VLF Cable Testing

VLF cable testing with 0.01 Hz to 0.1 Hz is a standardized and state-of-the-art method to determine the condition of cables in medium- and high voltage networks. Compared to DC testing, it prevents damage to the insulation of aged extruded cables which can cause premature cable failures.. Due to these reasons, VLF AC waveform testing is recommended.

In order to fit the needs of all our clients, b2 electronics offers the widest range of VLF hipot test sets on the market,

• with test voltages from 29 kV to 120 kV (sine wave, DC or square wave) and
• output loads from 0.5 µF @ 0.1 Hz @ 20 kV_rms to 0.5 µF @ 0.1 Hz @ 85 kV_rms.

Compared to AC hipot test sets working at 50 or 60 Hz, VLF hipot test sets from b2 electronics are manufactured with a very small and lightweight design.
On the top of that, we offer a tailor-made b2 ControlCenter software, a powerful software solution for all HVA test sets in our portfolio.

The constant test frequency of VLF test sets allows simultaneous testing of dissipation factor / Tan Delta (TD) and Partial Discharge (PD), with reproducible results.
All of our VLF test sets are following guide IEEE 400.2 and are in compliance with standards HD 620 S1/A3 and IEC 60502-2 and their local derivations.

VLF is suitable for various insulations, such as XLPE, PILC, PE, EPR.

For close to 20 years we have developed and manufactured VLF high voltage systems for cable testing and diagnostics, serving power utilities and their supporting industries worldwide.