VLF-90
The VLF-90 is a 90 kV peak sinusoidal VLF hipot test set that brings the family's highest rating…
- Maximum output voltage 0 – 90
- Output current 0 – 30
- Output frequencies 0.1 / 0.05 / 0.02 / 0.01
VLF-80
80 kV Very Low Frequency (VLF) AC Hipot / High-Voltage Cable Test Set
CE-tested 80 kV peak VLF hipot, the export flagship for routine, maintenance and post-repair testing of HV shielded power cables.
Maximum output voltage
0 – 80
Output current
0 – 30
Output frequencies
0.1 / 0.05 / 0.02 / 0.01
Load rating at 0.01 Hz
≤ 5.5
Measurement accuracy
± 3 % of reading
Controller + HV tank
4 + 50
Overview
Technical Specifications
| Specification | Value | Unit |
|---|---|---|
| Output AC voltage (peak, sinusoidal) | 0 – 80 | kV |
| Output current (peak) | 0 – 30 | mA |
| Output frequency | 0.1 / 0.05 / 0.02 / 0.01 | Hz sinusoidal |
| Duty cycle | Continuous | |
| @ 0.1 Hz | ≤ 0.5 | µF |
| @ 0.05 Hz | ≤ 1.1 | µF |
| @ 0.02 Hz | ≤ 2.2 | µF |
| @ 0.01 Hz | ≤ 5.5 | µF |
| Measurement accuracy | ± 3 % of reading | |
| Voltage positive / negative peak error | ≤ 3 % | |
| Controller unit weight | 4 | kg |
| High-voltage tank (booster) weight | 50 | kg |
| Design | Two-piece split system (controller + HV tank) | |
| Power supply | AC 220 V / AC 230 V, 50/60 Hz, or AC 120 V, 60 Hz | |
| Operating temperature | −10 … +50 | °C |
| Storage temperature | −20 … +70 | °C |
| Humidity | ≤ 85 % RH | |
Key Features
Export flagship of the VLF family
CE-tested 80 kV peak design widely specified by international cable contractors and rental fleets.
Routine, maintenance & post-repair testing
A controlled VLF overvoltage makes weak insulation and defective joints break down during the test so they can be repaired before the cable returns to service.
High-voltage shielded cable reach
80 kV peak output for medium/high-voltage shielded power cable circuits within its rating.
High capacitive load rating
Up to 5.5 µF at 0.01 Hz keeps full voltage on long, high-capacitance feeders.
Space-charge-free AC stress
Sinusoidal polarity-reversing waveform appropriate for modern XLPE/EPR insulation.
Rugged split two-piece system
4 kg controller plus 50 kg high-voltage tank, built for frequent transport.
Automatic interpretation & reporting
IEEE 400.2-2013 pass/fail on the 7-inch touch screen, stored internally and printed without a PC.
Applications
Routine & maintenance withstand testing
Periodic VLF proof testing of medium/high-voltage shielded power cables.
Post-installation / post-repair verification
Verification of large cable circuits after installation or repair work.
High-capacitance feeders
Proof testing of long distribution and sub-transmission feeder circuits.
Contractor & rental duty
Cable handover testing for contractors and rental-fleet operations.
Reliability programs
Utility and industrial cable ageing-management programs.
Frequently Asked Questions
What is the correct way to compare the VLF-80's voltage rating with a cable's test voltage?
The VLF-80 output is quoted as peak kV (80 kV peak). IEEE 400.2 field-test voltages for shielded cable are expressed as multiples of the cable's phase-to-earth voltage U0 (about 2×U0 for maintenance and up to 3×U0 for acceptance). Compare the required test level against the set's peak rating directly — never multiply the kV figure by √2.
Can the VLF-80 perform acceptance tests on every high-voltage cable class?
It performs VLF withstand testing on any shielded cable whose specified test voltage is within its 80 kV peak rating. Acceptance testing of higher system classes whose required test voltage exceeds the rating needs a higher-rated host; for such circuits the VLF-80 is applied at the appropriate maintenance/routine test level. Confirm the required test voltage for your cable class with the applicable specification.
Is the VLF-80 suitable for rental or contractor use with frequent transport?
Yes. The robust two-piece design (controller + 50 kg tank) has been through CE testing and is sized for frequent transport. Setup is quick: connect the high-voltage and return leads, then operate entirely from the touch screen.
Does the VLF-80 need a PC for reporting?
No. Results are interpreted automatically, stored internally and printed by the built-in thermal printer, so a complete field record is produced on site without a laptop.
Downloads
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