What Is A VLF Hipot Tester Used For?

In short, a VLF Hipot tester is a practical, efficient tool for keeping high-voltage systems safe and reliable.

A VLF (Very Low Frequency) Hipot tester is a specialized instrument used to assess the insulation quality of high-voltage cables and electrical equipment. Operating at frequencies between 0.1 Hz and 0.1 kHz, it applies a high voltage—often up to 100 kV—to reveal any weaknesses in the insulation. This approach is especially useful for testing aging cables or verifying newly installed ones before they go into service.

Compared with conventional high-voltage tests, the very low frequency greatly reduces capacitive charging current, making the method ideal for long cable runs. The compact, field-ready design of most Vlf units allows technicians to set up quickly on site without lengthy outages, and the results give a clear picture of insulation health so maintenance teams can prioritize repairs and avoid unexpected failures.

In short, a VLF Hipot tester is a practical, efficient tool for keeping high-voltage systems safe and reliable.

The Product Features of HZDP-60KV Vlf hipot tester

♢Advanced technology: digital frequency conversion technology, microcomputer control, pressure rise, pressure reduction, measurement, protection, etc♢ The test process is fully automated. ♢Easy to operate: simple wiring, fool operation. ♢Comprehensive protection: multiple protection (over-voltage protection, over- current protection at high and low voltage sides), rapid action (when acting)♢Room ≤ 10ms), the instrument is safe and reliable. ♢Safety and reliability: the controller is connected with the low voltage of the high voltage generator, with photoelectric control, safe and reliable use. ♢The high and low voltage closed-loop negative feedback control circuit is adopted, and the output has no capacity rise effect. ♢Complete configuration: capacitive touch screen, LCD Chinese character display, automatic storage, automatic printing. ♢Large test range: 0.1Hz, 0.05Hz and 0.02hz multi frequency selection, large test range. ♢Small volume and light weight: it is very convenient for outdoor operation. ♢Upper computer background management software（selective assembly）