 0.1 Hz with 0.01 Hz step
	Frequency selection	–   Automatic –   Manual
Output power	1200 W
Breakdown management	Burn on Arc (keep arc burning)	Conditioning (burning) duration is preprogramed
	Trip out on Arc (current limit trip)	A test is stopped if leakage current threshold is reached or excided.
Object under test	Capacitance measuring range	0.1 nF … 12 µF
	Resistance range**	10 kOhm … 20 GOhm
	Maximum load	–  1.0 µF at 0.1 Hz and 44 kVRMS –   5.0 µF at 0.01 Hz and 44 kVRMS
	Duty cycle	Continuous, unlimited
Tan Delta*	Resolution	± 1×10-5
	Range	1×10-4 … 1
	Absolute error	± 1×10-4
	Auto Tan Delta test	According to IEEE 400.2-2013
Metering	–      Voltage and Current (RMS and/or peak) –     Capacitance –      Resistance –     Test time –     Flashover voltage and current –     Tan δ***
Controls and interfaces	Connection interfaces	–  USB-A (user memory stick, formatted under FAT32) –  USB-B (service only) –  RS-485 (service only)
	Display	5.7” colour TFT, 640 × 480, capacitive multi-touch
	Secondary control interface	Rotary encoder
	Internal memory	10’000 test reports
Safety	Protective devices	–   Automatic internal dual discharge –  Indication of high voltage presence on the load –  Emergency OFF button –   Operator lockout key
	Protection rating (in accordance to EN 60529)	IP 21 (with lid closed)
Physical	Dimensions, H x W x D	528 x 577 x 408 mm
	Weight	64 kg
*    dtg – an error in least significant digits, that is constant regardless of the input.

The KEP VLF-60TD HiPot Cable Tester is designed for an indoors operation under the following conditions: