Description
HVI VLF-200CMF Hipot Tester Repair
The HVI VLF-200CMF is a 200 kV sinusoidal VLF cable hipot from High Voltage Inc. — among the highest-voltage true-sine VLF sets, for withstand-testing transmission-class cable at 0.1 Hz to IEEE 400.2. At 200 kV, insulation integrity and the output stage operate at the top of their range.
June Company repairs and calibrates the VLF-200CMF for utilities and specialist contractors on transmission-class cable.
Common VLF-200CMF problems we fix
- Won’t reach 200 kV or collapses under load — VLF output-stage failure on the highest-voltage unit, rebuilt for full output.
- Internal HV arcing or leakage — insulation breakdown, the priority at this voltage class, repaired and verified.
- Sine waveform distortion — regulation faults, corrected to IEEE 400.2.
- Control system faults — repaired.
- Metering drift — recalibrated.
FAQs
My VLF-200CMF arcs internally or won’t hold voltage — fixable? Yes. At 200 kV, insulation and output-stage faults are the focus; we repair them and verify clean, safe full-voltage sine output before return.
Is the HV section certified safe? Yes — insulation integrity and output verified with documented results.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.






